/**************************************************************************** ** ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the QtCore 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 "qmetaobject.h" #include "qmetatype.h" #include "qobject.h" #include #include #include #include #include #include #include #include #include #include #include "private/qobject_p.h" #include "private/qmetaobject_p.h" #include /*! \class QMetaObject \brief The QMetaObject class contains meta-information about Qt objects. \ingroup objectmodel The Qt \l{Meta-Object System} in Qt is responsible for the signals and slots inter-object communication mechanism, runtime type information, and the Qt property system. A single QMetaObject instance is created for each QObject subclass that is used in an application, and this instance stores all the meta-information for the QObject subclass. This object is available as QObject::metaObject(). This class is not normally required for application programming, but it is useful if you write meta-applications, such as scripting engines or GUI builders. The functions you are most likely to find useful are these: \list \o className() returns the name of a class. \o superClass() returns the superclass's meta-object. \o method() and methodCount() provide information about a class's meta-methods (signals, slots and other member functions). \o enumerator() and enumeratorCount() and provide information about a class's enumerators. \o propertyCount() and property() provide information about a class's properties. \endlist The index functions indexOfMethod(), indexOfEnumerator(), and indexOfProperty() map names of member functions, enumerators, or properties to indexes in the meta-object. For example, Qt uses indexOfMethod() internally when you connect a signal to a slot. Classes can also have a list of \e{name}--\e{value} pairs of additional class information, stored in QMetaClassInfo objects. The number of pairs is returned by classInfoCount(), single pairs are returned by classInfo(), and you can search for pairs with indexOfClassInfo(). \sa QMetaClassInfo, QMetaEnum, QMetaMethod, QMetaProperty, QMetaType, {Meta-Object System} */ /*! \enum QMetaObject::Call \internal \value InvokeSlot \value EmitSignal \value ReadProperty \value WriteProperty \value ResetProperty \value QueryPropertyDesignable \value QueryPropertyScriptable \value QueryPropertyStored \value QueryPropertyEditable \value QueryPropertyUser */ /*! \enum QMetaMethod::Access \internal */ // do not touch without touching the moc as well enum PropertyFlags { Invalid = 0x00000000, Readable = 0x00000001, Writable = 0x00000002, Resettable = 0x00000004, EnumOrFlag = 0x00000008, StdCppSet = 0x00000100, // Override = 0x00000200, Designable = 0x00001000, ResolveDesignable = 0x00002000, Scriptable = 0x00004000, ResolveScriptable = 0x00008000, Stored = 0x00010000, ResolveStored = 0x00020000, Editable = 0x00040000, ResolveEditable = 0x00080000, User = 0x00100000, ResolveUser = 0x00200000 }; enum MethodFlags { AccessPrivate = 0x00, AccessProtected = 0x01, AccessPublic = 0x02, AccessMask = 0x03, //mask MethodMethod = 0x00, MethodSignal = 0x04, MethodSlot = 0x08, MethodTypeMask = 0x0c, MethodCompatibility = 0x10, MethodCloned = 0x20, MethodScriptable = 0x40 }; struct QMetaObjectPrivate { int revision; int className; int classInfoCount, classInfoData; int methodCount, methodData; int propertyCount, propertyData; int enumeratorCount, enumeratorData; }; static inline const QMetaObjectPrivate *priv(const uint* data) { return reinterpret_cast(data); } /*! \fn const char *QMetaObject::className() const Returns the class name. \sa superClass() */ /*! \fn QMetaObject *QMetaObject::superClass() const Returns the meta-object of the superclass, or 0 if there is no such object. \sa className() */ /*! \internal Returns \a obj if object \a obj inherits from this meta-object; otherwise returns 0. */ QObject *QMetaObject::cast(QObject *obj) const { if (obj) { const QMetaObject *m = obj->metaObject(); do { if (m == this) return const_cast(obj); } while ((m = m->d.superdata)); } return 