/**************************************************************************** ** ** 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 "qabstracteventdispatcher.h" #include "qaccessible.h" #include "qapplication.h" #include "qclipboard.h" #include "qcursor.h" #include "qdesktopwidget.h" #include "qdir.h" #include "qevent.h" #include "qfile.h" #include "qfileinfo.h" #include "qhash.h" #include "qset.h" #include "qlayout.h" #include "qsessionmanager.h" #include "qstyle.h" #include "qstylefactory.h" #include "qtextcodec.h" #include "qtranslator.h" #include "qvariant.h" #include "qwidget.h" #include "qdnd_p.h" #include "qcolormap.h" #include "qdebug.h" #include "private/qstylesheetstyle_p.h" #include "private/qstyle_p.h" #include "qmessagebox.h" #include "qinputcontext.h" #include "qkeymapper_p.h" #ifdef Q_WS_X11 #include #include "qinputcontextfactory.h" #endif #include #include #include #include extern void qt_call_post_routines(); #include "qapplication_p.h" #include "qwidget_p.h" #include "qapplication.h" int QApplicationPrivate::app_compile_version = 0x040000; //we don't know exactly, but it's at least 4.0.0 QApplication::Type qt_appType=QApplication::Tty; QApplicationPrivate *QApplicationPrivate::self = 0; QInputContext *QApplicationPrivate::inputContext; bool QApplicationPrivate::quitOnLastWindowClosed = true; bool QApplicationPrivate::tryEmitLastWindowClosedPending = false; QApplicationPrivate::QApplicationPrivate(int &argc, char **argv, QApplication::Type type) : QCoreApplicationPrivate(argc, argv) { application_type = type; qt_appType = type; #ifndef QT_NO_SESSIONMANAGER is_session_restored = false; #endif quitOnLastWindowClosed = true; tryEmitLastWindowClosedPending = false; #ifdef QT3_SUPPORT qt_compat_used = 0; qt_compat_resolved = 0; qt_tryAccelEvent = 0; qt_tryComposeUnicode = 0; qt_dispatchAccelEvent = 0; #endif #if defined(Q_WS_QWS) && !defined(QT_NO_DIRECTPAINTER) directPainters = 0; #endif if (!self) self = this; } QApplicationPrivate::~QApplicationPrivate() { if (self == this) self = 0; } /*! \class QApplication \brief The QApplication class manages the GUI application's control flow and main settings. \ingroup application \mainclass It contains the main event loop, where all events from the window system and other sources are processed and dispatched. It also handles the application's initialization and finalization, and provides session management. It also handles most system-wide and application-wide settings. For any GUI application that uses Qt, there is precisely one QApplication object, no matter whether the application has 0, 1, 2 or more windows at any time. For non-GUI Qt applications, use QCoreApplication instead, which doesn't depend on the \l QtGui library. The QApplication object is accessible through the instance() function which return a pointer equivalent to the global qApp pointer. QApplication's main areas of responsibility are: \list \o It initializes the application with the user's desktop settings such as palette(), font() and doubleClickInterval(). It keeps track of these properties in case the user changes the desktop globally, for example through some kind of control panel. \o It performs event handling, meaning that it receives events from the underlying window system and dispatches them to the relevant widgets. By using sendEvent() and postEvent() you can send your own events to widgets. \o It parses common command line arguments and sets its internal state accordingly. See the \link QApplication::QApplication() constructor documentation\endlink below for more details about this. \o It defines the application's look and feel, which is encapsulated in a QStyle object. This can be changed at runtime with setStyle(). \o It specifies how the application is to allocate colors. See setColorSpec() for details. \o It provides localization of strings that are visible to the user via translate(). \o It provides some magical objects like the desktop() and the clipboard(). \o It knows about the application's windows. You can ask which widget is at a certain position using widgetAt(), get a list of topLevelWidgets() and closeAllWindows(), etc. \o It manages the application's mouse cursor handling, see setOverrideCursor() \o On the X window system, it provides functions to flush and sync the communication stream, see flushX() and syncX(). \o It provides support for sophisticated \link session.html session management \endlink. This makes it possible for applications to terminate gracefully when the user logs out, to cancel a shutdown process if termination isn't possible and even to preserve the entire application's state for a future session. See isSessionRestored(), sessionId() and commitData() and saveState() for details. \endlist Since the QApplication object does so much initialization, it \e{must} be created before any other objects related to the user interface are created. Since it also deals with common command line arguments, it is usually a good idea to create it \e before any interpretation or modification of \c argv is done in the application itself. \table \header \o{2,1} Groups of functions \row \o System settings \o desktopSettingsAware(), setDesktopSettingsAware(), cursorFlashTime(), setCursorFlashTime(), doubleClickInterval(), setDoubleClickInterval(), setKeyboardInputInterval(), wheelScrollLines(), setWheelScrollLines(), palette(), setPalette(), font(), setFont(), fontMetrics(). \row \o Event handling \o exec(), processEvents(), exit(), quit(). sendEvent(), postEvent(), sendPostedEvents(), removePostedEvents(), hasPendingEvents(), notify(), macEventFilter(), qwsEventFilter(), x11EventFilter(), x11ProcessEvent(), winEventFilter(). \row \o GUI Styles \o style(), setStyle(). \row \o Color usage \o colorSpec(), setColorSpec(), qwsSetCustomColors(). \row \o Text handling \o installTranslator(), removeTranslator() translate(). \row \o Widgets \o allWidgets(), topLevelWidgets(), desktop(), activePopupWidget(), activeModalWidget(), clipboard(), focusWidget(), winFocus(), activeWindow(), widgetAt(). \row \o Advanced cursor handling \o overrideCursor(), setOverrideCursor(), restoreOverrideCursor(). \row \o X Window System synchronization \o flushX(), syncX(). \row \o Session management \o isSessionRestored(), sessionId(), commitData(), saveState(). \row \o Miscellaneous \o closeAllWindows(), startingUp(), closingDown(), type(). \endtable \sa QCoreApplication, QAbstractEventDispatcher, QEventLoop, QSettings */ /*! \enum QApplication::Type \value Tty a console application \value GuiClient a GUI client application \value GuiServer a GUI server application (for Qtopia Core) */ /*! \enum QApplication::ColorSpec \value NormalColor the default color allocation policy \value CustomColor the same as NormalColor for X11; allocates colors to a palette on demand under Windows \value ManyColor the right choice for applications that use thousands of colors See setColorSpec() for full details. */ /*! \fn QWidget *QApplication::topLevelAt(const QPoint &point) Returns the top-level widget at the given \a point; returns 0 if there is no such widget. */ /*! \fn QWidget *QApplication::topLevelAt(int x, int y) \overload Returns the top-level widget at the point (\a{x}, \a{y}); returns 0 if there is no such widget. */ /* The qt_init() and qt_cleanup() functions are implemented in the qapplication_xyz.cpp file. */ void qt_init(QApplicationPrivate *priv, int type #ifdef Q_WS_X11 , Display *display = 0, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0 #endif ); void qt_cleanup(); Qt::MouseButtons QApplicationPrivate::mouse_buttons = Qt::NoButton; Qt::KeyboardModifiers QApplicationPrivate::modifier_buttons = Qt::NoModifier; QStyle *QApplicationPrivate::app_style = 0; // default application style #ifndef QT_NO_STYLE_STYLESHEET QString QApplicationPrivate::styleSheet; // default application stylesheet #endif int QApplicationPrivate::app_cspec = QApplication::NormalColor; QPalette *QApplicationPrivate::app_pal = 0; // default application palette QPalette *QApplicationPrivate::sys_pal = 0; // default system palette QPalette *QApplicationPrivate::set_pal = 0; // default palette set by programmer QFont *QApplicationPrivate::app_font = 0; // default application font QFont *QApplicationPrivate::sys_font = 0; // default system font QFont *QApplicationPrivate::set_font = 0; // default font set by programmer QIcon *QApplicationPrivate::app_icon = 0; QWidget *QApplicationPrivate::main_widget = 0; // main application widget QWidget *QApplicationPrivate::focus_widget = 0; // has keyboard input focus QWidget *QApplicationPrivate::hidden_focus_widget = 0; // will get keyboard input focus after show() QWidget *QApplicationPrivate::active_window = 0; // toplevel with keyboard focus bool QApplicationPrivate::obey_desktop_settings = true; // use winsys resources int QApplicationPrivate::cursor_flash_time = 1000; // text caret flash time int QApplicationPrivate::mouse_double_click_time = 400; // mouse dbl click limit int QApplicationPrivate::keyboard_input_time = 400; // keyboard input interval #ifndef QT_NO_WHEELEVENT int QApplicationPrivate::wheel_scroll_lines = 3; // number of lines to scroll #endif bool qt_is_gui_used; bool Q_GUI_EXPORT qt_tab_all_widgets = true; bool qt_in_tab_key_event = false; int qt_antialiasing_threshold = -1; static int drag_time = 500; static int drag_distance = 4; static Qt::LayoutDirection layout_direction = Qt::LeftToRight; QSize QApplicationPrivate::app_strut = QSize(0,0); // no default application strut bool QApplicationPrivate::animate_ui = true; bool QApplicationPrivate::animate_menu = false; bool QApplicationPrivate::fade_menu = false; bool QApplicationPrivate::animate_combo = false; bool QApplicationPrivate::animate_tooltip = false; bool QApplicationPrivate::fade_tooltip = false; bool QApplicationPrivate::animate_toolbox = false; bool QApplicationPrivate::widgetCount = false; QString* QApplicationPrivate::styleOverride = 0; #ifdef QT_KEYPAD_NAVIGATION bool QApplicationPrivate::keypadNavigation = false; QWidget *QApplicationPrivate::oldEditFocus = 0; #endif bool qt_tabletChokeMouse = false; static bool force_reverse = false; // ######## move to QApplicationPrivate // Default application palettes and fonts (per widget type) typedef QHash PaletteHash; Q_GLOBAL_STATIC(PaletteHash, app_palettes) PaletteHash *qt_app_palettes_hash() { return app_palettes(); } typedef QHash FontHash; Q_GLOBAL_STATIC(FontHash, app_fonts) FontHash *qt_app_fonts_hash() { return app_fonts(); } QWidgetList *QApplicationPrivate::popupWidgets = 0; // has keyboard input focus QDesktopWidget *qt_desktopWidget = 0; // root window widgets #ifndef QT_NO_CLIPBOARD QClipboard *qt_clipboard = 0; // global clipboard object #endif QWidgetList * qt_modal_stack=0; // stack of modal widgets /*! \internal */ void QApplicationPrivate::process_cmdline() { Q_Q(QApplication); Q_UNUSED(q);// only static members being used. // process platform-indep command line if (!qt_is_gui_used || !argc) return; int i, j; j = 1; for (i=1; i= 0) { session_key = session_id.mid(p +1); session_id = session_id.left(p); } is_session_restored = true; } #endif #ifndef QT_NO_STYLE_STYLESHEET } else if (arg == "-stylesheet" && i < argc -1) { styleSheet = QLatin1String("file:///"); styleSheet.append(QString::fromLocal8Bit(argv[++i])); } else if (arg.indexOf("-stylesheet=") != -1) { styleSheet = QLatin1String("file:///"); styleSheet.append(QString::fromLocal8Bit(arg.right(arg.length() - 12))); #endif } else if (qstrcmp(arg, "-reverse") == 0) { force_reverse = true; q->setLayoutDirection(Qt::RightToLeft); } else if (qstrcmp(arg, "-widgetcount") == 0) { widgetCount = true; } else { argv[j++] = argv[i]; } if (!s.isEmpty()) { if (app_style) { delete app_style; app_style = 0; } if (!styleOverride) styleOverride = new QString; *styleOverride = s; } } if(j < argc) { argv[j] = 0; argc = j; } } /*! Initializes the window system and constructs an application object with \a argc command line arguments in \a argv. \warning The data pointed to by \a argc and \a argv must stay valid for the entire lifetime of the QApplication object. The global \c qApp pointer refers to this application object. Only one application object should be created. This application object must be constructed before any \link QPaintDevice paint devices\endlink (including widgets, pixmaps, bitmaps etc.). Note that \a argc and \a argv might be changed. Qt removes command line arguments that it recognizes. The original \a argc and \a argv can be accessed later with arguments(). Qt debugging options (not available if Qt was compiled without the QT_DEBUG flag defined): \list \o -nograb, tells Qt that it must never grab the mouse or the keyboard. \o -dograb (only under X11), running under a debugger can cause an implicit -nograb, use -dograb to override. \o -sync (only under X11), switches to synchronous mode for debugging. \endlist See \link debug.html Debugging Techniques \endlink for a more detailed explanation. All Qt programs automatically support the following command line options: \list \o -style= \e style, sets the application GUI style. Possible values are \c motif, \c windows, and \c platinum. If you compiled Qt with additional styles or have additional styles as plugins these will be available to the \c -style command line option. \o -style \e style, is the same as listed above. \o -stylesheet= \e stylesheet, sets the application \l styleSheet. The value must be a path to a file that contains the Style Sheet. Note that relative URLs in the Style Sheet file are relative to the Style Sheet file's path. \o -stylesheet \e stylesheet, is the same as listed above. \o -session= \e session, restores the application from an earlier \link session.html session \endlink. \o -session \e session, is the same as listed above. \o -widgetcount, prints debug message at the end about number of widgets left undestroyed and maximum number of widgets existed at the same time \o -reverse, sets the application's layout direction to Qt::RightToLeft \endlist The Windows version of Qt also support one additional command line option, if Direct3D support has been compiled into Qt: \list \o -direct3d will make the Direct3D paint engine the default widget paint engine in Qt. \bold {This functionality is experimental.