/**************************************************************************** ** ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/ ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.0, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** In addition, as a special exception, Trolltech, as the sole copyright ** holder for Qt Designer, grants users of the Qt/Eclipse Integration ** plug-in the right for the Qt/Eclipse Integration to link to ** functionality provided by Qt Designer and its related libraries. ** ** Trolltech reserves all rights not expressly granted herein. ** ** Trolltech ASA (c) 2007 ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include "qapplication.h" #include "qapplication_p.h" #include "qbrush.h" #include "qcursor.h" #include "qdesktopwidget.h" #include "qevent.h" #include "qhash.h" #include "qlayout.h" #include "qmenu.h" #include "qmetaobject.h" #include "qpixmap.h" #include "qpointer.h" #include "qstack.h" #include "qstyle.h" #include "qstylefactory.h" #include "qvariant.h" #include "qwidget.h" #include "qstyleoption.h" #ifndef QT_NO_ACCESSIBILITY # include "qaccessible.h" #endif #if defined(Q_WS_WIN) # include "qt_windows.h" #endif #ifdef Q_WS_MAC # include "qt_mac_p.h" #endif #if defined(Q_WS_QWS) # include "qwsmanager_qws.h" # include "qpaintengine.h" // for PorterDuff # include "private/qwindowsurface_qws_p.h" #endif #include "qpainter.h" #include "qtooltip.h" #include "qwhatsthis.h" #include "qdebug.h" #include "private/qstylesheetstyle_p.h" #include "private/qstyle_p.h" #include "qinputcontext.h" #ifdef Q_WS_WIN # include #endif #if defined(Q_WS_X11) # include # include "qx11info_x11.h" #endif #include #ifndef Q_WS_MAC # include #else # include #endif #include "qwidget_p.h" #include "qaction_p.h" #include "qlayout_p.h" // widget/widget data creation count //#define QWIDGET_EXTRA_DEBUG QWidgetPrivate::QWidgetPrivate(int version) : QObjectPrivate(version), extra(0), focus_child(0) ,layout(0) ,leftmargin(0), topmargin(0), rightmargin(0), bottommargin(0) ,leftLayoutItemMargin(0), topLayoutItemMargin(0), rightLayoutItemMargin(0) ,bottomLayoutItemMargin(0) ,fg_role(QPalette::NoRole) ,bg_role(QPalette::NoRole) ,hd(0) #ifdef Q_RATE_LIMIT_PAINTING ,timerId(-1) #endif #if defined(Q_WS_X11) ,picture(0) #endif ,polished(0) , size_policy(QSizePolicy::Preferred, QSizePolicy::Preferred) { if (!qApp) { qFatal("QWidget: Must construct a QApplication before a QPaintDevice"); return; } if (version != QObjectPrivateVersion) qFatal("Cannot mix incompatible Qt libraries"); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS dirtyOpaqueChildren = true; #endif isWidget = true; memset(high_attributes, 0, sizeof(high_attributes)); #ifdef QWIDGET_EXTRA_DEBUG static int count = 0; qDebug() << "widgets" << ++count; #endif } QWidgetPrivate::~QWidgetPrivate() { #ifdef Q_WIDGET_USE_DIRTYLIST if (!dirty.isEmpty()) { Q_Q(QWidget); QWidgetBackingStore *bs = maybeBackingStore(); if (bs) bs->removeDirtyWidget(q); } #endif if (extra) deleteExtra(); } /*! \internal This is an internal function, you should never call this. This function is called to focus associated input context. The code intends to eliminate duplicate focus for the context even if the context is shared between widgets \sa QInputContext::setFocus() */ void QWidgetPrivate::focusInputContext() { #ifndef QT_NO_IM Q_Q(QWidget); QInputContext *qic = q->inputContext(); if (qic) { if(qic->focusWidget() != q) qic->setFocusWidget(q); } #endif // QT_NO_IM } /*! \internal */ void QWidgetPrivate::scrollChildren(int dx, int dy) { Q_Q(QWidget); if (q->children().size() > 0) { // scroll children QPoint pd(dx, dy); QObjectList childObjects = q->children(); for (int i = 0; i < childObjects.size(); ++i) { // move all children QWidget *w = qobject_cast(childObjects.at(i)); if (w && !w->isWindow()) { QPoint oldp = w->pos(); QRect r(w->pos() + pd, w->size()); w->data->crect = r; #ifndef Q_WS_QWS if (w->testAttribute(Qt::WA_WState_Created)) w->d_func()->setWSGeometry(); #endif QMoveEvent e(r.topLeft(), oldp); QApplication::sendEvent(w, &e); } } } } /*! This function returns the QInputContext for this widget. By default the input context is inherited from the widgets parent. For toplevels it is inherited from QApplication. You can override this and set a special input context for this widget by using the setInputContext() method. \sa setInputContext() */ QInputContext *QWidget::inputContext() { Q_D(QWidget); if (!testAttribute(Qt::WA_InputMethodEnabled)) return 0; #ifndef QT_NO_IM if (d->ic) return d->ic; #endif return qApp->inputContext(); } /*! This function sets the input context \a context on this widget. \sa inputContext() */ void QWidget::setInputContext(QInputContext *context) { Q_D(QWidget); if (!testAttribute(Qt::WA_InputMethodEnabled)) return; #ifndef QT_NO_IM if (d->ic) delete d->ic; d->ic = context; #endif } /*! This function can be called on the widget that currently has focus to reset the input method operating on it. \sa QInputContext, QInputContext::reset() */ void QWidget::resetInputContext() { if (!hasFocus()) return; #ifndef QT_NO_IM QInputContext *qic = this->inputContext(); if( qic ) qic->reset(); #endif // QT_NO_IM } #ifdef QT_KEYPAD_NAVIGATION QPointer QWidgetPrivate::editingWidget; /*! Returns true if this widget currently has edit focus; otherwise false. This feature is available in Qtopia Core only. \sa setEditFocus(), QApplication::keypadNavigationEnabled() */ bool QWidget::hasEditFocus() const { const QWidget* w = this; while (w->d_func()->extra && w->d_func()->extra->focus_proxy) w = w->d_func()->extra->focus_proxy; return QWidgetPrivate::editingWidget == w; } /*! \fn void QWidget::setEditFocus(bool enable) If \a enable is true, make this widget have edit focus, in which case Qt::Key_Up and Qt::Key_Down will be delivered to the widget normally; otherwise, Qt::Key_Up and Qt::Key_Down are used to change focus. This feature is available in Qtopia Core only. \sa hasEditFocus(), QApplication::keypadNavigationEnabled() */ void QWidget::setEditFocus(bool on) { QWidget *f = this; while (f->d_func()->extra && f->d_func()->extra->focus_proxy) f = f->d_func()->extra->focus_proxy; if (QWidgetPrivate::editingWidget && QWidgetPrivate::editingWidget != f) QWidgetPrivate::editingWidget->setEditFocus(false); if (on && !f->hasFocus()) f->setFocus(); if ((!on && !QWidgetPrivate::editingWidget) || (on && QWidgetPrivate::editingWidget == f)) { return; } if (!on && QWidgetPrivate::editingWidget == f) { QWidgetPrivate::editingWidget = 0; QEvent event(QEvent::LeaveEditFocus); QApplication::sendEvent(f, &event); QApplication::sendEvent(f->style(), &event); } else if (on) { QWidgetPrivate::editingWidget = f; QEvent event(QEvent::EnterEditFocus); QApplication::sendEvent(f, &event); QApplication::sendEvent(f->style(), &event); } } #endif /*! \property QWidget::autoFillBackground \brief whether the widget background is filled automatically \since 4.1 If enabled, this will cause Qt to fill the background using the widget's background role before invoking the paint event. The background role is defined by the widget's \l{palette}. In addition, Windows are always filled with QPalette::Window, unless the WA_OpaquePaintEvent or WA_NoSystemBackground attributes are set. \warning Do not set this property when using \l{Qt Style Sheets}. When using style sheets, the widget is always filled with the "background" property. The "border-radius" property may be used to clip the background. \sa Qt::WA_OpaquePaintEvent, Qt::WA_NoSystemBackground */ bool QWidget::autoFillBackground() const { Q_D(const QWidget); return d->extra && d->extra->autoFillBackground; } void QWidget::setAutoFillBackground(bool enabled) { Q_D(QWidget); if (!d->extra) d->createExtra(); if (d->extra->autoFillBackground == enabled) return; d->extra->autoFillBackground = enabled; d->updateIsOpaque(); update(); d->updateIsOpaque(); } /*! \class QWidget \brief The QWidget class is the base class of all user interface objects. \ingroup basicwidgets \mainclass The widget is the atom of the user interface: it receives mouse, keyboard and other events from the window system, and paints a representation of itself on the screen. Every widget is rectangular, and they are sorted in a Z-order. A widget is clipped by its parent and by the widgets in front of it. A widget that isn't embedded in a parent widget is called a window. Usually, windows have a frame and a title bar, although it is also possible to create windows without such decoration using suitable \l{Qt::WindowFlags}{window flags}). In Qt, QMainWindow and the various subclasses of QDialog are the most common window types. Every widget's constructor accepts one or two standard arguments: \list 1 \i \c{QWidget *parent = 0} is the parent of the new widget. If it is 0 (the default), the new widget will be a window. If not, it will be a child of \e parent, and be constrained by \e parent's geometry (unless you specify Qt::Window as window flag). \i \c{Qt::WindowFlags f = 0} (where available) sets the window flags; the default is suitable for almost all widgets, but to get, for example, a window without a window system frame, you must use special flags. \endlist QWidget has many member functions, but some of them have little direct functionality; for example, QWidget has a font property, but never uses this itself. There are many subclasses which provide real functionality, such as QLabel, QPushButton, QListWidget, and QTabWidget. \section1 Top-Level and Child Widgets A widget without a parent widget is always an independent window (top-level widget). For these widgets, setWindowTitle() and setWindowIcon() set the title bar and icon respectively. Non-window widgets are child widgets, and are displayed within their parent widgets. Most widgets in Qt are mainly useful as child widgets. For example, it is possible to display a button as a top-level window, but most people prefer to put their buttons inside other widgets, such as QDialog. \image parent-child-widgets.png A parent widget containing various child widgets. The above diagram shows a QGroupBox widget being used to hold various child widgets in a layout provided by QGridLayout. The QLabel child widgets have been outlined to indicate their full sizes. If you want to use a QWidget to hold child widgets you will usually want to add a layout to the parent QWidget. See \l{Layout Classes} for more information about these. \section1 Composite Widgets When a widgets is used as a container to group a number of child widgets, it is known as a composite widget. These can be created by constructing a widget with the required visual properties - a QFrame, for example - and adding child widgets to it, usually managed by a layout. The above diagram shows such a composite widget that was created using \l{Qt Designer}. Composite widgets can also be created by subclassing a standard widget, such as QWidget or QFrame, and adding the necessary layout and child widgets in the constructor of the subclass. Many of the \l{Qt Examples}{examples provided with Qt} use this approach, and it is also covered in the \l{Qt Tutorial}. \section1 Custom Widgets and Painting Since QWidget is a subclass of QPaintDevice, subclasses can be used to display custom content that is composed using a series of painting operations with an instance of the QPainter class. This approach contrasts with the canvas-style approach used by the \l{Graphics View}{Graphics View Framework} where items are added to a scene by the application and are rendered by the framework itself. Each widget performs all painting operations from within its paintEvent() function. This is called whenever the widget needs to be redrawn, either as a result of some external change or when requested by the application. The \l{widgets/analogclock}{Analog Clock example} shows how a simple widget can handle paint events. \section1 Size Hints and Size Policies When implementing a new widget, it is almost always useful to reimplement sizeHint() to provide a reasonable default size for the widget and to set the correct size policy with setSizePolicy(). By default, composite widgets which do not provide a size hint will be sized according to the space requirements of their child widgets. The size policy lets you supply good default behavior for the layout management system, so that other widgets can contain and manage yours easily. The default size policy indicates that the size hint represents the preferred size of the widget, and this is often good enough for many widgets. \section1 Events Widgets respond to events that are typically caused by user actions. Qt delivers events to widgets by calling specific event handler functions with instances of QEvent subclasses containing information about each event. If your widget only contains child widgets, you probably do not need to implement any event handlers. If you want to detect a mouse click in a child widget call the child's underMouse() function inside the widget's mousePressEvent(). The \l{widgets/scribble}{Scribble example} implements a wider set of events to handle mouse movement, button presses, and window resizing. You will need to supply the behavior and content for your own widgets, but here is a brief overview of the events that are relevant to QWidget, starting with the most common ones: \list \i paintEvent() is called whenever the widget needs to be repainted. Every widget which displays custom content must implement it. Painting using a QPainter can only take place in a paintEvent() or a function called by a paintEvent(). \i resizeEvent() is called when the widget has been resized. \i mousePressEvent() is called when a mouse button is pressed when the mouse is inside it, or when it has grabbed the mouse using grabMouse(). \i mouseReleaseEvent() is called when a mouse button is released. A widget receives mouse release events when it has received the corresponding mouse press event. This means that if the user presses the mouse inside \e your widget, then drags the mouse to somewhere else before releasing the mouse button, \e your widget receives the release event. There is one exception: if a popup menu appears while the mouse button is held down, this popup immediately steals the mouse events. \i mouseDoubleClickEvent() is called when the user double clicks in the widget. If the user double-clicks, the widget receives a mouse press event, a mouse release event and finally this event instead of a second mouse press event. (Some mouse move events may also be received if the user doesn't hold the mouse steady during this operation.) It is \e{not possible} to distinguish a click from a double click until the second click arrives. (This is one reason why most GUI books recommend that double clicks be an extension of single clicks, rather than trigger a different action.) \endlist Widgets that accept keyboard input need to reimplement a few more event handlers: \list \i keyPressEvent() is called whenever a key is pressed, and again when a key has been held down long enough for it to auto-repeat. Note that the \key Tab and \key Shift+Tab keys are only passed to the widget if they are not used by the focus-change mechanisms. To force those keys to be processed by your widget, you must reimplement QWidget::event(). \i focusInEvent() is called when the widget gains keyboard focus (assuming you have called setFocusPolicy()). Well written widgets indicate that they own the keyboard focus in a clear but discreet way. \i focusOutEvent() is called when the widget loses keyboard focus. \endlist Some widgets will also need to reimplement some of the less common event handlers: \list \i mouseMoveEvent() is called whenever the mouse moves while a button is held down. This can be useful during drag and drop operations. If you call setMouseTracking(true), you get mouse move events even when no buttons are held down. (See also the guide to \l{Drag and Drop}.) \i keyReleaseEvent() is called whenever a key is released, and also while it is held down if the key is auto-repeating. In that case the widget receives a pair of key release and key press events for every repeat. Note that the \key Tab and \key Shift+Tab keys are only passed to the widget if they are not used by the focus-change mechanisms. To force those keys to be processed by your widget, you must reimplement QWidget::event(). \i wheelEvent() is called whenever the user turns the mouse wheel while the widget has the focus. \i enterEvent() is called when the mouse enters the widget's screen space. (This excludes screen space owned by any children of the widget.) \i leaveEvent() is called when the mouse leaves the widget's screen space. Note that if the mouse enters a child widget it will not cause a leaveEvent. \i moveEvent() is called when the widget has been moved relative to its parent. \i closeEvent() is called when the user closes the widget (or when close() is called). \endlist There are also some rather obscure events described in the QEvent::Type documentation. You need to reimplement event() directly to handle these. The default implementation of event() handles \key Tab and \key Shift+Tab (to move the keyboard focus), and passes on most other events to one of the more specialized handlers above. Events and the mechanism used to deliver them are covered in the \l{Events and Event Filters} document. \section1 Groups of Functions and Properties \table \header \i Context \i Functions and Properties \row \i Window functions \i show(), hide(), raise(), lower(), close(). \row \i Top-level windows \i \l windowModified, \l windowTitle, \l windowIcon, \l windowIconText, \l isActiveWindow, activateWindow(), \l minimized, showMinimized(), \l maximized, showMaximized(), \l fullScreen, showFullScreen(), showNormal(). \row \i Window contents \i update(), repaint(), scroll(). \row \i Geometry \i \l pos, x(), y(), \l rect, \l size, width(), height(), move(), resize(), \l sizePolicy, sizeHint(), minimumSizeHint(), updateGeometry(), layout(), \l frameGeometry, \l geometry, \l childrenRect, \l childrenRegion, adjustSize(), mapFromGlobal(), mapToGlobal(), mapFromParent(), mapToParent(), \l maximumSize, \l minimumSize, \l sizeIncrement, \l baseSize, setFixedSize() \row \i Mode \i \l visible, isVisibleTo(), \l enabled, isEnabledTo(), \l modal, isWindow(), \l mouseTracking, \l updatesEnabled, visibleRegion(). \row \i Look and feel \i style(), setStyle(), \l styleSheet, \l cursor, \l font, \l palette, backgroundRole(), setBackgroundRole(), fontInfo(), fontMetrics(). \row \i Keyboard focus functions \i \l focus, \l focusPolicy, setFocus(), clearFocus(), setTabOrder(), setFocusProxy(), focusNextChild(), focusPreviousChild(). \row \i Mouse and keyboard grabbing \i grabMouse(), releaseMouse(), grabKeyboard(), releaseKeyboard(), mouseGrabber(), keyboardGrabber(). \row \i Event handlers \i event(), mousePressEvent(), mouseReleaseEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), keyPressEvent(), keyReleaseEvent(), focusInEvent(), focusOutEvent(), wheelEvent(), enterEvent(), leaveEvent(), paintEvent(), moveEvent(), resizeEvent(), closeEvent(), dragEnterEvent(), dragMoveEvent(), dragLeaveEvent(), dropEvent(), childEvent(), showEvent(), hideEvent(), customEvent(). changeEvent(), \row \i System functions \i parentWidget(), window(), setParent(), winId(), find(), metric(). \row \i Interactive help \i setToolTip(), setWhatsThis() \endtable \section1 Widget Style Sheets In addition to the standard widget styles for each platform, widgets can also be styled according to rules specified in a \l{styleSheet}{style sheet}. This feature enables you to customize the appearance of specific widgets to provide visual cues to users about their purpose; for example, a button could be styled in a particular way to indicate that it performs a destructive action. The use of widgets style sheets is described in more detail in \l{Qt Style Sheets}. \section1 Transparency and Double Buffering From Qt 4.0, QWidget automatically double-buffers its painting, so there's no need to write double-buffering code in paintEvent() to avoid flicker. Additionally, it became possible for widgets to propagate their contents to children, in order to enable transparency effects, by setting the Qt::WA_ContentsPropagated widget attribute - this is now deprecated in Qt 4.1. In Qt 4.1, the contents of parent widgets are propagated by default to each of their children. Custom widgets can be written to take advantage of this feature by only updating irregular regions (to create non-rectangular child widgets), or by using painting with colors that have less than the full alpha component. The following diagram shows how attributes and properties of a custom widget can be fine-tuned to achieve different effects. \image propagation-custom.png In the above diagram, a semi-transparent rectangular child widget with an area removed is constructed and added to a parent widget (a QLabel showing a pixmap) then different properties and widget attributes are set to achieve different effects: \list \o The left widget has no additional properties or widget attributes set. This default state suits most custom widgets that use transparency or are irregularly-shaped, and that do not paint over their entire area with an opaque brush. \o The center widget has the \l autoFillBackground property set. This property is used with custom widgets that rely on the widget to supply a default background, and do not paint over their entire area with an opaque brush. \o The right widget has the Qt::WA_OpaquePaintEvent widget attribute set. This indicates that the widget will paint over its entire area with opaque colors. The widget's area will initially be \e{uninitialized} (represented in the diagram by a red diagonal grid pattern that shines through the overpainted area). This is useful for widgets that need to paint their own specialized contents quickly and that do not need a default filled background. \endlist For rapidly updating custom widgets with simple background colors, such as real-time plotting or graphing widgets, it is better to define a suitable background color (using setBackgroundRole() with the QPalette::Window role), set the \l autoFillBackground property, and only implement the necessary drawing functionality in the widget's paintEvent(). For rapidly updating custom widgets that constantly paint over their entire areas with opaque content, such as video streaming widgets, it is better to set the widget's Qt::WA_OpaquePaintEvent, avoiding any unnecessary overhead associated with repainting the widget's background. If a widget has both the Qt::WA_OpaquePaintEvent widget attribute \e{and} the \l autoFillBackground property set, the Qt::WA_OpaquePaintEvent attribute takes precedence. You should choose just one of these depending on your requirements. In Qt 4.1, the contents of parent widgets are also propagated to standard Qt widgets. This can lead to some unexpected results if the parent widget is decorated in a non-standard way, as shown in the diagram below. \image propagation-standard.png The scope for customizing the painting behavior of standard Qt widgets, without resorting to subclassing, is slightly less than that possible for custom widgets. Usually, the desired appearance of a standard widget can be achieved by setting its \l autoFillBackground property. \sa QEvent, QPainter, QGridLayout, QBoxLayout */ QWidgetMapper *QWidgetPrivate::mapper = 0; // widget with wid QWidgetSet *QWidgetPrivate::uncreatedWidgets = 0; // widgets with no wid /***************************************************************************** QWidget utility functions *****************************************************************************/ static QFont qt_naturalWidgetFont(QWidget* w) { QFont naturalfont = QApplication::font(w); if (w->parentWidget() && !w->testAttribute(Qt::WA_StyleSheet) && (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))) { if (!naturalfont.isCopyOf(QApplication::font())) naturalfont = naturalfont.resolve(w->parentWidget()->font()); else naturalfont = w->parentWidget()->font(); } naturalfont.resolve(0); return naturalfont; } static QPalette qt_naturalWidgetPalette(QWidget* w) { QPalette naturalpalette = QApplication::palette(w); if (w->parentWidget() && !w->testAttribute(Qt::WA_StyleSheet) && (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))) { if (!naturalpalette.isCopyOf(QApplication::palette())) naturalpalette = naturalpalette.resolve(w->parentWidget()->palette()); else naturalpalette = w->parentWidget()->palette(); } naturalpalette.resolve(0); return naturalpalette; } /***************************************************************************** QWidget member functions *****************************************************************************/ /* Widget state flags: \list \i Qt::WA_WState_Created The widget has a valid winId(). \i Qt::WA_WState_Visible The widget is currently visible. \i Qt::WA_WState_Hidden The widget is hidden, i.e. it won't become visible unless you call show() on it. Qt::WA_WState_Hidden implies !Qt::WA_WState_Visible. \i Qt::WA_WState_CompressKeys Compress keyboard events. \i Qt::WA_WState_BlockUpdates Repaints and updates are disabled. \i Qt::WA_WState_InPaintEvent Currently processing a paint event. \i Qt::WA_WState_Reparented The widget has been reparented. \i Qt::WA_WState_ConfigPending A configuration (resize/move) event is pending. \i Qt::WA_WState_DND (Deprecated) The widget supports drag and drop, see setAcceptDrops(). \endlist */ /*! Constructs a widget which is a child of \a parent, with widget flags set to \a f. If \a parent is 0, the new widget becomes a window. If \a parent is another widget, this widget becomes a child window inside \a parent. The new widget is deleted when its \a parent is deleted. The widget flags argument, \a f, is normally 0, but it can be set to customize the frame of a window (i.e. \a parent must be 0). To customize the frame, use a value composed from the bitwise OR of any of the \l{Qt::WindowFlags}{window flags}. If you add a child widget to an already visible widget you must explicitly show the child to make it visible. Note that the X11 version of Qt may not be able to deliver all combinations of style flags on all systems. This is because on X11, Qt can only ask the window manager, and the window manager can override the application's settings. On Windows, Qt can set whatever flags you want. \sa windowFlags */ QWidget::QWidget(QWidget *parent, Qt::WindowFlags f) : QObject(*new QWidgetPrivate, 0), QPaintDevice() { d_func()->init(parent, f); } #ifdef QT3_SUPPORT /*! \overload \obsolete */ QWidget::QWidget(QWidget *parent, const char *name, Qt::WindowFlags f) : QObject(*new QWidgetPrivate, 0), QPaintDevice() { d_func()->init(parent , f); setObjectName(QString::fromAscii(name)); } #endif /*! \internal */ QWidget::QWidget(QWidgetPrivate &dd, QWidget* parent, Qt::WindowFlags f) : QObject(dd, 0), QPaintDevice() { d_func()->init(parent, f); } /*! \internal */ int QWidget::devType() const { return QInternal::Widget; } //### w is a "this" ptr, passed as a param because QWorkspace needs special logic void QWidgetPrivate::adjustFlags(Qt::WindowFlags &flags, QWidget *w) { bool customize = (flags & (Qt::CustomizeWindowHint | Qt::FramelessWindowHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint | Qt::WindowContextHelpButtonHint)); uint type = (flags & Qt::WindowType_Mask); if ((type == Qt::Widget || type == Qt::SubWindow) && w && !w->parent()) { type = Qt::Window; flags |= Qt::Window; } if (customize) ; else if (type == Qt::Dialog || type == Qt::Sheet) flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowContextHelpButtonHint; else if (type == Qt::Tool) flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint; else flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint; } void QWidgetPrivate::init(QWidget *parentWidget, Qt::WindowFlags f) { Q_Q(QWidget); if (qApp->type() == QApplication::Tty) qFatal("QWidget: Cannot create a QWidget when no GUI is being used"); Q_ASSERT(uncreatedWidgets); uncreatedWidgets->insert(q); QWidget *desktopWidget = 0; if (parentWidget && parentWidget->windowType() == Qt::Desktop) { desktopWidget = parentWidget; parentWidget = 0; } q->data = &data; #ifndef QT_NO_THREAD if (!q->parent()) { Q_ASSERT_X(q->thread() == qApp->thread(), "QWidget", "Widgets must be created in the GUI thread."); } #endif #if defined(Q_WS_X11) if (desktopWidget) { // make sure the widget is created on the same screen as the // programmer specified desktop widget xinfo = desktopWidget->d_func()->xinfo; } #else Q_UNUSED(desktopWidget); #endif data.fstrut_dirty = true; data.winid = 0; data.widget_attributes = 0; data.window_flags = f; data.window_state = 0; data.focus_policy = 0; data.context_menu_policy = Qt::DefaultContextMenu; data.window_modality = Qt::NonModal; data.sizehint_forced = 0; data.is_closing = 0; data.in_show = 0; data.in_set_window_state = 0; data.in_destructor = false; q->setAttribute(Qt::WA_QuitOnClose); // might be cleared in create() q->setAttribute(Qt::WA_WState_Hidden); //give potential windows a bigger "pre-initial" size; create_sys() will give them a new size later data.crect = parentWidget ? QRect(0,0,100,30) : QRect(0,0,640,480); focus_next = focus_prev = q; if ((f & Qt::WindowType_Mask) == Qt::Desktop) q->create(); else if (parentWidget) q->setParent(parentWidget, data.window_flags); else { adjustFlags(data.window_flags, q); resolveLayoutDirection(); } #if defined(Q_WS_X11) data.fnt.x11SetScreen(xinfo.screen()); #endif // Q_WS_X11 q->setAttribute(Qt::WA_PendingMoveEvent); q->setAttribute(Qt::WA_PendingResizeEvent); if (++QWidgetPrivate::instanceCounter > QWidgetPrivate::maxInstances) QWidgetPrivate::maxInstances = QWidgetPrivate::instanceCounter; if (QApplicationPrivate::app_compile_version < 0x040200 || QApplicationPrivate::testAttribute(Qt::AA_ImmediateWidgetCreation)) q->create(); QEvent e(QEvent::Create); QApplication::sendEvent(q, &e); QApplication::postEvent(q, new QEvent(QEvent::PolishRequest)); extraPaintEngine = 0; } void QWidgetPrivate::createRecursively() { Q_Q(QWidget); q->create(0, true, true); for (int i = 0; i < children.size(); ++i) { QWidget *child = qobject_cast(children.at(i)); if (child && !child->isHidden() && !child->isWindow() && !child->testAttribute(Qt::WA_WState_Created)) child->d_func()->createRecursively(); } } /*! Creates a new widget window if \a window is 0, otherwise sets the widget's window to \a window. Initializes the window (sets the geometry etc.) if \a initializeWindow is true. If \a initializeWindow is false, no initialization is performed. This parameter only makes sense if \a window is a valid window. Destroys the old window if \a destroyOldWindow is true. If \a destroyOldWindow is false, you are responsible for destroying the window yourself (using platform native code). The QWidget constructor calls create(0,true,true) to create a window for this widget. */ void QWidget::create(WId window, bool initializeWindow, bool destroyOldWindow) { Q_D(QWidget); if (testAttribute(Qt::WA_WState_Created) && window == 0) return; if (d->data.in_destructor) return; Qt::WindowType type = windowType(); Qt::WindowFlags &flags = data->window_flags; if ((type == Qt::Widget || type == Qt::SubWindow) && !parentWidget()) { type = Qt::Window; flags |= Qt::Window; } if (parentWidget() && (type & Qt::Window) && !parentWidget()->testAttribute(Qt::WA_WState_Created)) parentWidget()->createWinId(); #ifdef QT3_SUPPORT if (flags & Qt::WStaticContents) setAttribute(Qt::WA_StaticContents); if (flags & Qt::WDestructiveClose) setAttribute(Qt::WA_DeleteOnClose); if (flags & Qt::WShowModal) setWindowModality(Qt::ApplicationModal); if (flags & Qt::WMouseNoMask) setAttribute(Qt::WA_MouseNoMask); if (flags & Qt::WGroupLeader) setAttribute(Qt::WA_GroupLeader); if (flags & Qt::WNoMousePropagation) setAttribute(Qt::WA_NoMousePropagation); #endif if ( type != Qt::Widget && type != Qt::Window && type != Qt::Dialog) setAttribute(Qt::WA_QuitOnClose, false); setAttribute(Qt::WA_WState_Created); // set created flag d->create_sys(window, initializeWindow, destroyOldWindow); // a real toplevel window needs a backing store #ifndef Q_WS_MAC if (isWindow()) { delete d->topData()->backingStore; // QWidgetBackingStore will check this variable, hence it must be 0 d->topData()->backingStore = 0; d->topData()->backingStore = new QWidgetBackingStore(this); } #endif d->setModal_sys(); if (!isWindow() && parentWidget() && parentWidget()->testAttribute(Qt::WA_DropSiteRegistered)) setAttribute(Qt::WA_DropSiteRegistered, true); #ifdef QT_EVAL extern void qt_eval_init_widget(QWidget *w); qt_eval_init_widget(this); #endif // need to force the resting of the icon after changing parents if (testAttribute(Qt::WA_SetWindowIcon)) d->setWindowIcon_sys(true); if (isWindow() && !d->topData()->iconText.isEmpty()) d->setWindowIconText_helper(d->topData()->iconText); if (windowType() != Qt::Desktop) { d->updateSystemBackground(); if (isWindow() && !testAttribute(Qt::WA_SetWindowIcon)) d->setWindowIcon_sys(); } } /*! Destroys the widget. All this widget's children are deleted first. The application exits if this widget is the main widget. */ QWidget::~QWidget() { Q_D(QWidget); d->data.in_destructor = true; #if defined (QT_CHECK_STATE) if (paintingActive()) qWarning("QWidget: %s (%s) deleted while being painted", className(), name()); #endif // force acceptDrops false before winId is destroyed. d->registerDropSite(false); #ifndef QT_NO_ACTION // remove all actions from this widget for (int i = 0; i < d->actions.size(); ++i) { QActionPrivate *apriv = d->actions.at(i)->d_func(); apriv->widgets.removeAll(this); } d->actions.clear(); #endif #ifndef QT_NO_SHORTCUT // Remove all shortcuts grabbed by this // widget, unless application is closing if (!QApplicationPrivate::is_app_closing && testAttribute(Qt::WA_GrabbedShortcut)) qApp->d_func()->shortcutMap.removeShortcut(0, this, QKeySequence()); #endif // delete layout while we still are a valid widget delete d->layout; // Remove myself from focus list Q_ASSERT(d->focus_next->d_func()->focus_prev == this); Q_ASSERT(d->focus_prev->d_func()->focus_next == this); if (d->focus_next != this) { d->focus_next->d_func()->focus_prev = d->focus_prev; d->focus_prev->d_func()->focus_next = d->focus_next; d->focus_next = d->focus_prev = 0; } #ifdef QT3_SUPPORT if (QApplicationPrivate::main_widget == this) { // reset main widget QApplicationPrivate::main_widget = 0; qApp->quit(); } #endif clearFocus(); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->setDirtyOpaqueRegion(); #endif if (isWindow() && isVisible() && internalWinId()) hide(); // set all QPointers for this object to zero QObjectPrivate::clearGuards(this); if (!d->children.isEmpty()) d->deleteChildren(); QApplication::removePostedEvents(this); destroy(); // platform-dependent cleanup --QWidgetPrivate::instanceCounter; if (QWidgetPrivate::uncreatedWidgets) // might have been deleted by ~QApplication QWidgetPrivate::uncreatedWidgets->remove(this); QEvent e(QEvent::Destroy); QCoreApplication::sendEvent(this, &e); } int QWidgetPrivate::instanceCounter = 0; // Current number of widget instances int QWidgetPrivate::maxInstances = 0; // Maximum number of widget instances void QWidgetPrivate::setWinId(WId id) // set widget identifier { Q_Q(QWidget); if (mapper && data.winid) { mapper->remove(data.winid); uncreatedWidgets->insert(q); } data.winid = id; #if defined(Q_WS_X11) hd = id; // X11: hd == ident #endif if (mapper && id) { mapper->insert(data.winid, q); uncreatedWidgets->remove(q); } } void QWidgetPrivate::createTLExtra() { if (!extra) createExtra(); if (!extra->topextra) { QTLWExtra* x = extra->topextra = new QTLWExtra; x->windowSurface = 0; x->opacity = 255; x->posFromMove = false; x->icon = 0; x->iconPixmap = 0; x->frameStrut.setCoords(0, 0, 0, 0); x->incw = x->inch = 0; x->basew = x->baseh = 0; x->normalGeometry = QRect(0,0,-1,-1); #if defined(Q_WS_X11) x->embedded = 0; x->parentWinId = 0; x->spont_unmapped = 0; x->dnd = 0; #endif x->savedFlags = 0; #if defined(Q_WS_QWS) x->inPaintTransaction = false; x->backingStore = 0; #if !defined(QT_NO_QWS_MANAGER) x->qwsManager = 0; #endif #endif createTLSysExtra(); #ifdef QWIDGET_EXTRA_DEBUG static int count = 0; qDebug() << "tlextra" << ++count; #endif } } /*! \internal Creates the widget extra data. */ void QWidgetPrivate::createExtra() { if (!extra) { // if not exists extra = new QWExtra; extra->minw = extra->minh = 0; extra->maxw = extra->maxh = QWIDGETSIZE_MAX; extra->explicitMinSize = 0; extra->autoFillBackground = 0; #ifndef QT_NO_CURSOR extra->curs = 0; #endif extra->style = 0; extra->topextra = 0; createSysExtra(); #ifdef QWIDGET_EXTRA_DEBUG static int count = 0; qDebug() << "extra" << ++count; #endif } } /*! \internal Deletes the widget extra data. */ void QWidgetPrivate::deleteExtra() { if (extra) { // if exists #ifndef QT_NO_CURSOR delete extra->curs; #endif deleteSysExtra(); if (extra->topextra) { deleteTLSysExtra(); delete extra->topextra->icon; delete extra->topextra->iconPixmap; #if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER) delete extra->topextra->qwsManager; #endif delete extra->topextra->windowSurface; delete extra->topextra; } delete extra; // extra->xic destroyed in QWidget::destroy() extra = 0; } } /* Returns true if the background is inherited; otherwise returns false. Mainly used in the paintOnScreen case. */ bool QWidgetPrivate::isBackgroundInherited() const { Q_Q(const QWidget); // windows do not inherit their background if (q->isWindow() || q->windowType() == Qt::SubWindow) return false; if (q->testAttribute(Qt::WA_NoSystemBackground) || q->testAttribute(Qt::WA_OpaquePaintEvent)) return false; const QPalette &pal = q->palette(); QPalette::ColorRole bg = q->backgroundRole(); QBrush brush = pal.brush(bg); // non opaque brushes leaves us no choice, we must inherit if (!q->autoFillBackground() || !brush.isOpaque()) return true; if (brush.style() == Qt::SolidPattern) { // the background is just a solid color. If there is no // propagated contents, then we claim as performance // optimization that it was not inheritet. This is the normal // case in standard Windows or Motif style. const QWidget *w = q->parentWidget(); if (!w->d_func()->isBackgroundInherited()) return false; } return true; } #ifndef Q_WS_MAC /* Returns true if there are widgets above this which overlap with \a rect, which is in parent's coordinate system (same as crect). */ bool QWidgetPrivate::isOverlapped(const QRect &rect) const { Q_Q(const QWidget); const QWidget *w = q; QRect r = rect; while (w) { if (w->isWindow()) return false; QWidgetPrivate *pd = w->parentWidget()->d_func(); bool above = false; for (int i = 0; i < pd->children.size(); ++i) { QWidget *sibling = qobject_cast(pd->children.at(i)); if (!sibling || !sibling->isVisible() || sibling->isWindow()) continue; if (!above) { above = (sibling == w); continue; } if (sibling->data->crect.intersects(r)) return true; } w = w->parentWidget(); r.translate(pd->data.crect.topLeft()); } return false; } #endif void QWidgetPrivate::setUpdatesEnabled_helper(bool enable) { Q_Q(QWidget); if (enable && !q->isWindow() && q->parentWidget() && !q->parentWidget()->updatesEnabled()) return; // nothing we can do if (enable != q->testAttribute(Qt::WA_UpdatesDisabled)) return; // nothing to do q->setAttribute(Qt::WA_UpdatesDisabled, !enable); if (enable) q->update(); Qt::WidgetAttribute attribute = enable ? Qt::WA_ForceUpdatesDisabled : Qt::WA_UpdatesDisabled; for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->isWindow() && !w->testAttribute(attribute)) w->d_func()->setUpdatesEnabled_helper(enable); } } void QWidgetPrivate::propagatePaletteChange() { Q_Q(QWidget); QEvent pc(QEvent::PaletteChange); QApplication::sendEvent(q, &pc); for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->testAttribute(Qt::WA_StyleSheet) && (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))) w->d_func()->resolvePalette(); } #if defined(QT3_SUPPORT) q->paletteChange(q->palette()); // compatibility #endif } /* Returns the widget's clipping rectangle. */ QRect QWidgetPrivate::clipRect() const { Q_Q(const QWidget); const QWidget * w = q; if (!w->isVisible()) return QRect(); QRect r = q->rect(); int ox = 0; int oy = 0; while (w && w->isVisible() && !w->isWindow() && w->parentWidget()) { ox -= w->x(); oy -= w->y(); w = w->parentWidget(); r &= QRect(ox, oy, w->width(), w->height()); } return r; } /* Returns the widget's clipping region (without siblings). */ QRegion QWidgetPrivate::clipRegion() const { Q_Q(const QWidget); if (!q->isVisible()) return QRegion(); QRegion r(q->rect()); const QWidget * w = q; const QWidget *ignoreUpTo; int ox = 0; int oy = 0; while (w && w->isVisible() && !w->isWindow() && w->parentWidget()) { ox -= w->x(); oy -= w->y(); ignoreUpTo = w; w = w->parentWidget(); r &= QRegion(ox, oy, w->width(), w->height()); int i = 0; while(w->d_func()->children.at(i++) != static_cast(ignoreUpTo)) ; for ( ; i < w->d_func()->children.size(); ++i) { if(QWidget *sibling = qobject_cast(w->d_func()->children.at(i))) { if(sibling->isVisible() && !sibling->isWindow()) { QRect siblingRect(ox+sibling->x(), oy+sibling->y(), sibling->width(), sibling->height()); if(siblingRect.intersects(q->rect())) r -= QRegion(siblingRect); } } } } return r; } #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS void QWidgetPrivate::setDirtyOpaqueRegion() { Q_Q(QWidget); dirtyOpaqueChildren = true; if (q->isWindow()) return; QWidget *parent = q->parentWidget(); if (!parent) return; // TODO: instead of setting dirtyflag, manipulate the dirtyregion directly? QWidgetPrivate *pd = parent->d_func(); if (!pd->dirtyOpaqueChildren) pd->setDirtyOpaqueRegion(); } QRegion QWidgetPrivate::getOpaqueRegion() const { Q_Q(const QWidget); QRegion r = isOpaque() ? q->rect() : getOpaqueChildren(); if (extra && !extra->mask.isEmpty()) r &= extra->mask; return r & clipRect(); } QRegion QWidgetPrivate::getOpaqueChildren() const { if (!dirtyOpaqueChildren) return opaqueChildren; QWidgetPrivate *that = const_cast(this); that->opaqueChildren = QRegion(); for (int i = 0; i < children.size(); ++i) { QWidget *child = qobject_cast(children.at(i)); if (!child || !child->isVisible() || child->isWindow()) continue; const QPoint offset = child->geometry().topLeft(); that->opaqueChildren += child->d_func()->getOpaqueRegion().translated(offset); } that->dirtyOpaqueChildren = false; return that->opaqueChildren; } // hw: currently disable opaque children cache. // Doesn't play nice with subtractOpaqueSiblings void QWidgetPrivate::subtractOpaqueChildren(QRegion &rgn, const QRegion &clipRgn, const QPoint &offset, int startIdx) const { Q_UNUSED(startIdx); const QRegion r = getOpaqueChildren(); if (!r.isEmpty()) rgn -= (r.translated(offset) & clipRgn); } //subtract any relatives that are higher up than me --- this is too expensive !!! void QWidgetPrivate::subtractOpaqueSiblings(QRegion &rgn, const QPoint &offset) const { static int disableSubtractOpaqueSiblings = qgetenv("QT_NO_SUBTRACTOPAQUESIBLINGS").toInt(); if (disableSubtractOpaqueSiblings) return; Q_Q(const QWidget); if (q->isWindow()) return; QPoint myOffset = offset - q->data->crect.topLeft(); const QWidgetPrivate *pd = q->parentWidget()->d_func(); pd->subtractOpaqueSiblings(rgn, myOffset); const int startIdx = pd->children.indexOf(const_cast(q)) + 1; for (int i = startIdx; i < pd->children.size(); ++i) { const QWidget *sibling = qobject_cast(pd->children.at(i)); if (!sibling || !sibling->isVisible() || sibling->isWindow()) continue; QRegion childRgn = sibling->geometry().translated(myOffset) & q->rect(); const QWidgetPrivate *sd = sibling->d_func(); sd->subtractOpaqueChildren(rgn, childRgn, myOffset + sibling->geometry().topLeft()); } } #else // Q_WIDGET_CACHE_OPAQUEREGIONS void QWidgetPrivate::subtractOpaqueChildren(QRegion &rgn, const QRegion &clipRgn, const QPoint &offset, int startIdx) const { for (int i=startIdx; i < children.size(); ++i) { if (QWidget *child = qobject_cast(children.at(i))) { if (child->isVisible() && !child->isWindow()) { QRegion childRgn = clipRgn & child->geometry().translated(offset); QWidgetPrivate *cd = child->d_func(); if (cd->extra && !cd->extra->mask.isEmpty()) childRgn &= cd->extra->mask.translated(offset + cd->data.crect.topLeft()); if (childRgn.isEmpty()) continue; if (cd->isOpaque()) rgn -= childRgn; else cd->subtractOpaqueChildren(rgn, childRgn, offset + child->geometry().topLeft()); } } } } //subtract any relatives that are higher up than me --- is this too expensive ??? void QWidgetPrivate::subtractOpaqueSiblings(QRegion &rgn, const QPoint &offset) const { static int disableSubtractOpaqueSiblings = qgetenv("QT_NO_SUBTRACTOPAQUESIBLINGS").toInt(); if (disableSubtractOpaqueSiblings) return; Q_Q(const QWidget); if (q->isWindow()) return; QPoint myOffset = offset - q->data->crect.topLeft(); const QWidgetPrivate *pd = q->parentWidget()->d_func(); pd->subtractOpaqueSiblings(rgn, myOffset); int idx = pd->children.indexOf(const_cast(q)) + 1; // argh, list is not compatible with const QObject* pd->subtractOpaqueChildren(rgn, q->rect(), myOffset, idx); } #endif // Q_WIDGET_CACHE_OPAQUEREGIONS bool QWidgetPrivate::hasBackground() const { Q_Q(const QWidget); if (!q->isWindow() && q->parentWidget() && q->parentWidget()->testAttribute(Qt::WA_PaintOnScreen)) return true; if (q->testAttribute(Qt::WA_PaintOnScreen)) return true; if (!q->testAttribute(Qt::WA_OpaquePaintEvent) && !q->testAttribute(Qt::WA_NoSystemBackground)) { const QPalette &pal = q->palette(); QPalette::ColorRole bg = q->backgroundRole(); QBrush bgBrush = pal.brush(bg); return (bgBrush.style() != Qt::NoBrush && ((q->isWindow() || q->windowType() == Qt::SubWindow) || (QPalette::ColorRole(bg_role) != QPalette::NoRole || (pal.resolve() & (1<testAttribute(Qt::WA_X11OpenGLOverlay)) return false; #endif if (q->testAttribute(Qt::WA_OpaquePaintEvent) || q->testAttribute(Qt::WA_PaintOnScreen)) return true; const QPalette &pal = q->palette(); if (q->autoFillBackground()) { const QBrush &autoFillBrush = pal.brush(q->backgroundRole()); if (autoFillBrush.style() != Qt::NoBrush && autoFillBrush.isOpaque()) { return true; } } if (q->isWindow() && !q->testAttribute(Qt::WA_NoSystemBackground)) { const QBrush &windowBrush = q->palette().brush(QPalette::Window); if (windowBrush.style() != Qt::NoBrush && windowBrush.isOpaque()) return true; } return false; } /*! \fn void QPixmap::fill(const QWidget *widget, const QPoint &offset) Fills the pixmap with the \a widget's background color or pixmap according to the given offset. The QPoint \a offset defines a point in widget coordinates to which the pixmap's top-left pixel will be mapped to. This is only significant if the widget has a background pixmap; otherwise the pixmap will simply be filled with the background color of the widget. */ void QPixmap::fill( const QWidget *widget, const QPoint &off ) { QPainter p(this); p.translate(-off); widget->d_func()->paintBackground(&p, QRect(off, size())); } void QWidgetPrivate::paintBackground(QPainter *painter, const QRect &rect, bool asRoot) const { #define FILL_RECT_WORKAROUND(painter, rect, brush) \ if (brush.style() == Qt::TexturePattern) \ painter->drawTiledPixmap(rect, brush.texture(), rect.topLeft()); \ else \ painter->fillRect(rect, brush); Q_Q(const QWidget); const QBrush autoFillBrush = q->palette().brush(q->backgroundRole()); if ((asRoot && !(q->autoFillBackground() && autoFillBrush.isOpaque()))) { const QBrush bg = q->palette().brush(QPalette::Window); #ifdef Q_WS_QWS if (painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff)) painter->setCompositionMode(QPainter::CompositionMode_Source); //copy alpha straight in #endif FILL_RECT_WORKAROUND(painter, rect, bg); } if (q->autoFillBackground()) { FILL_RECT_WORKAROUND(painter, rect, autoFillBrush); } if (q->testAttribute(Qt::WA_StyledBackground)) { QStyleOption opt; opt.initFrom(q); q->style()->drawPrimitive(QStyle::PE_Widget, &opt, painter, q); } } /*! \internal This function is called when a widget is hidden or destroyed. It resets some application global pointers that should only refer active, visible widgets. */ void QWidgetPrivate::deactivateWidgetCleanup() { Q_Q(QWidget); // If this was the active application window, reset it if (qApp->activeWindow() == q) qApp->setActiveWindow(0); // If the is the active mouse press widget, reset it #ifdef Q_WS_MAC extern QPointer qt_button_down; #else extern QWidget *qt_button_down; #endif if (q == qt_button_down) qt_button_down = 0; } /*! Returns a pointer to the widget with window identifer/handle \a id. The window identifier type depends on the underlying window system, see \c qwindowdefs.h for the actual definition. If there is no widget with this identifier, 0 is returned. */ QWidget *QWidget::find(WId id) { return QWidgetPrivate::mapper ? QWidgetPrivate::mapper->value(id, 0) : 0; } /*! \fn WId QWidget::internalWinId() const \internal Returns the window system identifier of the widget, or 0 if the widget is not created yet. */ /*! \fn WId QWidget::winId() const Returns the window system identifier of the widget. Portable in principle, but if you use it you are probably about to do something non-portable. Be careful. \sa find() */ WId QWidget::winId() const { if (!testAttribute(Qt::WA_WState_Created)) { QWidget *that = const_cast(this); that->d_func()->createWinId(); return that->data->winid; } return data->winid; } void QWidgetPrivate::createWinId(WId winid) { Q_Q(QWidget); if (!q->testAttribute(Qt::WA_WState_Created)) { if (!q->isWindow()) { QWidgetPrivate *pd = q->parentWidget()->d_func(); if (!q->parentWidget()->testAttribute(Qt::WA_WState_Created)) pd->createWinId(); for (int i = 0; i < pd->children.size(); ++i) { QWidget *w = qobject_cast(pd->children.at(i)); if (w && !w->isWindow() && !w->testAttribute(Qt::WA_WState_Created)) if (w!=q) { w->create(); } else { w->create(winid); // if the window has already been created, we // need to raise it to its proper stacking position if (winid) w->raise(); } } } else { q->create(); } } } /*! \internal Ensures that the widget has a window system identifier, i.e. that it is known to the windowing system. */ void QWidget::createWinId() { Q_D(QWidget); // qWarning("QWidget::createWinId is obsolete, please fix your code."); d->createWinId(); } #ifndef QT_NO_STYLE_STYLESHEET /*! \property QWidget::styleSheet \brief the widget's style sheet \since 4.2 The style sheet contains a textual description of customizations to the widget's style, as described in the \l{Qt Style Sheets} document. \sa setStyle(), QApplication::styleSheet, {Qt Style Sheets} */ QString QWidget::styleSheet() const { Q_D(const QWidget); if (!d->extra) return QString(); return d->extra->styleSheet; } void QWidget::setStyleSheet(const QString& styleSheet) { Q_D(QWidget); d->createExtra(); QStyleSheetStyle *proxy = qobject_cast(d->extra->style); d->extra->styleSheet = styleSheet; if (styleSheet.isEmpty()) { // stylesheet removed if (!proxy) return; d->inheritStyle(); return; } if (proxy) { // style sheet update proxy->repolish(this); return; } if (testAttribute(Qt::WA_SetStyle)) { d->setStyle_helper(new QStyleSheetStyle(d->extra->style), true); } else { d->setStyle_helper(new QStyleSheetStyle(0), true); } } #endif // QT_NO_STYLE_STYLESHEET /*! \sa QWidget::setStyle(), QApplication::setStyle(), QApplication::style() */ QStyle *QWidget::style() const { Q_D(const QWidget); if (d->extra && d->extra->style) return d->extra->style; return qApp->style(); } /*! Sets the widget's GUI style to \a style. The ownership of the style object is not transferred. If no style is set, the widget uses the application's style, QApplication::style() instead. Setting a widget's style has no effect on existing or future child widgets. \warning This function is particularly useful for demonstration purposes, where you want to show Qt's styling capabilities. Real applications should avoid it and use one consistent GUI style instead. \sa style(), QStyle, QApplication::style(), QApplication::setStyle() */ void QWidget::setStyle(QStyle *style) { Q_D(QWidget); setAttribute(Qt::WA_SetStyle, style != 0); d->createExtra(); #ifndef QT_NO_STYLE_STYLESHEET // if we have an application stylesheet or have a proxy already, propagate if (qobject_cast(d->extra->style) || !qApp->styleSheet().isEmpty()) d->setStyle_helper(new QStyleSheetStyle(style), true); else #endif d->setStyle_helper(style, false); } void QWidgetPrivate::setStyle_helper(QStyle *newStyle, bool propagate, bool #ifdef Q_WS_MAC metalHack #endif ) { Q_Q(QWidget); createExtra(); QStyle *oldStyle = q->style(); #ifndef QT_NO_STYLE_STYLESHEET QStyle *origStyle = extra->style; #endif extra->style = newStyle; // repolish if (q->windowType() != Qt::Desktop) { if (polished) { oldStyle->unpolish(q); #ifdef Q_WS_MAC if (metalHack) macUpdateMetalAttribute(); #endif q->style()->polish(q); #ifdef Q_WS_MAC } else if (metalHack) { macUpdateMetalAttribute(); #endif } } if (propagate) { for (int i = 0; i < children.size(); ++i) { QWidget *c = qobject_cast(children.at(i)); if (c) c->d_func()->inheritStyle(); } } QEvent e(QEvent::StyleChange); QApplication::sendEvent(q, &e); #ifdef QT3_SUPPORT q->styleChange(*oldStyle); #endif #ifndef QT_NO_STYLE_STYLESHEET // dereference the old stylesheet style if (QStyleSheetStyle *proxy = qobject_cast(origStyle)) proxy->deref(); #endif } // Inherits style from the current parent and propagates it as necessary void QWidgetPrivate::inheritStyle() { #ifndef QT_NO_STYLE_STYLESHEET Q_Q(QWidget); QStyleSheetStyle *proxy = extra ? qobject_cast(extra->style) : 0; if (!q->styleSheet().isEmpty()) { Q_ASSERT(proxy); proxy->repolish(q); return; } QStyle *origStyle = proxy ? proxy->base : (extra ? (QStyle*)extra->style : 0); QWidget *parent = q->parentWidget(); QStyle *parentStyle = (parent && parent->d_func()->extra) ? (QStyle*)parent->d_func()->extra->style : 0; // If we have stylesheet on app or parent has stylesheet style, we need // to be running a proxy if (!qApp->styleSheet().isEmpty() || qobject_cast(parentStyle)) { QStyle *newStyle = parentStyle; if (q->testAttribute(Qt::WA_SetStyle)) newStyle = new QStyleSheetStyle(origStyle); else if (QStyleSheetStyle *newProxy = qobject_cast(parentStyle)) newProxy->ref(); setStyle_helper(newStyle, true); return; } // So, we have no stylesheet on parent/app and we have an empty stylesheet // we just need our original style back if (origStyle == (extra ? (QStyle*)extra->style : 0)) // is it any different? return; // We could have inherited the proxy from our parent (which has a custom style) // In such a case we need to start following the application style (i.e revert // the propagation behavior of QStyleSheetStyle) if (!q->testAttribute(Qt::WA_SetStyle)) origStyle = 0; setStyle_helper(origStyle, true); #endif // QT_NO_STYLE_STYLESHEET } #ifdef QT3_SUPPORT /*! \overload Sets the widget's GUI style to \a style using the QStyleFactory. */ QStyle* QWidget::setStyle(const QString &style) { QStyle *s = QStyleFactory::create(style); setStyle(s); return s; } #endif /*! \fn bool QWidget::isWindow() const Returns true if the widget is an independent window, otherwise returns false. A window is a widget that isn't visually the child of any other widget and that usually has a frame and a \l{QWidget::setWindowTitle()}{window title}. A window can have a \l{QWidget::parentWidget()}{parent widget}. It will then be grouped with its parent and deleted when the parent is deleted, minimized when the parent is minimized etc. If supported by the window manager, it will also have a common taskbar entry with its parent. QDialog and QMainWindow widgets are by default windows, even if a parent widget is specified in the constructor. This behavior is specified by the Qt::Window flag. \sa window(), isModal(), parentWidget() */ /*! \property QWidget::modal \brief whether the widget is a modal widget This property only makes sense for windows. A modal widget prevents widgets in all other windows from getting any input. \sa isWindow(), windowModality, QDialog */ /*! \property QWidget::windowModality \brief which windows are blocked by the modal widget \since 4.1 This property only makes sense for windows. A modal widget prevents widgets in other windows from getting input. The value of this property controls which windows are blocked when the widget is visible. Changing this property while the window is visible has no effect; you must hide() the widget first, then show() it again. By default, this property is Qt::NonModal. \sa isWindow(), QWidget::modal, QDialog */ Qt::WindowModality QWidget::windowModality() const { return static_cast(data->window_modality); } void QWidget::setWindowModality(Qt::WindowModality windowModality) { data->window_modality = windowModality; // setModal_sys() will be called by setAttribute() setAttribute(Qt::WA_ShowModal, (data->window_modality != Qt::NonModal)); } /*! \fn bool QWidget::underMouse() const Returns true if the widget is under the mouse cursor; otherwise returns false. This value is not updated properly during drag and drop operations. \sa enterEvent(), leaveEvent() */ /*! \property QWidget::minimized \brief whether this widget is minimized (iconified) This property is only relevant for windows. \sa showMinimized(), visible, show(), hide(), showNormal(), maximized */ bool QWidget::isMinimized() const { return data->window_state & Qt::WindowMinimized; } /*! Shows the widget minimized, as an icon. Calling this function only affects \l{isWindow()}{windows}. \sa showNormal(), showMaximized(), show(), hide(), isVisible(), isMinimized() */ void QWidget::showMinimized() { bool isMin = isMinimized(); if (isMin && isVisible()) return; ensurePolished(); #ifdef QT3_SUPPORT if (parent()) QApplication::sendPostedEvents(parent(), QEvent::ChildInserted); #endif if (!isMin) setWindowState((windowState() & ~Qt::WindowActive) | Qt::WindowMinimized); show(); } /*! \property QWidget::maximized \brief whether this widget is maximized This property is only relevant for windows. Note that due to limitations in some window-systems, this does not always report the expected results (e.g. if the user on X11 maximizes the window via the window manager, Qt has no way of distinguishing this from any other resize). This is expected to improve as window manager protocols evolve. \sa windowState(), showMaximized(), visible, show(), hide(), showNormal(), minimized */ bool QWidget::isMaximized() const { return data->window_state & Qt::WindowMaximized; } /*! Returns the current window state. The window state is a OR'ed combination of Qt::WindowState: Qt::WindowMinimized, Qt::WindowMaximized, Qt::WindowFullScreen, and Qt::WindowActive. \sa Qt::WindowState setWindowState() */ Qt::WindowStates QWidget::windowState() const { return (Qt::WindowStates)data->window_state; } /*!