0; } #ifndef QT_NO_TRANSLATION /*! \internal */ QString QMetaObject::tr(const char *s, const char *c) const { return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::CodecForTr); } /*! \internal */ QString QMetaObject::tr(const char *s, const char *c, int n) const { return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::CodecForTr, n); } /*! \internal */ QString QMetaObject::trUtf8(const char *s, const char *c) const { return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::UnicodeUTF8); } /*! \internal */ QString QMetaObject::trUtf8(const char *s, const char *c, int n) const { return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::UnicodeUTF8, n); } #endif // QT_NO_TRANSLATION /*! Returns the method offset for this class; i.e. the index position of this class's first member function. The offset is the sum of all the methods in the class's superclasses (which is always positive since QObject has the deleteLater() slot and a destroyed() signal). \sa method(), methodCount(), indexOfMethod() */ int QMetaObject::methodOffset() const { int offset = 0; const QMetaObject *m = d.superdata; while (m) { offset += priv(m->d.data)->methodCount; m = m->d.superdata; } return offset; } /*! Returns the enumerator offset for this class; i.e. the index position of this class's first enumerator. If the class has no superclasses with enumerators, the offset is 0; otherwise the offset is the sum of all the enumerators in the class's superclasses. \sa enumerator(), enumeratorCount(), indexOfEnumerator() */ int QMetaObject::enumeratorOffset() const { int offset = 0; const QMetaObject *m = d.superdata; while (m) { offset += priv(m->d.data)->enumeratorCount; m = m->d.superdata; } return offset; } /*! Returns the property offset for this class; i.e. the index position of this class's first property. The offset is the sum of all the properties in the class's superclasses (which is always positive since QObject has the name() property). \sa property(), propertyCount(), indexOfProperty() */ int QMetaObject::propertyOffset() const { int offset = 0; const QMetaObject *m = d.superdata; while (m) { offset += priv(m->d.data)->propertyCount; m = m->d.superdata; } return offset; } /*! Returns the class information offset for this class; i.e. the index position of this class's first class information item. If the class has no superclasses with class information, the offset is 0; otherwise the offset is the sum of all the class information items in the class's superclasses. \sa classInfo(), classInfoCount(), indexOfClassInfo() */ int QMetaObject::classInfoOffset() const { int offset = 0; const QMetaObject *m = d.superdata; while (m) { offset += priv(m->d.data)->classInfoCount; m = m->d.superdata; } return offset; } /*! Returns the number of methods in this class. These include ordinary methods, signals, and slots. \sa method(), methodOffset(), indexOfMethod() */ int QMetaObject::methodCount() const { int n = priv(d.data)->methodCount; const QMetaObject *m = d.superdata; while (m) { n += priv(m->d.data)->methodCount; m = m->d.superdata; } return n; } /*! Returns the number of enumerators in this class. \sa enumerator(), enumeratorOffset(), indexOfEnumerator() */ int QMetaObject::enumeratorCount() const { int n = priv(d.data)->enumeratorCount; const QMetaObject *m = d.superdata; while (m) { n += priv(m->d.data)->enumeratorCount; m = m->d.superdata; } return n; } /*! Returns the number of properties in this class. \sa property(), propertyOffset(), indexOfProperty() */ int QMetaObject::propertyCount() const { int n = priv(d.data)->propertyCount; const QMetaObject *m = d.superdata; while (m) { n += priv(m->d.data)->propertyCount; m = m->d.superdata; } return n; } /*! Returns the number of items of class information in this class. \sa classInfo(), classInfoOffset(), indexOfClassInfo() */ int QMetaObject::classInfoCount() const { int n = priv(d.data)->classInfoCount; const QMetaObject *m = d.superdata; while (m) { n += priv(m->d.data)->classInfoCount; m = m->d.superdata; } return n; } /*! Finds \a method and returns its index; otherwise returns -1. Note that the \a method has to be in normalized form, as returned by normalizedSignature(). \sa method(), methodCount(), methodOffset(), normalizedSignature() */ int QMetaObject::indexOfMethod(const char *method) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->methodCount-1; i >= 0; --i) if (strcmp(method, m->d.stringdata + m->d.data[priv(m->d.data)->methodData + 5*i]) == 0) { i += m->methodOffset(); break; } m = m->d.superdata; } return i; } /*! Finds \a signal and returns its index; otherwise returns -1. This is the same as indexOfMethod(), except that it will return -1 if the method exists but isn't a signal. Note that the \a signal has to be in normalized form, as returned by normalizedSignature(). \sa indexOfMethod(), normalizedSignature(), method(), methodCount(), methodOffset() */ int QMetaObject::indexOfSignal(const char *signal) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->methodCount-1; i >= 0; --i) if ((m->d.data[priv(m->d.data)->methodData + 5*i + 4] & MethodTypeMask) == MethodSignal && strcmp(signal, m->d.stringdata + m->d.data[priv(m->d.data)->methodData + 5*i]) == 0) { i += m->methodOffset(); break; } m = m->d.superdata; } #ifndef QT_NO_DEBUG if (i >= 0 && m && m->d.superdata) { int conflict = m->d.superdata->indexOfMethod(signal); if (conflict >= 0) qWarning("QMetaObject::indexOfSignal:%s: Conflict with %s::%s", m->d.stringdata, m->d.superdata->d.stringdata, signal); } #endif return i; } /*! Finds \a slot and returns its index; otherwise returns -1. This is the same as indexOfMethod(), except that it will return -1 if the method exists but isn't a slot. \sa indexOfMethod(), method(), methodCount(), methodOffset() */ int QMetaObject::indexOfSlot(const char *slot) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->methodCount-1; i >= 0; --i) if ((m->d.data[priv(m->d.data)->methodData + 5*i + 4] & MethodTypeMask) == MethodSlot && strcmp(slot, m->d.stringdata + m->d.data[priv(m->d.data)->methodData + 5*i]) == 0) { i += m->methodOffset(); break; } m = m->d.superdata; } return i; } static const QMetaObject *QMetaObject_findMetaObject(const QMetaObject *self, const char *name) { while (self) { if (strcmp(self->d.stringdata, name) == 0) return self; if (self->d.extradata) { const QMetaObject **e = self->d.extradata; while (*e) { if (const QMetaObject *m =QMetaObject_findMetaObject((*e), name)) return m; ++e; } } self = self->d.superdata; } return self; } /*! Finds enumerator \a name and returns its index; otherwise returns -1. \sa enumerator(), enumeratorCount(), enumeratorOffset() */ int QMetaObject::indexOfEnumerator(const char *name) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->enumeratorCount-1; i >= 0; --i) if (strcmp(name, m->d.stringdata + m->d.data[priv(m->d.data)->enumeratorData + 4*i]) == 0) { i += m->enumeratorOffset(); break; } m = m->d.superdata; } return i; } /*! Finds property \a name and returns its index; otherwise returns -1. \sa property(), propertyCount(), propertyOffset() */ int QMetaObject::indexOfProperty(const char *name) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->propertyCount-1; i >= 0; --i) if (strcmp(name, m->d.stringdata + m->d.data[priv(m->d.data)->propertyData + 3*i]) == 0) { i += m->propertyOffset(); break; } m = m->d.superdata; } return i; } /*! Finds class information item \a name and returns its index; otherwise returns -1. \sa classInfo(), classInfoCount(), classInfoOffset() */ int QMetaObject::indexOfClassInfo(const char *name) const { int i = -1; const QMetaObject *m = this; while (m && i < 0) { for (i = priv(m->d.data)->classInfoCount-1; i >= 0; --i) if (strcmp(name, m->d.stringdata + m->d.data[priv(d.data)->classInfoData + 2*i]) == 0) { i += m->classInfoOffset(); break; } m = m->d.superdata; } return i; } /*! Returns the meta-data for the method with the given \a index. \sa methodCount(), methodOffset(), indexOfMethod() */ QMetaMethod QMetaObject::method(int index) const { int i = index; i -= methodOffset(); if (i < 0 && d.superdata) return d.superdata->method(index); QMetaMethod result; if (i >= 0 && i < priv(d.data)->methodCount) { result.mobj = this; result.handle = priv(d.data)->methodData + 5*i; } return result; } /*! Returns the meta-data for the enumerator with the given \a index. \sa enumeratorCount(), enumeratorOffset(), indexOfEnumerator() */ QMetaEnum QMetaObject::enumerator(int index) const { int i = index; i -= enumeratorOffset(); if (i < 0 && d.superdata) return d.superdata->enumerator(index); QMetaEnum result; if (i >= 0 && i < priv(d.data)->enumeratorCount) { result.mobj = this; result.handle = priv(d.data)->enumeratorData + 4*i; } return result; } /*! Returns the meta-data for the property with the given \a index. If no such property exists, a null QMetaProperty is returned. \sa propertyCount(), propertyOffset(), indexOfProperty() */ QMetaProperty QMetaObject::property(int index) const { int i = index; i -= propertyOffset(); if (i < 0 && d.superdata) return d.superdata->property(index); QMetaProperty result; if (i >= 0 && i < priv(d.data)->propertyCount) { int handle = priv(d.data)->propertyData + 3*i; int flags = d.data[handle + 2]; const char *type = d.stringdata + d.data[handle + 1]; result.mobj = this; result.handle = handle; result.idx = i; if (flags & EnumOrFlag) { result.menum = enumerator(indexOfEnumerator(type)); if (!result.menum.isValid()) { QByteArray enum_name = type; QByteArray scope_name = d.stringdata; int s = enum_name.lastIndexOf("::"); if (s > 0) { scope_name = enum_name.left(s); enum_name = enum_name.mid(s + 2); } const QMetaObject *scope = 0; if (scope_name == "Qt") scope = &QObject::staticQtMetaObject; else scope = QMetaObject_findMetaObject(this, scope_name); if (scope) result.menum = scope->enumerator(scope->indexOfEnumerator(enum_name)); } } } return result; } /*! \since 4.2 Returns the property that has the \c USER flag set to true. \sa QMetaProperty::isUser() */ QMetaProperty QMetaObject::userProperty() const { const int propCount = propertyCount(); for (int i = propCount - 1; i >= 0; --i) { const QMetaProperty prop = property(i); if (prop.isUser()) return prop; } return QMetaProperty(); } /*! Returns the meta-data for the item of class information with the given \a index. Example: \code class MyClass { Q_OBJECT Q_CLASSINFO("author", "Sabrina Schweinsteiger") Q_CLASSINFO("url", "http://doc.moosesoft.co.uk/1.0/") public: ... }; \endcode \sa classInfoCount(), classInfoOffset(), indexOfClassInfo() */ QMetaClassInfo QMetaObject::classInfo(int index) const { int i = index; i -= classInfoOffset(); if (i < 0 && d.superdata) return d.superdata->classInfo(index); QMetaClassInfo result; if (i >= 0 && i < priv(d.data)->classInfoCount) { result.mobj = this; result.handle = priv(d.data)->classInfoData + 2*i; } return result; } /*! Returns true if the \a signal and \a method arguments are compatible; otherwise returns false. Both \a signal and \a method are expected to be normalized. \sa normalizedSignature() */ bool QMetaObject::checkConnectArgs(const char *signal, const char *method) { const char *s1 = signal; const char *s2 = method; while (*s1++ != '(') { } // scan to first '(' while (*s2++ != '(') { } if (*s2 == ')' || qstrcmp(s1,s2) == 0) // method has no args or return true; // exact match int s1len = qstrlen(s1); int s2len = qstrlen(s2); if (s2len < s1len && strncmp(s1,s2,s2len-1)==0 && s1[s2len-1]==',') return true; // method has less args return false; } static void qRemoveWhitespace(const char *s, char *d) { char last = 0; while (*s && is_space(*s)) s++; while (*s) { while (*s && !is_space(*s)) last = *d++ = *s++; while (*s && is_space(*s)) s++; if (*s && is_ident_char(*s) && is_ident_char(last)) last = *d++ = ' '; } *d = '\0'; } static char *qNormalizeType(char *d, int &templdepth, QByteArray &result) { const char *t = d; while (*d && (templdepth || (*d != ',' && *d != ')'))) { if (*d == '<') ++templdepth; if (*d == '>') --templdepth; ++d; } if (strncmp("void", t, d - t) != 0) result += normalizeTypeInternal(t, d); return d; } /*! \since 4.2 Normalizes a \a type. See QMetaObject::normalizedSignature() for a description on how Qt normalizes. Example: \code QByteArray normType = QMetaObject::normalizedType(" int const *"); // normType is now "const int*" \endcode \sa normalizedSignature() */ QByteArray QMetaObject::normalizedType(const char *type) { QByteArray result; if (!type || !