} \endlist The X11 version of Qt also supports some traditional X11 command line options: \list \o -display \e display, sets the X display (default is $DISPLAY). \o -geometry \e geometry, sets the client geometry of the first window that is shown. \o -fn or \c -font \e font, defines the application font. The font should be specified using an X logical font description. \o -bg or \c -background \e color, sets the default background color and an application palette (light and dark shades are calculated). \o -fg or \c -foreground \e color, sets the default foreground color. \o -btn or \c -button \e color, sets the default button color. \o -name \e name, sets the application name. \o -title \e title, sets the application title. \o -visual \c TrueColor, forces the application to use a TrueColor visual on an 8-bit display. \o -ncols \e count, limits the number of colors allocated in the color cube on an 8-bit display, if the application is using the QApplication::ManyColor color specification. If \e count is 216 then a 6x6x6 color cube is used (i.e. 6 levels of red, 6 of green, and 6 of blue); for other values, a cube approximately proportional to a 2x3x1 cube is used. \o -cmap, causes the application to install a private color map on an 8-bit display. \o -im, sets the input method server (equivalent to setting the XMODIFIERS environment variable) \o -noxim, disables the input method framework ("no X input method"). \o -inputstyle, defines how the input is inserted into the given widget. E.g., \c onTheSpot makes the input appear directly in the widget, while \c overTheSpot makes the input appear in a box floating over the widget and is not inserted until the editing is done. \endlist \sa arguments() */ QApplication::QApplication(int &argc, char **argv) : QCoreApplication(*new QApplicationPrivate(argc, argv, GuiClient)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, int _internal) : QCoreApplication(*new QApplicationPrivate(argc, argv, GuiClient)) { Q_D(QApplication); d->construct(); QApplicationPrivate::app_compile_version = _internal;} /*! Constructs an application object with \a argc command line arguments in \a argv. If \a GUIenabled is true, a GUI application is constructed, otherwise a non-GUI (console) application is created. Set \a GUIenabled to false for programs without a graphical user interface that should be able to run without a window system. On X11, the window system is initialized if \a GUIenabled is true. If \a GUIenabled is false, the application does not connect to the X server. On Windows and Macintosh, currently the window system is always initialized, regardless of the value of GUIenabled. This may change in future versions of Qt. The following example shows how to create an application that uses a graphical interface when available. \code int main(int argc, char **argv) { #ifdef Q_WS_X11 bool useGUI = getenv("DISPLAY") != 0; #else bool useGUI = true; #endif QApplication app(argc, argv, useGUI); if (useGUI) { // start GUI version ... } else { // start non-GUI version ... } return app.exec(); } \endcode */ QApplication::QApplication(int &argc, char **argv, bool GUIenabled ) : QCoreApplication(*new QApplicationPrivate(argc, argv, GUIenabled ? GuiClient : Tty)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, bool GUIenabled , int _internal) : QCoreApplication(*new QApplicationPrivate(argc, argv, GUIenabled ? GuiClient : Tty)) { Q_D(QApplication); d->construct(); QApplicationPrivate::app_compile_version = _internal;} /*! Constructs an application object with \a argc command line arguments in \a argv. For Qtopia Core, passing QApplication::GuiServer for \a type makes this application the server (equivalent to running with the \c -qws option). */ QApplication::QApplication(int &argc, char **argv, Type type) : QCoreApplication(*new QApplicationPrivate(argc, argv, type)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, Type type , int _internal) : QCoreApplication(*new QApplicationPrivate(argc, argv, type)) { Q_D(QApplication); d->construct(); QApplicationPrivate::app_compile_version = _internal;} /*! \internal */ void QApplicationPrivate::construct( #ifdef Q_WS_X11 Display *dpy, Qt::HANDLE visual, Qt::HANDLE cmap #endif ) { Q_INIT_RESOURCE(qstyle); #if !defined(QT_NO_DIRECT3D) && defined(Q_WS_WIN) Q_INIT_RESOURCE(qpaintengine_d3d); #endif qt_is_gui_used = (qt_appType != QApplication::Tty); process_cmdline(); // Must be called before initialize() qt_init(this, qt_appType #ifdef Q_WS_X11 , dpy, visual, cmap #endif ); initialize(); eventDispatcher->startingUp(); #ifdef QT_EVAL extern void qt_gui_eval_init(uint); qt_gui_eval_init(application_type); #endif } #if defined(Q_WS_X11) // ### a string literal is a cont char* // ### using it as a char* is wrong and could lead to segfaults // ### if aargv is modified someday // ########## make it work with argc == argv == 0 static int aargc = 1; static char *aargv[] = { (char*)"unknown", 0 }; /*! \fn QApplication::QApplication(Display* display, Qt::HANDLE visual, Qt::HANDLE colormap) Create an application, given an already open display \a display. If \a visual and \a colormap are non-zero, the application will use those as the default Visual and Colormap contexts. \warning Qt only supports TrueColor visuals at depths higher than 8 bits-per-pixel. This is available only on X11. */ QApplication::QApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE colormap) : QCoreApplication(*new QApplicationPrivate(aargc, aargv, GuiClient)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); } QApplication::QApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE colormap, int _internal) : QCoreApplication(*new QApplicationPrivate(aargc, aargv, GuiClient)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); QApplicationPrivate::app_compile_version = _internal; } /*! \fn QApplication::QApplication(Display *display, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap) Create an application, given an already open \a display and using \a argc command line arguments in \a argv. If \a visual and \a colormap are non-zero, the application will use those as the default Visual and Colormap contexts. \warning Qt only supports TrueColor visuals at depths higher than 8 bits-per-pixel. This is available only on X11. */ QApplication::QApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap) : QCoreApplication(*new QApplicationPrivate(argc, argv, GuiClient)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); } QApplication::QApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap, int _internal) : QCoreApplication(*new QApplicationPrivate(argc, argv, GuiClient)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); QApplicationPrivate::app_compile_version = _internal; } #endif // Q_WS_X11 /*! Initializes the QApplication object, called from the constructors. */ void QApplicationPrivate::initialize() { QWidgetPrivate::mapper = new QWidgetMapper; QWidgetPrivate::uncreatedWidgets = new QWidgetSet; if (qt_appType != QApplication::Tty) (void) QApplication::style(); // trigger creation of application style // trigger registering of QVariant's GUI types extern int qRegisterGuiVariant(); qRegisterGuiVariant(); is_app_running = true; // no longer starting up #ifndef QT_NO_SESSIONMANAGER // connect to the session manager Q_Q(QApplication); session_manager = new QSessionManager(q, session_id, session_key); #endif } /*! Returns the type of application (\l Tty, GuiClient, or GuiServer). The type is set when constructing the QApplication object. */ QApplication::Type QApplication::type() { return qt_appType; } /***************************************************************************** Functions returning the active popup and modal widgets. *****************************************************************************/ /*! Returns the active popup widget. A popup widget is a special top-level widget that sets the \c Qt::WType_Popup widget flag, e.g. the QMenu widget. When the application opens a popup widget, all events are sent to the popup. Normal widgets and modal widgets cannot be accessed before the popup widget is closed. Only other popup widgets may be opened when a popup widget is shown. The popup widgets are organized in a stack. This function returns the active popup widget at the top of the stack. \sa activeModalWidget(), topLevelWidgets() */ QWidget *QApplication::activePopupWidget() { return QApplicationPrivate::popupWidgets && !QApplicationPrivate::popupWidgets->isEmpty() ? QApplicationPrivate::popupWidgets->last() : 0; } /*! Returns the active modal widget. A modal widget is a special top-level widget which is a subclass of QDialog that specifies the modal parameter of the constructor as true. A modal widget must be closed before the user can continue with other parts of the program. Modal widgets are organized in a stack. This function returns the active modal widget at the top of the stack. \sa activePopupWidget(), topLevelWidgets() */ QWidget *QApplication::activeModalWidget() { return qt_modal_stack && !qt_modal_stack->isEmpty() ? qt_modal_stack->first() : 0; } /*! Cleans up any window system resources that were allocated by this application. Sets the global variable \c qApp to 0. */ QApplication::~QApplication() { Q_D(QApplication); #ifndef QT_NO_CLIPBOARD // flush clipboard contents if (qt_clipboard) { QEvent event(QEvent::Clipboard); QApplication::sendEvent(qt_clipboard, &event); } #endif //### this should probable be done even later qt_call_post_routines(); // kill timers before closing down the dispatcher d->toolTipWakeUp.stop(); d->toolTipFallAsleep.stop(); d->eventDispatcher->closingDown(); d->eventDispatcher = 0; delete qt_desktopWidget; qt_desktopWidget = 0; QApplicationPrivate::is_app_closing = true; QApplicationPrivate::is_app_running = false; #ifndef QT_NO_CLIPBOARD delete qt_clipboard; qt_clipboard = 0; #endif // delete widget mapper if (QWidgetPrivate::mapper) { QWidgetMapper * myMapper = QWidgetPrivate::mapper; QWidgetPrivate::mapper = 0; for (QWidgetMapper::Iterator it = myMapper->begin(); it != myMapper->end(); ++it) { register QWidget *w = *it; if (!w->parent()) // window w->destroy(true, true); } delete myMapper; } // delete uncreated widgets if (QWidgetPrivate::uncreatedWidgets) { QWidgetSet *mySet = QWidgetPrivate::uncreatedWidgets; QWidgetPrivate::uncreatedWidgets = 0; for (QWidgetSet::Iterator it = mySet->begin(); it != mySet->end(); ++it) { register QWidget *w = *it; if (!w->parent()) // window w->destroy(true, true); } delete mySet; } delete QApplicationPrivate::app_pal; QApplicationPrivate::app_pal = 0; delete QApplicationPrivate::sys_pal; QApplicationPrivate::sys_pal = 0; delete QApplicationPrivate::set_pal; QApplicationPrivate::set_pal = 0; app_palettes()->clear(); delete QApplicationPrivate::app_font; QApplicationPrivate::app_font = 0; delete QApplicationPrivate::set_font; QApplicationPrivate::set_font = 0; app_fonts()->clear(); delete QApplicationPrivate::app_style; QApplicationPrivate::app_style = 0; delete QApplicationPrivate::app_icon; QApplicationPrivate::app_icon = 0; #ifndef QT_NO_CURSOR d->cursor_list.clear(); #endif #ifndef QT_NO_DRAGANDDROP if (qt_is_gui_used) delete QDragManager::self(); #endif qt_cleanup(); if (QApplicationPrivate::widgetCount) qDebug("Widgets left: %i Max widgets: %i \n", QWidgetPrivate::instanceCounter, QWidgetPrivate::maxInstances); #ifndef QT_NO_SESSIONMANAGER delete d->session_manager; d->session_manager = 0; #endif //QT_NO_SESSIONMANAGER QApplicationPrivate::obey_desktop_settings = true; QApplicationPrivate::cursor_flash_time = 1000; QApplicationPrivate::mouse_double_click_time = 400; QApplicationPrivate::keyboard_input_time = 400; #ifndef QT_NO_WHEELEVENT QApplicationPrivate::wheel_scroll_lines = 3; #endif drag_time = 500; drag_distance = 4; layout_direction = Qt::LeftToRight; QApplicationPrivate::app_strut = QSize(0, 0); QApplicationPrivate::animate_ui = true; QApplicationPrivate::animate_menu = false; QApplicationPrivate::fade_menu = false; QApplicationPrivate::animate_combo = false; QApplicationPrivate::animate_tooltip = false; QApplicationPrivate::fade_tooltip = false; QApplicationPrivate::widgetCount = false; // trigger unregistering of QVariant's GUI types extern int qUnregisterGuiVariant(); qUnregisterGuiVariant(); } /*! \fn QWidget *QApplication::widgetAt(const QPoint &point) Returns the widget at global screen position \a point, or 0 if there is no Qt widget there. This function can be slow. \sa QCursor::pos(), QWidget::grabMouse(), QWidget::grabKeyboard() */ QWidget *QApplication::widgetAt(const QPoint &p) { QWidget *window = QApplication::topLevelAt(p); if (!window) return 0; QWidget *child = 0; if (!window->testAttribute(Qt::WA_TransparentForMouseEvents)) child = window->childAt(window->mapFromGlobal(p)); if (child) return child; if (window->testAttribute(Qt::WA_TransparentForMouseEvents)) { //shoot a hole in the widget and try once again, //suboptimal on Qt/E where we do know the stacking order //of the toplevels. int x = p.x(); int y = p.y(); QRegion oldmask = window->mask(); QPoint wpoint = window->mapFromGlobal(QPoint(x, y)); QRegion newmask = (oldmask.isEmpty() ? QRegion(window->rect()) : oldmask) - QRegion(wpoint.x(), wpoint.y(), 1, 1); window->setMask(newmask); QWidget *recurse = 0; if (QApplication::topLevelAt(p) != window) // verify recursion will terminate recurse = widgetAt(x, y); if (oldmask.isEmpty()) window->clearMask(); else window->setMask(oldmask); return recurse; } return window; } /*! \fn QWidget *QApplication::widgetAt(int x, int y) \overload Returns the widget at global screen position (\a x, \a y), or 0 if there is no Qt widget there. */ /*! \fn void QApplication::setArgs(int argc, char **argv) \internal */ /*! \internal */ bool QApplication::compressEvent(QEvent *event, QObject *receiver, QPostEventList *postedEvents) { if ((event->type() == QEvent::UpdateRequest #ifdef QT3_SUPPORT || event->type() == QEvent::LayoutHint #endif || event->type() == QEvent::LayoutRequest || event->type() == QEvent::Resize || event->type() == QEvent::Move || event->type() == QEvent::LanguageChange || event->type() == QEvent::InputMethod)) { for (int i = 0; i < postedEvents->size(); ++i) { const QPostEvent &cur = postedEvents->at(i); if (cur.receiver != receiver || cur.event == 0 || cur.event->type() != event->type()) continue; if (cur.event->type() == QEvent::LayoutRequest #ifdef QT3_SUPPORT || cur.event->type() == QEvent::LayoutHint #endif || cur.event->type() == QEvent::UpdateRequest) { ; } else if (cur.event->type() == QEvent::Resize) { ((QResizeEvent *)(cur.event))->s = ((QResizeEvent *)event)->s; } else if (cur.event->type() == QEvent::Move) { ((QMoveEvent *)(cur.event))->p = ((QMoveEvent *)event)->p; } else if (cur.event->type() == QEvent::LanguageChange) { ; } else if ( cur.event->type() == QEvent::InputMethod ) { *(QInputMethodEvent *)(cur.event) = *(QInputMethodEvent *)event; } else { continue; } delete event; return true; } return false; } return QCoreApplication::compressEvent(event, receiver, postedEvents); } #ifndef QT_NO_STYLE_STYLESHEET /*! \property QApplication::styleSheet \brief the application style sheet \since 4.2 \sa QWidget::setStyle(), {Qt Style Sheets} */ QString QApplication::styleSheet() const { return QApplicationPrivate::styleSheet; } void QApplication::setStyleSheet(const QString& styleSheet) { QApplicationPrivate::styleSheet = styleSheet; QStyleSheetStyle *proxy = qobject_cast(QApplicationPrivate::app_style); if (styleSheet.isEmpty()) { // application style sheet removed if (!proxy) return; // there was no stylesheet before setStyle(proxy->base); } else if (proxy) { // style sheet update, just repolish proxy->repolish(qApp); } else { // stylesheet set the first time QStyleSheetStyle *newProxy = new QStyleSheetStyle(QApplicationPrivate::app_style); QApplicationPrivate::app_style->setParent(newProxy); setStyle(newProxy); } } #endif // QT_NO_STYLE_STYLESHEET /*! Returns the application's style object. \sa setStyle(), QStyle */ QStyle *QApplication::style() { if (QApplicationPrivate::app_style) return QApplicationPrivate::app_style; if (!qt_is_gui_used) qFatal("No style available in non-gui applications!"); #if defined(Q_WS_X11) if(!QApplicationPrivate::styleOverride) QApplicationPrivate::x11_initialize_style(); // run-time search for default style #endif if (!QApplicationPrivate::app_style) { // Compile-time search for default style // QString style; if (QApplicationPrivate::styleOverride) { style = *QApplicationPrivate::styleOverride; delete QApplicationPrivate::styleOverride; QApplicationPrivate::styleOverride = 0; } else { #if defined(Q_WS_WIN) && defined(Q_OS_TEMP) style = QLatin1String("PocketPC"); #elif defined(Q_WS_WIN) if ((QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA && QSysInfo::WindowsVersion < QSysInfo::WV_NT_based)) style = QLatin1String("WindowsVista"); else if ((QSysInfo::WindowsVersion >= QSysInfo::WV_XP && QSysInfo::WindowsVersion < QSysInfo::WV_NT_based)) style = QLatin1String("WindowsXP"); else style = QLatin1String("Windows"); // default styles for Windows #elif defined(Q_WS_X11) && defined(Q_OS_SOLARIS) style = QLatin1String("CDE"); // default style for X11 on Solaris #elif defined(Q_WS_X11) && defined(Q_OS_IRIX) style = QLatin1String("SGI"); // default style for X11 on IRIX #elif defined(Q_WS_X11) || defined(Q_WS_QWS) style = QLatin1String("Plastique"); // default style for X11 and small devices #elif defined(Q_WS_MAC) style = QLatin1String("Macintosh"); // default style for all Mac's #endif } QStyle *&app_style = QApplicationPrivate::app_style; app_style = QStyleFactory::create(style); if (!app_style) { QStringList styles = QStyleFactory::keys(); for (int i = 0; i < styles.size(); ++i) { if ((app_style = QStyleFactory::create(styles.at(i)))) break; } } if (!app_style) qFatal("No styles available!"); } // take ownership of the style QApplicationPrivate::app_style->setParent(qApp); if (!QApplicationPrivate::sys_pal) QApplicationPrivate::setSystemPalette(QApplicationPrivate::app_style->standardPalette()); if (QApplicationPrivate::set_pal) // repolish set palette with the new style QApplication::setPalette(*QApplicationPrivate::set_pal); #ifndef QT_NO_STYLE_STYLESHEET if (!QApplicationPrivate::styleSheet.isEmpty()) { qApp->setStyleSheet(QApplicationPrivate::styleSheet); } else #endif QApplicationPrivate::app_style->polish(qApp); return QApplicationPrivate::app_style; } /*! Sets the application's GUI style to \a style. Ownership of the style object is transferred to QApplication, so QApplication will delete the style object on application exit or when a new style is set. Example usage: \code QApplication::setStyle(new QWindowsStyle); \endcode When switching application styles, the color palette is set back to the initial colors or the system defaults. This is necessary since certain styles have to adapt the color palette to be fully style-guide compliant. Note that setting the style before a palette has been set (i.e. before creating QApplication) will cause the application to use QStyle::standardPalette() for the palette. \sa style(), QStyle, setPalette(), desktopSettingsAware() */ void QApplication::setStyle(QStyle *style) { if (!style || style == QApplicationPrivate::app_style) return; QWidgetList all = allWidgets(); // clean up the old style if (QApplicationPrivate::app_style) { if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { register QWidget *w = *it; if (!(w->windowType() == Qt::Desktop) && // except desktop w->testAttribute(Qt::WA_WState_Polished)) { // has been polished QApplicationPrivate::app_style->unpolish(w); } } } QApplicationPrivate::app_style->unpolish(qApp); } QStyle *old = QApplicationPrivate::app_style; // save #ifndef QT_NO_STYLE_STYLESHEET if (!QApplicationPrivate::styleSheet.isEmpty() && !qobject_cast(style)) { // we have a stylesheet already and a new style is being set QStyleSheetStyle *newProxy = new QStyleSheetStyle(style); style->setParent(newProxy); QApplicationPrivate::app_style = newProxy; } else #endif // QT_NO_STYLE_STYLESHEET QApplicationPrivate::app_style = style; QApplicationPrivate::app_style->setParent(qApp); // take ownership // take care of possible palette requirements of certain gui // styles. Do it before polishing the application since the style // might call QApplication::setPalette() itself if (QApplicationPrivate::set_pal) { QApplication::setPalette(*QApplicationPrivate::set_pal); } else if (QApplicationPrivate::sys_pal) { QApplicationPrivate::initializeWidgetPaletteHash(); QApplicationPrivate::setPalette_helper(*QApplicationPrivate::sys_pal, /*className=*/0, /*clearWidgetPaletteHash=*/false); } else if (!QApplicationPrivate::sys_pal) { // Initialize the sys_pal if it hasn't happened yet... QApplicationPrivate::setSystemPalette(QApplicationPrivate::app_style->standardPalette()); } // initialize the application with the new style QApplicationPrivate::app_style->polish(qApp); // re-polish existing widgets if necessary if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { for (QWidgetList::ConstIterator it1 = all.constBegin(); it1 != all.constEnd(); ++it1) { register QWidget *w = *it1; if (w->windowType() != Qt::Desktop && w->testAttribute(Qt::WA_WState_Polished)) { if (w->style() == QApplicationPrivate::app_style) QApplicationPrivate::app_style->polish(w); // repolish #ifndef QT_NO_STYLE_STYLESHEET else w->setStyleSheet(w->styleSheet()); // touch #endif } } for (QWidgetList::ConstIterator it2 = all.constBegin(); it2 != all.constEnd(); ++it2) { register QWidget *w = *it2; if (w->windowType() != Qt::Desktop && !w->testAttribute(Qt::WA_SetStyle)) { QEvent e(QEvent::StyleChange); QApplication::sendEvent(w, &e); #ifdef QT3_SUPPORT if (old) w->styleChange(*old); #endif w->update(); } } } #ifndef QT_NO_STYLE_STYLESHEET if (QStyleSheetStyle *oldProxy = qobject_cast(old)) { oldProxy->deref(); } else #endif if (old && old->parent() == qApp) { delete old; } if (QApplicationPrivate::focus_widget) { QFocusEvent in(QEvent::FocusIn, Qt::OtherFocusReason); QApplication::sendEvent(QApplicationPrivate::focus_widget->style(), &in); QApplicationPrivate::focus_widget->update(); } } /*! \overload Requests a QStyle object for \a style from the QStyleFactory. The string must be one of the QStyleFactory::keys(), typically one of "windows", "motif", "cde", "plastique", "windowsxp", or "macintosh". Style names are case insensitive. Returns 0 if an unknown \a style is passed, otherwise the QStyle object returned is set as the application's GUI style. \warning To ensure that the application's style is set correctly, it is best to call this function before the QApplication constructor, if possible. */ QStyle* QApplication::setStyle(const QString& style) { QStyle *s = QStyleFactory::create(style); if (!s) return 0; setStyle(s); return s; } /*! Returns the color specification. \sa QApplication::setColorSpec() */ int QApplication::colorSpec() { return QApplicationPrivate::app_cspec; } /*! Sets the color specification for the application to \a spec. The color specification controls how the application allocates colors when run on a display with a limited amount of colors, e.g. 8 bit / 256 color displays. The color specification must be set before you create the QApplication object. The options are: \list \o QApplication::NormalColor. This is the default color allocation strategy. Use this option if your application uses buttons, menus, texts and pixmaps with few colors. With this option, the application uses system global colors. This works fine for most applications under X11, but on Windows machines it may cause dithering of non-standard colors. \o QApplication::CustomColor. Use this option if your application needs a small number of custom colors. On X11, this option is the same as NormalColor. On Windows, Qt creates a Windows palette, and allocates colors to it on demand. \o QApplication::ManyColor. Use this option if your application is very color hungry (e.g. it requires thousands of colors). Under X11 the effect is: \list \o For 256-color displays which have at best a 256 color true color visual, the default visual is used, and colors are allocated from a color cube. The color cube is the 6x6x6 (216 color) "Web palette" (the red, green, and blue components always have one of the following values: 0x00, 0x33, 0x66, 0x99, 0xCC, or 0xFF), but the number of colors can be changed by the \e -ncols option. The user can force the application to use the true color visual with the \link QApplication::QApplication() -visual \endlink option. \o For 256-color displays which have a true color visual with more than 256 colors, use that visual. Silicon Graphics X servers have this feature, for example. They provide an 8 bit visual by default but can deliver true color when asked. \endlist On Windows, Qt creates a Windows palette, and fills it with a color cube. \endlist Be aware that the CustomColor and ManyColor choices may lead to colormap flashing: The foreground application gets (most) of the available colors, while the background windows will look less attractive. Example: \code int main(int argc, char *argv[]) { QApplication::setColorSpec(QApplication::ManyColor); QApplication app(argc, argv); ... return app.exec(); } \endcode \sa colorSpec() */ void QApplication::setColorSpec(int spec) { if (qApp) qWarning("QApplication::setColorSpec: This function must be " "called before the QApplication object is created"); QApplicationPrivate::app_cspec = spec; } /*! \property QApplication::globalStrut \brief the minimum size that any GUI element that the user can interact with should have For example no button should be resized to be smaller than the global strut size. The strut size should be considered when reimplementing GUI controls that may be used on touch-screens or similar I/O devices. Example: \code QSize MyWidget::sizeHint() const { return QSize(80, 25).expandedTo(QApplication::globalStrut()); } \endcode */ QSize QApplication::globalStrut() { return QApplicationPrivate::app_strut; } void QApplication::setGlobalStrut(const QSize& strut) { QApplicationPrivate::app_strut = strut; } /*! Returns the application palette. \sa setPalette(), QWidget::palette() */ QPalette QApplication::palette() { if (!QApplicationPrivate::app_pal) QApplicationPrivate::app_pal = new QPalette(Qt::black); return *QApplicationPrivate::app_pal; } /*! \fn QPalette QApplication::palette(const QWidget* widget) \overload If a \a widget is passed, the default palette for the widget's class is returned. This may or may not be the application palette. In most cases there isn't a special palette for certain types of widgets, but one notable exception is the popup menu under Windows, if the user has defined a special background color for menus in the display settings. \sa setPalette(), QWidget::palette() */ QPalette QApplication::palette(const QWidget* w) { PaletteHash *hash = app_palettes(); if (w && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(w->metaObject()->className()); if (it != hash->constEnd()) return *it; for (it = hash->constBegin(); it != hash->constEnd(); ++it) { if (w->inherits(it.key())) return it.value(); } } return palette(); } /*! \overload Returns the palette for widgets of the given \a className. \sa setPalette(), QWidget::palette() */ QPalette QApplication::palette(const char *className) { if (!QApplicationPrivate::app_pal) palette(); PaletteHash *hash = app_palettes(); if (className && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(className); if (it != hash->constEnd()) return *it; } return *QApplicationPrivate::app_pal; } void QApplicationPrivate::setPalette_helper(const QPalette &palette, const char* className, bool clearWidgetPaletteHash) { QPalette pal = palette; if (QApplicationPrivate::app_style) QApplicationPrivate::app_style->polish(pal); // NB: non-const reference bool all = false; PaletteHash *hash = app_palettes(); if (!className) { if (QApplicationPrivate::app_pal && pal.isCopyOf(*QApplicationPrivate::app_pal)) return; if (!QApplicationPrivate::app_pal) QApplicationPrivate::app_pal = new QPalette(pal); else *QApplicationPrivate::app_pal = pal; if (hash && hash->size()) { all = true; if (clearWidgetPaletteHash) hash->clear(); } } else if (hash) { hash->insert(className, pal); } if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { QEvent e(QEvent::ApplicationPaletteChange); QWidgetList wids = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = wids.constBegin(); it != wids.constEnd(); ++it) { register QWidget *w = *it; if (all || (!className && w->isWindow()) || w->inherits(className)) // matching class QApplication::sendEvent(w, &e); } } if (!className && (!QApplicationPrivate::sys_pal || !palette.isCopyOf(*QApplicationPrivate::sys_pal))) { if (!QApplicationPrivate::set_pal) QApplicationPrivate::set_pal = new QPalette(palette); else *QApplicationPrivate::set_pal = palette; } } /*! Changes the default application palette to \a palette. If \a className is passed, the change applies only to widgets that inherit \a className (as reported by QObject::inherits()). If \a className is left 0, the change affects all widgets, thus overriding any previously set class specific palettes. The palette may be changed according to the current GUI style in QStyle::polish(). \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 QWidget::setPalette(), palette(), QStyle::polish() */ void QApplication::setPalette(const QPalette &palette, const char* className) { QApplicationPrivate::setPalette_helper(palette, className, /*clearWidgetPaletteHash=*/ true); } void QApplicationPrivate::setSystemPalette(const QPalette &pal) { QPalette adjusted; #if 0 // adjust the system palette to avoid dithering QColormap cmap = QColormap::instance(); if (cmap.depths() > 4 && cmap.depths() < 24) { for (int g = 0; g < QPalette::NColorGroups; g++) for (int i = 0; i < QPalette::NColorRoles; i++) { QColor color = pal.color((QPalette::ColorGroup)g, (QPalette::ColorRole)i); color = cmap.colorAt(cmap.pixel(color)); adjusted.setColor((QPalette::ColorGroup)g, (QPalette::ColorRole) i, color); } } #else adjusted = pal; #endif if (!sys_pal) sys_pal = new QPalette(adjusted); else *sys_pal = adjusted; if (!QApplicationPrivate::set_pal) QApplication::setPalette(*sys_pal); } /*! Returns the default application font. \sa fontMetrics(), QWidget::font() */ QFont QApplication::font() { if (!QApplicationPrivate::app_font) QApplicationPrivate::app_font = new QFont(QLatin1String("Helvetica")); return *QApplicationPrivate::app_font; } /*! \overload Returns the default font for the \a widget. \sa fontMetrics(), QWidget::setFont() */ QFont QApplication::font(const QWidget *widget) { FontHash *hash = app_fonts(); if (widget && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(widget->metaObject()->className()); if (it != hash->constEnd()) return it.value(); for (it = hash->constBegin(); it != hash->constEnd(); ++it) { if (widget->inherits(it.key())) return it.value(); } } return font(); } /*! \overload Returns the font for widgets of the given \a className. \sa setFont(), QWidget::font() */ QFont QApplication::font(const char *className) { FontHash *hash = app_fonts(); if (className && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(className); if (it != hash->constEnd()) return *it; } return font(); } /*! Changes the default application font to \a font. If \a className is passed, the change applies only to classes that inherit \a className (as reported by QObject::inherits()). On application start-up, the default font depends on the window system. It can vary depending on both the window system version and the locale. This function lets you override the default font; but overriding may be a bad idea because, for example, some locales need extra large fonts to support their special characters. \warning Do not use this function in conjunction with \l{Qt Style Sheets}. The font of an application can be customized using the "font" style sheet property. To set a bold font for all QPushButtons, set the application styleSheet() as "QPushButton { font: bold }" \sa font(), fontMetrics(), QWidget::setFont() */ void QApplication::setFont(const QFont &font, const char *className) { bool all = false; FontHash *hash = app_fonts(); if (!className) { if (!QApplicationPrivate::app_font) QApplicationPrivate::app_font = new QFont(font); else *QApplicationPrivate::app_font = font; if (hash && hash->size()) { all = true; hash->clear(); } } else if (hash) { hash->insert(className, font); } if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { QEvent e(QEvent::ApplicationFontChange); QWidgetList wids = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = wids.constBegin(); it != wids.constEnd(); ++it) { register QWidget *w = *it; if (all || (!className && w->isWindow()) || w->inherits(className)) // matching class sendEvent(w, &e); } } if (!className && (!QApplicationPrivate::sys_font || !font.isCopyOf(*QApplicationPrivate::sys_font))) { if (!QApplicationPrivate::set_font) QApplicationPrivate::set_font = new QFont(font); else *QApplicationPrivate::set_font = font; } } /*! \internal */ void QApplicationPrivate::setSystemFont(const QFont &font) { if (!sys_font) sys_font = new QFont(font); else *sys_font = font; if (!QApplicationPrivate::set_font) QApplication::setFont(*sys_font); } /*! \property QApplication::windowIcon \brief the default window icon \sa QWidget::setWindowIcon(), {Setting the Application Icon} */ QIcon QApplication::windowIcon() { return QApplicationPrivate::app_icon ? *QApplicationPrivate::app_icon : QIcon(); } void QApplication::setWindowIcon(const QIcon &icon) { if (!QApplicationPrivate::app_icon) QApplicationPrivate::app_icon = new QIcon(); *QApplicationPrivate::app_icon = icon; if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { #ifdef Q_WS_MAC void qt_mac_set_app_icon(const QPixmap &); //qapplication_mac.cpp QSize size = QApplicationPrivate::app_icon->actualSize(QSize(128, 128)); qt_mac_set_app_icon(QApplicationPrivate::app_icon->pixmap(size)); #endif QEvent e(QEvent::ApplicationWindowIconChange); QWidgetList all = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { register QWidget *w = *it; if (w->isWindow()) sendEvent(w, &e); } } } /*! Returns a list of the top-level widgets (windows) in the application. Note that some of the top-level widgets may be hidden, for example a tooltip if no tooltip is currently shown. Example: \code void showAllHiddenTopLevelWidgets() { foreach (QWidget *widget, QApplication::topLevelWidgets()) { if (widget->isHidden()) widget->show(); } } \endcode \sa allWidgets(), QWidget::isWindow(), QWidget::isHidden() */ QWidgetList QApplication::topLevelWidgets() { QWidgetList list; QWidgetList all = allWidgets(); for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { QWidget *w = *it; if (w->isWindow() && w->windowType() != Qt::Desktop) list.append(w); } return list; } /*! Returns a list of all the widgets in the application. The list is empty (QList::isEmpty()) if there are no widgets. Note that some of the widgets may be hidden. Example: \code void updateAllWidgets() { foreach (QWidget *widget, QApplication::allWidgets()) widget->update(); } \endcode \sa topLevelWidgets(), QWidget::isVisible() */ QWidgetList QApplication::allWidgets() { QWidgetList list; if (QWidgetPrivate::mapper) list += QWidgetPrivate::mapper->values(); if (QWidgetPrivate::uncreatedWidgets) list += QWidgetPrivate::uncreatedWidgets->toList(); return list; } /*! Returns the application widget that has the keyboard input focus, or 0 if no widget in this application has the focus. \sa QWidget::setFocus(), QWidget::hasFocus(), activeWindow(), focusChanged() */ QWidget *QApplication::focusWidget() { return QApplicationPrivate::focus_widget; } void QApplicationPrivate::setFocusWidget(QWidget *focus, Qt::FocusReason reason) { hidden_focus_widget = 0; if (focus != focus_widget) { if (focus && focus->isHidden()) { hidden_focus_widget = focus; return; } if (focus && (reason == Qt::BacktabFocusReason || reason == Qt::TabFocusReason) && qt_in_tab_key_event) focus->window()->setAttribute(Qt::WA_KeyboardFocusChange); else if (focus && reason == Qt::ShortcutFocusReason) { focus->window()->setAttribute(Qt::WA_KeyboardFocusChange); } QWidget *prev = focus_widget; if (prev && reason != Qt::PopupFocusReason && reason != Qt::MenuBarFocusReason) { QInputContext *qic = prev->inputContext(); if(qic) { qic->reset(); qic->setFocusWidget(0); } } focus_widget = focus; if(focus_widget) focus_widget->d_func()->setFocus_sys(); if (reason != Qt::NoFocusReason) { //send events if (prev) { #ifdef QT_KEYPAD_NAVIGATION if (QApplication::keypadNavigationEnabled()) { if (prev->hasEditFocus()) prev->setEditFocus(false); } #endif QFocusEvent out(QEvent::FocusOut, reason); QPointer that = prev; QApplication::sendEvent(prev, &out); if (that) QApplication::sendEvent(that->style(), &out); } if(focus && QApplicationPrivate::focus_widget == focus) { QInputContext *qic = focus->inputContext(); if (qic && focus_widget->testAttribute(Qt::WA_WState_Created)) qic->setFocusWidget( focus_widget ); QFocusEvent in(QEvent::FocusIn, reason); QPointer that = focus; QApplication::sendEvent(focus, &in); if (that) QApplication::sendEvent(that->style(), &in); } } emit qApp->focusChanged(prev, focus_widget); } } /*! Returns the application top-level window that has the keyboard input focus, or 0 if no application window has the focus. Note that there might be an activeWindow() even if there is no focusWidget(), for example if no widget in that window accepts key events. \sa QWidget::setFocus(), QWidget::hasFocus(), focusWidget() */ QWidget *QApplication::activeWindow() { return QApplicationPrivate::active_window; } /*! Returns display (screen) font metrics for the application font. \sa font(), setFont(), QWidget::fontMetrics(), QPainter::fontMetrics() */ QFontMetrics QApplication::fontMetrics() { return desktop()->fontMetrics(); } /*! Closes all top-level windows. This function is particularly useful for applications with many top-level windows. It could, for example, be connected to a \gui{Exit} entry in the \gui{File} menu: \quotefromfile mainwindows/mdi/mainwindow.cpp \skipto exitAct = new QAct \printuntil SLOT(closeAllWindows()) The windows are closed in random order, until one window does not accept the close event. The application quits when the last window was successfully closed; this can be turned off by setting \l quitOnLastWindowClosed to false. \sa quitOnLastWindowClosed, lastWindowClosed() QWidget::close(), QWidget::closeEvent(), lastWindowClosed(), quit(), topLevelWidgets(), QWidget::isWindow() */ void QApplication::closeAllWindows() { bool did_close = true; QWidget *w; while((w = activeModalWidget()) && did_close) { if(!w->isVisible()) break; did_close = w->close(); } QWidgetList list = QApplication::topLevelWidgets(); for (int i = 0; did_close && i < list.size(); ++i) { w = list.at(i); if (w->isVisible() && w->windowType() != Qt::Desktop) { did_close = w->close(); list = QApplication::topLevelWidgets(); i = -1; } } } /*! Displays a simple message box about Qt. The message includes the version number of Qt being used by the application. This is useful for inclusion in the \gui Help menu of an application, as shown in the \l{mainwindows/menus}{Menus} example. This function is a convenience slot for QMessageBox::aboutQt(). */ void QApplication::aboutQt() { #ifndef QT_NO_MESSAGEBOX QMessageBox::aboutQt(activeWindow()); #endif // QT_NO_MESSAGEBOX } /*! \fn void QApplication::lastWindowClosed() This signal is emitted from QApplication::exec() when the last visible primary window (i.e. window with no parent) with the Qt::WA_QuitOnClose attribute set is closed. By default, \list \i this attribute is set for all widgets except transient windows such as splash screens, tool windows, and popup menus \i QApplication implicitly quits when this signal is emitted. \endlist This feature be turned off by setting \l quitOnLastWindowClosed to false. \sa QWidget::close() */ /*! \since 4.1 \fn void QApplication::focusChanged(QWidget *old, QWidget *now) This signal is emitted when the widget that has keyboard focus changed from \a old to \a now, i.e. because the user pressed the tab-key, clicked into a widget or changed the active window. Note that both \a old and \a now can be the null-pointer. The signal is emitted after both widget have been notified about the change through QFocusEvent. \sa QWidget::setFocus() QWidget::clearFocus() Qt::FocusReason */ #ifndef QT_NO_TRANSLATION static bool qt_detectRTLLanguage() { return force_reverse ^ QApplication::tr("QT_LAYOUT_DIRECTION", "Translate this string to the string 'LTR' in left-to-right" " languages or to 'RTL' in right-to-left languages (such as Hebrew" " and Arabic) to get proper widget layout.") == QLatin1String("RTL"); } #endif /*!\reimp */ bool QApplication::event(QEvent *e) { Q_D(QApplication); if(e->type() == QEvent::Close) { QCloseEvent *ce = static_cast(e); ce->accept(); closeAllWindows(); QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && !(w->windowType() == Qt::Desktop) && !(w->windowType() == Qt::Popup) && (!(w->windowType() == Qt::Dialog) || !w->parentWidget())) { ce->ignore(); break; } } if(ce->isAccepted()) return true; } else if(e->type() == QEvent::LanguageChange) { #ifndef QT_NO_TRANSLATION setLayoutDirection(qt_detectRTLLanguage()?Qt::RightToLeft:Qt::LeftToRight); #endif QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (!(w->windowType() == Qt::Desktop)) postEvent(w, new QEvent(QEvent::LanguageChange)); } } else if (e->type() == QEvent::Timer) { QTimerEvent *te = static_cast(e); Q_ASSERT(te != 0); if (te->timerId() == d->toolTipWakeUp.timerId()) { d->toolTipWakeUp.stop(); d->toolTipFallAsleep.start(2000, this); if (d->toolTipWidget && (d->toolTipWidget->window()->testAttribute(Qt::WA_AlwaysShowToolTips) || d->toolTipWidget->isActiveWindow())) { QHelpEvent e(QEvent::ToolTip, d->toolTipPos, d->toolTipGlobalPos); QApplication::sendEvent(d->toolTipWidget, &e); } } else if (te->timerId() == d->toolTipFallAsleep.timerId()) { d->toolTipFallAsleep.stop(); } } return QCoreApplication::event(e); } #if !defined(Q_WS_X11) // The doc and X implementation of this function is in qapplication_x11.cpp void QApplication::syncX() {} // do nothing #endif /*! \fn Qt::WindowsVersion QApplication::winVersion() Use \l QSysInfo::WindowsVersion instead. */ /*! \fn void QApplication::setActiveWindow(QWidget* active) Sets the active window to the \a active widget in response to a system event. The function is called from the platform specific event handlers. \warning This function does \e not set the keyboard focus to the active widget. Call QWidget::activateWindow() instead. It sets the activeWindow() and focusWidget() attributes and sends proper \l{QEvent::WindowActivate}{WindowActivate}/\l{QEvent::WindowDeactivate}{WindowDeactivate} and \l{QEvent::FocusIn}{FocusIn}/\l{QEvent::FocusOut}{FocusOut} events to all appropriate widgets. The window will then be painted in active state (e.g. cursors in line edits will blink), and it will have tool tips enabled. \sa activeWindow(), QWidget::activateWindow() */ void QApplication::setActiveWindow(QWidget* act) { QWidget* window = act?act->window():0; if (QApplicationPrivate::active_window == window) return; QWidgetList toBeActivated; QWidgetList toBeDeactivated; if (QApplicationPrivate::active_window) { if (style()->styleHint(QStyle::SH_Widget_ShareActivation, 0, QApplicationPrivate::active_window)) { QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && w->isActiveWindow()) toBeDeactivated.append(w); } } else { toBeDeactivated.append(QApplicationPrivate::active_window); } } #if !defined(Q_WS_MAC) QWidget *previousActiveWindow = QApplicationPrivate::active_window; #endif QApplicationPrivate::active_window = window; if (QApplicationPrivate::active_window) { if (style()->styleHint(QStyle::SH_Widget_ShareActivation, 0, QApplicationPrivate::active_window)) { QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && w->isActiveWindow()) toBeActivated.append(w); } } else { toBeActivated.append(QApplicationPrivate::active_window); } } // first the activation/deactivation events QEvent activationChange(QEvent::ActivationChange); QEvent windowActivate(QEvent::WindowActivate); QEvent windowDeactivate(QEvent::WindowDeactivate); #if !defined(Q_WS_MAC) if (!previousActiveWindow) { QEvent appActivate(QEvent::ApplicationActivate); sendSpontaneousEvent(qApp, &appActivate); } #endif for (int i = 0; i < toBeActivated.size(); ++i) { QWidget *w = toBeActivated.at(i); sendSpontaneousEvent(w, &windowActivate); sendSpontaneousEvent(w, &activationChange); } for(int i = 0; i < toBeDeactivated.size(); ++i) { QWidget *w = toBeDeactivated.at(i); sendSpontaneousEvent(w, &windowDeactivate); sendSpontaneousEvent(w, &activationChange); } #if !defined(Q_WS_MAC) if (!QApplicationPrivate::active_window) { QEvent appDeactivate(QEvent::ApplicationDeactivate); sendSpontaneousEvent(qApp, &appDeactivate); } #endif if (QApplicationPrivate::popupWidgets == 0) { // !inPopupMode() // then focus events if (!QApplicationPrivate::active_window && QApplicationPrivate::focus_widget) { QApplicationPrivate::setFocusWidget(0, Qt::ActiveWindowFocusReason); } else if (QApplicationPrivate::active_window) { QWidget *w = QApplicationPrivate::active_window->focusWidget(); if (w && w->isVisible() /*&& w->focusPolicy() != QWidget::NoFocus*/) w->setFocus(Qt::ActiveWindowFocusReason); else { w = QApplicationPrivate::focusNextPrevChild_helper(QApplicationPrivate::active_window, true); if (w) { w->setFocus(Qt::ActiveWindowFocusReason); } else { // If the focus widget is not in the activate_window, clear the focus w = QApplicationPrivate::focus_widget; if (w && !QApplicationPrivate::active_window->isAncestorOf(w)) QApplicationPrivate::setFocusWidget(0, Qt::ActiveWindowFocusReason); } } } } } /*!internal * Helper function that returns the new focus widget, but does not set the focus reason. * Returns 0 if a new focus widget could not be found. */ QWidget *QApplicationPrivate::focusNextPrevChild_helper(QWidget *toplevel, bool next) { uint focus_flag = qt_tab_all_widgets ? Qt::TabFocus : Qt::StrongFocus; QWidget *f = toplevel->focusWidget(); if (!f) f = toplevel; QWidget *w = f; QWidget *test = f->d_func()->focus_next; while (test && test != f) { if ((test->focusPolicy() & focus_flag) == focus_flag && !(test->d_func()->extra && test->d_func()->extra->focus_proxy) && test->isVisibleTo(toplevel) && test->isEnabled() && !(w->windowType() == Qt::SubWindow && !w->isAncestorOf(test)) && (toplevel->windowType() != Qt::SubWindow || toplevel->isAncestorOf(test))) { w = test; if (next) break; } test = test->d_func()->focus_next; } if (w == f) { if (qt_in_tab_key_event) { w->window()->setAttribute(Qt::WA_KeyboardFocusChange); w->update(); } return 0; } return w; } /*!\internal Creates the proper Enter/Leave event when widget \a enter is entered and widget \a leave is left. */ void QApplicationPrivate::dispatchEnterLeave(QWidget* enter, QWidget* leave) { #if 0 if (leave) { QEvent e(QEvent::Leave); QApplication::sendEvent(leave, & e); } if (enter) { QEvent e(QEvent::Enter); QApplication::sendEvent(enter, & e); } return; #endif QWidget* w ; if (!enter && !leave) return; QWidgetList leaveList; QWidgetList enterList; bool sameWindow = leave && enter && leave->window() == enter->window(); if (leave && !sameWindow) { w = leave; do { leaveList.append(w); } while (!w->isWindow() && (w = w->parentWidget())); } if (enter && !sameWindow) { w = enter; do { enterList.prepend(w); } while (!w->isWindow() && (w = w->parentWidget())); } if (sameWindow) { int enterDepth = 0; int leaveDepth = 0; w = enter; while (!w->isWindow() && (w = w->parentWidget())) enterDepth++; w = leave; while (!w->isWindow() && (w = w->parentWidget())) leaveDepth++; QWidget* wenter = enter; QWidget* wleave = leave; while (enterDepth > leaveDepth) { wenter = wenter->parentWidget(); enterDepth--; } while (leaveDepth > enterDepth) { wleave = wleave->parentWidget(); leaveDepth--; } while (!wenter->isWindow() && wenter != wleave) { wenter = wenter->parentWidget(); wleave = wleave->parentWidget(); } w = leave; while (w != wleave) { leaveList.append(w); w = w->parentWidget(); } w = enter; while (w != wenter) { enterList.prepend(w); w = w->parentWidget(); } } QEvent leaveEvent(QEvent::Leave); for (int i = 0; i < leaveList.size(); ++i) { w = leaveList.at(i); if (!qApp->activeModalWidget() || QApplicationPrivate::tryModalHelper(w, 0)) { QApplication::sendEvent(w, &leaveEvent); if (w->testAttribute(Qt::WA_Hover) && (!qApp->activePopupWidget() || qApp->activePopupWidget() == w->window())) { Q_ASSERT(instance()); QHoverEvent he(QEvent::HoverLeave, QPoint(-1, -1), w->mapFromGlobal(QApplicationPrivate::instance()->hoverGlobalPos)); qApp->d_func()->notify_helper(w, &he); } } } QPoint posEnter = QCursor::pos(); QEvent enterEvent(QEvent::Enter); for (int i = 0; i < enterList.size(); ++i) { w = enterList.at(i); if (!qApp->activeModalWidget() || QApplicationPrivate::tryModalHelper(w, 0)) { QApplication::sendEvent(w, &enterEvent); if (w->testAttribute(Qt::WA_Hover) && (!qApp->activePopupWidget() || qApp->activePopupWidget() == w->window())) { QHoverEvent he(QEvent::HoverEnter, w->mapFromGlobal(posEnter), QPoint(-1, -1)); qApp->d_func()->notify_helper(w, &he); } } } } /* exported for the benefit of testing tools */ Q_GUI_EXPORT bool qt_tryModalHelper(QWidget *widget, QWidget **rettop) { return QApplicationPrivate::tryModalHelper(widget, rettop); } /*! \internal Returns true if \a widget is blocked by a modal window. */ bool QApplicationPrivate::isBlockedByModal(QWidget *widget) { widget = widget->window(); if (!modalState()) return false; if (qApp->activePopupWidget() == widget) return false; for (int i = 0; i < qt_modal_stack->size(); ++i) { QWidget *modalWidget = qt_modal_stack->at(i); { // check if the active modal widget is our widget or a parent of our widget QWidget *w = widget; while (w) { if (w == modalWidget) return false; w = w->parentWidget(); } #ifdef Q_WS_WIN if ((widget->testAttribute(Qt::WA_WState_Created) || widget->data->winid) && (modalWidget->testAttribute(Qt::WA_WState_Created) || modalWidget->data->winid) && IsChild(modalWidget->data->winid, widget->data->winid)) return false; #endif } Qt::WindowModality windowModality = modalWidget->windowModality(); if (windowModality == Qt::NonModal) { // determine the modality type if it hasn't been set on the // modalWidget, this normally happens when waiting for a // native dialog. use WindowModal if we are the child of a // group leader; otherwise use ApplicationModal. QWidget *m = modalWidget; while (m && !m->testAttribute(Qt::WA_GroupLeader)) { m = m->parentWidget(); if (m) m = m->window(); } windowModality = (m && m->testAttribute(Qt::WA_GroupLeader)) ? Qt::WindowModal : Qt::ApplicationModal; } switch (windowModality) { case Qt::ApplicationModal: { QWidget *groupLeaderForWidget = widget; while (groupLeaderForWidget && !groupLeaderForWidget->testAttribute(Qt::WA_GroupLeader)) groupLeaderForWidget = groupLeaderForWidget->parentWidget(); if (groupLeaderForWidget) { // if \a widget has WA_GroupLeader, it can only be blocked by ApplicationModal children QWidget *m = modalWidget; while (m && m != groupLeaderForWidget && !m->testAttribute(Qt::WA_GroupLeader)) m = m->parentWidget(); if (m == groupLeaderForWidget) return true; } else if (modalWidget != widget) { return true; } break; } case Qt::WindowModal: { QWidget *w = widget; do { QWidget *m = modalWidget; do { if (m == w) return true; m = m->parentWidget(); if (m) m = m->window(); } while (m); w = w->parentWidget(); if (w) w = w->window(); } while (w); break; } default: Q_ASSERT_X(false, "QApplication", "internal error, a modal widget cannot be modeless"); break; } } return false; } /*!\internal */ void QApplicationPrivate::enterModal(QWidget *widget) { QSet blocked; QList windows = qApp->topLevelWidgets(); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (window->windowType() != Qt::Tool && isBlockedByModal(window)) blocked.insert(window); } enterModal_sys(widget); windows = qApp->topLevelWidgets(); QEvent e(QEvent::WindowBlocked); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (!blocked.contains(window) && window->windowType() != Qt::Tool && isBlockedByModal(window)) QApplication::sendEvent(window, &e); } } /*!\internal */ void QApplicationPrivate::leaveModal(QWidget *widget) { QSet blocked; QList windows = qApp->topLevelWidgets(); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (window->windowType() != Qt::Tool && isBlockedByModal(window)) blocked.insert(window); } leaveModal_sys(widget); windows = qApp->topLevelWidgets(); QEvent e(QEvent::WindowUnblocked); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if(blocked.contains(window) && window->windowType() != Qt::Tool && !isBlockedByModal(window)) QApplication::sendEvent(window, &e); } } /*!\internal Called from qapplication_\e{platform}.cpp, returns true if the widget should accept the event. */ bool QApplicationPrivate::tryModalHelper(QWidget *widget, QWidget **rettop) { QWidget *top = QApplication::activeModalWidget(); if (rettop) *rettop = top; // the active popup widget always gets the input event if (qApp->activePopupWidget()) return true; #ifdef Q_WS_MAC top = QApplicationPrivate::tryModalHelper_sys(top); if (rettop) *rettop = top; #endif return !isBlockedByModal(widget->window()); } /*! Returns the desktop widget (also called the root window). Note that the desktop may be composed of multiple screens, so it would be incorrect, for example, to attempt to \e center some widget in the desktop's geometry. QDesktopWidget has various functions for obtaining useful geometries upon the desktop, such as QDesktopWidget::screenGeometry() and QDesktopWidget::availableGeometry(). On X11, it is also possible to draw on the desktop. */ QDesktopWidget *QApplication::desktop() { if (!qt_desktopWidget || // not created yet !(qt_desktopWidget->windowType() == Qt::Desktop)) { // reparented away qt_desktopWidget = new QDesktopWidget(); } return qt_desktopWidget; } #ifndef QT_NO_CLIPBOARD /*! Returns a pointer to the application global clipboard. */ QClipboard *QApplication::clipboard() { if (qt_clipboard == 0) { qt_clipboard = new QClipboard(0); } return qt_clipboard; } #endif // QT_NO_CLIPBOARD /*! Sets whether Qt should use the system's standard colors, fonts, etc., to \a on. By default, this is true. This function must be called before creating the QApplication object, like this: \code int main(int argc, char *argv[]) { QApplication::setDesktopSettingsAware(false); QApplication app(argc, argv); ... return app.exec(); } \endcode \sa desktopSettingsAware() */ void QApplication::setDesktopSettingsAware(bool on) { QApplicationPrivate::obey_desktop_settings = on; } /*! Returns true if Qt is set to use the system's standard colors, fonts, etc.; otherwise returns false. The default is true. \sa setDesktopSettingsAware() */ bool QApplication::desktopSettingsAware() { return QApplicationPrivate::obey_desktop_settings; } /*! Returns the current state of the modifier keys on the keyboard. The current state is updated sychronously as the event queue is emptied of events that will spontaneously change the keyboard state (QEvent::KeyPress and QEvent::KeyRelease events). It should be noted this may not reflect the actual keys held on the input device at the time of calling but rather the modifiers as last reported in one of the above events. If no keys are being held Qt::NoModifier is returned. \sa mouseButtons() */ Qt::KeyboardModifiers QApplication::keyboardModifiers() { return QApplicationPrivate::modifier_buttons; } /*! Returns the current state of the buttons on the mouse. The current state is updated syncronously as the event queue is emptied of events that will spontaneously change the mouse state (QEvent::MousePress and QEvent::MouseRelease events). It should be noted this may not reflect the actual buttons held on theinput device at the time of calling but rather the mouse buttons as last reported in one of the above events. If no mouse buttons are being held Qt::NoButton is returned. \sa keyboardModifiers() */ Qt::MouseButtons QApplication::mouseButtons() { return QApplicationPrivate::mouse_buttons; } /*! \fn bool QApplication::isSessionRestored() const Returns true if the application has been restored from an earlier \link session.html session\endlink; otherwise returns false. \sa sessionId(), commitData(), saveState() */ /*! \fn QString QApplication::sessionId() const Returns the current \link session.html session's\endlink