\internal The function sets the window state on child widgets similar to setWindowState(). The difference is that the window state changed event has the isOverride() flag set. It exists mainly to keep Q3Workspace working. */ void QWidget::overrideWindowState(Qt::WindowStates newstate) { QWindowStateChangeEvent e((Qt::WindowStates)data->window_state, true); data->window_state = newstate; QApplication::sendEvent(this, &e); } /*! \fn void QWidget::setWindowState(Qt::WindowStates windowState) Sets the window state to \a windowState. The window state is a OR'ed combination of Qt::WindowState: Qt::WindowMinimized, Qt::WindowMaximized, Qt::WindowFullScreen, and Qt::WindowActive. If the window is not visible (i.e. isVisible() returns false), the window state will take effect when show() is called. For visible windows, the change is immediate. For example, to toggle between full-screen and mormal mode, use the following code: \code w->setWindowState(w->windowState() ^ Qt::WindowFullScreen); \endcode In order to restore and activate a minimized window (while preserving its maximized and/or full-screen state), use the following: \code w->setWindowState(w->windowState() & ~Qt::WindowMinimized | Qt::WindowActive); \endcode Note: On some window systems Qt::WindowActive is not immediate, and may be ignored in certain cases. When the window state changes, the widget receives a changeEvent() of type QEvent::WindowStateChange. \sa Qt::WindowState windowState() */ /*! \property QWidget::fullScreen \brief whether the widget is full screen \sa windowState(), minimized, maximized */ bool QWidget::isFullScreen() const { return data->window_state & Qt::WindowFullScreen; } /*! Shows the widget in full-screen mode. Calling this function only affects \l{isWindow()}{windows}. To return from full-screen mode, call showNormal(). Full-screen mode works fine under Windows, but has certain problems under X. These problems are due to limitations of the ICCCM protocol that specifies the communication between X11 clients and the window manager. ICCCM simply does not understand the concept of non-decorated full-screen windows. Therefore, the best we can do is to request a borderless window and place and resize it to fill the entire screen. Depending on the window manager, this may or may not work. The borderless window is requested using MOTIF hints, which are at least partially supported by virtually all modern window managers. An alternative would be to bypass the window manager entirely and create a window with the Qt::X11BypassWindowManagerHint flag. This has other severe problems though, like totally broken keyboard focus and very strange effects on desktop changes or when the user raises other windows. X11 window managers that follow modern post-ICCCM specifications support full-screen mode properly. \sa showNormal(), showMaximized(), show(), hide(), isVisible() */ void QWidget::showFullScreen() { ensurePolished(); #ifdef QT3_SUPPORT if (parent()) QApplication::sendPostedEvents(parent(), QEvent::ChildInserted); #endif setWindowState((windowState() & ~(Qt::WindowMinimized | Qt::WindowMaximized)) | Qt::WindowFullScreen); show(); activateWindow(); } /*! Shows the widget maximized. Calling this function only affects \l{isWindow()}{windows}. On X11, this function may not work properly with certain window managers. See \l{geometry.html}{Window Geometry} for an explanation. \sa setWindowState(), showNormal(), showMinimized(), show(), hide(), isVisible() */ void QWidget::showMaximized() { ensurePolished(); #ifdef QT3_SUPPORT if (parent()) QApplication::sendPostedEvents(parent(), QEvent::ChildInserted); #endif setWindowState((windowState() & ~(Qt::WindowMinimized | Qt::WindowFullScreen)) | Qt::WindowMaximized); show(); } /*! Restores the widget after it has been maximized or minimized. Calling this function only affects \l{isWindow()}{windows}. \sa setWindowState(), showMinimized(), showMaximized(), show(), hide(), isVisible() */ void QWidget::showNormal() { ensurePolished(); #ifdef QT3_SUPPORT if (parent()) QApplication::sendPostedEvents(parent(), QEvent::ChildInserted); #endif setWindowState(windowState() & ~(Qt::WindowMinimized | Qt::WindowMaximized | Qt::WindowFullScreen)); show(); } /*! Returns true if this widget would become enabled if \a ancestor is enabled; otherwise returns false. This is the case if neither the widget itself nor every parent up to but excluding \a ancestor has been explicitly disabled. isEnabledTo(0) is equivalent to isEnabled(). \sa setEnabled() enabled */ bool QWidget::isEnabledTo(QWidget* ancestor) const { const QWidget * w = this; while (w && !w->testAttribute(Qt::WA_ForceDisabled) && !w->isWindow() && w->parentWidget() && w->parentWidget() != ancestor) w = w->parentWidget(); return !w->testAttribute(Qt::WA_ForceDisabled); } #ifndef QT_NO_ACTION /*! Appends the action \a action to this widget's list of actions. All QWidgets have a list of \l{QAction}s, however they can be represented graphically in many different ways. The default use of the QAction list (as returned by actions()) is to create a context QMenu. A QWidget should only have one of each action. \sa removeAction(), insertAction(), actions(), QMenu */ void QWidget::addAction(QAction *action) { insertAction(0, action); } /*! Appends the actions \a actions to this widget's list of actions. \sa removeAction(), QMenu, addAction() */ void QWidget::addActions(QList actions) { for(int i = 0; i < actions.count(); i++) insertAction(0, actions.at(i)); } /*! Inserts the action \a action to this widget's list of actions, before the action \a before. It appends the action if \a before is 0 or \a before is not a valid action for this widget. A QWidget should only have one of each action. \sa removeAction(), addAction(), QMenu, contextMenuPolicy, actions() */ void QWidget::insertAction(QAction *before, QAction *action) { if(!action) { qWarning("QWidget::insertAction: Attempt to insert null action"); return; } Q_D(QWidget); if(d->actions.contains(action)) removeAction(action); int pos = d->actions.indexOf(before); if (pos < 0) { before = 0; pos = d->actions.size(); } d->actions.insert(pos, action); QActionPrivate *apriv = action->d_func(); apriv->widgets.append(this); QActionEvent e(QEvent::ActionAdded, action, before); QApplication::sendEvent(this, &e); } /*! Inserts the actions \a actions to this widget's list of actions, before the action \a before. It appends the action if \a before is 0 or \a before is not a valid action for this widget. A QWidget can have at most one of each action. \sa removeAction(), QMenu, insertAction(), contextMenuPolicy */ void QWidget::insertActions(QAction *before, QList actions) { for(int i = 0; i < actions.count(); ++i) insertAction(before, actions.at(i)); } /*! Removes the action \a action from this widget's list of actions. \sa insertAction(), actions(), insertAction() */ void QWidget::removeAction(QAction *action) { if (!action) return; Q_D(QWidget); QActionPrivate *apriv = action->d_func(); apriv->widgets.removeAll(this); if (d->actions.removeAll(action)) { QActionEvent e(QEvent::ActionRemoved, action); QApplication::sendEvent(this, &e); } } /*! Returns the (possibly empty) list of this widget's actions. \sa contextMenuPolicy, insertAction(), removeAction() */ QList QWidget::actions() const { Q_D(const QWidget); return d->actions; } #endif // QT_NO_ACTION /*! \fn bool QWidget::isEnabledToTLW() const \obsolete This function is deprecated. It is equivalent to isEnabled() */ /*! \property QWidget::enabled \brief whether the widget is enabled An enabled widget handles keyboard and mouse events; a disabled widget does not. Some widgets display themselves differently when they are disabled. For example a button might draw its label grayed out. If your widget needs to know when it becomes enabled or disabled, you can use the changeEvent() with type QEvent::EnabledChange. Disabling a widget implicitly disables all its children. Enabling respectively enables all child widgets unless they have been explicitly disabled. \sa isEnabledTo(), QKeyEvent, QMouseEvent, changeEvent() */ void QWidget::setEnabled(bool enable) { Q_D(QWidget); setAttribute(Qt::WA_ForceDisabled, !enable); d->setEnabled_helper(enable); } void QWidgetPrivate::setEnabled_helper(bool enable) { Q_Q(QWidget); if (enable && !q->isWindow() && q->parentWidget() && !q->parentWidget()->isEnabled()) return; // nothing we can do if (enable != q->testAttribute(Qt::WA_Disabled)) return; // nothing to do q->setAttribute(Qt::WA_Disabled, !enable); updateSystemBackground(); if (!enable && q->window()->focusWidget() == q) { bool parentIsEnabled = (!q->parentWidget() || q->parentWidget()->isEnabled()); if (!parentIsEnabled || !q->focusNextChild()) q->clearFocus(); } Qt::WidgetAttribute attribute = enable ? Qt::WA_ForceDisabled : Qt::WA_Disabled; for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->testAttribute(attribute)) w->d_func()->setEnabled_helper(enable); } #if defined(Q_WS_X11) if (q->testAttribute(Qt::WA_SetCursor) || q->isWindow()) { // enforce the windows behavior of clearing the cursor on // disabled widgets extern void qt_x11_enforce_cursor(QWidget * w); // defined in qwidget_x11.cpp qt_x11_enforce_cursor(q); } #endif #ifdef Q_WS_WIN QWinInputContext::enable(q, q->testAttribute(Qt::WA_InputMethodEnabled) && enable); #endif QEvent e(QEvent::EnabledChange); QApplication::sendEvent(q, &e); #ifdef QT3_SUPPORT q->enabledChange(!enable); // compatibility #endif } /*! \property QWidget::acceptDrops \brief whether drop events are enabled for this widget Setting this property to true announces to the system that this widget \e may be able to accept drop events. If the widget is the desktop (QWidget::(windowType() == Qt::Desktop)), this may fail if another application is using the desktop; you can call acceptDrops() to test if this occurs. \warning Do not modify this property in a Drag&Drop event handler. */ bool QWidget::acceptDrops() const { return testAttribute(Qt::WA_AcceptDrops); } void QWidget::setAcceptDrops(bool on) { setAttribute(Qt::WA_AcceptDrops, on); } /*! \fn void QWidget::enabledChange(bool) \internal \obsolete */ /*! \fn void QWidget::paletteChange(const QPalette &) \internal \obsolete */ /*! \fn void QWidget::fontChange(const QFont &) \internal \obsolete */ /*! \fn void QWidget::windowActivationChange(bool) \internal \obsolete */ /*! \fn void QWidget::languageChange() \obsolete */ /*! \fn void QWidget::styleChange(QStyle& style) \internal \obsolete */ /*! Disables widget input events if \a disable is true; otherwise enables input events. See the \l enabled documentation for more information. \sa isEnabledTo(), QKeyEvent, QMouseEvent, changeEvent() */ void QWidget::setDisabled(bool disable) { setEnabled(!disable); } /*! \property QWidget::frameGeometry \brief geometry of the widget relative to its parent including any window frame See the \link geometry.html Window Geometry documentation\endlink for an overview of geometry issues with windows. \sa geometry() x() y() pos() */ QRect QWidget::frameGeometry() const { Q_D(const QWidget); if (isWindow() && ! (windowType() == Qt::Popup)) { QRect fs = d->frameStrut(); return QRect(data->crect.x() - fs.left(), data->crect.y() - fs.top(), data->crect.width() + fs.left() + fs.right(), data->crect.height() + fs.top() + fs.bottom()); } return data->crect; } /*! \property QWidget::x \brief the x coordinate of the widget relative to its parent including any window frame See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa frameGeometry, y, pos */ int QWidget::x() const { Q_D(const QWidget); if (isWindow() && ! (windowType() == Qt::Popup)) return data->crect.x() - d->frameStrut().left(); return data->crect.x(); } /*! \property QWidget::y \brief the y coordinate of the widget relative to its parent and including any window frame See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa frameGeometry, x, pos */ int QWidget::y() const { Q_D(const QWidget); if (isWindow() && ! (windowType() == Qt::Popup)) return data->crect.y() - d->frameStrut().top(); return data->crect.y(); } /*! \property QWidget::pos \brief the position of the widget within its parent widget If the widget is a window, the position is that of the widget on the desktop, including its frame. When changing the position, the widget, if visible, receives a move event (moveEvent()) immediately. If the widget is not currently visible, it is guaranteed to receive an event before it is shown. \warning Calling move() or setGeometry() inside moveEvent() can lead to infinite recursion. See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa frameGeometry, size x(), y() */ QPoint QWidget::pos() const { Q_D(const QWidget); if (isWindow() && ! (windowType() == Qt::Popup)) { QRect fs = d->frameStrut(); return QPoint(data->crect.x() - fs.left(), data->crect.y() - fs.top()); } return data->crect.topLeft(); } /*! \property QWidget::geometry \brief the geometry of the widget relative to its parent and excluding the window frame When changing the geometry, the widget, if visible, receives a move event (moveEvent()) and/or a resize event (resizeEvent()) immediately. If the widget is not currently visible, it is guaranteed to receive appropriate events before it is shown. The size component is adjusted if it lies outside the range defined by minimumSize() and maximumSize(). \warning Calling setGeometry() inside resizeEvent() or moveEvent() can lead to infinite recursion. See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa frameGeometry(), rect(), move(), resize(), moveEvent(), resizeEvent(), minimumSize(), maximumSize() */ /*! \property QWidget::normalGeometry \brief the geometry of the widget as it will appear when shown as a normal (not maximized or fullscreen) toplevel widget For child widgets this property always holds an empty rect. \sa QWidget::windowState(), QWidget::geometry */ /*! \property QWidget::size \brief the size of the widget excluding any window frame If the widget is visible when it is being resized, it receives a resize event (resizeEvent()) immediately. If the widget is not currently visible, it is guaranteed to receive an event before it is shown. The size is adjusted if it lies outside the range defined by minimumSize() and maximumSize(). \warning Calling resize() or setGeometry() inside resizeEvent() can lead to infinite recursion. Note that setting size to QSize(0, 0) will cause the widget to not appear on screen. This also applies to windows. \sa pos, geometry, minimumSize, maximumSize, resizeEvent() */ /*! \property QWidget::width \brief the width of the widget excluding any window frame See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa geometry, height, size */ /*! \property QWidget::height \brief the height of the widget excluding any window frame See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa geometry, width, size */ /*! \property QWidget::rect \brief the internal geometry of the widget excluding any window frame The rect property equals QRect(0, 0, width(), height()). See the \link geometry.html Window Geometry documentation\endlink for an overview of window geometry. \sa size */ QRect QWidget::normalGeometry() const { Q_D(const QWidget); if (!d->extra || !d->extra->topextra) return QRect(); if (!isMaximized() && !isFullScreen()) return geometry(); return d->topData()->normalGeometry; } /*! \property QWidget::childrenRect \brief the bounding rectangle of the widget's children Hidden children are excluded. \sa childrenRegion() geometry() */ QRect QWidget::childrenRect() const { Q_D(const QWidget); QRect r(0, 0, 0, 0); for (int i = 0; i < d->children.size(); ++i) { QWidget *w = qobject_cast(d->children.at(i)); if (w && !w->isWindow() && !w->isHidden()) r |= w->geometry(); } return r; } /*! \property QWidget::childrenRegion \brief the combined region occupied by the widget's children Hidden children are excluded. \sa childrenRect() geometry() mask() */ QRegion QWidget::childrenRegion() const { Q_D(const QWidget); QRegion r; for (int i = 0; i < d->children.size(); ++i) { QWidget *w = qobject_cast(d->children.at(i)); if (w && !w->isWindow() && !w->isHidden()) { QRegion mask = w->mask(); if (mask.isEmpty()) r |= w->geometry(); else r |= mask.translated(w->pos()); } } return r; } /*! \property QWidget::minimumSize \brief the widget's minimum size The widget cannot be resized to a smaller size than the minimum widget size. The widget's size is forced to the minimum size if the current size is smaller. The minimum size set by this function will override the minimum size defined by QLayout. \sa minimumWidth, minimumHeight, maximumSize, sizeIncrement */ QSize QWidget::minimumSize() const { Q_D(const QWidget); return d->extra ? QSize(d->extra->minw, d->extra->minh) : QSize(0, 0); } /*! \property QWidget::maximumSize \brief the widget's maximum size The widget cannot be resized to a larger size than the maximum widget size. The property is limited by the QWIDGETSIZE_MAX macro, i.e. the largest allowed size is QSize(16777215, 16777215). \sa maximumWidth, maximumHeight, minimumSize, sizeIncrement */ QSize QWidget::maximumSize() const { Q_D(const QWidget); return d->extra ? QSize(d->extra->maxw, d->extra->maxh) : QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); } /*! \property QWidget::minimumWidth \brief the widget's minimum width This property corresponds to minimumSize().width(). \sa minimumSize, minimumHeight */ /*! \property QWidget::minimumHeight \brief the widget's minimum height This property corresponds to minimumSize().height(). \sa minimumSize, minimumWidth */ /*! \property QWidget::maximumWidth \brief the widget's maximum width This property corresponds to maximumSize().width(). It is limited by the QWIDGETSIZE_MAX macro, i.e. the largest allowed width is 16777215. \sa maximumSize, maximumHeight */ /*! \property QWidget::maximumHeight \brief the widget's maximum height This property corresponds to maximumSize().height(). It is limited by the QWIDGETSIZE_MAX macro, i.e. the largest allowed height is 16777215. \sa maximumSize, maximumWidth */ /*! \property QWidget::sizeIncrement \brief the size increment of the widget When the user resizes the window, the size will move in steps of sizeIncrement().width() pixels horizontally and sizeIncrement.height() pixels vertically, with baseSize() as the basis. Preferred widget sizes are for non-negative integers \e i and \e j: \code width = baseSize().width() + i * sizeIncrement().width(); height = baseSize().height() + j * sizeIncrement().height(); \endcode Note that while you can set the size increment for all widgets, it only affects windows. \warning The size increment has no effect under Windows, and may be disregarded by the window manager on X. \sa size, minimumSize, maximumSize */ QSize QWidget::sizeIncrement() const { Q_D(const QWidget); return (d->extra && d->extra->topextra) ? QSize(d->extra->topextra->incw, d->extra->topextra->inch) : QSize(0, 0); } /*! \property QWidget::baseSize \brief the base size of the widget The base size is used to calculate a proper widget size if the widget defines sizeIncrement(). \sa setSizeIncrement() */ QSize QWidget::baseSize() const { Q_D(const QWidget); return (d->extra != 0 && d->extra->topextra != 0) ? QSize(d->extra->topextra->basew, d->extra->topextra->baseh) : QSize(0, 0); } bool QWidgetPrivate::setMinimumSize_helper(int &minw, int &minh) { Q_Q(QWidget); #ifdef Q_WS_QWS if (q->isWindow()) { const QRect maxWindowRect = QApplication::desktop()->availableGeometry(QApplication::desktop()->screenNumber(q)); if (!maxWindowRect.isEmpty()) { // ### This is really just a work-around. Layout shouldn't be // asking for minimum sizes bigger than the screen. if (minw > maxWindowRect.width()) minw = maxWindowRect.width(); if (minh > maxWindowRect.height()) minh = maxWindowRect.height(); } } #endif if (minw > QWIDGETSIZE_MAX || minh > QWIDGETSIZE_MAX) { qWarning("QWidget::setMinimumSize: (%s/%s) " "The largest allowed size is (%d,%d)", q->objectName().toLocal8Bit().data(), q->metaObject()->className(), QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); minw = qMin(minw, QWIDGETSIZE_MAX); minh = qMin(minh, QWIDGETSIZE_MAX); } if (minw < 0 || minh < 0) { qWarning("QWidget::setMinimumSize: (%s/%s) Negative sizes (%d,%d) " "are not possible", q->objectName().toLocal8Bit().data(), q->metaObject()->className(), minw, minh); minw = qMax(minw, 0); minh = qMax(minh, 0); } createExtra(); if (extra->minw == minw && extra->minh == minh) return false; extra->minw = minw; extra->minh = minh; extra->explicitMinSize = (minw ? Qt::Horizontal : 0) | (minh ? Qt::Vertical : 0); return true; } /*! \overload This function corresponds to setMinimumSize(QSize(minw, minh)). Sets the minimum width to \a minw and the minimum height to \a minh. */ void QWidget::setMinimumSize(int minw, int minh) { Q_D(QWidget); if (!d->setMinimumSize_helper(minw, minh)) return; if (isWindow()) d->setConstraints_sys(); if (minw > width() || minh > height()) { bool resized = testAttribute(Qt::WA_Resized); bool maximized = isMaximized(); resize(qMax(minw,width()), qMax(minh,height())); setAttribute(Qt::WA_Resized, resized); //not a user resize if (maximized) data->window_state = data->window_state | Qt::WindowMaximized; } updateGeometry(); } bool QWidgetPrivate::setMaximumSize_helper(int &maxw, int &maxh) { Q_Q(QWidget); if (maxw > QWIDGETSIZE_MAX || maxh > QWIDGETSIZE_MAX) { qWarning("QWidget::setMaximumSize: (%s/%s) " "The largest allowed size is (%d,%d)", q->objectName().toLocal8Bit().data(), q->metaObject()->className(), QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); maxw = qMin(maxw, QWIDGETSIZE_MAX); maxh = qMin(maxh, QWIDGETSIZE_MAX); } if (maxw < 0 || maxh < 0) { qWarning("QWidget::setMaximumSize: (%s/%s) Negative sizes (%d,%d) " "are not possible", q->objectName().toLocal8Bit().data(), q->metaObject()->className(), maxw, maxh); maxw = qMax(maxw, 0); maxh = qMax(maxh, 0); } createExtra(); if (extra->maxw == maxw && extra->maxh == maxh) return false; extra->maxw = maxw; extra->maxh = maxh; return true; } /*! \overload This function corresponds to setMaximumSize(QSize(\a maxw, \a maxh)). Sets the maximum width to \a maxw and the maximum height to \a maxh. */ void QWidget::setMaximumSize(int maxw, int maxh) { Q_D(QWidget); if (!d->setMaximumSize_helper(maxw, maxh)) return; if (isWindow()) d->setConstraints_sys(); if (maxw < width() || maxh < height()) { bool resized = testAttribute(Qt::WA_Resized); resize(qMin(maxw,width()), qMin(maxh,height())); setAttribute(Qt::WA_Resized, resized); //not a user resize } updateGeometry(); } /*! \overload Sets the x (width) size increment to \a w and the y (height) size increment to \a h. */ void QWidget::setSizeIncrement(int w, int h) { Q_D(QWidget); d->createTLExtra(); QTLWExtra* x = d->topData(); if (x->incw == w && x->inch == h) return; x->incw = w; x->inch = h; if (isWindow()) d->setConstraints_sys(); } /*! \overload This corresponds to setBaseSize(QSize(\a basew, \a baseh)). Sets the widgets base size to width \a basew and height \a baseh. */ void QWidget::setBaseSize(int basew, int baseh) { Q_D(QWidget); d->createTLExtra(); QTLWExtra* x = d->topData(); if (x->basew == basew && x->baseh == baseh) return; x->basew = basew; x->baseh = baseh; if (isWindow()) d->setConstraints_sys(); } /*! Sets both the minimum and maximum sizes of the widget to \a s, thereby preventing it from ever growing or shrinking. This will override the default size constraints set by QLayout. Alternatively, if you want the widget to have a fixed size based on its contents, you can call QLayout::setSizeConstraint(QLayout::SetFixedSize); \sa maximumSize, minimumSize */ void QWidget::setFixedSize(const QSize & s) { setFixedSize(s.width(), s.height()); } /*! \fn void QWidget::setFixedSize(int w, int h) \overload Sets the width of the widget to \a w and the height to \a h. */ void QWidget::setFixedSize(int w, int h) { Q_D(QWidget); #ifdef Q_WS_QWS // temporary fix for 4.3.x. // Should move the embedded spesific contraints in setMinimumSize_helper into QLayout int tmpW = w; int tmpH = h; bool minSizeSet = d->setMinimumSize_helper(tmpW, tmpH); #else bool minSizeSet = d->setMinimumSize_helper(w, h); #endif bool maxSizeSet = d->setMaximumSize_helper(w, h); if (!minSizeSet && !maxSizeSet) return; if (isWindow()) d->setConstraints_sys(); resize(w, h); } void QWidget::setMinimumWidth(int w) { Q_D(QWidget); d->createExtra(); uint expl = d->extra->explicitMinSize | (w ? Qt::Horizontal : 0); setMinimumSize(w, minimumSize().height()); d->extra->explicitMinSize = expl; } void QWidget::setMinimumHeight(int h) { Q_D(QWidget); d->createExtra(); uint expl = d->extra->explicitMinSize | (h ? Qt::Vertical : 0); setMinimumSize(minimumSize().width(), h); d->extra->explicitMinSize = expl; } void QWidget::setMaximumWidth(int w) { setMaximumSize(w, maximumSize().height()); } void QWidget::setMaximumHeight(int h) { setMaximumSize(maximumSize().width(), h); } /*! Sets both the minimum and maximum width of the widget to \a w without changing the heights. Provided for convenience. \sa sizeHint() minimumSize() maximumSize() setFixedSize() */ void QWidget::setFixedWidth(int w) { Q_D(QWidget); d->createExtra(); uint expl = d->extra->explicitMinSize | Qt::Horizontal; setMinimumSize(w, minimumSize().height()); setMaximumSize(w, maximumSize().height()); d->extra->explicitMinSize = expl; } /*! Sets both the minimum and maximum heights of the widget to \a h without changing the widths. Provided for convenience. \sa sizeHint() minimumSize() maximumSize() setFixedSize() */ void QWidget::setFixedHeight(int h) { Q_D(QWidget); d->createExtra(); uint expl = d->extra->explicitMinSize | Qt::Vertical; setMinimumSize(minimumSize().width(), h); setMaximumSize(maximumSize().width(), h); d->extra->explicitMinSize = expl; } /*! Translates the widget coordinate \a pos to the coordinate system of \a parent. The \a parent must not be 0 and must be a parent of the calling widget. \sa mapFrom() mapToParent() mapToGlobal() underMouse() */ QPoint QWidget::mapTo(QWidget * parent, const QPoint & pos) const { QPoint p = pos; if (parent) { const QWidget * w = this; while (w != parent) { Q_ASSERT_X(w, "QWidget::mapTo(QWidget *parent, const QPoint &pos)", "parent must be in parent hierarchy"); p = w->mapToParent(p); w = w->parentWidget(); } } return p; } /*! Translates the widget coordinate \a pos from the coordinate system of \a parent to this widget's coordinate system. The \a parent must not be 0 and must be a parent of the calling widget. \sa mapTo() mapFromParent() mapFromGlobal() underMouse() */ QPoint QWidget::mapFrom(QWidget * parent, const QPoint & pos) const { QPoint p(pos); if (parent) { const QWidget * w = this; while (w != parent) { Q_ASSERT_X(w, "QWidget::mapFrom(QWidget *parent, const QPoint &pos)", "parent must be in parent hierarchy"); p = w->mapFromParent(p); w = w->parentWidget(); } } return p; } /*! Translates the widget coordinate \a pos to a coordinate in the parent widget. Same as mapToGlobal() if the widget has no parent. \sa mapFromParent() mapTo() mapToGlobal() underMouse() */ QPoint QWidget::mapToParent(const QPoint &pos) const { return pos + data->crect.topLeft(); } /*! Translates the parent widget coordinate \a pos to widget coordinates. Same as mapFromGlobal() if the widget has no parent. \sa