*type) return result; QVarLengthArray stackbuf((int)strlen(type)); qRemoveWhitespace(type, stackbuf.data()); int templdepth = 0; qNormalizeType(stackbuf.data(), templdepth, result); return result; } /*! Normalizes the signature of the given \a method. Qt uses normalized signatures to decide whether two given signals and slots are compatible. Normalization reduces whitespace to a minimum, moves 'const' to the front where appropriate, removes 'const' from value types and replaces const references with values. \sa checkConnectArgs(), normalizedType() */ QByteArray QMetaObject::normalizedSignature(const char *method) { QByteArray result; if (!method || !*method) return result; int len = int(strlen(method)); char stackbuf[64]; char *buf = (len >= 64 ? new char[len+1] : stackbuf); qRemoveWhitespace(method, buf); char *d = buf; result.reserve(len); int argdepth = 0; int templdepth = 0; while (*d) { if (argdepth == 1) d = qNormalizeType(d, templdepth, result); if (*d == '(') ++argdepth; if (*d == ')') --argdepth; result += *d++; } if (buf != stackbuf) delete [] buf; return result; } /*! Invokes the \a member (a signal or a slot name) on the object \a obj. Returns true if the member could be invoked. Returns false if there is no such member or the parameters did not match. The invocation can be either synchronous or asynchronous, depending on \a type: \list \o If \a type is Qt::DirectConnection, the member will be invoked immediately. \o If \a type is Qt::QueuedConnection, a QEvent will be sent and the member is invoked as soon as the application enters the main event loop. \o If \a type is Qt::AutoConnection, the member is invoked synchronously if \a obj lives in the same thread as the caller; otherwise it will invoke the member asynchronously. \endlist The return value of the \a member function call is placed in \a ret. If the invocation is asynchronous, the return value cannot be evaluated. You can pass up to ten arguments (\a val0, \a val1, \a val2, \a val3, \a val4, \a val5, \a val6, \a val7, \a val8, and \a val9) to the \a member function. QGenericArgument and QGenericReturnArgument are internal helper classes. Because signals and slots can be dynamically invoked, you must enclose the arguments using the Q_ARG() and Q_RETURN_ARG() macros. Q_ARG() takes a type name and a const reference of that type; Q_RETURN_ARG() takes a type name and a non-const reference. To asynchronously invoke the \l{QPushButton::animateClick()}{animateClick()} slot on a QPushButton: \code QMetaObject::invokeMethod(pushButton, "animateClick", Qt::QueuedConnection); \endcode With asynchronous method invocations, the parameters must be of types that are known to Qt's meta-object system, because Qt needs to copy the arguments to store them in an event behind the scenes. If you try to use a queued connection and get the error message \code QMetaObject::invokeMethod: Unable to handle unregistered datatype 'MyType' \endcode call qRegisterMetaType() to register the data type before you call invokeMethod(). To synchronously invoke the \c compute(QString, int, double) slot on some arbitrary object \c obj retrieve its return value: \code QString retVal; QMetaObject::invokeMethod(obj, "compute", Qt::DirectConnection, Q_RETURN_ARG(QString, retVal), Q_ARG(QString, "sqrt"), Q_ARG(int, 42), Q_ARG(double, 9.7)); \endcode If the "compute" slot does not take exactly one QString, one int and one double in the specified order, the call will fail. \sa Q_ARG(), Q_RETURN_ARG(), qRegisterMetaType() */ bool QMetaObject::invokeMethod(QObject *obj, const char *member, Qt::ConnectionType type, QGenericReturnArgument ret, QGenericArgument val0, QGenericArgument val1, QGenericArgument val2, QGenericArgument val3, QGenericArgument val4, QGenericArgument val5, QGenericArgument val6, QGenericArgument val7, QGenericArgument val8, QGenericArgument val9) { if (!obj) return false; QVarLengthArray sig; int len = qstrlen(member); if (len <= 