identifier. If the application has been restored from an earlier session, this identifier is the same as it was in that previous session. The session identifier is guaranteed to be unique both for different applications and for different instances of the same application. \sa isSessionRestored(), sessionKey(), commitData(), saveState() */ /*! \fn QString QApplication::sessionKey() const Returns the session key in the current \link session.html session\endlink. If the application has been restored from an earlier session, this key is the same as it was when the previous session ended. The session key changes with every call of commitData() or saveState(). \sa isSessionRestored(), sessionId(), commitData(), saveState() */ #ifndef QT_NO_SESSIONMANAGER bool QApplication::isSessionRestored() const { Q_D(const QApplication); return d->is_session_restored; } QString QApplication::sessionId() const { Q_D(const QApplication); return d->session_id; } QString QApplication::sessionKey() const { Q_D(const QApplication); return d->session_key; } #endif /*! \since 4.2 \fn void QApplication::commitDataRequest(QSessionManager &manager) This signal deals with \link session.html session management\endlink. It is emitted when the QSessionManager wants the application to commit all its data. Usually this means saving all open files, after getting permission from the user. Furthermore you may want to provide a means by which the user can cancel the shutdown. Note that you should not exit the application when called. Instead, the session manager may or may not do this afterwards, depending on the context. \warning Within this signal, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details and example usage. Note: You should use Qt::DirectConnection when connecting to this signal. \sa isSessionRestored(), sessionId(), saveState(), {Session Management} */ /*! This function deals with \link session.html session management\endlink. It is invoked when the QSessionManager wants the application to commit all its data. Usually this means saving all open files, after getting permission from the user. Furthermore you may want to provide a means by which the user can cancel the shutdown. Note that you should not exit the application within this function. Instead, the session manager may or may not do this afterwards, depending on the context. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details and example usage. The default implementation requests interaction and sends a close event to all visible top-level widgets. If any event was rejected, the shutdown is canceled. \sa isSessionRestored(), sessionId(), saveState(), {Session Management} */ #ifndef QT_NO_SESSIONMANAGER void QApplication::commitData(QSessionManager& manager ) { emit commitDataRequest(manager); if (manager.allowsInteraction()) { QWidgetList done; QWidgetList list = QApplication::topLevelWidgets(); bool cancelled = false; for (int i = 0; !cancelled && i < list.size(); ++i) { QWidget* w = list.at(i); if (w->isVisible() && !done.contains(w)) { cancelled = !w->close(); if (!cancelled) done.append(w); list = QApplication::topLevelWidgets(); i = -1; } } if (cancelled) manager.cancel(); } } /*! \since 4.2 \fn void QApplication::saveStateRequest(QSessionManager &manager) This signal deals with \link session.html session management\endlink. It is invoked when the \link QSessionManager session manager \endlink wants the application to preserve its state for a future session. For example, a text editor would create a temporary file that includes the current contents of its edit buffers, the location of the cursor and other aspects of the current editing session. Note that you should never exit the application within this signal. Instead, the session manager may or may not do this afterwards, depending on the context. Futhermore, most session managers will very likely request a saved state immediately after the application has been started. This permits the session manager to learn about the application's restart policy. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details. Note:: You should use Qt::DirectConnection when connecting to this signal. \sa isSessionRestored(), sessionId(), commitData(), {Session Management} */ /*! This function deals with \link session.html session management\endlink. It is invoked when the \link QSessionManager session manager \endlink wants the application to preserve its state for a future session. For example, a text editor would create a temporary file that includes the current contents of its edit buffers, the location of the cursor and other aspects of the current editing session. Note that you should never exit the application within this function. Instead, the session manager may or may not do this afterwards, depending on the context. Futhermore, most session managers will very likely request a saved state immediately after the application has been started. This permits the session manager to learn about the application's restart policy. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details. \sa isSessionRestored(), sessionId(), commitData(), {Session Management} */ void QApplication::saveState(QSessionManager &manager) { emit saveStateRequest(manager); } #endif //QT_NO_SESSIONMANAGER /* Sets the time after which a drag should start to \a ms ms. \sa startDragTime() */ void QApplication::setStartDragTime(int ms) { drag_time = ms; } /*! \property QApplication::startDragTime \brief the time in milliseconds that a mouse button must be held down before a drag and drop operation will begin If you support drag and drop in your application, and want to start a drag and drop operation after the user has held down a mouse button for a certain amount of time, you should use this property's value as the delay. Qt also uses this delay internally, e.g. in QTextEdit and QLineEdit, for starting a drag. The default value is 500 ms. \sa startDragDistance(), {Drag and Drop} */ int QApplication::startDragTime() { return drag_time; } /* Sets the distance after which a drag should start to \a l pixels. \sa startDragDistance() */ void QApplication::setStartDragDistance(int l) { drag_distance = l; } /*! \property QApplication::startDragDistance If you support drag and drop in your application, and want to start a drag and drop operation after the user has moved the cursor a certain distance with a button held down, you should use this property's value as the minimum distance required. For example, if the mouse position of the click is stored in \c startPos and the current position (e.g. in the mouse move event) is \c currentPos, you can find out if a drag should be started with code like this: \code if ((startPos - currentPos).manhattanLength() >= QApplication::startDragDistance()) startTheDrag(); \endcode Qt uses this value internally, e.g. in QFileDialog. The default value is 4 pixels. \sa startDragTime() QPoint::manhattanLength() {Drag and Drop} */ int QApplication::startDragDistance() { return drag_distance; } /*! \fn void QApplication::setReverseLayout(bool reverse) Use setLayoutDirection() instead. */ /*! \fn void QApplication::reverseLayout() Use layoutDirection() instead. */ /*! \fn bool QApplication::isRightToLeft() Returns true if the application's layout direction is Qt::RightToLeft; otherwise returns false. \sa layoutDirection(), isLeftToRight() */ /*! \fn bool QApplication::isLeftToRight() Returns true if the application's layout direction is Qt::LeftToRight; otherwise returns false. \sa layoutDirection(), isRightToLeft() */ /*! \property QApplication::layoutDirection \brief the default layout direction for this application On system start-up, the default layout direction depends on the application's language. \sa QWidget::layoutDirection, isLeftToRight(), isRightToLeft() */ void QApplication::setLayoutDirection(Qt::LayoutDirection direction) { if (layout_direction == direction) return; layout_direction = direction; QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); QEvent ev(QEvent::ApplicationLayoutDirectionChange); sendEvent(w, &ev); } } Qt::LayoutDirection QApplication::layoutDirection() { return layout_direction; } /*! \obsolete Strips out vertical alignment flags and transforms an alignment \a align of Qt::AlignLeft into Qt::AlignLeft or Qt::AlignRight according to the language used. */ #ifdef QT3_SUPPORT Qt::Alignment QApplication::horizontalAlignment(Qt::Alignment align) { return QStyle::visualAlignment(layoutDirection(), align); } #endif /*! \fn QCursor *QApplication::overrideCursor() Returns the active application override cursor. This function returns 0 if no application cursor has been defined (i.e. the internal cursor stack is empty). \sa setOverrideCursor(), restoreOverrideCursor() */ #ifndef QT_NO_CURSOR QCursor *QApplication::overrideCursor() { return qApp->d_func()->cursor_list.isEmpty() ? 0 : &qApp->d_func()->cursor_list.first(); } /*! Changes the currently active application override cursor to \a cursor. This function has no effect if setOverrideCursor() wasn't called. \sa setOverrideCursor() overrideCursor() restoreOverrideCursor() QWidget::setCursor() */ void QApplication::changeOverrideCursor(const QCursor &cursor) { if (qApp->d_func()->cursor_list.isEmpty()) return; qApp->d_func()->cursor_list.removeFirst(); setOverrideCursor(cursor); } #endif /*! \fn void QApplication::setOverrideCursor(const QCursor &cursor, bool replace) Use changeOverrideCursor(\a cursor) (if \a replace is true) or setOverrideCursor(\a cursor) (if \a replace is false). */ /*! Enters the main event loop and waits until exit() is called or the main widget is destroyed, and returns the value that was set to exit() (which is 0 if exit() is called via quit()). It is necessary to call this function to start event handling. The main event loop receives events from the window system and dispatches these to the application widgets. Generally speaking, no user interaction can take place before calling exec(). As a special case, modal widgets like QMessageBox can be used before calling exec(), because modal widgets call exec() to start a local event loop. To make your application perform idle processing, i.e. executing a special function whenever there are no pending events, use a QTimer with 0 timeout. More advanced idle processing schemes can be achieved using processEvents(). \sa quitOnLastWindowClosed, quit(), exit(), processEvents(), QCoreApplication::exec() */ int QApplication::exec() { #ifndef QT_NO_ACCESSIBILITY QAccessible::setRootObject(qApp); #endif return QCoreApplication::exec(); } /*! \reimp */ bool QApplication::notify(QObject *receiver, QEvent *e) { Q_D(QApplication); // no events are delivered after ~QCoreApplication() has started if (QApplicationPrivate::is_app_closing) return true; if (receiver == 0) { // serious error qWarning("QApplication::notify: Unexpected null receiver"); return true; } #ifndef QT_NO_DEBUG d->checkReceiverThread(receiver); #endif #ifdef QT3_SUPPORT if (e->type() == QEvent::ChildRemoved && !receiver->d_func()->pendingChildInsertedEvents.isEmpty()) receiver->d_func()->removePendingChildInsertedEvents(static_cast(e)->child()); #endif // QT3_SUPPORT // capture the current mouse/keyboard state if(e->spontaneous()) { if(e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease) { QKeyEvent *ke = static_cast(e); QApplicationPrivate::modifier_buttons = ke->modifiers(); } else if(e->type() == QEvent::MouseButtonPress || e->type() == QEvent::MouseButtonRelease) { QMouseEvent *me = static_cast(e); QApplicationPrivate::modifier_buttons = me->modifiers(); if(me->type() == QEvent::MouseButtonPress) QApplicationPrivate::mouse_buttons |= me->button(); else QApplicationPrivate::mouse_buttons &= ~me->button(); } } // User input and window activation makes tooltips sleep switch (e->type()) { case QEvent::Wheel: case QEvent::ActivationChange: case QEvent::KeyPress: case QEvent::KeyRelease: case QEvent::FocusOut: case QEvent::FocusIn: case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: d->toolTipFallAsleep.stop(); case QEvent::Leave: d->toolTipWakeUp.stop(); default: break; } bool res = false; if (!receiver->isWidgetType()) { res = d->notify_helper(receiver, e); } else switch (e->type()) { #if defined QT3_SUPPORT && !defined(QT_NO_SHORTCUT) case QEvent::Accel: { if (d->use_compat()) { QKeyEvent* key = static_cast(e); res = d->notify_helper(receiver, e); if (!res && !key->isAccepted()) res = d->qt_dispatchAccelEvent(static_cast(receiver), key); // next lines are for compatibility with Qt <= 3.0.x: old // QAccel was listening on toplevel widgets if (!res && !key->isAccepted() && !static_cast(receiver)->isWindow()) res = d->notify_helper(static_cast(receiver)->window(), e); } break; } #endif //QT3_SUPPORT && !QT_NO_SHORTCUT case QEvent::ShortcutOverride: case QEvent::KeyPress: case QEvent::KeyRelease: { if (!receiver->isWidgetType()) { res = d->notify_helper(receiver, e); break; } QWidget* w = static_cast(receiver); QKeyEvent* key = static_cast(e); #if defined QT3_SUPPORT && !defined(QT_NO_SHORTCUT) if (d->use_compat() && d->qt_tryComposeUnicode(w, key)) break; #endif if (key->type()==QEvent::KeyPress) { #ifndef QT_NO_SHORTCUT // Try looking for a Shortcut before sending key events if (res = qApp->d_func()->shortcutMap.tryShortcutEvent(w, key)) return res; #endif qt_in_tab_key_event = (key->key() == Qt::Key_Backtab || key->key() == Qt::Key_Tab || key->key() == Qt::Key_Left || key->key() == Qt::Key_Up || key->key() == Qt::Key_Right || key->key() == Qt::Key_Down); } bool def = key->isAccepted(); QPointer pw = w; while (w) { if (def) key->accept(); else key->ignore(); res = d->notify_helper(w, e); if ((res && key->isAccepted()) /* QLineEdit will emit a signal on Key_Return, but ignore the event, and sometimes the connected slot deletes the QLineEdit (common in itemview delegates), so we have to check if the widget was destroyed even if the event was ignored (to prevent a crash) note that we don't have to reset pw while propagating (because the original receiver will be destroyed if one of it's ancestors is) */ || !pw || w->isWindow() || !w->parentWidget()) { break; } w = w->parentWidget(); } qt_in_tab_key_event = false; } break; case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: case QEvent::MouseMove: { QWidget* w = static_cast(receiver); QMouseEvent* mouse = static_cast(e); QPoint relpos = mouse->pos(); if (e->spontaneous()) { if (e->type() == QEvent::MouseButtonPress) { QWidget *fw = w; while (fw) { if (fw->isEnabled() && (fw->focusPolicy() & Qt::ClickFocus)) { fw->setFocus(Qt::MouseFocusReason); break; } if (fw->isWindow()) break; fw = fw->parentWidget(); } } if (e->type() == QEvent::MouseMove && mouse->buttons() == 0) { d->toolTipWidget = w; d->toolTipPos = relpos; d->toolTipGlobalPos = mouse->globalPos(); d->toolTipWakeUp.start(d->toolTipFallAsleep.isActive()?20:700, this); } } bool eventAccepted = mouse->isAccepted(); QPointer pw = w; while (w) { QMouseEvent me(mouse->type(), relpos, mouse->globalPos(), mouse->button(), mouse->buttons(), mouse->modifiers()); me.spont = mouse->spontaneous(); // throw away any mouse-tracking-only mouse events if (!w->hasMouseTracking() && mouse->type() == QEvent::MouseMove && mouse->buttons() == 0) { // but still send them through all application event filters (normally done by notify_helper) QReadWriteLock *lock = QObjectPrivate::readWriteLock(); if (lock) lock->lockForRead(); for (int i = 0; i < d->eventFilters.size(); ++i) { register QObject *obj = d->eventFilters.at(i); if (lock) lock->unlock(); if (obj && obj->eventFilter(w, w == receiver ? mouse : &me)) { lock = 0; break; } if (lock) lock->lockForRead(); } if (lock) lock->unlock(); res = true; } else { w->setAttribute(Qt::WA_NoMouseReplay, false); res = d->notify_helper(w, w == receiver ? mouse : &me); e->spont = false; } eventAccepted = (w == receiver ? mouse : &me)->isAccepted(); if (res && eventAccepted) break; if (w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } mouse->setAccepted(eventAccepted); if (e->type() == QEvent::MouseMove) { if (!pw) break; w = static_cast(receiver); relpos = mouse->pos(); QPoint diff = relpos - w->mapFromGlobal(d->hoverGlobalPos); while (w) { if (w->testAttribute(Qt::WA_Hover) && (!qApp->activePopupWidget() || qApp->activePopupWidget() == w->window())) { QHoverEvent he(QEvent::HoverMove, relpos, relpos - diff); d->notify_helper(w, &he); } if (w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } } d->hoverGlobalPos = mouse->globalPos(); } break; #ifndef QT_NO_WHEELEVENT case QEvent::Wheel: { QWidget* w = static_cast(receiver); QWheelEvent* wheel = static_cast(e); QPoint relpos = wheel->pos(); bool eventAccepted = wheel->isAccepted(); if (e->spontaneous()) { QWidget *fw = w; while (fw) { if (fw->isEnabled() && (fw->focusPolicy() & Qt::WheelFocus) == Qt::WheelFocus) { fw->setFocus(Qt::MouseFocusReason); break; } if (fw->isWindow()) break; fw = fw->parentWidget(); } } while (w) { QWheelEvent we(relpos, wheel->globalPos(), wheel->delta(), wheel->buttons(), wheel->modifiers(), wheel->orientation()); we.spont = wheel->spontaneous(); res = d->notify_helper(w, w == receiver ? wheel : &we); eventAccepted = ((w == receiver) ? wheel : &we)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } wheel->setAccepted(eventAccepted); } break; #endif case QEvent::ContextMenu: { QWidget* w = static_cast(receiver); QContextMenuEvent *context = static_cast(e); QPoint relpos = context->pos(); bool eventAccepted = context->isAccepted(); while (w) { QContextMenuEvent ce(context->reason(), relpos, context->globalPos()); ce.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? context : &ce); eventAccepted = ((w == receiver) ? context : &ce)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } context->setAccepted(eventAccepted); } break; #ifndef QT_NO_TABLETEVENT case QEvent::TabletMove: case QEvent::TabletPress: case QEvent::TabletRelease: { QWidget *w = static_cast(receiver); QTabletEvent *tablet = static_cast(e); QPoint relpos = tablet->pos(); bool eventAccepted = tablet->isAccepted(); while (w) { QTabletEvent te(tablet->type(), relpos, tablet->globalPos(), tablet->hiResGlobalPos(), tablet->device(), tablet->pointerType(), tablet->pressure(), tablet->xTilt(), tablet->yTilt(), tablet->tangentialPressure(), tablet->rotation(), tablet->z(), tablet->modifiers(), tablet->uniqueId()); te.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? tablet : &te); eventAccepted = ((w == receiver) ? tablet : &te)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } tablet->setAccepted(eventAccepted); qt_tabletChokeMouse = tablet->isAccepted(); } break; #endif // QT_NO_TABLETEVENT #if !defined(QT_NO_TOOLTIP) || !defined(QT_NO_WHATSTHIS) case QEvent::ToolTip: case QEvent::WhatsThis: case QEvent::QueryWhatsThis: { QWidget* w = static_cast(receiver); QHelpEvent *help = static_cast(e); QPoint relpos = help->pos(); bool eventAccepted = help->isAccepted(); while (w) { QHelpEvent he(help->type(), relpos, help->globalPos()); he.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? help : &he); e->spont = false; eventAccepted = (w == receiver ? help : &he)->isAccepted(); if ((res && eventAccepted) || w->isWindow()) break; relpos += w->pos(); w = w->parentWidget(); } help->setAccepted(eventAccepted); } break; #endif #if !defined(QT_NO_STATUSTIP) || !defined(QT_NO_WHATSTHIS) case QEvent::StatusTip: case QEvent::WhatsThisClicked: { QWidget *w = static_cast(receiver); while (w) { res = d->notify_helper(w, e); if ((res && e->isAccepted()) || w->isWindow()) break; w = w->parentWidget(); } } break; #endif #ifndef QT_NO_DRAGANDDROP case QEvent::DragEnter: { QWidget* w = static_cast(receiver); QDragEnterEvent *dragEvent = static_cast(e); #ifdef Q_WS_MAC // HIView has a slight difference in how it delivers events to children and parents // It will not give a leave to a child's parent when it enters a child. QWidget *currentTarget = QDragManager::self()->currentTarget(); if (currentTarget) { // Assume currentTarget did not get a leave QDragLeaveEvent event; QApplication::sendEvent(currentTarget, &event); } #endif while (w) { if (w->isEnabled() && w->acceptDrops()) { res = d->notify_helper(w, dragEvent); if (res && dragEvent->isAccepted()) { QDragManager::self()->setCurrentTarget(w); break; } } if (w->isWindow()) break; dragEvent->p = w->mapToParent(dragEvent->p); w = w->parentWidget(); } } break; case QEvent::DragMove: case QEvent::Drop: case QEvent::DragLeave: { QWidget * w = QDragManager::self()->currentTarget(); if (!w) { #ifdef Q_WS_MAC // HIView has a slight difference in how it delivers events to children and parents // It will not give an enter to a child's parent when it leaves the child. if (e->type() == QEvent::DragLeave) break; // Assume that w did not get an enter. QDropEvent *dropEvent = static_cast(e); QDragEnterEvent dragEnterEvent(dropEvent->pos(), dropEvent->possibleActions(), dropEvent->mimeData(), dropEvent->mouseButtons(), dropEvent->keyboardModifiers()); QApplication::sendEvent(receiver, &dragEnterEvent); w = QDragManager::self()->currentTarget(); if (!w) #endif break; } if (e->type() == QEvent::DragMove || e->type() == QEvent::Drop) { QDropEvent *dragEvent = static_cast(e); QWidget *origReciver = static_cast(receiver); while (origReciver && w != origReciver) { dragEvent->p = origReciver->mapToParent(dragEvent->p); origReciver = origReciver->parentWidget(); } } res = d->notify_helper(w, e); if (e->type() != QEvent::DragMove) { QDragManager::self()->setCurrentTarget(0, e->type() == QEvent::Drop); } else { QDragMoveEvent *moveEvent = static_cast(e); moveEvent->rect.setTopLeft(static_cast(receiver)->mapFrom(w, moveEvent->rect.topLeft())); } } break; #endif default: res = d->notify_helper(receiver, e); break; } return res; } bool QApplicationPrivate::notify_helper(QObject *receiver, QEvent * e) { Q_Q(QApplication); QReadWriteLock *lock = QObjectPrivate::readWriteLock(); // send to all application event filters if (lock) lock->lockForRead(); for (int i = 0; i < eventFilters.size(); ++i) { register QObject *obj = eventFilters.at(i); if (lock) lock->unlock(); if (obj && obj->eventFilter(receiver,e)) return true; if (lock) lock->lockForRead(); } if (lock) lock->unlock(); if (receiver->isWidgetType()) { QWidget *widget = static_cast(receiver); // toggle HasMouse widget state on enter and leave if ((e->type() == QEvent::Enter || e->type() == QEvent::DragEnter) && (!qApp->activePopupWidget() || qApp->activePopupWidget() == widget->window())) widget->setAttribute(Qt::WA_UnderMouse, true); else if (e->type() == QEvent::Leave || e->type() == QEvent::DragLeave) widget->setAttribute(Qt::WA_UnderMouse, false); if (QLayout *layout=widget->d_func()->layout) { layout->widgetEvent(e); } } // send to all receiver event filters if (receiver != q) { if (lock) lock->lockForRead(); for (int i = 0; i < receiver->d_func()->eventFilters.size(); ++i) { register QObject *obj = receiver->d_func()->eventFilters.at(i); if (lock) lock->unlock(); if (obj && obj->eventFilter(receiver,e)) return true; if (lock) lock->lockForRead(); } if (lock) lock->unlock(); } bool consumed = receiver->event(e); e->spont = false; return consumed; } /*! \class QSessionManager \brief The QSessionManager class provides access to the session manager. \ingroup application \ingroup environment A session manager in a desktop environment (in which Qt GUI applications live) keeps track of a session, which is a group of running applications, each of which has a particular state. The state of an application contains (most notably) the documents the application has open and the position and size of its windows. The session manager is used to save the session, e.g. when the machine is shut down, and to restore a session, e.g. when the machine is started up. We recommend that you use QSettings to save an individual application's settings, e.g. window positions, recently used files, etc. When the application is restarted by the session manager, you can restore the settings. QSessionManager provides an interface between the application and the session manager so that the program can work well with the session manager. In Qt, session management requests for action are handled by the two virtual functions QApplication::commitData() and QApplication::saveState(). Both provide a reference to a session manager object as argument, to allow the application to communicate with the session manager. The session manager can only be accessed through these functions. No user interaction is possible \e unless the application gets explicit permission from the session manager. You ask for permission by calling allowsInteraction() or, if it's really urgent, allowsErrorInteraction(). Qt does not enforce this, but the session manager may. You can try to abort the shutdown process by calling cancel(). The default commitData() function does this if some top-level window rejected its closeEvent(). For sophisticated session managers provided on Unix/X11, QSessionManager offers further possibilities to fine-tune an application's session management behavior: setRestartCommand(), setDiscardCommand(), setRestartHint(), setProperty(), requestPhase2(). See the respective function descriptions for further details. \sa QApplication, {Session Management} */ /*! \enum QSessionManager::RestartHint This enum type defines the circumstances under which this application wants to be restarted by the session manager. The current values are \value RestartIfRunning if the application is still running when the session is shut down, it wants to be restarted at the start of the next session. \value RestartAnyway the application wants to be started at the start of the next session, no matter what. (This is useful for utilities that run just after startup and then quit.) \value RestartImmediately the application wants to be started immediately whenever it is not running. \value RestartNever the application does not want to be restarted automatically. The default hint is \c RestartIfRunning. */ /*! \fn QString QSessionManager::sessionId() const Returns the identifier of the current session. If the application has been restored from an earlier session, this identifier is the same as it was in that earlier session. \sa sessionKey(), QApplication::sessionId() */ /*! \fn QString QSessionManager::sessionKey() const Returns the session key in the current session. If the application has been restored from an earlier session, this key is the same as it was when the previous session ended. The session key changes with every call of commitData() or saveState(). \sa sessionId(), QApplication::sessionKey() */ /*! \fn void* QSessionManager::handle() const \internal */ /*! \fn bool QSessionManager::allowsInteraction() Asks the session manager for permission to interact with the user. Returns true if interaction is permitted; otherwise returns false. The rationale behind this mechanism is to make it possible to synchronize user interaction during a shutdown. Advanced session managers may ask all applications simultaneously to commit their data, resulting in a much faster shutdown. When the interaction is completed we strongly recommend releasing the user interaction semaphore with a call to release(). This way, other applications may get the chance to interact with the user while your application is still busy saving data. (The semaphore is implicitly released when the application exits.) If the user decides to cancel the shutdown process during the interaction phase, you must tell the session manager that this has happened by calling cancel(). Here's an example of how an application's QApplication::commitData() might be implemented: \code void MyApplication::commitData(QSessionManager& manager) { if (manager.allowsInteraction()) { int ret = QMessageBox::warning( mainWindow, tr("My Application"), tr("Save changes to document?"), QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel); switch (ret) { case QMessageBox::Save: manager.release(); if (!saveDocument()) manager.cancel(); break; case QMessageBox::Discard: break; case QMessageBox::Cancel: default: manager.cancel(); } } else { // we did not get permission to interact, then // do something reasonable instead } } \endcode If an error occurred within the application while saving its data, you may want to try allowsErrorInteraction() instead. \sa QApplication::commitData(), release(), cancel() */ /*! \fn bool QSessionManager::allowsErrorInteraction() Returns true if error interaction is permitted; otherwise returns false. This is similar to allowsInteraction(), but also enables the application to tell the user about any errors that occur. Session managers may give error interaction requests higher priority, which means that it is more likely that an error interaction is permitted. However, you are still not guaranteed that the session manager will allow interaction. \sa allowsInteraction(), release(), cancel() */ /*! \fn void QSessionManager::release() Releases the session manager's interaction semaphore after an interaction phase. \sa allowsInteraction(), allowsErrorInteraction() */ /*! \fn void QSessionManager::cancel() Tells the session manager to cancel the shutdown process. Applications should not call this function without first asking the user. \sa allowsInteraction(), allowsErrorInteraction() */ /*! \fn void QSessionManager::setRestartHint(RestartHint hint) Sets the application's restart hint to \a hint. On application startup the hint is set to \c RestartIfRunning. Note that these flags are only hints, a session manager may or may not respect them. We recommend setting the restart hint in QApplication::saveState() because most session managers perform a checkpoint shortly after an application's startup. \sa restartHint() */ /*! \fn QSessionManager::RestartHint QSessionManager::restartHint() const Returns the application's current restart hint. The default is \c RestartIfRunning. \sa setRestartHint() */ /*! \fn void QSessionManager::setRestartCommand(const QStringList& command) If the session manager is capable of restoring sessions it will execute \a command in order to restore the application. The command defaults to \code appname -session id \endcode The \c -session option is mandatory; otherwise QApplication cannot tell whether it has been restored or what the current session identifier is. See QApplication::isSessionRestored() and QApplication::sessionId() for details. If your application is very simple, it may be possible to store the entire application state in additional command line options. This is usually a very bad idea because command lines are often limited to a few hundred bytes. Instead, use QSettings, or temporary files or a database for this purpose. By marking the data with the unique sessionId(), you will be able to restore the application in a future session. \sa restartCommand(), setDiscardCommand(), setRestartHint() */ /*! \fn QStringList QSessionManager::restartCommand() const Returns the currently set restart command. To iterate over the list, you can use the \l foreach pseudo-keyword: \code foreach (QString command, mySession.restartCommand()) do_something(command); \endcode \sa setRestartCommand(), restartHint() */ /*! \fn void QSessionManager::setDiscardCommand(const QStringList& list) Sets the discard command to the given \a list. \sa discardCommand(), setRestartCommand() */ /*! \fn QStringList QSessionManager::discardCommand() const Returns the currently set discard command. To iterate over the list, you can use the \l foreach pseudo-keyword: \code foreach (QString command, mySession.discardCommand()) do_something(command); \endcode \sa setDiscardCommand(), restartCommand(), setRestartCommand() */ /*! \fn void QSessionManager::setManagerProperty(const QString &name, const QString &value) \overload Low-level write access to the application's identification and state records are kept in the session manager. The property called \a name has its value set to the string \a value. */ /*! \fn void QSessionManager::setManagerProperty(const QString& name, const QStringList& value) Low-level write access to the application's identification and state record are kept in the session manager. The property called \a name has its value set to the string list \a value. */ /*! \fn bool QSessionManager::isPhase2() const Returns true if the session manager is currently performing a second session management phase; otherwise returns false. \sa requestPhase2() */ /*! \fn void QSessionManager::requestPhase2() Requests a second session management phase for the application. The application may then return immediately from the QApplication::commitData() or QApplication::saveState() function, and they will be called again once most or all other applications have finished their session management. The two phases are useful for applications such as the X11 window manager that need to store information about another application's windows and therefore have to wait until these applications have completed their respective session management tasks. Note that if another application has requested a second phase it may get called before, simultaneously with, or after your application's second phase. \sa isPhase2() */ /***************************************************************************** Stubbed session management support *****************************************************************************/ #ifndef QT_NO_SESSIONMANAGER #if defined(Q_WS_WIN) || defined(Q_WS_MAC) || defined(Q_WS_QWS) class QSessionManagerPrivate : public QObjectPrivate { public: QStringList restartCommand; QStringList discardCommand; QString sessionId; QString sessionKey; QSessionManager::RestartHint restartHint; }; QSessionManager* qt_session_manager_self = 0; QSessionManager::QSessionManager(QApplication * app, QString &id, QString &key) : QObject(*new QSessionManagerPrivate, app) { Q_D(QSessionManager); setObjectName(QLatin1String("qt_sessionmanager")); qt_session_manager_self = this; #if defined(Q_WS_WIN) && !defined(Q_OS_TEMP) wchar_t guidstr[40]; GUID guid; CoCreateGuid(&guid); StringFromGUID2(guid, guidstr, 40); id = QString::fromUtf16((ushort*)guidstr); CoCreateGuid(&guid); StringFromGUID2(guid, guidstr, 40); key = QString::fromUtf16((ushort*)guidstr); #endif d->sessionId = id; d->sessionKey = key; d->restartHint = RestartIfRunning; } QSessionManager::~QSessionManager() { qt_session_manager_self = 0; } QString QSessionManager::sessionId() const { Q_D(const QSessionManager); return d->sessionId; } QString QSessionManager::sessionKey() const { Q_D(const QSessionManager); return d->sessionKey; } #if defined(Q_WS_X11) || defined(Q_WS_MAC) void* QSessionManager::handle() const { return 0; } #endif #if !defined(Q_WS_WIN) bool QSessionManager::allowsInteraction() { return true; } bool QSessionManager::allowsErrorInteraction() { return true; } void QSessionManager::release() { } void QSessionManager::cancel() { } #endif void QSessionManager::setRestartHint(QSessionManager::RestartHint hint) { Q_D(QSessionManager); d->restartHint = hint; } QSessionManager::RestartHint QSessionManager::restartHint() const { Q_D(const QSessionManager); return d->restartHint; } void QSessionManager::setRestartCommand(const QStringList& command) { Q_D(QSessionManager); d->restartCommand = command; } QStringList QSessionManager::restartCommand() const { Q_D(const QSessionManager); return d->restartCommand; } void QSessionManager::setDiscardCommand(const QStringList& command) { Q_D(QSessionManager); d->discardCommand = command; } QStringList QSessionManager::discardCommand() const { Q_D(const QSessionManager); return d->discardCommand; } void QSessionManager::setManagerProperty(const QString&, const QString&) { } void QSessionManager::setManagerProperty(const QString&, const QStringList&) { } bool QSessionManager::isPhase2() const { return false; } void QSessionManager::requestPhase2() { } #endif #endif // QT_NO_SESSIONMANAGER /*! \typedef QApplication::ColorMode \compat Use ColorSpec instead. */ /*! \fn Qt::MacintoshVersion QApplication::macVersion() Use QSysInfo::MacintoshVersion instead. */ /*! \fn QApplication::ColorMode QApplication::colorMode() Use colorSpec() instead, and use ColorSpec as the enum type. */ /*! \fn void QApplication::setColorMode(ColorMode mode) Use setColorSpec() instead, and pass a ColorSpec value instead. */ /*! \fn bool QApplication::hasGlobalMouseTracking() This feature does not exist anymore. This function always returns true in Qt 4. */ /*! \fn void QApplication::setGlobalMouseTracking(bool dummy) This function does nothing in Qt 4. The \a dummy parameter is ignored. */ /*! \fn void QApplication::flushX() Use flush() instead. */ /*! \fn void QApplication::setWinStyleHighlightColor(const QColor &c) Use the palette instead. \oldcode app.setWinStyleHighlightColor(color); \newcode QPalette palette(qApp->palette()); palette.setColor(QPalette::Highlight, color); qApp->setPalette(palette); \endcode */ /*! \fn void QApplication::setPalette(const QPalette &pal, bool b, const char* className = 0) Use the two-argument overload instead. */ /*! \fn void QApplication::setFont(const QFont &font, bool b, const char* className = 0) Use the two-argument overload instead. */ /*! \fn const QColor &QApplication::winStyleHighlightColor() Use qApp->palette().color(QPalette::Active, QPalette::Highlight) instead. */ /*! \fn QWidget *QApplication::widgetAt(int x, int y, bool child) Use the two-argument widgetAt() overload to get the child widget. To get the top-level widget do this: \code QWidget *widget = qApp->widgetAt(x, y); if (widget) widget = widget->window(); \endcode */ /*! \fn QWidget *QApplication::widgetAt(const QPoint &point, bool child) Use the single-argument widgetAt() overload to get the child widget. To get the top-level widget do this: \code QWidget *widget = qApp->widgetAt(point); if (widget) widget = widget->window(); \endcode */ #ifdef QT3_SUPPORT QWidget *QApplication::mainWidget() { return QApplicationPrivate::main_widget; } #endif bool QApplicationPrivate::inPopupMode() const { return QApplicationPrivate::popupWidgets != 0; } /*! \property QApplication::quitOnLastWindowClosed \brief whether the application implicitly quits when the last window is closed. The default is true. If this property is true, the applications quits 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. \sa quit(), QWidget::close() */ void QApplication::setQuitOnLastWindowClosed(bool quit) { QApplicationPrivate::quitOnLastWindowClosed = quit; } bool QApplication::quitOnLastWindowClosed() { return QApplicationPrivate::quitOnLastWindowClosed; } void QApplicationPrivate::emitLastWindowClosed() { if (qApp && qApp->d_func()->in_exec) { if (QApplicationPrivate::quitOnLastWindowClosed) qApp->quit(); emit qApp->lastWindowClosed(); } } void QApplicationPrivate::_q_tryEmitLastWindowClosed() { tryEmitLastWindowClosedPending = false; /* if there is no non-withdrawn primary window left (except the ones without QuitOnClose), we emit the lastWindowClosed signal */ QWidgetList list = QApplication::topLevelWidgets(); bool lastWindowClosed = true; for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (!w->isVisible() || (w->parentWidget() && w->parentWidget()->isVisible()) || !w->testAttribute(Qt::WA_QuitOnClose)) { continue; } lastWindowClosed = false; break; } if (lastWindowClosed) emitLastWindowClosed(); } /*! \variable QApplication::NormalColors \compat Use \l NormalColor instead. */ /*! \variable QApplication::CustomColors \compat Use \l CustomColor instead. */ #ifdef QT_KEYPAD_NAVIGATION /*! Sets whether Qt should use focus navigation suitable for use with a minimal keypad. If \a enable is true, Qt::Key_Up and Qt::Key_Down are used to change focus. This feature is available in Qtopia Core only. \sa keypadNavigationEnabled() */ void QApplication::setKeypadNavigationEnabled(bool enable) { QApplicationPrivate::keypadNavigation = enable; } /*! Returns true if Qt is set to use keypad navigation; otherwise returns false. The default is false. This feature is available in Qtopia Core only. \sa setKeypadNavigationEnabled() */ bool QApplication::keypadNavigationEnabled() { return QApplicationPrivate::keypadNavigation; } #endif /*! \macro qApp \relates QApplication A global pointer referring to the unique application object. It is equivalent to the pointer returned by the QCoreApplication::instance() function except that, in GUI applications, it is a pointer to a QApplication instance. Only one application object can be created. \sa QCoreApplication::instance() */ // ************************************************************************ // Input Method support // ************************************************************************ /*! This function replaces the QInputContext instance used by the application with \a inputContext. \sa inputContext() */ void QApplication::setInputContext(QInputContext *inputContext) { Q_D(QApplication); Q_UNUSED(d);// only static members being used. if (!inputContext) { qWarning("QApplication::setInputContext: called with 0 input context"); return; } if (d->inputContext) delete d->inputContext; d->inputContext = inputContext; } /*! Returns the QInputContext instance used by the application. \sa setInputContext() */ QInputContext *QApplication::inputContext() const { Q_D(const QApplication); Q_UNUSED(d);// only static members being used. #ifdef Q_WS_X11 if (!X11) return 0; if (!d->inputContext) { QApplication *that = const_cast(this); that->d_func()->inputContext = QInputContextFactory::create(X11->default_im, that); } #endif return d->inputContext; } //Returns the current platform used by keyBindings uint QApplicationPrivate::currentPlatform(){ uint platform = KB_Win; #ifdef Q_WS_MAC platform = KB_Mac; #elif defined Q_WS_X11 platform = KB_X11; if (X11->desktopEnvironment == DE_KDE) platform |= KB_KDE; if (X11->desktopEnvironment == DE_GNOME) platform |= KB_Gnome; if (X11->desktopEnvironment == DE_CDE) platform |= KB_CDE; #endif return platform; } /*! \since 4.2 Returns the current keyboard input locale. */ QLocale QApplication::keyboardInputLocale() { if (!QApplicationPrivate::checkInstance("keyboardInputLocale")) return QLocale::c(); return qt_keymapper_private()->keyboardInputLocale; } /*! \since 4.2 Returns the current keyboard input direction. */ Qt::LayoutDirection QApplication::keyboardInputDirection() { if (!QApplicationPrivate::checkInstance("keyboardInputDirection")) return Qt::LeftToRight; return qt_keymapper_private()->keyboardInputDirection; } #include "moc_qapplication.cpp"