mapToParent() mapFrom() mapFromGlobal() underMouse() */ QPoint QWidget::mapFromParent(const QPoint &pos) const { return pos - data->crect.topLeft(); } /*! Returns the window for this widget, i.e. the next ancestor widget that has (or could have) a window-system frame. If the widget is a window, the widget itself is returned. Typical usage is changing the window title: \code aWidget->window()->setWindowTitle("New Window Title"); \endcode \sa isWindow() */ QWidget *QWidget::window() const { QWidget *w = (QWidget *)this; QWidget *p = w->parentWidget(); while (!w->isWindow() && p) { w = p; p = p->parentWidget(); } return w; } /*! \fn QWidget *QWidget::topLevelWidget() const \obsolete Use window() instead. */ #ifdef QT3_SUPPORT /*! Returns the color role used for painting the widget's background. Use QPalette(backgroundRole(()) instead. */ Qt::BackgroundMode QWidget::backgroundMode() const { if (testAttribute(Qt::WA_NoSystemBackground)) return Qt::NoBackground; switch(backgroundRole()) { case QPalette::WindowText: return Qt::PaletteForeground; case QPalette::Button: return Qt::PaletteButton; case QPalette::Light: return Qt::PaletteLight; case QPalette::Midlight: return Qt::PaletteMidlight; case QPalette::Dark: return Qt::PaletteDark; case QPalette::Mid: return Qt::PaletteMid; case QPalette::Text: return Qt::PaletteText; case QPalette::BrightText: return Qt::PaletteBrightText; case QPalette::Base: return Qt::PaletteBase; case QPalette::Window: return Qt::PaletteBackground; case QPalette::Shadow: return Qt::PaletteShadow; case QPalette::Highlight: return Qt::PaletteHighlight; case QPalette::HighlightedText: return Qt::PaletteHighlightedText; case QPalette::ButtonText: return Qt::PaletteButtonText; case QPalette::Link: return Qt::PaletteLink; case QPalette::LinkVisited: return Qt::PaletteLinkVisited; default: break; } return Qt::NoBackground; } /*! \fn void QWidget::setBackgroundMode(Qt::BackgroundMode widgetBackground, Qt::BackgroundMode paletteBackground) Sets the color role used for painting the widget's background to background mode \a widgetBackground. The \a paletteBackground mode parameter is ignored. */ void QWidget::setBackgroundMode(Qt::BackgroundMode m, Qt::BackgroundMode) { Q_D(QWidget); if(m == Qt::NoBackground) { setAttribute(Qt::WA_NoSystemBackground, true); return; } setAttribute(Qt::WA_NoSystemBackground, false); d->fg_role = QPalette::NoRole; QPalette::ColorRole role = d->bg_role; switch(m) { case Qt::FixedColor: case Qt::FixedPixmap: break; case Qt::PaletteForeground: role = QPalette::WindowText; break; case Qt::PaletteButton: role = QPalette::Button; break; case Qt::PaletteLight: role = QPalette::Light; break; case Qt::PaletteMidlight: role = QPalette::Midlight; break; case Qt::PaletteDark: role = QPalette::Dark; break; case Qt::PaletteMid: role = QPalette::Mid; break; case Qt::PaletteText: role = QPalette::Text; break; case Qt::PaletteBrightText: role = QPalette::BrightText; break; case Qt::PaletteBase: role = QPalette::Base; break; case Qt::PaletteBackground: role = QPalette::Window; break; case Qt::PaletteShadow: role = QPalette::Shadow; break; case Qt::PaletteHighlight: role = QPalette::Highlight; break; case Qt::PaletteHighlightedText: role = QPalette::HighlightedText; break; case Qt::PaletteButtonText: role = QPalette::ButtonText; break; case Qt::PaletteLink: role = QPalette::Link; break; case Qt::PaletteLinkVisited: role = QPalette::LinkVisited; break; case Qt::X11ParentRelative: d->fg_role = role = QPalette::NoRole; default: break; } setBackgroundRole(role); } /*! The widget mapper is no longer part of the public API. */ QT3_SUPPORT QWidgetMapper *QWidget::wmapper() { return QWidgetPrivate::mapper; } #endif /*! Returns the background role of the widget. The background role defines the brush from the widget's \l palette that is used to render the background. If no explicit background role is set, the widget inherts its parent widget's background role. \sa setBackgroundRole(), foregroundRole() */ QPalette::ColorRole QWidget::backgroundRole() const { const QWidget *w = this; do { QPalette::ColorRole role = w->d_func()->bg_role; if (role != QPalette::NoRole) return role; if (w->isWindow() || w->windowType() == Qt::SubWindow) break; w = w->parentWidget(); } while (w); return QPalette::Window; } /*! Sets the background role of the widget to \a role. The background role defines the brush from the widget's \l palette that is used to render the background. If \a role is QPalette::NoRole, then the widget inherits its parent's background role. \sa backgroundRole(), foregroundRole() */ void QWidget::setBackgroundRole(QPalette::ColorRole role) { Q_D(QWidget); d->bg_role = role; d->updateSystemBackground(); d->propagatePaletteChange(); d->updateIsOpaque(); } /*! Returns the foreground role. The foreground role defines the color from the widget's \l palette that is used to draw the foreground. If no explicit foreground role is set, the function returns a role that contrasts with the background role. \sa setForegroundRole(), backgroundRole() */ QPalette::ColorRole QWidget::foregroundRole() const { Q_D(const QWidget); QPalette::ColorRole rl = QPalette::ColorRole(d->fg_role); if (rl != QPalette::NoRole) return rl; QPalette::ColorRole role = QPalette::WindowText; switch (backgroundRole()) { case QPalette::Button: role = QPalette::ButtonText; break; case QPalette::Base: role = QPalette::Text; break; case QPalette::Dark: case QPalette::Shadow: role = QPalette::Light; break; case QPalette::Highlight: role = QPalette::HighlightedText; break; default: ; } return role; } /*! Sets the foreground role of the widget to \a role. The foreground role defines the color from the widget's \l palette that is used to draw the foreground. If \a role is QPalette::NoRole, the widget uses a foreground role that contrasts with the background role. \sa foregroundRole(), backgroundRole() */ void QWidget::setForegroundRole(QPalette::ColorRole role) { Q_D(QWidget); d->fg_role = role; d->updateSystemBackground(); d->propagatePaletteChange(); } /*! \property QWidget::palette \brief the widget's palette As long as no special palette has been set, this is either a special palette for the widget class, the parent's palette or (if this widget is a top level widget), the default application palette. \bold{Note:} The palette's background color will only have an effect on the appearance of the widget if the \l autoFillBackground property is set. \warning Do not use this function in conjunction with \l{Qt Style Sheets}. When using style sheets, the palette of a widget can be customized using the "color", "background-color", "selection-color", "selection-background-color" and "alternate-background-color". \sa QApplication::palette() */ const QPalette &QWidget::palette() const { if (!isEnabled()) { data->pal.setCurrentColorGroup(QPalette::Disabled); } else if (!isVisible() || isActiveWindow()) { data->pal.setCurrentColorGroup(QPalette::Active); } else { #ifdef Q_WS_MAC extern bool qt_mac_can_clickThrough(const QWidget *); //qwidget_mac.cpp if (qt_mac_can_clickThrough(this)) data->pal.setCurrentColorGroup(QPalette::Active); else #endif data->pal.setCurrentColorGroup(QPalette::Inactive); } return data->pal; } void QWidget::setPalette(const QPalette &palette) { Q_D(QWidget); setAttribute(Qt::WA_SetPalette, palette.resolve() != 0); d->setPalette_helper(palette.resolve(qt_naturalWidgetPalette(this))); } void QWidgetPrivate::resolvePalette() { Q_Q(QWidget); setPalette_helper(data.pal.resolve(qt_naturalWidgetPalette(q))); } void QWidgetPrivate::setPalette_helper(const QPalette &palette) { Q_Q(QWidget); if (data.pal == palette && data.pal.resolve() == palette.resolve()) return; data.pal = palette; updateSystemBackground(); propagatePaletteChange(); updateIsOpaque(); q->update(); updateIsOpaque(); } /*! \property QWidget::font \brief the font currently set for the widget The fontInfo() function reports the actual font that is being used by the widget. As long as no special font has been set, or after setFont(QFont()) is called, this is either a special font for the widget class, the parent's font or (if this widget is a top level widget), the default application font. This code fragment sets a 12 point helvetica bold font: \code QFont font("Helvetica", 12, QFont::Bold); setFont(font); \endcode Note that when a child widget is given a different font to that of its parent widget, it will still inherit the parent's font \e properties unless these have been set explicitly on the child's font. For example, if the parent's font is bold, the child widget's font will be bold as well if not specified otherwise like this: \code QFont font; font.setBold(false); setFont(font); \endcode In addition to setting the font, setFont() informs all children about the change. \warning Do not use this function in conjunction with \l{Qt Style Sheets}. The font of a widget can be customized using the "font" style sheet property. \sa fontInfo() fontMetrics() */ void QWidget::setFont(const QFont &font) { Q_D(QWidget); setAttribute(Qt::WA_SetFont, font.resolve() != 0); d->setFont_helper(font.resolve(qt_naturalWidgetFont(this))); } void QWidgetPrivate::resolveFont() { Q_Q(QWidget); setFont_helper(data.fnt.resolve(qt_naturalWidgetFont(q))); } void QWidgetPrivate::setFont_helper(const QFont &font) { if (data.fnt == font && data.fnt.resolve() == font.resolve()) return; Q_Q(QWidget); #ifdef QT3_SUPPORT QFont old = data.fnt; #endif data.fnt = font; #if defined(Q_WS_X11) // make sure the font set on this widget is associated with the correct screen data.fnt.x11SetScreen(xinfo.screen()); #endif for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->testAttribute(Qt::WA_StyleSheet) && (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))) w->d_func()->resolveFont(); } QEvent e(QEvent::FontChange); QApplication::sendEvent(q, &e); #ifdef QT3_SUPPORT q->fontChange(old); #endif } void QWidgetPrivate::setLayoutDirection_helper(Qt::LayoutDirection direction) { Q_Q(QWidget); if ( (direction == Qt::RightToLeft) == q->testAttribute(Qt::WA_RightToLeft)) return; q->setAttribute(Qt::WA_RightToLeft, (direction == Qt::RightToLeft)); if (!children.isEmpty()) { for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->isWindow() && !w->testAttribute(Qt::WA_SetLayoutDirection)) w->d_func()->setLayoutDirection_helper(direction); } } QEvent e(QEvent::LayoutDirectionChange); QApplication::sendEvent(q, &e); } void QWidgetPrivate::resolveLayoutDirection() { Q_Q(const QWidget); if (!q->testAttribute(Qt::WA_SetLayoutDirection)) setLayoutDirection_helper(q->isWindow() ? QApplication::layoutDirection() : q->parentWidget()->layoutDirection()); } /*! \property QWidget::layoutDirection \brief the layout direction for this widget \sa QApplication::layoutDirection */ void QWidget::setLayoutDirection(Qt::LayoutDirection direction) { Q_D(QWidget); setAttribute(Qt::WA_SetLayoutDirection); d->setLayoutDirection_helper(direction); } Qt::LayoutDirection QWidget::layoutDirection() const { return testAttribute(Qt::WA_RightToLeft) ? Qt::RightToLeft : Qt::LeftToRight; } void QWidget::unsetLayoutDirection() { Q_D(QWidget); setAttribute(Qt::WA_SetLayoutDirection, false); d->resolveLayoutDirection(); } /*! \fn QFontMetrics QWidget::fontMetrics() const Returns the font metrics for the widget's current font. Equivalent to QFontMetrics(widget->font()). \sa font(), fontInfo(), setFont() */ /*! \fn QFontInfo QWidget::fontInfo() const Returns the font info for the widget's current font. Equivalent to QFontInto(widget->font()). \sa font(), fontMetrics(), setFont() */ /*! \property QWidget::cursor \brief the cursor shape for this widget The mouse cursor will assume this shape when it's over this widget. See the \link Qt::CursorShape list of predefined cursor objects\endlink for a range of useful shapes. An editor widget might use an I-beam cursor: \code setCursor(Qt::IBeamCursor); \endcode If no cursor has been set, or after a call to unsetCursor(), the parent's cursor is used. \sa QApplication::setOverrideCursor() */ #ifndef QT_NO_CURSOR QCursor QWidget::cursor() const { Q_D(const QWidget); if (testAttribute(Qt::WA_SetCursor)) return (d->extra && d->extra->curs) ? *d->extra->curs : QCursor(Qt::ArrowCursor); if (isWindow() || !parentWidget()) return QCursor(Qt::ArrowCursor); return parentWidget()->cursor(); } void QWidget::setCursor(const QCursor &cursor) { Q_D(QWidget); // On Mac we must set the cursor even if it is the ArrowCursor. #ifndef Q_WS_MAC if (cursor.shape() != Qt::ArrowCursor || (d->extra && d->extra->curs)) #endif { d->createExtra(); delete d->extra->curs; d->extra->curs = new QCursor(cursor); } setAttribute(Qt::WA_SetCursor); d->setCursor_sys(cursor); } void QWidget::unsetCursor() { Q_D(QWidget); if (d->extra) { delete d->extra->curs; d->extra->curs = 0; } if (!isWindow()) setAttribute(Qt::WA_SetCursor, false); d->unsetCursor_sys(); } #endif /*! \enum QWidget::RenderFlag This enum describes how to render the widget when calling QWidget::render(). \value DrawWindowBackground If you enable this option, the widget's background is rendered into the target even if autoFillBackground is not set. By default, this option is enabled. \value DrawChildren If you enable this option, the widget's children are rendered recursively into the target. By default, this option is enabled. \value IgnoreMask If you enable this option, the widget's QWidget::mask() is ignored when rendering into the target. By default, this option is disabled. \since 4.3 */ /*! Renders the \a sourceRegion of this widget into the \a target using \a renderFlags to determine how to render. Rendering starts at \a targetOffset in the \a target. For example: \code QPixmap pixmap(widget->size()); widget->render(&pixmap); \endcode If \a sourceRegion is a null region, this function will use QWidget::rect() as the region, i.e. the entire widget. \bold{Note:} Make sure to call QPainter::end() for the given \a target's active painter (if any) before rendering. For example: \code QPainter painter(this); ... painter.end(); myWidget->render(this); \endcode \since 4.3 */ void QWidget::render(QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, RenderFlags renderFlags) { Q_D(QWidget); if (!target) { qWarning("QWidget::render: null pointer to paint device"); return; } const QRect sourceRect = !sourceRegion.isEmpty() ? sourceRegion.boundingRect() : rect(); // Calculate the region to be painted. QRegion paintRegion = !sourceRegion.isEmpty() ? sourceRegion : QRegion(sourceRect); if (!(renderFlags & IgnoreMask) && d->extra && !d->extra->mask.isEmpty()) paintRegion &= d->extra->mask; if (paintRegion.isEmpty()) return; #ifdef Q_WS_MAC // Set system clip. QPaintEngine *paintEngine = target->paintEngine(); paintEngine->setSystemRect(data->crect.translated(targetOffset)); paintEngine->setSystemClip(paintRegion.translated(targetOffset)); // Render. d->render_helper(this, target, targetOffset, sourceRect, renderFlags); // Restore system clip. paintEngine->setSystemRect(QRect()); paintEngine->setSystemClip(QRegion()); #else // Set backingstore flags. int flags = QWidgetPrivate::DrawPaintOnScreen | QWidgetPrivate::DrawInvisible; if (renderFlags & DrawWindowBackground) flags |= QWidgetPrivate::DrawAsRoot; if (renderFlags & DrawChildren) flags |= QWidgetPrivate::DrawRecursive; else flags |= QWidgetPrivate::DontSubtractOpaqueChildren; // Use the target's redirected device if set and adjust offset and paint // region accordingly. This is typically the case when people call render // from the paintEvent. QPoint offset = targetOffset; QPoint redirectionOffset; QPaintDevice *redirected = QPainter::redirected(target, &redirectionOffset); if (redirected) { target = redirected; offset -= redirectionOffset; const QRegion redirectedSystemClip = redirected->paintEngine()->systemClip(); if (!redirectedSystemClip.isEmpty()) paintRegion &= redirectedSystemClip.translated(-offset); } // Render via backingstore. d->drawWidget(target, paintRegion, offset, flags); #endif } #ifdef Q_WS_MAC void QWidgetPrivate::render_helper(QWidget *widget, QPaintDevice *result, const QPoint &offset, const QRect &rect, QWidget::RenderFlags renderFlags) { // Draw the widget's background. if (widget->d_func()->hasBackground() && (renderFlags & QWidget::DrawWindowBackground) || widget->autoFillBackground()) { QPainter painter(result); painter.translate(-rect.topLeft() + offset); widget->d_func()->paintBackground(&painter, rect); } // Redirect all paint commands from the widget to the paint device and // tell the widget to repaint itself. QPainter::setRedirected(widget, result, rect.topLeft() - offset); QPaintEvent paintEvent(rect & widget->rect()); QApplication::sendEvent(widget, &paintEvent); QPainter::restoreRedirected(widget); if (!(renderFlags & QWidget::DrawChildren)) return; // Don't draw backgrounds for children. renderFlags &= ~QWidget::DrawWindowBackground; // Draw children recursively. const QObjectList children = widget->children(); for (int i = 0; i < children.size(); ++i) { QWidget *child = static_cast(children.at(i)); if (!child->isWidgetType() || child->isWindow() || child->isHidden() || !child->geometry().intersects(rect)) continue; QRect childRect = rect & child->geometry(); childRect.translate(-child->pos()); render_helper(child, result, offset + child->pos(), childRect, renderFlags); } } #endif /*! \property QWidget::locale \brief the widget's locale \since 4.3 As long as no special locale has been set, this is either the parent's locale or (if this widget is a top level widget), the default locale. If the widget displays dates or numbers, these should be formatted using the widget's locale. \sa QLocale QLocale::setDefault() */ void QWidgetPrivate::setLocale_helper(const QLocale &loc) { Q_Q(QWidget); if (locale == loc) return; locale = loc; if (!children.isEmpty()) { for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (!w) continue; if (w->testAttribute(Qt::WA_SetLocale)) continue; if (w->isWindow() && !w->testAttribute(Qt::WA_WindowPropagation)) continue; w->d_func()->setLocale_helper(loc); } } QEvent e(QEvent::LocaleChange); QApplication::sendEvent(q, &e); } void QWidget::setLocale(const QLocale &locale) { Q_D(QWidget); setAttribute(Qt::WA_SetLocale); d->setLocale_helper(locale); } QLocale QWidget::locale() const { Q_D(const QWidget); return d->locale; } void QWidgetPrivate::resolveLocale() { Q_Q(const QWidget); if (!q->testAttribute(Qt::WA_SetLocale)) { setLocale_helper(q->isWindow() ? QLocale() : q->parentWidget()->locale()); } } void QWidget::unsetLocale() { Q_D(QWidget); setAttribute(Qt::WA_SetLocale, false); d->resolveLocale(); } /*! \property QWidget::windowTitle \brief the window title (caption) This property only makes sense for windows. If no caption has been set, the title is an empty string. If you use the \l windowModified mechanism, the window title must contain a "[*]" placeholder, which indicates where the '*' should appear. Normally, it should appear right after the file name (e.g., "document1.txt[*] - Text Editor"). If the \l windowModified property is false (the default), the placeholder is simply removed. \sa windowIcon, windowIconText, windowModified */ QString QWidget::windowTitle() const { Q_D(const QWidget); return d->extra && d->extra->topextra ? d->extra->topextra->caption : QString(); } QString qt_setWindowTitle_helperHelper(const QString &title, QWidget *widget) { Q_ASSERT(widget); #ifdef QT_EVAL extern QString qt_eval_adapt_window_title(const QString &title); QString cap = qt_eval_adapt_window_title(title); #else QString cap = title; #endif QString placeHolder(QLatin1String("[*]")); int index = cap.indexOf(placeHolder); while (index != -1) { index += placeHolder.length(); int count = 1; while (cap.indexOf(placeHolder, index) == index) { ++count; index += placeHolder.length(); } if (count%2) { // odd number of [*] -> replace last one int lastIndex = cap.lastIndexOf(placeHolder, index - 1); if (widget->isWindowModified() && widget->style()->styleHint(QStyle::SH_TitleBar_ModifyNotification, 0, widget)) cap.replace(lastIndex, 3, QWidget::tr("*")); else cap.replace(lastIndex, 3, QLatin1String("")); } index = cap.indexOf(placeHolder, index); } cap.replace(QLatin1String("[*][*]"), QLatin1String("[*]")); return cap; } void QWidgetPrivate::setWindowTitle_helper(const QString &title) { Q_Q(QWidget); if (!q->testAttribute(Qt::WA_WState_Created)) createWinId(); setWindowTitle_sys(qt_setWindowTitle_helperHelper(title, q)); } void QWidgetPrivate::setWindowIconText_helper(const QString &title) { Q_Q(QWidget); if (q->testAttribute(Qt::WA_WState_Created)) setWindowIconText_sys(qt_setWindowTitle_helperHelper(title, q)); } void QWidget::setWindowIconText(const QString &iconText) { if (QWidget::windowIconText() == iconText) return; Q_D(QWidget); d->topData()->iconText = iconText; d->setWindowIconText_helper(iconText); QEvent e(QEvent::IconTextChange); QApplication::sendEvent(this, &e); } void QWidget::setWindowTitle(const QString &title) { if (QWidget::windowTitle() == title) return; Q_D(QWidget); d->topData()->caption = title; d->setWindowTitle_helper(title); QEvent e(QEvent::WindowTitleChange); QApplication::sendEvent(this, &e); } /*! \property QWidget::windowIcon \brief the widget's icon This property only makes sense for windows. If no icon has been set, windowIcon() returns the application icon (QApplication::windowIcon()). \sa windowIconText, windowTitle */ QIcon QWidget::windowIcon() const { const QWidget *w = this; while (w) { const QWidgetPrivate *d = w->d_func(); if (d->extra && d->extra->topextra && d->extra->topextra->icon) return *d->extra->topextra->icon; w = w->parentWidget(); } return qApp->windowIcon(); } void QWidgetPrivate::setWindowIcon_helper() { QEvent e(QEvent::WindowIconChange); QApplication::sendEvent(q_func(), &e); for (int i = 0; i < children.size(); ++i) { QWidget *w = qobject_cast(children.at(i)); if (w && !w->isWindow()) QApplication::sendEvent(w, &e); } } void QWidget::setWindowIcon(const QIcon &icon) { Q_D(QWidget); setAttribute(Qt::WA_SetWindowIcon, !icon.isNull()); d->createTLExtra(); if (!d->extra->topextra->icon) d->extra->topextra->icon = new QIcon(); *d->extra->topextra->icon = icon; delete d->extra->topextra->iconPixmap; d->extra->topextra->iconPixmap = 0; d->setWindowIcon_sys(); d->setWindowIcon_helper(); } /*! \property QWidget::windowIconText \brief the widget's icon text This property only makes sense for windows. If no icon text has been set, this functions returns an empty string. \sa windowIcon, windowTitle */ QString QWidget::windowIconText() const { Q_D(const QWidget); return (d->extra && d->extra->topextra) ? d->extra->topextra->iconText : QString(); } /*! Returns the window's role, or an empty string. \sa windowIcon, windowTitle */ QString QWidget::windowRole() const { Q_D(const QWidget); return (d->extra && d->extra->topextra) ? d->extra->topextra->role : QString(); } /*! Sets the window's role to \a role. This only makes sense for windows on X11. */ void QWidget::setWindowRole(const QString &role) { #if defined(Q_WS_X11) Q_D(QWidget); d->topData()->role = role; d->setWindowRole(role.toUtf8().constData()); #else Q_UNUSED(role) #endif } /*! \property QWidget::mouseTracking \brief whether mouse tracking is enabled for the widget If mouse tracking is disabled (the default), the widget only receives mouse move events when at least one mouse button is pressed while the mouse is being moved. If mouse tracking is enabled, the widget receives mouse move events even if no buttons are pressed. \sa mouseMoveEvent() */ /*! Sets the widget's focus proxy to widget \a w. If \a w is 0, the function resets this widget to have no focus proxy. Some widgets can "have focus", but create a child widget, such as QLineEdit, to actually handle the focus. In this case, the widget can set the line edit to be its focus proxy. setFocusProxy() sets the widget which will actually get focus when "this widget" gets it. If there is a focus proxy, setFocus() and hasFocus() operate on the focus proxy. \sa focusProxy() */ void QWidget::setFocusProxy(QWidget * w) { Q_D(QWidget); if (!w && !d->extra) return; for (QWidget* fp = w; fp; fp = fp->focusProxy()) { if (fp == this) { qWarning("QWidget: %s (%s) already in focus proxy chain", metaObject()->className(), objectName().toLocal8Bit().constData()); return; } } d->createExtra(); d->extra->focus_proxy = w; } /*! Returns the focus proxy, or 0 if there is no focus proxy. \sa setFocusProxy() */ QWidget * QWidget::focusProxy() const { Q_D(const QWidget); return d->extra ? (QWidget *)d->extra->focus_proxy : 0; } /*! \property QWidget::focus \brief whether this widget (or its focus proxy) has the keyboard input focus Effectively equivalent to \c {QApplication::focusWidget() == this}. \sa setFocus(), clearFocus(), setFocusPolicy(), QApplication::focusWidget() */ bool QWidget::hasFocus() const { const QWidget* w = this; while (w->d_func()->extra && w->d_func()->extra->focus_proxy) w = w->d_func()->extra->focus_proxy; return (QApplication::focusWidget() == w); } /*! Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the \link isActiveWindow() active window\endlink. The \a reason argument will be passed into any focus event sent from this function, it is used to give an explanation of what caused the widget to get focus. First, a focus out event is sent to the focus widget (if any) to tell it that it is about to lose the focus. Then a focus in event is sent to this widget to tell it that it just received the focus. (Nothing happens if the focus in and focus out widgets are the same.) setFocus() gives focus to a widget regardless of its focus policy, but does not clear any keyboard grab (see grabKeyboard()). Be aware that if the widget is hidden, it will not accept focus until it is shown. \warning If you call setFocus() in a function which may itself be called from focusOutEvent() or focusInEvent(), you may get an infinite recursion. \sa hasFocus() clearFocus() focusInEvent() focusOutEvent() setFocusPolicy() QApplication::focusWidget() grabKeyboard() grabMouse(), {Keyboard Focus} */ void QWidget::setFocus(Qt::FocusReason reason) { if (!isEnabled()) return; QWidget *f = this; while (f->d_func()->extra && f->d_func()->extra->focus_proxy) f = f->d_func()->extra->focus_proxy; if (QApplication::focusWidget() == f #if defined(Q_WS_WIN) && GetFocus() == f->internalWinId() #endif ) return; QWidget *w = f; if (isHidden()) { while (w && w->isHidden()) { w->d_func()->focus_child = f; w = w->isWindow() ? 0 : w->parentWidget(); } } else { while (w) { w->d_func()->focus_child = f; w = w->isWindow() ? 0 : w->parentWidget(); } } if (f->isActiveWindow()) { QApplicationPrivate::setFocusWidget(f, reason); #ifndef QT_NO_ACCESSIBILITY #if defined(Q_WS_WIN) if (!f->testAttribute(Qt::WA_WState_Created)) #endif QAccessible::updateAccessibility(f, 0, QAccessible::Focus); #endif } } /*! \fn void QWidget::setFocus() \overload Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the \l{isActiveWindow()}{active window}. */ /*! Takes keyboard input focus from the widget. If the widget has active focus, a \link focusOutEvent() focus out event\endlink is sent to this widget to tell it that it is about to lose the focus. This widget must enable focus setting in order to get the keyboard input focus, i.e. it must call setFocusPolicy(). \sa hasFocus(), setFocus(), focusInEvent(), focusOutEvent(), setFocusPolicy(), QApplication::focusWidget() */ void QWidget::clearFocus() { QWidget *w = this; while (w && w->d_func()->focus_child == this) { w->d_func()->focus_child = 0; w = w->parentWidget(); } if (hasFocus()) { QApplicationPrivate::setFocusWidget(0, Qt::OtherFocusReason); #if defined(Q_WS_WIN) if (!