0) return false; sig.append(member, len); sig.append('('); enum { MaximumParamCount = 11 }; const char *typeNames[] = {ret.name(), val0.name(), val1.name(), val2.name(), val3.name(), val4.name(), val5.name(), val6.name(), val7.name(), val8.name(), val9.name()}; int paramCount; for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) { len = qstrlen(typeNames[paramCount]); if (len <= 0) break; sig.append(typeNames[paramCount], len); sig.append(','); } if (paramCount == 1) sig.append(')'); // no parameters else sig[sig.size() - 1] = ')'; sig.append('\0'); int idx = obj->metaObject()->indexOfMethod(sig.constData()); if (idx < 0) { QByteArray norm = QMetaObject::normalizedSignature(sig.constData()); idx = obj->metaObject()->indexOfMethod(norm.constData()); } if (idx < 0) return false; // check return type if (ret.data()) { const char *retType = obj->metaObject()->method(idx).typeName(); if (qstrcmp(ret.name(), retType) != 0) { // normalize the return value as well // the trick here is to make a function signature out of the return type // so that we can call normalizedSignature() and avoid duplicating code QByteArray unnormalized; int len = qstrlen(ret.name()); unnormalized.reserve(len + 3); unnormalized = "_("; // the function is called "_" unnormalized.append(ret.name()); unnormalized.append(')'); QByteArray normalized = QMetaObject::normalizedSignature(unnormalized.constData()); normalized.truncate(normalized.length() - 1); // drop the ending ')' if (qstrcmp(normalized.constData() + 2, retType) != 0) return false; } } void *param[] = {ret.data(), val0.data(), val1.data(), val2.data(), val3.data(), val4.data(), val5.data(), val6.data(), val7.data(), val8.data(), val9.data()}; if (type == Qt::AutoConnection) { type = QThread::currentThread() == obj->thread() ? Qt::DirectConnection : Qt::QueuedConnection; } if (type == Qt::DirectConnection) { return obj->qt_metacall(QMetaObject::InvokeMetaMethod, idx, param) < 0; } else { if (ret.data()) { qWarning("QMetaObject::invokeMethod: Unable to invoke methods with return values in queued " "connections"); return false; } int nargs = 1; // include return type void **args = (void **) qMalloc(paramCount * sizeof(void *)); int *types = (int *) qMalloc(paramCount * sizeof(int)); types[0] = 0; // return type args[0] = 0; for (int i = 1; i < paramCount; ++i) { types[i] = QMetaType::type(typeNames[i]); if (types[i]) { args[i] = QMetaType::construct(types[i], param[i]); ++nargs; } else if (param[i]) { qWarning("QMetaObject::invokeMethod: Unable to handle unregistered datatype '%s'", typeNames[i]); return false; } } if (type == Qt::QueuedConnection) { QCoreApplication::postEvent(obj, new QMetaCallEvent(idx, 0, -1, -1, nargs, types, args)); } else { if (QThread::currentThread() == obj->thread()) { qWarning("QMetaObject::invokeMethod: Dead lock detected in BlockingQueuedConnection: " "Receiver is %s(%p)", obj->metaObject()->className(), obj); } // blocking queued connection #ifdef QT_NO_THREAD QCoreApplication::postEvent(obj, new QMetaCallEvent(idx, 0, -1, -1, nargs, types, args)); #else QSemaphore semaphore; QCoreApplication::postEvent(obj, new QMetaCallEvent(idx, 0, -1, -1, nargs, types, args, &semaphore)); semaphore.acquire(); #endif // QT_NO_THREAD } } return true; } /*! \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member, QGenericReturnArgument ret, QGenericArgument val0 = QGenericArgument(0), QGenericArgument val1 = QGenericArgument(), QGenericArgument val2 = QGenericArgument(), QGenericArgument val3 = QGenericArgument(), QGenericArgument val4 = QGenericArgument(), QGenericArgument val5 = QGenericArgument(), QGenericArgument val6 = QGenericArgument(), QGenericArgument val7 = QGenericArgument(), QGenericArgument val8 = QGenericArgument(), QGenericArgument val9 = QGenericArgument()); \overload This overload always invokes the member using the connection type Qt::AutoConnection. */ /*! \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member, Qt::ConnectionType type, QGenericArgument val0 = QGenericArgument(0), QGenericArgument val1 = QGenericArgument(), QGenericArgument val2 = QGenericArgument(), QGenericArgument val3 = QGenericArgument(), QGenericArgument val4 = QGenericArgument(), QGenericArgument val5 = QGenericArgument(), QGenericArgument val6 = QGenericArgument(), QGenericArgument val7 = QGenericArgument(), QGenericArgument val8 = QGenericArgument(), QGenericArgument val9 = QGenericArgument()) \overload This overload can be used if the return value of the member is of no interest. */ /*! \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member, QGenericArgument val0 = QGenericArgument(0), QGenericArgument val1 = QGenericArgument(), QGenericArgument val2 = QGenericArgument(), QGenericArgument val3 = QGenericArgument(), QGenericArgument val4 = QGenericArgument(), QGenericArgument val5 = QGenericArgument(), QGenericArgument val6 = QGenericArgument(), QGenericArgument val7 = QGenericArgument(), QGenericArgument val8 = QGenericArgument(), QGenericArgument val9 = QGenericArgument()) \overload This overload invokes the member using the connection type Qt::AutoConnection and ignores return values. */ /*! \class QMetaMethod \brief The QMetaMethod class provides meta-data about a member function. \ingroup objectmodel A QMetaMethod has a methodType(), a signature(), a list of parameterTypes() and parameterNames(), a return typeName(), a tag(), and an access() specifier. \sa QMetaObject, QMetaEnum, QMetaProperty, {Qt's Property System} */ /*! \enum QMetaMethod::Attributes \internal \value Compatibility \value Cloned \value Scriptable */ /*! \enum QMetaMethod::MethodType \value Method The function is a plain member function. \value Signal The function is a signal. \value Slot The function is a slot. */ /*! \fn QMetaMethod::QMetaMethod() \internal */ /*! Returns the signature of this method (e.g., \c{setValue(double)}). \sa parameterTypes(), parameterNames() */ const char *QMetaMethod::signature() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle]; } /*! Returns a list of parameter types. \sa parameterNames(), signature() */ QList QMetaMethod::parameterTypes() const { QList list; if (!mobj) return list; const char *signature = mobj->d.stringdata + mobj->d.data[handle]; while (*signature && *signature != '(') ++signature; while (*signature && *signature != ')' && *++signature != ')') { const char *begin = signature; int level = 0; while (*signature && (level > 0 || *signature != ',') && *signature != ')') { if (*signature == '<') ++level; else if (*signature == '>') --level; ++signature; } list += QByteArray(begin, signature - begin); } return list; } /*! Returns a list of parameter names. \sa parameterTypes(), signature() */ QList QMetaMethod::parameterNames() const { QList list; if (!mobj) return list; const char *names = mobj->d.stringdata + mobj->d.data[handle + 1]; if (*names == 0) { // do we have one or zero arguments? const char *signature = mobj->d.stringdata + mobj->d.data[handle]; while (*signature && *signature != '(') ++signature; if (*++signature != ')') list += QByteArray(); } else { --names; do { const char *begin = ++names; while (*names && *names != ',') ++names; list += QByteArray(begin, names - begin); } while (*names); } return list; } /*! Returns the return type of this method, or an empty string if the return type is \e void. */ const char *QMetaMethod::typeName() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle + 2]; } /*! Returns the tag associated with this method. Tags are special macros recognized by \c moc that make it possible to add extra information about a method. For the moment, \c moc doesn't support any special tags. */ const char *QMetaMethod::tag() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle + 3]; } /*! \internal */ int QMetaMethod::attributes() const { if (!mobj) return false; return ((mobj->d.data[handle + 4])>>4); } /*! Returns the access specification of this method (private, protected, or public). Signals are always protected, meaning that you can only emit them from the class or from a subclass. \sa methodType() */ QMetaMethod::Access QMetaMethod::access() const { if (!mobj) return Private; return (QMetaMethod::Access)(mobj->d.data[handle + 