(windowType() == Qt::Popup) && GetFocus() == internalWinId()) SetFocus(0); else #endif { #ifndef QT_NO_ACCESSIBILITY QAccessible::updateAccessibility(this, 0, QAccessible::Focus); #endif } } } /*! \fn bool QWidget::focusNextChild() Finds a new widget to give the keyboard focus to, as appropriate for \key Tab, and returns true if it can find a new widget, or false if it can't. \sa focusPreviousChild() */ /*! \fn bool QWidget::focusPreviousChild() Finds a new widget to give the keyboard focus to, as appropriate for \key Shift+Tab, and returns true if it can find a new widget, or false if it can't. \sa focusNextChild() */ /*! Finds a new widget to give the keyboard focus to, as appropriate for Tab and Shift+Tab, and returns true if it can find a new widget, or false if it can't. If \a next is true, this function searches forward, if \a next is false, it searches backward. Sometimes, you will want to reimplement this function. For example, a web browser might reimplement it to move its "current active link" forward or backward, and call focusNextPrevChild() only when it reaches the last or first link on the "page". Child widgets call focusNextPrevChild() on their parent widgets, but only the window that contains the child widgets decides where to redirect focus. By reimplementing this function for an object, you thus gain control of focus traversal for all child widgets. \sa focusNextChild(), focusPreviousChild() */ bool QWidget::focusNextPrevChild(bool next) { QWidget* p = parentWidget(); bool isSubWindow = (windowType() == Qt::SubWindow); if (!isWindow() && !isSubWindow && p) return p->focusNextPrevChild(next); QWidget *w = QApplicationPrivate::focusNextPrevChild_helper(this, next); if (!w) return false; w->setFocus(next ? Qt::TabFocusReason : Qt::BacktabFocusReason); return true; } /*! Returns the last child of this widget that setFocus had been called on. For top level widgets this is the widget that will get focus in case this window gets activated This is not the same as QApplication::focusWidget(), which returns the focus widget in the currently active window. */ QWidget *QWidget::focusWidget() const { return const_cast(d_func()->focus_child); } /*! Returns the next widget in this widget's focus chain. */ QWidget *QWidget::nextInFocusChain() const { return const_cast(d_func()->focus_next); } /*! \property QWidget::isActiveWindow \brief whether this widget's window is the active window The active window is the window that contains the widget that has keyboard focus (The window may still have focus if it has no widgets or none of its widgets accepts keyboard focus). When popup windows are visible, this property is true for both the active window \e and for the popup. \sa activateWindow(), QApplication::activeWindow() */ bool QWidget::isActiveWindow() const { QWidget *tlw = window(); if(tlw == qApp->activeWindow() || (isVisible() && (tlw->windowType() == Qt::Popup))) return true; #ifdef Q_WS_MAC { //check process Boolean compare; ProcessSerialNumber current, front; GetCurrentProcess(¤t); GetFrontProcess(&front); if(SameProcess(¤t, &front, &compare) == noErr && !compare) return false; } extern bool qt_mac_is_macdrawer(const QWidget *); //qwidget_mac.cpp if(qt_mac_is_macdrawer(tlw) && tlw->parentWidget() && tlw->parentWidget()->isActiveWindow()) return true; #endif if(style()->styleHint(QStyle::SH_Widget_ShareActivation, 0, this)) { if(((tlw->windowType() == Qt::Dialog) || (tlw->windowType() == Qt::Tool)) && !tlw->isModal() && (!tlw->parentWidget() || tlw->parentWidget()->isActiveWindow())) return true; QWidget *w = qApp->activeWindow(); while(w && ((tlw->windowType() == Qt::Dialog) || (tlw->windowType() == Qt::Tool)) && !w->isModal() && w->parentWidget()) { w = w->parentWidget()->window(); if(w == tlw) return true; } } #if defined(Q_WS_WIN32) HWND active = GetActiveWindow(); if (!tlw->testAttribute(Qt::WA_WState_Created)) return false; return active == tlw->internalWinId() || ::IsChild(active, tlw->internalWinId()); #else return false; #endif } /*! Moves the \a second widget around the ring of focus widgets so that keyboard focus moves from the \a first widget to the \a second widget when the Tab key is pressed. Note that since the tab order of the \a second widget is changed, you should order a chain like this: \code setTabOrder(a, b); // a to b setTabOrder(b, c); // a to b to c setTabOrder(c, d); // a to b to c to d \endcode \e not like this: \code // WRONG setTabOrder(c, d); // c to d setTabOrder(a, b); // a to b AND c to d setTabOrder(b, c); // a to b to c, but not c to d \endcode If \a first or \a second has a focus proxy, setTabOrder() correctly substitutes the proxy. \sa setFocusPolicy(), setFocusProxy(), {Keyboard Focus} */ void QWidget::setTabOrder(QWidget* first, QWidget *second) { if (!first || !second || first->focusPolicy() == Qt::NoFocus || second->focusPolicy() == Qt::NoFocus) return; if (first->window() != second->window()) { qWarning("QWidget::setTabOrder: 'first' and 'second' must be in the same window"); return; } QWidget *fp = first->focusProxy(); if (fp) { // If first is redirected, set first to the last child of first // that can take keyboard focus so that second is inserted after // that last child, and the focus order within first is (more // likely to be) preserved. QList l = qFindChildren(first); for (int i = l.size()-1; i >= 0; --i) { QWidget * next = l.at(i); if (next->window() == fp->window()) { fp = next; if (fp->focusPolicy() != Qt::NoFocus) break; } } first = fp; } if (QWidget *sp = second->focusProxy()) second = sp; // QWidget *fp = first->d_func()->focus_prev; QWidget *fn = first->d_func()->focus_next; if (fn == second) return; QWidget *sp = second->d_func()->focus_prev; QWidget *sn = second->d_func()->focus_next; fn->d_func()->focus_prev = second; first->d_func()->focus_next = second; second->d_func()->focus_next = fn; second->d_func()->focus_prev = first; sp->d_func()->focus_next = sn; sn->d_func()->focus_prev = sp; Q_ASSERT(first->d_func()->focus_next->d_func()->focus_prev == first); Q_ASSERT(first->d_func()->focus_prev->d_func()->focus_next == first); Q_ASSERT(second->d_func()->focus_next->d_func()->focus_prev == second); Q_ASSERT(second->d_func()->focus_prev->d_func()->focus_next == second); } /*!\internal Moves the relevant subwidgets of this widget from the \a oldtlw's tab chain to that of the new parent, if there's anything to move and we're really moving This function is called from QWidget::reparent() *after* the widget has been reparented. \sa reparent() */ void QWidgetPrivate::reparentFocusWidgets(QWidget * oldtlw) { Q_Q(QWidget); if (oldtlw == q->window()) return; // nothing to do if(focus_child) focus_child->clearFocus(); // separate the focus chain into new (children of myself) and old (the rest) QWidget *firstOld = 0; //QWidget *firstNew = q; //invariant QWidget *o = 0; // last in the old list QWidget *n = q; // last in the new list bool prevWasNew = true; QWidget *w = focus_next; //Note: for efficiency, we do not maintain the list invariant inside the loop //we append items to the relevant list, and we optimize by not changing pointers //when subsequent items are going into the same list. while (w != q) { bool currentIsNew = q->isAncestorOf(w); if (currentIsNew) { if (!prevWasNew) { //prev was old -- append to new list n->d_func()->focus_next = w; w->d_func()->focus_prev = n; } n = w; } else { if (prevWasNew) { //prev was new -- append to old list, if there is one if (o) { o->d_func()->focus_next = w; w->d_func()->focus_prev = o; } else { // "create" the old list firstOld = w; } } o = w; } w = w->d_func()->focus_next; prevWasNew = currentIsNew; } //repair the old list: if (firstOld) { o->d_func()->focus_next = firstOld; firstOld->d_func()->focus_prev = o; } if (!q->isWindow()) { QWidget *topLevel = q->window(); //insert new chain into toplevel's chain QWidget *prev = topLevel->d_func()->focus_prev; topLevel->d_func()->focus_prev = n; prev->d_func()->focus_next = q; focus_prev = prev; n->d_func()->focus_next = topLevel; } else { //repair the new list n->d_func()->focus_next = q; focus_prev = n; } } /*!\internal Measures the shortest distance from a point to a rect. This function is called from QDesktopwidget::screen(QPoint) to find the closest screen for a point. */ int QWidgetPrivate::pointToRect(const QPoint &p, const QRect &r) { int dx = 0; int dy = 0; if (p.x() < r.left()) dx = r.left() - p.x(); else if (p.x() > r.right()) dx = p.x() - r.right(); if (p.y() < r.top()) dy = r.top() - p.y(); else if (p.y() > r.bottom()) dy = p.y() - r.bottom(); return dx + dy; } QRect QWidgetPrivate::fromOrToLayoutItemRect(const QRect &rect, int sign) const { QRect r = rect; r.adjust(-sign * leftLayoutItemMargin, -sign * topLayoutItemMargin, +sign * rightLayoutItemMargin, +sign * bottomLayoutItemMargin); return r; } /*! \property QWidget::frameSize \brief the size of the widget including any window frame */ QSize QWidget::frameSize() const { Q_D(const QWidget); if (isWindow() && !(windowType() == Qt::Popup)) { QRect fs = d->frameStrut(); return QSize(data->crect.width() + fs.left() + fs.right(), data->crect.height() + fs.top() + fs.bottom()); } return data->crect.size(); } /*! \fn void QWidget::move(int x, int y) \overload This corresponds to move(QPoint(\a x, \a y)). */ void QWidget::move(const QPoint &p) { Q_D(QWidget); setAttribute(Qt::WA_Moved); if (isWindow()) d->topData()->posFromMove = true; if (testAttribute(Qt::WA_WState_Created)) { d->setGeometry_sys(p.x() + geometry().x() - QWidget::x(), p.y() + geometry().y() - QWidget::y(), width(), height(), true); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->setDirtyOpaqueRegion(); #endif } else { data->crect.moveTopLeft(p); // no frame yet setAttribute(Qt::WA_PendingMoveEvent); } } /*! \fn void QWidget::resize(int w, int h) \overload This corresponds to resize(QSize(\a w, \a h)). */ void QWidget::resize(const QSize &s) { Q_D(QWidget); setAttribute(Qt::WA_Resized); if (testAttribute(Qt::WA_WState_Created)) { d->setGeometry_sys(geometry().x(), geometry().y(), s.width(), s.height(), false); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->setDirtyOpaqueRegion(); #endif } else { data->crect.setSize(s); setAttribute(Qt::WA_PendingResizeEvent); } } void QWidget::setGeometry(const QRect &r) { Q_D(QWidget); setAttribute(Qt::WA_Resized); setAttribute(Qt::WA_Moved); if (isWindow()) d->topData()->posFromMove = false; if (testAttribute(Qt::WA_WState_Created)) { d->setGeometry_sys(r.x(), r.y(), r.width(), r.height(), true); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->setDirtyOpaqueRegion(); #endif } else { data->crect = r; setAttribute(Qt::WA_PendingMoveEvent); setAttribute(Qt::WA_PendingResizeEvent); } } /*! \since 4.2 Saves the current geometry and state for top-level widgets. To save the geometry when the window closes, you can implement a close event like this: \code void MyWidget::closeEvent(QCloseEvent *event) { QSettings settings("MyCompany", "MyApp"); settings.setValue("geometry", saveGeometry()); QWidget::closeEvent(event); } \endcode See the \link geometry.html Window Geometry documentation\endlink for an overview of geometry issues with windows. \sa restoreGeometry() */ QByteArray QWidget::saveGeometry() const { QByteArray array; QDataStream stream(&array, QIODevice::WriteOnly); stream.setVersion(QDataStream::Qt_4_0); const quint32 magicNumber = 0x1D9D0CB; quint16 majorVersion = 1; quint16 minorVersion = 0; stream << magicNumber << majorVersion << minorVersion << frameGeometry() << normalGeometry() << qint32(QApplication::desktop()->screenNumber(this)) << quint8(windowState() & Qt::WindowMaximized) << quint8(windowState() & Qt::WindowFullScreen); return array; } /*! \since 4.2 Restores the geometry and state top-level widgets stored in the byte array \a geometry. Returns true on success; otherwise returns false. If the restored geometry is off-screen, it will be modified to be inside the the available screen geometry. To restore geometry saved using QSettings, you can use code like this: \code QSettings settings("MyCompany", "MyApp"); myWidget->restoreGeometry(settings.value("myWidget/geometry").toByteArray()); \endcode See the \link geometry.html Window Geometry documentation\endlink for an overview of geometry issues with windows. \sa saveGeometry(), QSettings */ bool QWidget::restoreGeometry(const QByteArray &geometry) { if (geometry.size() < 4) return false; QDataStream stream(geometry); stream.setVersion(QDataStream::Qt_4_0); const quint32 magicNumber = 0x1D9D0CB; quint32 storedMagicNumber; stream >> storedMagicNumber; if (storedMagicNumber != magicNumber) return false; const quint16 currentMajorVersion = 1; quint16 majorVersion = 0; quint16 minorVersion = 0; stream >> majorVersion >> minorVersion; if (majorVersion != currentMajorVersion) return false; // (Allow all minor versions.) QRect restoredFrameGeometry; QRect restoredNormalGeometry; qint32 restoredScreenNumber; quint8 maximized; quint8 fullScreen; stream >> restoredFrameGeometry >> restoredNormalGeometry >> restoredScreenNumber >> maximized >> fullScreen; const int frameHeight = 20; if (!restoredFrameGeometry.isValid()) restoredFrameGeometry = QRect(QPoint(0,0), sizeHint()); if (!restoredNormalGeometry.isValid()) restoredNormalGeometry = QRect(QPoint(0, frameHeight), sizeHint()); const QDesktopWidget * const desktop = QApplication::desktop(); if (restoredScreenNumber >= desktop->numScreens()) restoredScreenNumber = desktop->primaryScreen(); const QRect availableGeometry = desktop->availableGeometry(restoredScreenNumber); // Modify the restored geometry if we are about to restore to coordinates // that would make the window "lost". This happens if: // - The restored geometry is completely oustside the available geometry // - The title bar is outside the available geometry. // - (Mac only) The window is higher than the available geometry. It must // be possible to bring the size grip on screen by moving the window. #ifdef Q_WS_MAC restoredFrameGeometry.setHeight(qMin(restoredFrameGeometry.height(), availableGeometry.height())); restoredNormalGeometry.setHeight(qMin(restoredNormalGeometry.height(), availableGeometry.height() - frameHeight)); #endif if (!restoredFrameGeometry.intersects(availableGeometry)) { restoredFrameGeometry.moveBottom(qMin(restoredFrameGeometry.bottom(), availableGeometry.bottom())); restoredFrameGeometry.moveLeft(qMax(restoredFrameGeometry.left(), availableGeometry.left())); restoredFrameGeometry.moveRight(qMin(restoredFrameGeometry.right(), availableGeometry.right())); } restoredFrameGeometry.moveTop(qMax(restoredFrameGeometry.top(), availableGeometry.top())); if (!restoredNormalGeometry.intersects(availableGeometry)) { restoredNormalGeometry.moveBottom(qMin(restoredNormalGeometry.bottom(), availableGeometry.bottom())); restoredNormalGeometry.moveLeft(qMax(restoredNormalGeometry.left(), availableGeometry.left())); restoredNormalGeometry.moveRight(qMin(restoredNormalGeometry.right(), availableGeometry.right())); } restoredNormalGeometry.moveTop(qMax(restoredNormalGeometry.top(), availableGeometry.top() + frameHeight)); if (maximized || fullScreen) { setGeometry(restoredNormalGeometry); Qt::WindowStates ws = windowState(); if (maximized) ws |= Qt::WindowMaximized; if (fullScreen) ws |= Qt::WindowFullScreen; setWindowState(ws); } else { QPoint offset; #ifdef Q_WS_X11 if (isFullScreen()) offset = d_func()->topData()->fullScreenOffset; #endif setWindowState(windowState() & ~(Qt::WindowMaximized | Qt::WindowFullScreen)); move(restoredFrameGeometry.topLeft() + offset); resize(restoredNormalGeometry.size()); } return true; } /*!\fn void QWidget::setGeometry(int x, int y, int w, int h) \overload This corresponds to setGeometry(QRect(\a x, \a y, \a w, \a h)). */ /*! Sets the margins around the contents of the widget to have the sizes \a left, \a top, \a right, and \a bottom. The margins are used by the layout system, and may be used by subclasses to specify the area to draw in (e.g. excluding the frame). Changing the margins will trigger a resizeEvent(). \sa contentsRect(), getContentsMargins() */ void QWidget::setContentsMargins(int left, int top, int right, int bottom) { Q_D(QWidget); if (left == d->leftmargin && top == d->topmargin && right == d->rightmargin && bottom == d->bottommargin) return; d->leftmargin = left; d->topmargin = top; d->rightmargin = right; d->bottommargin = bottom; if (QLayout *l=d->layout) l->update(); //force activate; will do updateGeometry else updateGeometry(); // ###: compat, remove from Qt 5 if (isVisible()) { update(); QResizeEvent e(data->crect.size(), data->crect.size()); QApplication::sendEvent(this, &e); } else { setAttribute(Qt::WA_PendingResizeEvent, true); } QEvent e(QEvent::ContentsRectChange); QApplication::sendEvent(this, &e); } /*! Returns the widget's contents margins for \a left, \a top, \a right, and \a bottom. \sa setContentsMargins(), contentsRect() */ void QWidget::getContentsMargins(int *left, int *top, int *right, int *bottom) const { Q_D(const QWidget); if (left) *left = d->leftmargin; if (top) *top = d->topmargin; if (right) *right = d->rightmargin; if (bottom) *bottom = d->bottommargin; } /*! Returns the area inside the widget's margins. \sa setContentsMargins(), getContentsMargins() */ QRect QWidget::contentsRect() const { Q_D(const QWidget); return QRect(QPoint(d->leftmargin, d->topmargin), QPoint(data->crect.width() - 1 - d->rightmargin, data->crect.height() - 1 - d->bottommargin)); } /*! \fn void QWidget::customContextMenuRequested(const QPoint &pos) This signal is emitted when the widget's \l contextMenuPolicy is Qt::CustomContextMenu, and the user has requested a context menu on the widget. The position \a pos is the position of the context menu event that the widget receives. Normally this is in widget coordinates. The exception to this rule is QAbstractScrollArea and its subclasses that map the context menu event to coordinates of the \link QAbstractScrollArea::viewport() viewport() \endlink . \sa mapToGlobal() QMenu contextMenuPolicy */ /*! \property QWidget::contextMenuPolicy \brief how the widget shows a context menu The default value of this property is Qt::DefaultContextMenu, which means the contextMenuEvent() handler is called. Other values are Qt::NoContextMenu, Qt::PreventContextMenu, Qt::ActionsContextMenu, and Qt::CustomContextMenu. With Qt::CustomContextMenu, the signal customContextMenuRequested() is emitted. \sa contextMenuEvent(), customContextMenuRequested(), actions() */ Qt::ContextMenuPolicy QWidget::contextMenuPolicy() const { return (Qt::ContextMenuPolicy)data->context_menu_policy; } void QWidget::setContextMenuPolicy(Qt::ContextMenuPolicy policy) { data->context_menu_policy = (uint) policy; } /*! \property QWidget::focusPolicy \brief the way the widget accepts keyboard focus The policy is Qt::TabFocus if the widget accepts keyboard focus by tabbing, Qt::ClickFocus if the widget accepts focus by clicking, Qt::StrongFocus if it accepts both, and Qt::NoFocus (the default) if it does not accept focus at all. You must enable keyboard focus for a widget if it processes keyboard events. This is normally done from the widget's constructor. For instance, the QLineEdit constructor calls setFocusPolicy(Qt::StrongFocus). \sa focusInEvent(), focusOutEvent(), keyPressEvent(), keyReleaseEvent(), enabled */ Qt::FocusPolicy QWidget::focusPolicy() const { return (Qt::FocusPolicy)data->focus_policy; } void QWidget::setFocusPolicy(Qt::FocusPolicy policy) { data->focus_policy = (uint) policy; } /*! \property QWidget::updatesEnabled \brief whether updates are enabled An updates enabled widget receives paint events and has a system background; a disabled widget does not. This also implies that calling update() and repaint() has no effect if updates are disabled. setUpdatesEnabled() is normally used to disable updates for a short period of time, for instance to avoid screen flicker during large changes. In Qt, widgets normally do not generate screen flicker, but on X11 the server might erase regions on the screen when widgets get hidden before they can be replaced by other widgets. Disabling updates solves this. Example: \code setUpdatesEnabled(false); bigVisualChanges(); setUpdatesEnabled(true); \endcode Disabling a widget implicitly disables all its children. Enabling respectively enables all child widgets unless they have been explicitly disabled. Re-enabling updates implicitly calls update() on the widget. \sa paintEvent() */ void QWidget::setUpdatesEnabled(bool enable) { Q_D(QWidget); setAttribute(Qt::WA_ForceUpdatesDisabled, !enable); d->setUpdatesEnabled_helper(enable); } /*! \fn void QWidget::show() Shows the widget and its child widgets. This function is equivalent to setVisible(true). \sa showEvent(), hide(), setVisible(), showMinimized(), showMaximized(), showNormal(), isVisible() */ /*! \internal Makes the widget visible in the isVisible() meaning of the word. It is only called for toplevels or widgets with visible parents. */ void QWidgetPrivate::show_recursive() { Q_Q(QWidget); // polish if necessary if (!q->testAttribute(Qt::WA_WState_Created)) createRecursively(); q->ensurePolished(); #ifdef QT3_SUPPORT if(sendChildEvents) QApplication::sendPostedEvents(q, QEvent::ChildInserted); #endif if (!q->isWindow() && q->parentWidget()->d_func()->layout && !q->parentWidget()->data->in_show) q->parentWidget()->d_func()->layout->activate(); // activate our layout before we and our children become visible if (layout) layout->activate(); show_helper(); } void QWidgetPrivate::show_helper() { Q_Q(QWidget); data.in_show = true; // qws optimization // make sure we receive pending move and resize events if (q->testAttribute(Qt::WA_PendingMoveEvent)) { QMoveEvent e(data.crect.topLeft(), data.crect.topLeft()); QApplication::sendEvent(q, &e); q->setAttribute(Qt::WA_PendingMoveEvent, false); } if (q->testAttribute(Qt::WA_PendingResizeEvent)) { QResizeEvent e(data.crect.size(), QSize()); QApplication::sendEvent(q, &e); q->setAttribute(Qt::WA_PendingResizeEvent, false); } // become visible before showing all children q->setAttribute(Qt::WA_WState_Visible); // finally show all children recursively showChildren(false); #ifdef QT3_SUPPORT if (q->parentWidget() && sendChildEvents) QApplication::sendPostedEvents(q->parentWidget(), QEvent::ChildInserted); #endif // popup handling: new popups and tools need to be raised, and // existing popups must be closed. Also propagate the current // windows's KeyboardFocusChange status. if (q->isWindow()) { if ((q->windowType() == Qt::Tool) || (q->windowType() == Qt::Popup) || q->windowType() == Qt::ToolTip) { q->raise(); if (q->parentWidget() && q->parentWidget()->window()->testAttribute(Qt::WA_KeyboardFocusChange)) q->setAttribute(Qt::WA_KeyboardFocusChange); } else { while (QApplication::activePopupWidget()) { if (!QApplication::activePopupWidget()->close()) break; } } } // On Windows, show the popup now so that our own focus handling // stores the correct old focus widget even if it's stolen in the // showevent #if defined(Q_WS_WIN) if ((q->windowType() == Qt::Popup)) qApp->d_func()->openPopup(q); #endif // send the show event before showing the window QShowEvent showEvent; QApplication::sendEvent(q, &showEvent); if (q->isModal()) // QApplicationPrivate::enterModal *before* show, otherwise the initial // stacking might be wrong QApplicationPrivate::enterModal(q); show_sys(); #if !defined(Q_WS_WIN) if ((q->windowType() == Qt::Popup)) qApp->d_func()->openPopup(q); #endif #ifndef QT_NO_ACCESSIBILITY QAccessible::updateAccessibility(q, 0, QAccessible::ObjectShow); #endif if (QApplicationPrivate::hidden_focus_widget == q) { QApplicationPrivate::hidden_focus_widget = 0; q->setFocus(Qt::OtherFocusReason); } data.in_show = false; // reset qws optimization } /*! \fn void QWidget::hide() Hides the widget. This function is equivalent to setVisible(false). \sa hideEvent(), isHidden(), show(), setVisible(), isVisible(), close() */ /*!\internal */ void QWidgetPrivate::hide_helper() { Q_Q(QWidget); if ((q->windowType() == Qt::Popup)) qApp->d_func()->closePopup(q); // Move test modal here. Otherwise, a modal dialog could get // destroyed and we lose all access to its parent because we haven't // left modality. (Eg. modal Progress Dialog) if (q->isModal()) QApplicationPrivate::leaveModal(q); #if defined(Q_WS_WIN) if (q->isWindow() && !(q->windowType() == Qt::Popup) && q->parentWidget() && !q->parentWidget()->isHidden() && q->isActiveWindow()) q->parentWidget()->activateWindow(); // Activate parent #endif q->setAttribute(Qt::WA_Mapped, false); hide_sys(); bool wasVisible = q->testAttribute(Qt::WA_WState_Visible); if (wasVisible) { q->setAttribute(Qt::WA_WState_Visible, false); } QHideEvent hideEvent; QApplication::sendEvent(q, &hideEvent); hideChildren(false); // next bit tries to move the focus if the focus widget is now // hidden. if (wasVisible) { QWidget *fw = QApplication::focusWidget(); while (fw && !fw->isWindow()) { if (fw == q) { q->focusNextPrevChild(true); break; } fw = fw->parentWidget(); } } #ifdef Q_WIDGET_USE_DIRTYLIST QWidgetBackingStore *bs = maybeBackingStore(); if (bs) bs->removeDirtyWidget(q); #endif #ifndef QT_NO_ACCESSIBILITY if (wasVisible) QAccessible::updateAccessibility(q, 0, QAccessible::ObjectHide); #endif } /*! \fn bool QWidget::isHidden() const Returns true if the widget is hidden, otherwise returns false. A hidden widget will only become visible when show() is called on it. It will not be automatically shown when the parent is shown. To check visiblity, use !isVisible() instead (notice the exclamation mark). isHidden() implies !isVisible(), but a widget can be not visible and not hidden at the same time. This is the case for widgets that are children of widgets that are not visible. Widgets are hidden if they were created as independent windows or as children of visible widgets, or if hide() or setVisible(false) was called. */ void QWidget::setVisible(bool visible) { if (visible) { // show if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden)) return; Q_D(QWidget); // Designer uses a trick to make grabWidget work without showing if (!isWindow() && parentWidget() && parentWidget()->isVisible() && !parentWidget()->testAttribute(Qt::WA_WState_Created)) parentWidget()->window()->d_func()->createRecursively(); //we have to at least create toplevels before applyX11SpecificCommandLineArguments //but not children of non-visible parents QWidget *pw = parentWidget(); if (!testAttribute(Qt::WA_WState_Created) && (isWindow() || pw->testAttribute(Qt::WA_WState_Created))) { create(); } #if defined(Q_WS_X11) if (windowType() == Qt::Window) QApplicationPrivate::applyX11SpecificCommandLineArguments(this); #elif defined(Q_WS_QWS) if (windowType() == Qt::Window) QApplicationPrivate::applyQWSSpecificCommandLineArguments(this); #endif bool wasResized = testAttribute(Qt::WA_Resized); Qt::WindowStates initialWindowState = windowState(); // polish if necessary ensurePolished(); // remember that show was called explicitly setAttribute(Qt::WA_WState_ExplicitShowHide); // whether we need to inform the parent widget immediately bool needUpdateGeometry = !isWindow() && testAttribute(Qt::WA_WState_Hidden); // we are no longer hidden setAttribute(Qt::WA_WState_Hidden, false); if (needUpdateGeometry) updateGeometry(); #ifdef QT3_SUPPORT QApplication::sendPostedEvents(this, QEvent::ChildInserted); #endif // activate our layout before we and our children become visible if (d->layout) d->layout->activate(); if (!isWindow()) { QWidget *parent = parentWidget(); while (parent && parent->isVisible() && parent->d_func()->layout && !parent->data->in_show) { parent->d_func()->layout->activate(); if (parent->isWindow()) break; parent = parent->parentWidget(); } #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS if (parent && !d->getOpaqueRegion().isEmpty()) parent->d_func()->setDirtyOpaqueRegion(); #endif } // adjust size if necessary if (!wasResized && (isWindow() || !parentWidget()->d_func()->layout)) { if (isWindow()) { adjustSize(); if (windowState() != initialWindowState) setWindowState(initialWindowState); } else { adjustSize(); } setAttribute(Qt::WA_Resized, false); } setAttribute(Qt::WA_KeyboardFocusChange, false); if (isWindow() || parentWidget()->isVisible()) d->show_helper(); QEvent showToParentEvent(QEvent::ShowToParent); QApplication::sendEvent(this, &showToParentEvent); } else { // hide if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden)) return; if (QApplicationPrivate::hidden_focus_widget == this) QApplicationPrivate::hidden_focus_widget = 0; Q_D(QWidget); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS if (!isWindow() && parentWidget() && !d->getOpaqueRegion().isEmpty()) parentWidget()->d_func()->setDirtyOpaqueRegion(); #endif setAttribute(Qt::WA_WState_Hidden); setAttribute(Qt::WA_WState_ExplicitShowHide); if (testAttribute(Qt::WA_WState_Created)) d->hide_helper(); // invalidate layout similar to updateGeometry() if (!isWindow() && parentWidget()) { if (parentWidget()->d_func()->layout) parentWidget()->d_func()->layout->update(); else if (parentWidget()->isVisible()) QApplication::postEvent(parentWidget(), new QEvent(QEvent::LayoutRequest)); } QEvent hideToParentEvent(QEvent::HideToParent); QApplication::sendEvent(this, &hideToParentEvent); } } /*!\fn void QWidget::setHidden(bool hidden) Convenience function, equivalent to setVisible(!\a hidden). */ /*!\fn void QWidget::setShown(bool shown) Use setVisible(\a shown) instead. */ void QWidgetPrivate::_q_showIfNotHidden() { Q_Q(QWidget); if ( !(q->isHidden() && q->testAttribute(Qt::WA_WState_ExplicitShowHide)) ) q->setVisible(true); } void QWidgetPrivate::showChildren(bool spontaneous) { QList childList = children; for (int i = 0; i < childList.size(); ++i) { QWidget *widget = qobject_cast(childList.at(i)); if (!widget || widget->isWindow() || widget->testAttribute(Qt::WA_WState_Hidden)) continue; if (spontaneous) { widget->setAttribute(Qt::WA_Mapped); widget->d_func()->showChildren(true); QShowEvent e; QApplication::sendSpontaneousEvent(widget, &e); } else { if (widget->testAttribute(Qt::WA_WState_ExplicitShowHide)) widget->d_func()->show_recursive(); else widget->show(); } } } void QWidgetPrivate::hideChildren(bool spontaneous) { QList childList = children; for (int i = 0; i < childList.size(); ++i) { QWidget *widget = qobject_cast(childList.at(i)); if (!widget || widget->isWindow() || widget->testAttribute(Qt::WA_WState_Hidden)) continue; if (spontaneous) widget->setAttribute(Qt::WA_Mapped, false); else widget->setAttribute(Qt::WA_WState_Visible, false); widget->d_func()->hideChildren(spontaneous); QHideEvent e; if (spontaneous) QApplication::sendSpontaneousEvent(widget, &e); else QApplication::sendEvent(widget, &e); #ifndef QT_NO_ACCESSIBILITY if (!spontaneous) QAccessible::updateAccessibility(widget, 0, QAccessible::ObjectHide); #endif } } bool QWidgetPrivate::close_helper(CloseMode mode) { if (data.is_closing) return true; Q_Q(QWidget); data.is_closing = 1; QPointer that = q; QPointer parentWidget = q->parentWidget(); #ifdef QT3_SUPPORT bool isMain = (QApplicationPrivate::main_widget == q); #endif bool quitOnClose = q->testAttribute(Qt::WA_QuitOnClose); if (mode != CloseNoEvent) { QCloseEvent e; if (mode == CloseWithSpontaneousEvent) QApplication::sendSpontaneousEvent(q, &e); else QApplication::sendEvent(q, &e); if (!that.isNull() && !e.isAccepted()) { data.is_closing = 0; return false; } } if (!that.isNull() && !q->isHidden()) q->hide(); #ifdef QT3_SUPPORT if (isMain) qApp->quit(); #endif // Attempt to close the application only if this has WA_QuitOnClose set and a non-visible parent quitOnClose = quitOnClose && (parentWidget.isNull() || !parentWidget->isVisible()); if (quitOnClose && QApplication::instance()->d_func()->in_exec && !QApplicationPrivate::tryEmitLastWindowClosedPending) { // QApplicationPrivate::_q_tryEmitLastWindowClosed will check if all windows have been closed, // emitting QApplication::lastWindowClosed() if necessary QApplicationPrivate::tryEmitLastWindowClosedPending = true; QMetaObject::invokeMethod(QApplication::instance(), "_q_tryEmitLastWindowClosed", Qt::QueuedConnection); } if (!that.isNull()) { data.is_closing = 0; if (q->testAttribute(Qt::WA_DeleteOnClose)) { q->setAttribute(Qt::WA_DeleteOnClose, false); q->deleteLater(); } } return true; } /*! Closes this widget. Returns true if the widget was closed; otherwise returns false. First it sends the widget a QCloseEvent. The widget is \link hide() hidden\endlink if it \link QCloseEvent::accept() accepts\endlink the close event. If it \link QCloseEvent::ignore() ignores\endlink the event, nothing happens. The default implementation of QWidget::closeEvent() accepts the close event. If the widget has the Qt::WA_DeleteOnClose flag, the widget is also deleted. A close events is delivered to the widget no matter if the widget is visible or not. The \l QApplication::lastWindowClosed() signal is emitted when the last visible primary window (i.e. window with no parent) with the Qt::WA_QuitOnClose attribute set is closed. By default this attribute is set for all widgets except transient windows such as splash screens, tool windows, and popup menus. */ bool QWidget::close() { return d_func()->close_helper(QWidgetPrivate::CloseWithEvent); } /*! \property QWidget::visible \brief whether the widget is visible Calling setVisible(true) or show() sets the widget to visible status if all its parent widgets up to the window are visible. If an ancestor is not visible, the widget won't become visible until all its ancestors are shown. If its size or position has changed, Qt guarantees that a widget gets move and resize events just before it is shown. If the widget has not been resized yet, Qt will adjust the widget's size to a useful default using adjustSize(). Calling setVisible(false) or hide() hides a widget explicitly. An explicitly hidden widget will never become visible, even if all its ancestors become visible, unless you show it. A widget receives show and hide events when its visibility status changes. Between a hide and a show event, there is no need to waste CPU cycles preparing or displaying information to the user. A video application, for example, might simply stop generating new frames. A widget that happens to be obscured by other windows on the screen is considered to be visible. The same applies to iconified windows and windows that exist on another virtual desktop (on platforms that support this concept). A widget receives spontaneous show and hide events when its mapping status is changed by the window system, e.g. a spontaneous hide event when the user minimizes the window, and a spontaneous show event when the window is restored again. You almost never have to reimplement the setVisible() function. If you need to change some settings before a widget is shown, use showEvent() instead. If you need to do some delayed initialization use the Polish event delivered to the event() function. \sa show(), hide(), isHidden(), isVisibleTo(), isMinimized(), showEvent(), hideEvent() */ /*! Returns true if this widget would become visible if \a ancestor is shown; otherwise returns false. The true case occurs if neither the widget itself nor any parent up to but excluding \a ancestor has been explicitly hidden. This function will still return true if the widget is obscured by other windows on the screen, but could be physically visible if it or they were to be moved. isVisibleTo(0) is identical to isVisible(). \sa show() hide() isVisible() */ bool QWidget::isVisibleTo(QWidget* ancestor) const { if (!ancestor) return isVisible(); const QWidget * w = this; while (w && !w->isHidden() && !w->isWindow() && w->parentWidget() && w->parentWidget() != ancestor) w = w->parentWidget(); return !w->isHidden(); } #ifdef QT3_SUPPORT /*! Use visibleRegion() instead. */ QRect QWidget::visibleRect() const { return d_func()->clipRect(); } #endif /*! Returns the unobscured region where paint events can occur. For visible widgets, this is an approximation of the area not covered by other widgets; otherwise, this is an empty region. The repaint() function calls this function if necessary, so in general you do not need to call it. */ QRegion QWidget::visibleRegion() const { Q_D(const QWidget); QRegion r = d->clipRect(); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->subtractOpaqueChildren(r, r, QPoint()); // d->subtractOpaqueSiblings(r, r, QPoint()); // XXX: enable when caching is implemented #endif #ifdef Q_WS_QWS const QWSWindowSurface *surface = static_cast(windowSurface()); if (surface) { const QPoint offset = mapTo(surface->window(), QPoint()); r &= surface->clipRegion().translated(-offset); } #endif return r; } /*! Adjusts the size of the widget to fit the contents. Uses sizeHint() if valid (i.e if the size hint's width and height are \>= 0); otherwise sets the size to the children rectangle that covers all child widgets (the union of all child widget rectangles). For top-level widgets, the screen size is also taken into account. \sa sizeHint(), childrenRect() */ void QWidget::adjustSize() { ensurePolished(); QSize s = sizeHint(); if (isWindow()) { Qt::Orientations exp; if (QLayout *l = layout()) { if (l->hasHeightForWidth()) s.setHeight(l->totalHeightForWidth(s.width())); exp = l->expandingDirections(); } else { if (sizePolicy().hasHeightForWidth()) s.setHeight(heightForWidth(s.width())); exp = sizePolicy().expandingDirections(); } if (exp & Qt::Horizontal) s.setWidth(qMax(s.width(), 200)); if (exp & Qt::Vertical) s.setHeight(qMax(s.height(), 100)); #if defined(Q_WS_X11) QRect screen = QApplication::desktop()->screenGeometry(x11Info().screen()); #else // all others QRect screen = QApplication::desktop()->screenGeometry(pos()); #endif s.setWidth(qMin(s.width(), screen.width()*2/3)); s.setHeight(qMin(s.height(), screen.height()*2/3)); } if (!s.isValid()) { QRect r = childrenRect(); // get children rectangle if (r.isNull()) return; s = r.size() + QSize(2 * r.x(), 2 * r.y()); } resize(s); } /*! \property QWidget::sizeHint \brief the recommended size for the widget If the value of this property is an invalid size, no size is recommended. The default implementation of sizeHint() returns an invalid size if there is no layout for this widget, and returns the layout's preferred size otherwise. \sa QSize::isValid(), minimumSizeHint(), sizePolicy(), setMinimumSize(), updateGeometry() */ QSize QWidget::sizeHint() const { Q_D(const QWidget); if (d->layout) return d->layout->totalSizeHint(); return QSize(-1, -1); } /*! \property QWidget::minimumSizeHint \brief the recommended minimum size for the widget If the value of this property is an invalid size, no minimum size is recommended. The default implementation of minimumSizeHint() returns an invalid size if there is no layout for this widget, and returns the layout's minimum size otherwise. Most built-in widgets reimplement minimumSizeHint(). \l QLayout will never resize a widget to a size smaller than the minimum size hint unless minimumSize() is set or the size policy is set to QSizePolicy::Ignore. If minimumSize() is set, the minimum size hint will be ignored. \sa QSize::isValid(), resize(), setMinimumSize(), sizePolicy() */ QSize QWidget::minimumSizeHint() const { Q_D(const QWidget); if (d->layout) return d->layout->totalMinimumSize(); return QSize(-1, -1); } /*! \fn QWidget *QWidget::parentWidget() const Returns the parent of this widget, or 0 if it does not have any parent widget. */ /*! Returns true if this widget is a parent, (or grandparent and so on to any level), of the given \a child, and both widgets are within the same window; otherwise returns false. */ bool QWidget::isAncestorOf(const QWidget *child) const { while (child) { if (child == this) return true; if (child->isWindow()) return false; child = child->parentWidget(); } return false; } /***************************************************************************** QWidget event handling *****************************************************************************/ /*! This is the main event handler; it handles event \a event. You can reimplement this function in a subclass, but we recommend using one of the specialized event handlers instead. Key press and release events are treated differently from other events. event() checks for Tab and Shift+Tab and tries to move the focus appropriately. If there is no widget to move the focus to (or the key press is not Tab or Shift+Tab), event() calls keyPressEvent(). Mouse and tablet event handling is also slightly special: only when the widget is \l enabled, event() will call the specialized handlers such as mousePressEvent(); otherwise it will discard the event. This function returns true if the event was recognized, otherwise it returns false. If the recognized event was accepted (see \l QEvent::accepted), any further processing such as event propagation to the parent widget stops. \sa closeEvent(), focusInEvent(), focusOutEvent(), enterEvent(), keyPressEvent(), keyReleaseEvent(), leaveEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), moveEvent(), paintEvent(), resizeEvent(), QObject::event(), QObject::timerEvent() */ bool QWidget::event(QEvent *event) { Q_D(QWidget); // ignore mouse events when disabled if (!isEnabled()) { switch(event->type()) { case QEvent::TabletPress: case QEvent::TabletRelease: case QEvent::TabletMove: case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: case QEvent::MouseMove: case QEvent::ContextMenu: #ifndef QT_NO_WHEELEVENT case QEvent::Wheel: #endif return false; default: break; } } switch (event->type()) { #ifdef Q_RATE_LIMIT_PAINTING case QEvent::Timer: { QTimerEvent *timerEvent = static_cast(event); if (timerEvent->timerId() == d->timerId) { killTimer(d->timerId); QWidgetBackingStore *bs = d->maybeBackingStore(); if (bs) bs->updateDirtyRegion(this); d->timerId = -1; } else { this->timerEvent(timerEvent); } break; } #endif case QEvent::MouseMove: mouseMoveEvent((QMouseEvent*)event); break; case QEvent::MouseButtonPress: // Don't reset input context here. Whether reset or not is // a responsibility of input method. reset() will be // called by mouseHandler() of input method if necessary // via mousePressEvent() of text widgets. #if 0 resetInputContext(); #endif mousePressEvent((QMouseEvent*)event); break; case QEvent::MouseButtonRelease: mouseReleaseEvent((QMouseEvent*)event); break; case QEvent::MouseButtonDblClick: mouseDoubleClickEvent((QMouseEvent*)event); break; #ifndef QT_NO_WHEELEVENT case QEvent::Wheel: wheelEvent((QWheelEvent*)event); break; #endif #ifndef QT_NO_TABLETEVENT case QEvent::TabletMove: case QEvent::TabletPress: case QEvent::TabletRelease: tabletEvent((QTabletEvent*)event); break; #endif #ifdef QT3_SUPPORT case QEvent::Accel: event->ignore(); return false; #endif case QEvent::KeyPress: { QKeyEvent *k = (QKeyEvent *)event; bool res = false; if (!(k->modifiers() & (Qt::ControlModifier | Qt::AltModifier))) { if (k->key() == Qt::Key_Backtab || (k->key() == Qt::Key_Tab && (k->modifiers() & Qt::ShiftModifier))) res = focusNextPrevChild(false); else if (k->key() == Qt::Key_Tab) res = focusNextPrevChild(true); if (res) break; } keyPressEvent(k); #ifdef QT_KEYPAD_NAVIGATION if (!k->isAccepted() && QApplication::keypadNavigationEnabled() && !(k->modifiers() & (Qt::ControlModifier | Qt::AltModifier | Qt::ShiftModifier))) { if (k->key() == Qt::Key_Up) res = focusNextPrevChild(false); else if (k->key() == Qt::Key_Down) res = focusNextPrevChild(true); if (res) { k->accept(); break; } } #endif #ifndef QT_NO_WHATSTHIS if (!k->isAccepted() && k->modifiers() & Qt::ShiftModifier && k->key() == Qt::Key_F1 && d->whatsThis.size()) { QWhatsThis::showText(mapToGlobal(inputMethodQuery(Qt::ImMicroFocus).toRect().center()), d->whatsThis, this); k->accept(); } #endif } break; case QEvent::KeyRelease: keyReleaseEvent((QKeyEvent*)event); // fall through case QEvent::ShortcutOverride: break; case QEvent::InputMethod: inputMethodEvent((QInputMethodEvent *) event); break; case QEvent::PolishRequest: ensurePolished(); break; case QEvent::Polish: { style()->polish(this); setAttribute(Qt::WA_WState_Polished); if (!testAttribute(Qt::WA_SetFont) && !QApplication::font(this).isCopyOf(QApplication::font())) d->resolveFont(); if (!QApplication::palette(this).isCopyOf(QApplication::palette())) d->resolvePalette(); #ifdef QT3_SUPPORT if(d->sendChildEvents) QApplication::sendPostedEvents(this, QEvent::ChildInserted); #endif } break; case QEvent::ApplicationWindowIconChange: if (isWindow() && !testAttribute(Qt::WA_SetWindowIcon)) { d->setWindowIcon_sys(); d->setWindowIcon_helper(); } break; case QEvent::FocusIn: focusInEvent((QFocusEvent*)event); break; case QEvent::FocusOut: focusOutEvent((QFocusEvent*)event); break; case QEvent::Enter: #ifndef QT_NO_STATUSTIP if (d->statusTip.size()) { QStatusTipEvent tip(d->statusTip); QApplication::sendEvent(const_cast(this), &tip); } #endif enterEvent(event); break; case QEvent::Leave: #ifndef QT_NO_STATUSTIP if (d->statusTip.size()) { QString empty; QStatusTipEvent tip(empty); QApplication::sendEvent(const_cast(this), &tip); } #endif leaveEvent(event); break; case QEvent::HoverEnter: case QEvent::HoverLeave: update(); break; case QEvent::Paint: // At this point the event has to be delivered, regardless // whether the widget isVisible() or not because it // already went through the filters paintEvent((QPaintEvent*)event); break; case QEvent::Move: moveEvent((QMoveEvent*)event); break; case QEvent::Resize: resizeEvent((QResizeEvent*)event); break; case QEvent::Close: closeEvent((QCloseEvent *)event); break; case QEvent::ContextMenu: switch (data->context_menu_policy) { case Qt::PreventContextMenu: break; case Qt::DefaultContextMenu: contextMenuEvent(static_cast(event)); break; case Qt::CustomContextMenu: emit customContextMenuRequested(static_cast(event)->pos()); break; #ifndef QT_NO_MENU case Qt::ActionsContextMenu: if (d->actions.count()) { QMenu::exec(d->actions, static_cast(event)->globalPos()); break; } // fall through #endif default: event->ignore(); break; } break; #ifndef QT_NO_DRAGANDDROP case QEvent::Drop: dropEvent((QDropEvent*) event); break; case QEvent::DragEnter: dragEnterEvent((QDragEnterEvent*) event); break; case QEvent::DragMove: dragMoveEvent((QDragMoveEvent*) event); break; case QEvent::DragLeave: dragLeaveEvent((QDragLeaveEvent*) event); break; #endif case QEvent::Show: showEvent((QShowEvent*) event); break; case QEvent::Hide: hideEvent((QHideEvent*) event); break; case QEvent::ShowWindowRequest: if (!isHidden()) d->show_sys(); break; case QEvent::ApplicationFontChange: d->resolveFont(); break; case QEvent::ApplicationPaletteChange: if (!(windowType() == Qt::Desktop)) d->resolvePalette(); break; case QEvent::ToolBarChange: case QEvent::ActivationChange: case QEvent::EnabledChange: case QEvent::FontChange: case QEvent::StyleChange: case QEvent::PaletteChange: case QEvent::WindowTitleChange: case QEvent::IconTextChange: case QEvent::ModifiedChange: case QEvent::MouseTrackingChange: case QEvent::ParentChange: case QEvent::WindowStateChange: case QEvent::LocaleChange: case QEvent::MacSizeChange: case QEvent::ContentsRectChange: changeEvent(event); break; case QEvent::WindowActivate: case QEvent::WindowDeactivate: { #ifdef QT3_SUPPORT windowActivationChange(event->type() != QEvent::WindowActivate); #endif if (isVisible() && !palette().isEqual(QPalette::Active, QPalette::Inactive)) update(); QList childList = d->children; for (int i = 0; i < childList.size(); ++i) { QWidget *w = qobject_cast(childList.at(i)); if (w && w->isVisible() && !w->isWindow()) QApplication::sendEvent(w, event); } break; } case QEvent::LanguageChange: #ifdef QT3_SUPPORT languageChange(); #endif changeEvent(event); { QList childList = d->children; for (int i = 0; i < childList.size(); ++i) { QObject *o = childList.at(i); QApplication::sendEvent(o, event); } } update(); break; case QEvent::ApplicationLayoutDirectionChange: d->resolveLayoutDirection(); break; case QEvent::LayoutDirectionChange: if (d->layout) d->layout->invalidate(); update(); changeEvent(event); break; #if defined(Q_WS_X11) || defined(Q_WS_QWS) || (defined(Q_WS_WIN) && defined(Q_WIN_USE_QT_UPDATE_EVENT)) case QEvent::UpdateRequest: { #ifndef Q_WS_WIN extern void qt_syncBackingStore(QWidget *widget); #endif qt_syncBackingStore(this); break; } #endif case QEvent::UpdateLater: update(static_cast(event)->region()); break; case QEvent::WindowBlocked: case QEvent::WindowUnblocked: { QList childList = d->children; for (int i = 0; i < childList.size(); ++i) { QObject *o = childList.at(i); if (o != qApp->activeModalWidget()) { if (qobject_cast(o) && static_cast(o)->isWindow()) { // do not forward the event to child windows, // QApplication does this for us continue; } QApplication::sendEvent(o, event); } } } break; #ifndef QT_NO_TOOLTIP case QEvent::ToolTip: if (!d->toolTip.isEmpty()) QToolTip::showText(static_cast(event)->globalPos(), d->toolTip, this); else event->ignore(); break; #endif #ifndef QT_NO_WHATSTHIS case QEvent::WhatsThis: if (d->whatsThis.size()) QWhatsThis::showText(static_cast(event)->globalPos(), d->whatsThis, this); else event->ignore(); break; case QEvent::QueryWhatsThis: if (d->whatsThis.isEmpty()) event->ignore(); break; #endif #ifndef QT_NO_ACCESSIBILITY case QEvent::AccessibilityDescription: case QEvent::AccessibilityHelp: { QAccessibleEvent *ev = static_cast(event); if (ev->child()) return false; switch (ev->type()) { #ifndef QT_NO_TOOLTIP case QEvent::AccessibilityDescription: ev->setValue(d->toolTip); break; #endif #ifndef QT_NO_WHATSTHIS case QEvent::AccessibilityHelp: ev->setValue(d->whatsThis); break; #endif default: return false; } break; } #endif case QEvent::EmbeddingControl: d->topData()->frameStrut.setCoords(0 ,0, 0, 0); data->fstrut_dirty = false; break; #ifndef QT_NO_ACTION case QEvent::ActionAdded: case QEvent::ActionRemoved: case QEvent::ActionChanged: actionEvent((QActionEvent*)event); break; #endif case QEvent::KeyboardLayoutChange: { changeEvent(event); // inform children of the change QList childList = d->children; for (int i = 0; i < childList.size(); ++i) { QWidget *w = qobject_cast(childList.at(i)); if (w && w->isVisible() && !w->isWindow()) QApplication::sendEvent(w, event); } break; } default: return QObject::event(event); } return true; } /*! This event handler can be reimplemented to handle state changes. The state being changed in this event can be retrieved through event \a event. Change events include: QEvent::ToolBarChange, QEvent::ActivationChange, QEvent::EnabledChange, QEvent::FontChange, QEvent::StyleChange, QEvent::PaletteChange, QEvent::WindowTitleChange, QEvent::IconTextChange, QEvent::ModifiedChange, QEvent::MouseTrackingChange, QEvent::ParentChange, QEvent::WindowStateChange, QEvent::LanguageChange, QEvent::LocaleChange, QEvent::LayoutDirectionChange. */ void QWidget::changeEvent(QEvent * event) { switch(event->type()) { case QEvent::EnabledChange: update(); #ifndef QT_NO_ACCESSIBILITY QAccessible::updateAccessibility(this, 0, QAccessible::StateChanged); #endif break; case QEvent::FontChange: case QEvent::StyleChange: { update(); updateGeometry(); #ifdef Q_WS_QWS Q_D(QWidget); if (isWindow()) d->data.fstrut_dirty = true; #endif break; } case QEvent::PaletteChange: update(); break; #ifdef Q_WS_MAC case QEvent::MacSizeChange: updateGeometry(); break; #endif default: break; } } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive mouse move events for the widget. If mouse tracking is switched off, mouse move events only occur if a mouse button is pressed while the mouse is being moved. If mouse tracking is switched on, mouse move events occur even if no mouse button is pressed. QMouseEvent::pos() reports the position of the mouse cursor, relative to this widget. For press and release events, the position is usually the same as the position of the last mouse move event, but it might be different if the user's hand shakes. This is a feature of the underlying window system, not Qt. \sa setMouseTracking(), mousePressEvent(), mouseReleaseEvent(), mouseDoubleClickEvent(), event(), QMouseEvent, {Scribble Example} */ void QWidget::mouseMoveEvent(QMouseEvent *event) { event->ignore(); } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive mouse press events for the widget. If you create new widgets in the mousePressEvent() the mouseReleaseEvent() may not end up where you expect, depending on the underlying window system (or X11 window manager), the widgets' location and maybe more. The default implementation implements the closing of popup widgets when you click outside the window. For other widget types it does nothing. \sa mouseReleaseEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), event(), QMouseEvent, {Scribble Example} */ void QWidget::mousePressEvent(QMouseEvent *event) { event->ignore(); if ((windowType() == Qt::Popup)) { event->accept(); QWidget* w; while ((w = qApp->activePopupWidget()) && w != this){ w->close(); if (qApp->activePopupWidget() == w) // widget does not want to dissappear w->hide(); // hide at least } if (!rect().contains(event->pos())){ close(); } } } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive mouse release events for the widget. \sa mousePressEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), event(), QMouseEvent, {Scribble Example} */ void QWidget::mouseReleaseEvent(QMouseEvent *event) { event->ignore(); } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive mouse double click events for the widget. The default implementation generates a normal mouse press event. Note that the widgets gets a mousePressEvent() and a mouseReleaseEvent() before the mouseDoubleClickEvent(). \sa mousePressEvent(), mouseReleaseEvent() mouseMoveEvent(), event(), QMouseEvent */ void QWidget::mouseDoubleClickEvent(QMouseEvent *event) { mousePressEvent(event); // try mouse press event } #ifndef QT_NO_WHEELEVENT /*! This event handler, for event \a event, can be reimplemented in a subclass to receive wheel events for the widget. If you reimplement this handler, it is very important that you \link QWheelEvent ignore()\endlink the event if you do not handle it, so that the widget's parent can interpret it. The default implementation ignores the event. \sa QWheelEvent::ignore(), QWheelEvent::accept(), event(), QWheelEvent */ void QWidget::wheelEvent(QWheelEvent *event) { event->ignore(); } #endif // QT_NO_WHEELEVENT #ifndef QT_NO_TABLETEVENT /*! This event handler, for event \a event, can be reimplemented in a subclass to receive tablet events for the widget. If you reimplement this handler, it is very important that you \link QTabletEvent ignore()\endlink the event if you do not handle it, so that the widget's parent can interpret it. The default implementation ignores the event. \sa QTabletEvent::ignore(), QTabletEvent::accept(), event(), QTabletEvent */ void QWidget::tabletEvent(QTabletEvent *event) { event->ignore(); } #endif // QT_NO_TABLETEVENT /*! This event handler, for event \a event, can be reimplemented in a subclass to receive key press events for the widget. A widget must call setFocusPolicy() to accept focus initially and have focus in order to receive a key press event. If you reimplement this handler, it is very important that you \link QKeyEvent ignore()\endlink the event if you do not understand it, so that the widget's parent can interpret it. The default implementation closes popup widgets if the user presses Esc. Otherwise the event is ignored. \sa keyReleaseEvent(), QKeyEvent::ignore(), setFocusPolicy(), focusInEvent(), focusOutEvent(), event(), QKeyEvent, {Tetrix Example} */ void QWidget::keyPressEvent(QKeyEvent *event) { if ((windowType() == Qt::Popup) && event->key() == Qt::Key_Escape) { event->accept(); close(); } else { event->ignore(); } } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive key release events for the widget. A widget must \link setFocusPolicy() accept focus\endlink initially and \link hasFocus() have focus\endlink in order to receive a key release event. If you reimplement this handler, it is very important that you \link QKeyEvent ignore()\endlink the release if you do not understand it, so that the widget's parent can interpret it. The default implementation ignores the event. \sa keyPressEvent(), QKeyEvent::ignore(), setFocusPolicy(), focusInEvent(), focusOutEvent(), event(), QKeyEvent */ void QWidget::keyReleaseEvent(QKeyEvent *event) { event->ignore(); } /*! \fn void QWidget::focusInEvent(QFocusEvent *event) This event handler can be reimplemented in a subclass to receive keyboard focus events (focus received) for the widget. The event is passed in the \a event parameter A widget normally must setFocusPolicy() to something other than Qt::NoFocus in order to receive focus events. (Note that the application programmer can call setFocus() on any widget, even those that do not normally accept focus.) The default implementation updates the widget (except for windows that do not specify a focusPolicy()). \sa focusOutEvent(), setFocusPolicy(), keyPressEvent(), keyReleaseEvent(), event(), QFocusEvent */ void QWidget::focusInEvent(QFocusEvent *) { if (focusPolicy() != Qt::NoFocus || !isWindow()) { update(); } } /*! \fn void QWidget::focusOutEvent(QFocusEvent *event) This event handler can be reimplemented in a subclass to receive keyboard focus events (focus lost) for the widget. The events is passed in the \a event parameter. A widget normally must setFocusPolicy() to something other than Qt::NoFocus in order to receive focus events. (Note that the application programmer can call setFocus() on any widget, even those that do not normally accept focus.) The default implementation updates the widget (except for windows that do not specify a focusPolicy()). \sa focusInEvent(), setFocusPolicy(), keyPressEvent(), keyReleaseEvent(), event(), QFocusEvent */ void QWidget::focusOutEvent(QFocusEvent *) { if (focusPolicy() != Qt::NoFocus || !isWindow()) update(); } /*! \fn void QWidget::enterEvent(QEvent *event) This event handler can be reimplemented in a subclass to receive widget enter events which are passed in the \a event parameter. An event is sent to the widget when the mouse cursor enters the widget. \sa leaveEvent(), mouseMoveEvent(), event() */ void QWidget::enterEvent(QEvent *) { } /*! \fn void QWidget::leaveEvent(QEvent *event) This event handler can be reimplemented in a subclass to receive widget leave events which are passed in the \a event parameter. A leave event is sent to the widget when the mouse cursor leaves the widget. \sa enterEvent(), mouseMoveEvent(), event() */ void QWidget::leaveEvent(QEvent *) { } /*! \fn void QWidget::paintEvent(QPaintEvent *event) This event handler can be reimplemented in a subclass to receive paint events which are passed in the \a event parameter. A paint event is a request to repaint all or part of the widget. It can happen as a result of repaint() or update(), or because the widget was obscured and has now been uncovered, or for many other reasons. Many widgets can simply repaint their entire surface when asked to, but some slow widgets need to optimize by painting only the requested region: QPaintEvent::region(). This speed optimization does not change the result, as painting is clipped to that region during event processing. QListView and QTableView do this, for example. Qt also tries to speed up painting by merging multiple paint events into one. When update() is called several times or the window system sends several paint events, Qt merges these events into one event with a larger region (see QRegion::united()). repaint() does not permit this optimization, so we suggest using update() whenever possible. When the paint event occurs, the update region has normally been erased, so that you're painting on the widget's background. The background can be set using setBackgroundRole() and setPalette(). From Qt 4.0, QWidget automatically double-buffers its painting, so there's no need to write double-buffering code in paintEvent() to avoid flicker. Note: Under X11 it is possible to toggle the global double buffering by calling \c qt_x11_set_global_double_buffer(). Example usage: \code ... extern void qt_x11_set_global_double_buffer(bool); qt_x11_set_global_double_buffer(false); ... \endcode Note: In general, one should refrain from calling update() or repaint() \bold {inside} of paintEvent(). For example, calling update() or repaint() on children inside a paintEvent() results in undefined behavior; the child may or may not get a paint event. \sa event(), repaint(), update(), QPainter, QPixmap, QPaintEvent, {Analog Clock Example} */ void QWidget::paintEvent(QPaintEvent *) { } /*! \fn void QWidget::moveEvent(QMoveEvent *event) This event handler can be reimplemented in a subclass to receive widget move events which are passed in the \a event parameter. When the widget receives this event, it is already at the new position. The old position is accessible through QMoveEvent::oldPos(). \sa resizeEvent(), event(), move(), QMoveEvent */ void QWidget::moveEvent(QMoveEvent *) { } /*! This event handler can be reimplemented in a subclass to receive widget resize events which are passed in the \a event parameter. When resizeEvent() is called, the widget already has its new geometry. The old size is accessible through QResizeEvent::oldSize(). The widget will be erased and receive a paint event immediately after processing the resize event. No drawing need be (or should be) done inside this handler. \sa moveEvent(), event(), resize(), QResizeEvent, paintEvent(), {Scribble Example} */ void QWidget::resizeEvent(QResizeEvent * /* event */) { } #ifndef QT_NO_ACTION /*! \fn void QWidget::actionEvent(QActionEvent *event) This event handler is called with the given \a event whenever the widget's actions are changed. \sa addAction(), insertAction(), removeAction(), actions(), QActionEvent */ void QWidget::actionEvent(QActionEvent *) { } #endif /*! This event handler, for event \a event, can be reimplemented in a subclass to receive widget close events. \sa event(), hide(), close(), QCloseEvent, {Application Example} */ void QWidget::closeEvent(QCloseEvent *event) { event->accept(); } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive widget context menu events. The handler is called when the widget's \l contextMenuPolicy is Qt::DefaultContextMenu. The default implementation ignores the context event. See the \l QContextMenuEvent documentation for more details. \sa event(), QContextMenuEvent customContextMenuRequested() */ void QWidget::contextMenuEvent(QContextMenuEvent *event) { event->ignore(); } /*! This event handler, for event \a event, can be reimplemented in a subclass to receive Input Method composition events. This handler is called when the state of the input method changes. Note that when creating custom text editing widgets, the Qt::WA_InputMethodEnabled window attribute must be set explicitly (using the setAttribute() function) in order to receive input method events. The default implementation calls event->ignore(), which rejects the Input Method event. See the \l QInputMethodEvent documentation for more details. \sa event(), QInputMethodEvent */ void QWidget::inputMethodEvent(QInputMethodEvent *event) { event->ignore(); } /*! This method is only relevant for input widgets. It is used by the input method to query a set of properties of the widget to be able to support complex input method operations as support for surrounding text and reconversions. \a query specifies which property is queried. \sa inputMethodEvent(), QInputMethodEvent, QInputContext */ QVariant QWidget::inputMethodQuery(Qt::InputMethodQuery query) const { switch(query) { case Qt::ImMicroFocus: return QRect(width()/2, 0, 1, height()); case Qt::ImFont: return font(); default: return QVariant(); } } #ifndef QT_NO_DRAGANDDROP /*! \fn void QWidget::dragEnterEvent(QDragEnterEvent *event) This event handler is called when a drag is in progress and the mouse enters this widget. The event is passed in the \a event parameter. If the event is ignored, the widget won't receive any \l{dragMoveEvent()}{drag move events}. See the \link dnd.html Drag-and-drop documentation\endlink for an overview of how to provide drag-and-drop in your application. \sa QTextDrag, QImageDrag, QDragEnterEvent */ void QWidget::dragEnterEvent(QDragEnterEvent *) { } /*! \fn void QWidget::dragMoveEvent(QDragMoveEvent *event) This event handler is called if a drag is in progress, and when any of the following conditions occurs: the cursor enters this widget, the cursor moves within this widget, or a modifier key is pressed on the keyboard while this widget has the focus. The event is passed in the \a event parameter. See the \link dnd.html Drag-and-drop documentation\endlink for an overview of how to provide drag-and-drop in your application. \sa QTextDrag, QImageDrag, QDragMoveEvent */ void QWidget::dragMoveEvent(QDragMoveEvent *) { } /*! \fn void QWidget::dragLeaveEvent(QDragLeaveEvent *event) This event handler is called when a drag is in progress and the mouse leaves this widget. The event is passed in the \a event parameter. See the \link dnd.html Drag-and-drop documentation\endlink for an overview of how to provide drag-and-drop in your application. \sa QTextDrag, QImageDrag, QDragLeaveEvent */ void QWidget::dragLeaveEvent(QDragLeaveEvent *) { } /*! \fn void QWidget::dropEvent(QDropEvent *event) This event handler is called when the drag is dropped on this widget which are passed in the \a event parameter. See the \link dnd.html Drag-and-drop documentation\endlink for an overview of how to provide drag-and-drop in your application. \sa QTextDrag, QImageDrag, QDropEvent */ void QWidget::dropEvent(QDropEvent *) { } #endif // QT_NO_DRAGANDDROP /*! \fn void QWidget::showEvent(QShowEvent *event) This event handler can be reimplemented in a subclass to receive widget show events which are passed in the \a event parameter. Non-spontaneous show events are sent to widgets immediately before they are shown. The spontaneous show events of windows are delivered afterwards. Note: A widget receives spontaneous show and hide events when its mapping status is changed by the window system, e.g. a spontaneous hide event when the user minimizes the window, and a spontaneous show event when the window is restored again. After receiving a spontaneous hide event, a widget is still considered visible in the sense of isVisible(). \sa visible, event(), QShowEvent */ void QWidget::showEvent(QShowEvent *) { } /*! \fn void QWidget::hideEvent(QHideEvent *event) This event handler can be reimplemented in a subclass to receive widget hide events. The event is passed in the \a event parameter. Hide events are sent to widgets immediately after they have been hidden. Note: A widget receives spontaneous show and hide events when its mapping status is changed by the window system, e.g. a spontaneous hide event when the user minimizes the window, and a spontaneous show event when the window is restored again. After receiving a spontaneous hide event, a widget is still considered visible in the sense of isVisible(). \sa visible, event(), QHideEvent */ void QWidget::hideEvent(QHideEvent *) { } /* \fn QWidget::x11Event(MSG *) This special event handler can be reimplemented in a subclass to receive native X11 events. In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget. \warning This function is not portable. \sa QApplication::x11EventFilter() */ #if defined(Q_WS_MAC) /*! \fn bool QWidget::macEvent(EventHandlerCallRef caller, EventRef event) This special event handler can be reimplemented in a subclass to receive native Macintosh events which are passed from the \a caller with the event details in the \a event parameter. In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget. \warning This function is not portable. \warning This function is not currently called, consider using QApplication::macEventFilter() instead. \sa QApplication::macEventFilter() */ bool QWidget::macEvent(EventHandlerCallRef, EventRef) { return false; } #endif #if defined(Q_WS_WIN) /*! This special event handler can be reimplemented in a subclass to receive native Windows events which are passed in the \a message parameter. In your reimplementation of this function, if you want to stop the event being handled by Qt, return true and set \a result to the value that the window procedure should return. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget. \warning This function is not portable. \sa QApplication::winEventFilter() */ bool QWidget::winEvent(MSG *message, long *result) { Q_UNUSED(message); Q_UNUSED(result); return false; } #endif #if defined(Q_WS_X11) /*! \fn bool QWidget::x11Event(XEvent *event) This special event handler can be reimplemented in a subclass to receive native X11 events which are passed in the \a event parameter. In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget. \warning This function is not portable. \sa QApplication::x11EventFilter() */ bool QWidget::x11Event(XEvent *) { return false; } #endif #if defined(Q_WS_QWS) /*! \fn bool QWidget::qwsEvent(QWSEvent *event) This special event handler can be reimplemented in a subclass to receive native Qtopia Core events which are passed in the \a event parameter. In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget. \warning This function is not portable. \sa QApplication::qwsEventFilter() */ bool QWidget::qwsEvent(QWSEvent *) { return false; } #endif /*! Ensures that the widget has been polished by QStyle (i.e., has a proper font and palette). QWidget calls this function after it has been fully constructed but before it is shown the very first time. You can call this function if you want to ensure that the widget is polished before doing an operation, e.g., the correct font size might be needed in the widget's sizeHint() reimplementation. Note that this function \e is called from the default implementation of sizeHint(). Polishing is useful for final initialization that must happen after all constructors (from base classes as well as from subclasses) have been called. If you need to change some settings when a widget is polished, reimplement event() and handle the QEvent::Polish event type. \bold{Note:} The function is declared const so that it can be called from other const functions (e.g., sizeHint()). \sa event() */ void QWidget::ensurePolished() const { Q_D(const QWidget); const QMetaObject *m = metaObject(); if (m == d->polished) return; d->polished = m; QEvent e(QEvent::Polish); QCoreApplication::sendEvent(const_cast(this), &e); // polish children after 'this' QList children = d->children; for (int i = 0; i < children.size(); ++i) { QObject *o = children.at(i); if(!o->isWidgetType()) continue; if (QWidget *w = qobject_cast(o)) w->ensurePolished(); } if (d->parent && d->sendChildEvents) { QChildEvent e(QEvent::ChildPolished, const_cast(this)); QCoreApplication::sendEvent(d->parent, &e); } } /*! Returns the mask currently set on a widget. If no mask is set the return value will be an empty region. \sa setMask(), clearMask(), QRegion::isEmpty(), {Shaped Clock Example} */ QRegion QWidget::mask() const { Q_D(const QWidget); return d->extra ? d->extra->mask : QRegion(); } /*! Returns the layout manager that is installed on this widget, or 0 if no layout manager is installed. The layout manager sets the geometry of the widget's children that have been added to the layout. \sa setLayout(), sizePolicy(), {Layout Classes} */ QLayout *QWidget::layout() const { return d_func()->layout; } /*! \fn void QWidget::setLayout(QLayout *layout) Sets the layout manager for this widget to \a layout. If there already is a layout manager installed on this widget, QWidget won't let you install another. You must first delete the existing layout manager (returned by layout()) before you can call setLayout() with the new layout. Example: \quotefromfile tutorial/t10/lcdrange.cpp \skipto = new QVBoxLayout \printuntil setLayout An alternative to calling this function is to pass this widget to the layout's constructor. The QWidget will take ownership of \a layout. \sa layout(), {Layout Classes} */ void QWidget::setLayout(QLayout *l) { if (!l) { qWarning("QWidget::setLayout: Cannot set layout to 0"); return; } if (layout()) { if (layout() != l) qWarning("QWidget::setLayout: Attempting to add QLayout \"%s\" to %s \"%s\", which already has a" " layout", l->objectName().toLocal8Bit().data(), metaObject()->className(), objectName().toLocal8Bit().data()); return; } l->d_func()->topLevel = true; d_func()->layout = l; if (l->parent() != this) { l->setParent(this); l->d_func()->reparentChildWidgets(this); l->invalidate(); } } /*! \property QWidget::sizePolicy \brief the default layout behavior of the widget If there is a QLayout that manages this widget's children, the size policy specified by that layout is used. If there is no such QLayout, the result of this function is used. The default policy is Preferred/Preferred, which means that the widget can be freely resized, but prefers to be the size sizeHint() returns. Button-like widgets set the size policy to specify that they may stretch horizontally, but are fixed vertically. The same applies to lineedit controls (such as QLineEdit, QSpinBox or an editable QComboBox) and other horizontally orientated widgets (such as QProgressBar). QToolButton's are normally square, so they allow growth in both directions. Widgets that support different directions (such as QSlider, QScrollBar or QHeader) specify stretching in the respective direction only. Widgets that can provide scroll bars (usually subclasses of QScrollArea) tend to specify that they can use additional space, and that they can make do with less than sizeHint(). \sa sizeHint() QLayout QSizePolicy updateGeometry() */ QSizePolicy QWidget::sizePolicy() const { Q_D(const QWidget); return d->size_policy; } void QWidget::setSizePolicy(QSizePolicy policy) { Q_D(QWidget); setAttribute(Qt::WA_WState_OwnSizePolicy); if (policy == d->size_policy) return; d->size_policy = policy; updateGeometry(); } /*! \fn void QWidget::setSizePolicy(QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical) \overload Sets the size policy of the widget to \a horizontal and \a vertical, with standard stretch and no height-for-width. \sa QSizePolicy::QSizePolicy() */ /*! Returns the preferred height for this widget, given the width \a w. If this widget has a layout, the default implementation returns the layout's preferred height. if there is no layout, the default implementation returns -1 indicating that the preferred height does not depend on the width. */ int QWidget::heightForWidth(int w) const { if (layout() && layout()->hasHeightForWidth()) return layout()->totalHeightForWidth(w); return -1; } /*! \fn QWidget *QWidget::childAt(int x, int y) const Returns the visible child widget at the position (\a{x}, \a{y}) in the widget's coordinate system. If there is no visible child widget at the specified position, the function returns 0. */ /*! \overload Returns the visible child widget at point \a p in the widget's own coordinate system. */ QWidget *QWidget::childAt(const QPoint &p) const { if (!rect().contains(p)) return 0; Q_D(const QWidget); for (int i = d->children.size(); i > 0 ;) { --i; QWidget *w = qobject_cast(d->children.at(i)); if (w && !w->isWindow() && !w->isHidden() && w->geometry().contains(p)) { if (w->testAttribute(Qt::WA_TransparentForMouseEvents)) continue; QPoint childPoint = w->mapFromParent(p); if (QWidget *t = w->childAt(childPoint)) return t; // if WMouseNoMask is set the widget mask is ignored, if // the widget has no mask then the WMouseNoMask flag has no // effect if (w->testAttribute(Qt::WA_MouseNoMask) || w->mask().contains(childPoint) || w->mask().isEmpty()) return w; } } return 0; } /*! Notifies the layout system that this widget has changed and may need to change geometry. Call this function if the sizeHint() or sizePolicy() have changed. For explicitly hidden widgets, updateGeometry() is a no-op. The layout system will be notified as soon as the widget is shown. */ void QWidget::updateGeometry() { Q_D(QWidget); if (!isWindow() && !isHidden() && parentWidget() && (!d->extra || d->extra->minw != d->extra->maxw || d->extra->minh != d->extra->maxh)) { if (parentWidget()->d_func()->layout) parentWidget()->d_func()->layout->invalidate(); else if (parentWidget()->isVisible()) QApplication::postEvent(parentWidget(), new QEvent(QEvent::LayoutRequest)); } } /*! \property QWidget::windowFlags Window flags are a combination of a type (e.g. Qt::Dialog) and zero or more hints to the window system (e.g. Qt::FramelessWindowHint). If the widget had type Qt::Widget or Qt::SubWindow and becomes a window (Qt::Window, Qt::Dialog, etc.), it is put at position (0, 0) on the desktop. If the widget is a window and becomes a Qt::Widget or Qt::SubWindow, it is put at position (0, 0) relative to its parent widget. \sa windowType(), {Window Flags Example} */ void QWidget::setWindowFlags(Qt::WindowFlags flags) { if (data->window_flags == flags) return; if ((data->window_flags | flags) & Qt::Window) { // the old type was a window and/or the new type is a window QPoint oldPos = pos(); setParent(parentWidget(), flags); // if both types are windows or neither of them are, we restore // the old position if (!((data->window_flags ^ flags) & Qt::Window) && testAttribute(Qt::WA_Moved)) move(oldPos); } else { data->window_flags = flags; } } /*! Sets the window flags for the widget to \a flags, \e without telling the window system. \warning Do not call this function unless you really know what you're doing. \sa setWindowFlags() */ void QWidget::overrideWindowFlags(Qt::WindowFlags flags) { data->window_flags = flags; } /*! \fn Qt::WindowType QWidget::windowType() const Returns the window type of this widget. This is identical to windowFlags() & Qt::WindowType_Mask. \sa windowFlags */ /*! Sets the parent of the widget to \a parent, and resets the window flags. The widget is moved to position (0, 0) in its new parent. If the new parent widget is in a different window, the reparented widget and its children are appended to the end of the \l{setFocusPolicy()}{tab chain} of the new parent widget, in the same internal order as before. If one of the moved widgets had keyboard focus, setParent() calls clearFocus() for that widget. If the new parent widget is in the same window as the old parent, setting the parent doesn't change the tab order or keyboard focus. If the "new" parent widget is the old parent widget, this function does nothing. \warning It is very unlikely that you will ever need this function. If you have a widget that changes its content dynamically, it is far easier to use \l QStackedWidget. \sa setWindowFlags() */ void QWidget::setParent(QWidget *parent) { if (parent == parentWidget()) return; setParent((QWidget*)parent, windowFlags() & ~Qt::WindowType_Mask); } /*! \overload This function also takes widget flags, \a f as an argument. */ void QWidget::setParent(QWidget *parent, Qt::WindowFlags f) { Q_D(QWidget); bool resized = testAttribute(Qt::WA_Resized); bool wasCreated = testAttribute(Qt::WA_WState_Created); QWidget *oldtlw = window(); bool newParent = (parent != parentWidget()) || !wasCreated; if (wasCreated) { if (!testAttribute(Qt::WA_WState_Hidden)) { hide(); setAttribute(Qt::WA_WState_ExplicitShowHide, false); } if (newParent) { QEvent e(QEvent::ParentAboutToChange); QApplication::sendEvent(this, &e); } } if (newParent && isAncestorOf(focusWidget())) focusWidget()->clearFocus(); d->setParent_sys(parent, f); #ifdef Q_BACKINGSTORE_SUBSURFACES QTLWExtra *extra = d->maybeTopData(); QWindowSurface *windowSurface = (extra ? extra->windowSurface : 0); if (newParent && windowSurface) { QWidgetBackingStore *oldBs = oldtlw->d_func()->maybeBackingStore(); if (oldBs) oldBs->subSurfaces.removeAll(windowSurface); if (parent) { QWidgetBackingStore *newBs = parent->d_func()->maybeBackingStore(); if (newBs) newBs->subSurfaces.append(windowSurface); } } #endif #ifdef Q_WIDGET_USE_DIRTYLIST if (newParent) { QWidgetBackingStore *oldBs = oldtlw->d_func()->maybeBackingStore(); if (oldBs) oldBs->removeDirtyWidget(this); } #endif if ((QApplicationPrivate::app_compile_version < 0x040200 || QApplicationPrivate::testAttribute(Qt::AA_ImmediateWidgetCreation)) && !testAttribute(Qt::WA_WState_Created)) create(); d->reparentFocusWidgets(oldtlw); setAttribute(Qt::WA_Resized, resized); if (!testAttribute(Qt::WA_StyleSheet) && (!parent || !parent->testAttribute(Qt::WA_StyleSheet))) { d->resolveFont(); d->resolvePalette(); } d->resolveLayoutDirection(); d->resolveLocale(); // Note: GL widgets under Windows will always need a ParentChange // event to handle recreation/rebinding of the GL context, hence // the (f & Qt::MSWindowsOwnDC) clause if (newParent #ifdef Q_WS_WIN || (f & Qt::MSWindowsOwnDC) #endif ) { // propagate enabled updates enabled state to non-windows if (!isWindow()) { if (!testAttribute(Qt::WA_ForceDisabled)) d->setEnabled_helper(parent ? parent->isEnabled() : true); if (!testAttribute(Qt::WA_ForceUpdatesDisabled)) d->setUpdatesEnabled_helper(parent ? parent->updatesEnabled() : true); } d->inheritStyle(); // send and post remaining QObject events if (parent && d->sendChildEvents) { QChildEvent e(QEvent::ChildAdded, this); QApplication::sendEvent(parent, &e); #ifdef QT3_SUPPORT if (parent->d_func()->pendingChildInsertedEvents.isEmpty()) { QApplication::postEvent(parent, new QEvent(QEvent::ChildInsertedRequest), Qt::HighEventPriority); } parent->d_func()->pendingChildInsertedEvents.append(this); #endif } //### already hidden above ---> must probably do something smart on the mac // #ifdef Q_WS_MAC // extern bool qt_mac_is_macdrawer(const QWidget *); //qwidget_mac.cpp // if(!qt_mac_is_macdrawer(q)) //special case // q->setAttribute(Qt::WA_WState_Hidden); // #else // q->setAttribute(Qt::WA_WState_Hidden); //#endif if (parent && d->sendChildEvents && d->polished) { QChildEvent e(QEvent::ChildPolished, this); QCoreApplication::sendEvent(parent, &e); } QEvent e(QEvent::ParentChange); QApplication::sendEvent(this, &e); } if (!wasCreated) { if (isWindow() || parentWidget()->isVisible()) setAttribute(Qt::WA_WState_Hidden, true); else if (!testAttribute(Qt::WA_WState_ExplicitShowHide)) setAttribute(Qt::WA_WState_Hidden, false); } } /*! Scrolls the widget including its children \a dx pixels to the right and \a dy downward. Both \a dx and \a dy may be negative. After scrolling, the widgets will receive paint events for the areas that need to be repainted. For widgets that Qt knows to be opaque, this is only the newly exposed parts. For example, if an opaque widget is scrolled 8 pixels to the left, only an 8-pixel wide stripe at the right edge needs updating. Since widgets propagate the contents of their parents by default, you need to set the \l autoFillBackground property, or use setAttribute() to set the Qt::WA_OpaquePaintEvent attribute, to make a widget opaque. For widgets that use contents propagation, a scroll will cause an update of the entire scroll area. \sa {Transparency and Double Buffering} */ void QWidget::scroll(int dx, int dy) { if (!updatesEnabled() && children().size() == 0 || !isVisible()) return; if (dx == 0 && dy == 0) return; Q_D(QWidget); #ifdef Q_WIDGET_CACHE_OPAQUEREGIONS d->setDirtyOpaqueRegion(); #endif d->scroll_sys(dx, dy); } /*! \overload This version only scrolls \a r and does not move the children of the widget. If \a r is empty or invalid, the result is undefined. \sa QScrollArea bitBlt() */ void QWidget::scroll(int dx, int dy, const QRect &r) { if (!updatesEnabled() && children().size() == 0 || !isVisible()) return; if (dx == 0 && dy == 0) return; Q_D(QWidget); d->scroll_sys(dx, dy, r); } /*! Repaints the widget directly by calling paintEvent() immediately, unless updates are disabled or the widget is hidden. We suggest only using repaint() if you need an immediate repaint, for example during animation. In almost all circumstances update() is better, as it permits Qt to optimize for speed and minimize flicker. \warning If you call repaint() in a function which may itself be called from paintEvent(), you may get infinite recursion. The update() function never causes recursion. \sa update(), paintEvent(), setUpdatesEnabled() */ void QWidget::repaint() { Q_D(QWidget); repaint(d->clipRect()); } /*! \overload This version repaints a rectangle (\a x, \a y, \a w, \a h) inside the widget. If \a w is negative, it is replaced with \c{width() - x}, and if \a h is negative, it is replaced width \c{height() - y}. */ void QWidget::repaint(int x, int y, int w, int h) { if (x > data->crect.width() || y > data->crect.height()) return; Q_D(QWidget); if (w < 0) w = data->crect.width() - x; if (h < 0) h = data->crect.height() - y; repaint(d->clipRect().intersected(QRect(x, y, w, h))); } /*! \overload This version repaints a rectangle \a r inside the widget. */ void QWidget::repaint(const QRect &r) { Q_D(QWidget); repaint(QRegion(d->clipRect().intersected(r))); } /*! \fn void QWidget::repaint(const QRegion &rgn) \overload This version repaints a region \a rgn inside the widget. */ /*! \fn void QWidget::update() Updates the widget unless updates are disabled or the widget is hidden. This function does not cause an immediate repaint; instead it schedules a paint event for processing when Qt returns to the main event loop. This permits Qt to optimize for more speed and less flicker than a call to repaint() does. Calling update() several times normally results in just one paintEvent() call. Qt normally erases the widget's area before the paintEvent() call. If the Qt::WA_OpaquePaintEvent widget attribute is set, the widget is responsible for painting all its pixels with an opaque color. \sa repaint() paintEvent(), setUpdatesEnabled(), {Analog Clock Example} */ /*! \fn void QWidget::update(int x, int y, int w, int h) \overload This version updates a rectangle (\a x, \a y, \a w, \a h) inside the widget. */ /*! \fn void QWidget::update(const QRect &r) \overload This version updates a rectangle \a r inside the widget. */ /*! \fn void QWidget::update(const QRegion &rgn) \overload This version repaints a region \a rgn inside the widget. */ #ifdef QT3_SUPPORT /*! Clear the rectangle at point (\a x, \a y) of width \a w and height \a h. \warning This is best done in a paintEvent(). */ void QWidget::erase_helper(int x, int y, int w, int h) { if (testAttribute(Qt::WA_NoSystemBackground) || testAttribute(Qt::WA_UpdatesDisabled) || !testAttribute(Qt::WA_WState_Visible)) return; if (w < 0) w = data->crect.width() - x; if (h < 0) h = data->crect.height() - y; if (w != 0 && h != 0) { QPainter p(this); p.eraseRect(QRect(x, y, w, h)); } } /*! \overload Clear the given region, \a rgn. Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your erasing and call update() to schedule a replaint whenever necessary. See also QPainter. */ void QWidget::erase(const QRegion& rgn) { if (testAttribute(Qt::WA_NoSystemBackground) || testAttribute(Qt::WA_UpdatesDisabled) || !testAttribute(Qt::WA_WState_Visible)) return; QPainter p(this); p.setClipRegion(rgn); p.eraseRect(rgn.boundingRect()); } void QWidget::drawText_helper(int x, int y, const QString &str) { if(!testAttribute(Qt::WA_WState_Visible)) return; QPainter paint(this); paint.drawText(x, y, str); } /*! Closes the widget. Use the no-argument overload instead. */ bool QWidget::close(bool alsoDelete) { QPointer that = this; bool accepted = close(); if (alsoDelete && accepted && that) deleteLater(); return accepted; } void QWidget::setIcon(const QPixmap &i) { setWindowIcon(i); } /*! Return's the widget's icon. Use windowIcon() instead. */ const QPixmap *QWidget::icon() const { Q_D(const QWidget); return (d->extra && d->extra->topextra) ? d->extra->topextra->iconPixmap : 0; } #endif // QT3_SUPPORT /*! Sets the attribute \a attribute on this widget if \a on is true; otherwise clears the attribute. \sa testAttribute() */ void QWidget::setAttribute(Qt::WidgetAttribute attribute, bool on) { if (testAttribute(attribute) == on) return; Q_D(QWidget); Q_ASSERT_X(sizeof(d->high_attributes)*8 >= (Qt::WA_AttributeCount - sizeof(uint)*8), "QWidget::setAttribute(WidgetAttribute, bool)", "QWidgetPrivate::high_attributes[] too small to contain all attributes in WidgetAttribute"); if (attribute < int(8*sizeof(uint))) { if (on) data->widget_attributes |= (1<widget_attributes &= ~(1<high_attributes[int_off] |= (1<<(x-(int_off*8*sizeof(uint)))); else d->high_attributes[int_off] &= ~(1<<(x-(int_off*8*sizeof(uint)))); } switch (attribute) { #ifndef QT_NO_DRAGANDDROP case Qt::WA_AcceptDrops: { if (on && !testAttribute(Qt::WA_DropSiteRegistered)) setAttribute(Qt::WA_DropSiteRegistered, true); else if (!on && (isWindow() || !parentWidget() || !parentWidget()->testAttribute(Qt::WA_DropSiteRegistered))) setAttribute(Qt::WA_DropSiteRegistered, false); QEvent e(QEvent::AcceptDropsChange); QApplication::sendEvent(this, &e); break; } case Qt::WA_DropSiteRegistered: { d->registerDropSite(on); for (int i = 0; i < d->children.size(); ++i) { QWidget *w = qobject_cast(d->children.at(i)); if (w && !w->isWindow() && !w->testAttribute(Qt::WA_AcceptDrops) && w->testAttribute(Qt::WA_DropSiteRegistered) != on) w->setAttribute(Qt::WA_DropSiteRegistered, on); } break; } #endif case Qt::WA_NoChildEventsForParent: d->sendChildEvents = !on; break; case Qt::WA_NoChildEventsFromChildren: d->receiveChildEvents = !on; break; case Qt::WA_MacBrushedMetal: #ifdef Q_WS_MAC d->setStyle_helper(style(), false, true); // Make sure things get unpolished/polished correctly. // fall through since changing the metal attribute affects the opaque size grip. case Qt::WA_MacOpaqueSizeGrip: d->macUpdateOpaqueSizeGrip(); break; case Qt::WA_MacShowFocusRect: if (hasFocus()) { clearFocus(); setFocus(); } break; #endif case Qt::WA_MacAlwaysShowToolWindow: #ifdef Q_WS_MAC d->macUpdateHideOnSuspend(); #endif break; case Qt::WA_MacNormalSize: case Qt::WA_MacSmallSize: case Qt::WA_MacMiniSize: #ifdef Q_WS_MAC d->macUpdateSizeAttribute(); #endif break; case Qt::WA_ShowModal: if (!on) { if (isVisible()) QApplicationPrivate::leaveModal(this); // reset modality type to Modeless when clearing WA_ShowModal data->window_modality = Qt::NonModal; } else if (data->window_modality == Qt::NonModal) { // determine the modality type if it hasn't been set prior // to setting WA_ShowModal. set the default to WindowModal // if we are the child of a group leader; otherwise use // ApplicationModal. QWidget *w = parentWidget(); if (w) w = w->window(); while (w && !w->testAttribute(Qt::WA_GroupLeader)) { w = w->parentWidget(); if (w) w = w->window(); } data->window_modality = (w && w->testAttribute(Qt::WA_GroupLeader)) ? Qt::WindowModal : Qt::ApplicationModal; } if (testAttribute(Qt::WA_WState_Created)) { // don't call setModal_sys() before create_sys() d->setModal_sys(); } break; case Qt::WA_MouseTracking: { QEvent e(QEvent::MouseTrackingChange); QApplication::sendEvent(this, &e); break; } #if !defined(QT_NO_DIRECT3D) && defined(Q_WS_WIN) case Qt::WA_MSWindowsUseDirect3D: if (!qApp->testAttribute(Qt::AA_MSWindowsUseDirect3DByDefault)) { if (on) { if (!d->extra) d->createExtra(); d->extra->had_auto_fill_bg = d->extra->autoFillBackground; d->extra->had_no_system_bg = testAttribute(Qt::WA_NoSystemBackground); d->extra->had_paint_on_screen = testAttribute(Qt::WA_PaintOnScreen); // enforce the opaque widget state D3D needs d->extra->autoFillBackground = true; setAttribute(Qt::WA_PaintOnScreen); setAttribute(Qt::WA_NoSystemBackground); } else if (d->extra) { d->extra->autoFillBackground = d->extra->had_auto_fill_bg; setAttribute(Qt::WA_PaintOnScreen, d->extra->had_paint_on_screen); setAttribute(Qt::WA_NoSystemBackground, d->extra->had_no_system_bg); } } break; #endif case Qt::WA_PaintOnScreen: case Qt::WA_OpaquePaintEvent: d->updateIsOpaque(); break; case Qt::WA_NoSystemBackground: d->updateIsOpaque(); // fall through... case Qt::WA_UpdatesDisabled: d->updateSystemBackground(); break; case Qt::WA_TransparentForMouseEvents: #ifdef Q_WS_MAC d->macUpdateIgnoreMouseEvents(); #endif break; #ifdef Q_WS_WIN case Qt::WA_InputMethodEnabled: QWinInputContext::enable(this, on); break; #endif case Qt::WA_WindowPropagation: d->resolvePalette(); d->resolveFont(); d->resolveLocale(); break; #ifdef Q_WS_X11 case Qt::WA_NoX11EventCompression: if (!d->extra) d->createExtra(); d->extra->compress_events = on; break; #endif default: break; } } /*! \fn bool QWidget::testAttribute(Qt::WidgetAttribute attribute) const Returns true if attribute \a attribute is set on this widget; otherwise returns false. \sa setAttribute() */ bool QWidget::testAttribute_helper(Qt::WidgetAttribute attribute) const { Q_D(const QWidget); const int x = attribute - 8*sizeof(uint); const int int_off = x / (8*sizeof(uint)); return (d->high_attributes[int_off] & (1<<(x-(int_off*8*sizeof(uint))))); } /*! \property QWidget::windowOpacity \brief The level of opacity for the window. The valid range of opacity is from 1.0 (completely opaque) to 0.0 (completely transparent). By default the value of this property is 1.0. This feature is available on Mac OS X, X11 platforms that support the Composite extension, and Windows 2000 and later. Note that under X11 you need to have a composite manager running, and the X11 specific _NET_WM_WINDOW_OPACITY atom needs to be supported by the window manager you are using. \warning Changing this property from opaque to transparent might issue a paint event that needs to be processed before the window is displayed correctly. This affects mainly the use of QPixmap::grabWindow(). Also note that semi-transparent windows update and resize significantly slower than opaque windows. \sa setMask() */ /*! \property QWidget::windowModified \brief whether the document shown in the window has unsaved changes A modified window is a window whose content has changed but has not been saved to disk. This flag will have different effects varied by the platform. On Mac OS X the close button will have a modified look; on other platforms, the window title will have an '*' (asterisk). The window title must contain a "[*]" placeholder, which indicates where the '*' should appear. Normally, it should appear right after the file name (e.g., "document1.txt[*] - Text Editor"). If the window isn't modified, the placeholder is simply removed. \sa windowTitle, {Application Example}, {SDI Example}, {MDI Example} */ bool QWidget::isWindowModified() const { return testAttribute(Qt::WA_WindowModified); } void QWidget::setWindowModified(bool mod) { Q_D(QWidget); setAttribute(Qt::WA_WindowModified, mod); if (!windowTitle().contains(QLatin1String("[*]")) && mod) qWarning("QWidget::setWindowModified: The window title does not contain a '[*]' placeholder"); d->setWindowTitle_helper(windowTitle()); d->setWindowIconText_helper(windowIconText()); #ifdef Q_WS_MAC d->setWindowModified_sys(mod); #endif QEvent e(QEvent::ModifiedChange); QApplication::sendEvent(this, &e); } #ifndef QT_NO_TOOLTIP /*! \property QWidget::toolTip \brief the widget's tooltip Note that by default tooltips are only shown for widgets that are children of the active window. You can change this behavior by setting the attribute Qt::WA_AlwaysShowToolTips on the \e window, not on the widget with the tooltip. If you want to control a tooltip's behavior, you can intercept the event() function and catch the QEvent::ToolTip event (e.g., if you want to customize the area for which the tooltip should be shown). \sa QToolTip statusTip whatsThis */ void QWidget::setToolTip(const QString &s) { Q_D(QWidget); d->toolTip = s; } QString QWidget::toolTip() const { Q_D(const QWidget); return d->toolTip; } #endif // QT_NO_TOOLTIP #ifndef QT_NO_STATUSTIP /*! \property QWidget::statusTip \brief the widget's status tip \sa toolTip whatsThis */ void QWidget::setStatusTip(const QString &s) { Q_D(QWidget); d->statusTip = s; } QString QWidget::statusTip() const { Q_D(const QWidget); return d->statusTip; } #endif // QT_NO_STATUSTIP #ifndef QT_NO_WHATSTHIS /*! \property QWidget::whatsThis \brief the widget's What's This help text. \sa QWhatsThis QWidget::toolTip QWidget::statusTip */ void QWidget::setWhatsThis(const QString &s) { Q_D(QWidget); d->whatsThis = s; } QString QWidget::whatsThis() const { Q_D(const QWidget); return d->whatsThis; } #endif // QT_NO_WHATSTHIS #ifndef QT_NO_ACCESSIBILITY /*! \property QWidget::accessibleName \brief the widget's name as seen by assistive technologies It is be used by accessible clients to identify, find, or announce the widget for accessible clients. \sa QAccessibleInterface::text() */ void QWidget::setAccessibleName(const QString &name) { Q_D(QWidget); d->accessibleName = name; } QString QWidget::accessibleName() const { Q_D(const QWidget); return d->accessibleName; } /*! \property QWidget::accessibleDescription \brief the widget's description as seen by assistive technologies \sa QAccessibleInterface::text() */ void QWidget::setAccessibleDescription(const QString &description) { Q_D(QWidget); d->accessibleDescription = description; } QString QWidget::accessibleDescription() const { Q_D(const QWidget); return d->accessibleDescription; } #endif // QT_NO_ACCESSIBILITY #ifndef QT_NO_SHORTCUT /*! Adds a shortcut to Qt's shortcut system that watches for the given \a key sequence in the given \a context. If the \a context is not \c OnApplication, the shortcut is local to this widget; otherwise it applies to the application as a whole. If the same \a key sequence has been grabbed by several widgets, when the \a key sequence occurs a QEvent::Shortcut event is sent to all the widgets to which it applies in a non-deterministic order, but with the ``ambiguous'' flag set to true. \warning You should not normally need to use this function; instead create \l{QAction}s with the shortcut key sequences you require (if you also want equivalent menu options and toolbar buttons), or create \l{QShortcut}s if you just need key sequences. Both QAction and QShortcut handle all the event filtering for you, and provide signals which are triggered when the user triggers the key sequence, so are much easier to use than this low-level function. \sa releaseShortcut() setShortcutEnabled() */ int QWidget::grabShortcut(const QKeySequence &key, Qt::ShortcutContext context) { Q_ASSERT(qApp); if (key.isEmpty()) return 0; setAttribute(Qt::WA_GrabbedShortcut); return qApp->d_func()->shortcutMap.addShortcut(this, key, context); } /*! Removes the shortcut with the given \a id from Qt's shortcut system. The widget will no longer receive QEvent::Shortcut events for the shortcut's key sequence (unless it has other shortcuts with the same key sequence). \warning You should not normally need to use this function since Qt's shortcut system removes shortcuts automatically when their parent widget is destroyed. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function. Note also that this is an expensive operation. \sa grabShortcut() setShortcutEnabled() */ void QWidget::releaseShortcut(int id) { Q_ASSERT(qApp); if (id) qApp->d_func()->shortcutMap.removeShortcut(id, this, 0); } /*! If \a enable is true, the shortcut with the given \a id is enabled; otherwise the shortcut is disabled. \warning You should not normally need to use this function since Qt's shortcut system enables/disables shortcuts automatically as widgets become hidden/visible and gain or lose focus. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function. \sa grabShortcut() releaseShortcut() */ void QWidget::setShortcutEnabled(int id, bool enable) { Q_ASSERT(qApp); if (id) qApp->d_func()->shortcutMap.setShortcutEnabled(enable, id, this, 0); } /*! \since 4.2 If \a enable is true, auto repeat of the shortcut with the given \a id is enabled; otherwise it is disabled. \sa grabShortcut() releaseShortcut() */ void QWidget::setShortcutAutoRepeat(int id, bool enable) { Q_ASSERT(qApp); if (id) qApp->d_func()->shortcutMap.setShortcutAutoRepeat(enable, id, this, 0); } #endif // QT_NO_SHORTCUT /*! Updates the widget's micro focus. \sa QInputContext */ void QWidget::updateMicroFocus() { #if !defined(QT_NO_IM) && (defined(Q_WS_X11) || defined(Q_WS_QWS)) QInputContext *ic = inputContext(); if (ic) ic->update(); #endif #ifndef QT_NO_ACCESSIBILITY // ##### is this correct QAccessible::updateAccessibility(this, 0, QAccessible::StateChanged); #endif } #if defined (Q_WS_WIN) /*! Returns the window system handle of the widget, for low-level access. Using this function is not portable. An HDC acquired with getDC() has to be released with releaseDC(). \warning Using this function is not portable. */ HDC QWidget::getDC() const { Q_D(const QWidget); if (d->hd) return (HDC) d->hd; return GetDC(winId()); } /*! Releases the HDC \a hdc acquired by a previous call to getDC(). \warning Using this function is not portable. */ void QWidget::releaseDC(HDC hdc) const { Q_D(const QWidget); // If its the widgets own dc, it will be released elsewhere. If // its a different HDC we release it and issue a warning if it // fails. if (hdc != d->hd && !ReleaseDC(winId(), hdc)) qErrnoWarning("QWidget::releaseDC(): failed to release HDC"); } #else /*! Returns the window system handle of the widget, for low-level access. Using this function is not portable. The HANDLE type varies with platform; see \c qwindowdefs.h for details. */ Qt::HANDLE QWidget::handle() const { Q_D(const QWidget); return d->hd; } #endif /*! Raises this widget to the top of the parent widget's stack. After this call the widget will be visually in front of any overlapping sibling widgets. \sa lower(), stackUnder() */ void QWidget::raise() { Q_D(QWidget); if (!isWindow()) { QWidget *p = parentWidget(); const int parentChildCount = p->d_func()->children.size(); if (parentChildCount < 2) return; const int from = p->d_func()->children.indexOf(this); Q_ASSERT(from >= 0); // Do nothing if the widget is already in correct stacking order _and_ created. if (from != parentChildCount -1) p->d_func()->children.move(from, parentChildCount - 1); if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created)) create(); else if (from == parentChildCount - 1) return; } if (testAttribute(Qt::WA_WState_Created)) d->raise_sys(); QEvent e(QEvent::ZOrderChange); QApplication::sendEvent(this, &e); } /*! Lowers the widget to the bottom of the parent widget's stack. After this call the widget will be visually behind (and therefore obscured by) any overlapping sibling widgets. \sa raise(), stackUnder() */ void QWidget::lower() { Q_D(QWidget); if (!isWindow()) { QWidget *p = parentWidget(); const int parentChildCount = p->d_func()->children.size(); if (parentChildCount < 2) return; const int from = p->d_func()->children.indexOf(this); Q_ASSERT(from >= 0); // Do nothing if the widget is already in correct stacking order _and_ created. if (from != 0) p->d_func()->children.move(from, 0); if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created)) create(); else if (from == 0) return; } if (testAttribute(Qt::WA_WState_Created)) d->lower_sys(); QEvent e(QEvent::ZOrderChange); QApplication::sendEvent(this, &e); } /*! Places the widget under \a w in the parent widget's stack. To make this work, the widget itself and \a w must be siblings. \sa raise(), lower() */ void QWidget::stackUnder(QWidget* w) { Q_D(QWidget); QWidget *p = parentWidget(); if (!w || isWindow() || p != w->parentWidget() || this == w) return; if (p) { int from = p->d_func()->children.indexOf(this); int to = p->d_func()->children.indexOf(w); Q_ASSERT(from >= 0); Q_ASSERT(to >= 0); if (from < to) --to; // Do nothing if the widget is already in correct stacking order _and_ created. if (from != to) p->d_func()->children.move(from, to); if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created)) create(); else if (from == to) return; } if (testAttribute(Qt::WA_WState_Created)) d->stackUnder_sys(w); QEvent e(QEvent::ZOrderChange); QApplication::sendEvent(this, &e); } void QWidget::styleChange(QStyle&) { } void QWidget::enabledChange(bool) { } // compat void QWidget::paletteChange(const QPalette &) { } // compat void QWidget::fontChange(const QFont &) { } // compat void QWidget::windowActivationChange(bool) { } // compat void QWidget::languageChange() { } // compat /*! \enum QWidget::BackgroundOrigin \compat \value WidgetOrigin \value ParentOrigin \value WindowOrigin \value AncestorOrigin */ /*! \fn bool QWidget::isVisibleToTLW() const Use isVisible() instead. */ /*! \fn void QWidget::iconify() Use showMinimized() instead. */ /*! \fn void QWidget::constPolish() const Use ensurePolished() instead. */ /*! \fn void QWidget::reparent(QWidget *parent, Qt::WindowFlags f, const QPoint &p, bool showIt) Use setParent() to change the parent or the widget's widget flags; use move() to move the widget, and use show() to show the widget. */ /*! \fn void QWidget::reparent(QWidget *parent, const QPoint &p, bool showIt) Use setParent() to change the parent; use move() to move the widget, and use show() to show the widget. */ /*! \fn void QWidget::recreate(QWidget *parent, Qt::WindowFlags f, const QPoint & p, bool showIt) Use setParent() to change the parent or the widget's widget flags; use move() to move the widget, and use show() to show the widget. */ /*! \fn bool QWidget::hasMouse() const Use testAttribute(Qt::WA_UnderMouse) instead. */ /*! \fn bool QWidget::ownCursor() const Use testAttribute(Qt::WA_SetCursor) instead. */ /*! \fn bool QWidget::ownFont() const Use testAttribute(Qt::WA_SetFont) instead. */ /*! \fn void QWidget::unsetFont() Use setFont(QFont()) instead. */ /*! \fn bool QWidget::ownPalette() const Use testAttribute(Qt::WA_SetPalette) instead. */ /*! \fn void QWidget::unsetPalette() Use setPalette(QPalette()) instead. */ /*! \fn void QWidget::setEraseColor(const QColor &color) Use the palette instead. \oldcode widget->setEraseColor(color); \newcode QPalette palette; palette.setColor(widget->backgroundRole(), color); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setErasePixmap(const QPixmap &pixmap) Use the palette instead. \oldcode widget->setErasePixmap(pixmap); \newcode QPalette palette; palette.setBrush(widget->backgroundRole(), QBrush(pixmap)); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setPaletteForegroundColor(const QColor &color) Use the palette directly. \oldcode widget->setPaletteForegroundColor(color); \newcode QPalette palette; palette.setColor(widget->foregroundRole(), color); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setPaletteBackgroundColor(const QColor &color) Use the palette directly. \oldcode widget->setPaletteBackgroundColor(color); \newcode QPalette palette; palette.setColor(widget->backgroundRole(), color); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setPaletteBackgroundPixmap(const QPixmap &pixmap) Use the palette directly. \oldcode widget->setPaletteBackgroundPixmap(pixmap); \newcode QPalette palette; palette.setBrush(widget->backgroundRole(), QBrush(pixmap)); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setBackgroundPixmap(const QPixmap &pixmap) Use the palette instead. \oldcode widget->setBackgroundPixmap(pixmap); \newcode QPalette palette; palette.setBrush(widget->backgroundRole(), QBrush(pixmap)); widget->setPalette(palette); \endcode */ /*! \fn void QWidget::setBackgroundColor(const QColor &color) Use the palette instead. \oldcode widget->setBackgroundColor(color); \newcode QPalette palette; palette.setColor(widget->backgroundRole(), color); widget->setPalette(palette); \endcode */ /*! \fn QColorGroup QWidget::colorGroup() const Use QColorGroup(palette()) instead. */ /*! \fn QWidget *QWidget::parentWidget(bool sameWindow) const Use the no-argument overload instead. */ /*! \fn void QWidget::setKeyCompression(bool b) Use setAttribute(Qt::WA_KeyCompression, b) instead. */ /*! \fn void QWidget::setFont(const QFont &f, bool b) Use the single-argument overload instead. */ /*! \fn void QWidget::setPalette(const QPalette &p, bool b) Use the single-argument overload instead. */ /*! \fn void QWidget::setBackgroundOrigin(BackgroundOrigin background) \obsolete */ /*! \fn BackgroundOrigin QWidget::backgroundOrigin() const \obsolete Always returns \c WindowOrigin. */ /*! \fn QPoint QWidget::backgroundOffset() const \obsolete Always returns QPoint(). */ /*! \fn void QWidget::repaint(bool b) The boolean parameter \a b is ignored. Use the no-argument overload instead. */ /*! \fn void QWidget::repaint(int x, int y, int w, int h, bool b) The boolean parameter \a b is ignored. Use the four-argument overload instead. */ /*! \fn void QWidget::repaint(const QRect &r, bool b) The boolean parameter \a b is ignored. Use the single rect-argument overload instead. */ /*! \fn void QWidget::repaint(const QRegion &rgn, bool b) The boolean parameter \a b is ignored. Use the single region-argument overload instead. */ /*! \fn void QWidget::erase() Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your erasing and call update() to schedule a replaint whenever necessary. See also QPainter. */ /*! \fn void QWidget::erase(int x, int y, int w, int h) Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your erasing and call update() to schedule a replaint whenever necessary. See also QPainter. */ /*! \fn void QWidget::erase(const QRect &rect) Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your erasing and call update() to schedule a replaint whenever necessary. See also QPainter. */ /*! \fn void QWidget::drawText(const QPoint &p, const QString &s) Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your drawing and call update() to schedule a replaint whenever necessary. See also QPainter. */ /*! \fn void QWidget::drawText(int x, int y, const QString &s) Drawing may only take place in a QPaintEvent. Overload paintEvent() to do your drawing and call update() to schedule a replaint whenever necessary. See also QPainter. */ /*! \fn QWidget *QWidget::childAt(const QPoint &p, bool includeThis) const Use the single point argument overload instead. */ /*! \fn void QWidget::setCaption(const QString &c) Use setWindowTitle() instead. */ /*! \fn void QWidget::setIcon(const QPixmap &i) Use setWindowIcon() instead. */ /*! \fn void QWidget::setIconText(const QString &it) Use setWindowIconText() instead. */ /*! \fn QString QWidget::caption() const Use windowTitle() instead. */ /*! \fn QString QWidget::iconText() const Use windowIconText() instead. */ /*! \fn bool QWidget::isTopLevel() const \obsolete Use isWindow() instead. */ /*! \fn bool QWidget::isRightToLeft() const \internal */ /*! \fn bool QWidget::isLeftToRight() const \internal */ /*! \fn void QWidget::setInputMethodEnabled(bool enabled) Use setAttribute(Qt::WA_InputMethodEnabled, \a enabled) instead. */ /*! \fn bool QWidget::isInputMethodEnabled() const Use testAttribute(Qt::WA_InputMethodEnabled) instead. */ /*! \fn void QWidget::setActiveWindow() Use activateWindow() instead. */ /*! \fn bool QWidget::isShown() const Use !isHidden() instead (notice the exclamation mark), or use isVisible() to check whether the widget is visible. */ /*! \fn bool QWidget::isDialog() const Use windowType() == Qt::Dialog instead. */ /*! \fn bool QWidget::isPopup() const Use windowType() == Qt::Popup instead. */ /*! \fn bool QWidget::isDesktop() const Use windowType() == Qt::Desktop instead. */ /*! \fn void QWidget::polish() Use ensurePolished() instead. */ /*! \fn QWidget *QWidget::childAt(int x, int y, bool includeThis) const Use the childAt() overload that doesn't have an \a includeThis parameter. \oldcode return widget->childAt(x, y, true); \newcode QWidget *child = widget->childAt(x, y, true); if (child) return child; if (widget->rect().contains(x, y)) return widget; \endcode */ /*! \fn void QWidget::setSizePolicy(QSizePolicy::Policy hor, QSizePolicy::Policy ver, bool hfw) \compat Use the \l sizePolicy property and heightForWidth() function instead. */ /*! \fn bool QWidget::isUpdatesEnabled() const \compat Use the \l updatesEnabled property instead. */ /*! \macro QWIDGETSIZE_MAX \relates QWidget Defines the maximum size for a QWidget object. The largest allowed size for a widget is QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX), i.e. QSize (16777215,16777215). \sa QWidget::setMaximumSize() */ QRect QWidgetPrivate::frameStrut() const { Q_Q(const QWidget); if (!q->isWindow() || (q->windowType() == Qt::Desktop)) { // x2 = x1 + w - 1, so w/h = 1 return QRect(0, 0, 1, 1); } if (data.fstrut_dirty #ifndef Q_WS_WIN // ### Fix properly for 4.3 && q->isVisible() #endif && q->testAttribute(Qt::WA_WState_Created)) const_cast(this)->updateFrameStrut(); return maybeTopData() ? maybeTopData()->frameStrut : QRect(); } /*! \preliminary \since 4.2 \obsolete Sets the window surface to be the \a surface specified. The QWidget takes will ownership of the \a surface. widget itself is deleted. */ void QWidget::setWindowSurface(QWindowSurface *surface) { // ### createWinId() ?? #ifndef Q_BACKINGSTORE_SUBSURFACES if (!isTopLevel()) return; #endif Q_D(QWidget); QTLWExtra *topData = d->topData(); if (topData->windowSurface == surface) return; #ifndef Q_WS_MAC const QWindowSurface *oldSurface = topData->windowSurface; #endif delete topData->windowSurface; topData->windowSurface = surface; #ifndef Q_WS_MAC QWidgetBackingStore *bs = d->maybeBackingStore(); if (!bs) return; if (isTopLevel()) { if (bs->windowSurface != oldSurface && bs->windowSurface != surface) delete bs->windowSurface; bs->windowSurface = surface; } #ifdef Q_BACKINGSTORE_SUBSURFACES else { bs->subSurfaces.append(surface); } #endif #endif // Q_WS_MAC } /*! \preliminary \since 4.2 Returns the QWindowSurface this widget will be drawn into. */ QWindowSurface *QWidget::windowSurface() const { Q_D(const QWidget); QTLWExtra *extra = d->maybeTopData(); if (extra && extra->windowSurface) return extra->windowSurface; #ifdef Q_WS_MAC return 0; #else QWidgetBackingStore *bs = d->maybeBackingStore(); #ifdef Q_BACKINGSTORE_SUBSURFACES if (bs && bs->subSurfaces.isEmpty()) return bs->windowSurface; if (!isTopLevel()) { const QWidget *w = parentWidget(); while (w) { QTLWExtra *extra = w->d_func()->maybeTopData(); if (extra && extra->windowSurface) return extra->windowSurface; if (w->isTopLevel()) break; w = w->parentWidget(); } } #endif // Q_BACKINGSTORE_SUBSURFACES return bs ? bs->windowSurface : 0; #endif // Q_WS_MAC } QWidgetData *qt_qwidget_data(QWidget *widget) { return widget->data; } void QWidgetPrivate::getLayoutItemMargins(int *left, int *top, int *right, int *bottom) const { if (left) *left = (int)leftLayoutItemMargin; if (top) *top = (int)topLayoutItemMargin; if (right) *right = (int)rightLayoutItemMargin; if (bottom) *bottom = (int)bottomLayoutItemMargin; } void QWidgetPrivate::setLayoutItemMargins(int left, int top, int right, int bottom) { if (leftLayoutItemMargin == left && topLayoutItemMargin == top && rightLayoutItemMargin == right && bottomLayoutItemMargin == bottom) return; Q_Q(QWidget); leftLayoutItemMargin = (signed char)left; topLayoutItemMargin = (signed char)top; rightLayoutItemMargin = (signed char)right; bottomLayoutItemMargin = (signed char)bottom; q->updateGeometry(); } void QWidgetPrivate::setLayoutItemMargins(QStyle::SubElement element, const QStyleOption *opt) { Q_Q(QWidget); QStyleOption myOpt; if (!opt) { myOpt.initFrom(q); myOpt.rect.setRect(0, 0, 32768, 32768); // arbitrary opt = &myOpt; } QRect liRect = q->style()->subElementRect(element, opt, q); if (liRect.isValid()) { leftLayoutItemMargin = (signed char)(opt->rect.left() - liRect.left()); topLayoutItemMargin = (signed char)(opt->rect.top() - liRect.top()); rightLayoutItemMargin = (signed char)(liRect.right() - opt->rect.right()); bottomLayoutItemMargin = (signed char)(liRect.bottom() - opt->rect.bottom()); } else { leftLayoutItemMargin = 0; topLayoutItemMargin = 0; rightLayoutItemMargin = 0; bottomLayoutItemMargin = 0; } } /*! \typedef QWidgetList \relates QWidget Synonym for QList. */ #include "moc_qwidget.cpp" /*! \typedef WId \relates QWidget Platform dependent window identifier. */