4] & AccessMask); } /*! Returns the type of this method (signal, slot, or method). \sa access() */ QMetaMethod::MethodType QMetaMethod::methodType() const { if (!mobj) return QMetaMethod::Method; return (QMetaMethod::MethodType)((mobj->d.data[handle + 4] & MethodTypeMask)>>2); } /*! \class QMetaEnum \brief The QMetaEnum class provides meta-data about an enumerator. \ingroup objectmodel Use name() for the enumerator's name. The enumerator's keys (names of each enumerated item) are returned by key(); use keyCount() to find the number of keys. isFlag() returns whether the enumerator is meant to be used as a flag, meaning that its values can be combined using the OR operator. The conversion functions keyToValue(), valueToKey(), keysToValue(), and valueToKeys() allow conversion between the integer representation of an enumeration or set value and its literal representation. The scope() function returns the class scope this enumerator was declared in. \sa QMetaObject, QMetaMethod, QMetaProperty */ /*! \fn bool QMetaEnum::isValid() const Returns true if this enum is valid (has a name); otherwise returns false. \sa name() */ /*! \fn QMetaEnum::QMetaEnum() \internal */ /*! Returns the name of the enumerator (without the scope). For example, the Qt::AlignmentFlag enumeration has \c AlignmentFlag as the name and \l Qt as the scope. \sa isValid(), scope() */ const char *QMetaEnum::name() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle]; } /*! Returns the number of keys. \sa key() */ int QMetaEnum::keyCount() const { if (!mobj) return 0; return mobj->d.data[handle + 2]; } /*! Returns the key with the given \a index, or 0 if no such key exists. \sa keyCount(), value(), valueToKey() */ const char *QMetaEnum::key(int index) const { if (!mobj) return 0; int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; if (index >= 0 && index < count) return mobj->d.stringdata + mobj->d.data[data + 2*index]; return 0; } /*! Returns the value with the given \a index; or returns -1 if there is no such value. \sa keyCount(), key(), keyToValue() */ int QMetaEnum::value(int index) const { if (!mobj) return 0; int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; if (index >= 0 && index < count) return mobj->d.data[data + 2*index + 1]; return -1; } /*! Returns true if this enumerator is used as a flag; otherwise returns false. When used as flags, enumerators can be combined using the OR operator. \sa keysToValue(), valueToKeys() */ bool QMetaEnum::isFlag() const { return mobj && mobj->d.data[handle + 1]; } /*! Returns the scope this enumerator was declared in. For example, the Qt::AlignmentFlag enumeration has \c Qt as the scope and \c AlignmentFlag as the name. \sa name() */ const char *QMetaEnum::scope() const { return mobj?mobj->d.stringdata : 0; } /*! Returns the integer value of the given enumeration \a key, or -1 if \a key is not defined. For flag types, use keysToValue(). \sa valueToKey(), isFlag(), keysToValue() */ int QMetaEnum::keyToValue(const char *key) const { if (!mobj || !key) return -1; uint scope = 0; const char *qualified_key = key; const char *s = key + qstrlen(key); while (s > key && *s != ':') --s; if (s > key && *(s-1)==':') { scope = s - key - 1; key += scope + 2; } int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; for (int i = 0; i < count; ++i) if ((!scope || (qstrlen(mobj->d.stringdata) == scope && strncmp(qualified_key, mobj->d.stringdata, scope) == 0)) && strcmp(key, mobj->d.stringdata + mobj->d.data[data + 2*i]) == 0) return mobj->d.data[data + 2*i + 1]; return -1; } /*! Returns the string that is used as the name of the given enumeration \a value, or 0 if \a value is not defined. For flag types, use valueToKeys(). \sa isFlag(), valueToKeys() */ const char* QMetaEnum::valueToKey(int value) const { if (!mobj) return 0; int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; for (int i = 0; i < count; ++i) if (value == (int)mobj->d.data[data + 2*i + 1]) return mobj->d.stringdata + mobj->d.data[data + 2*i]; return 0; } /*! Returns the value derived from combining together the values of the \a keys using the OR operator, or -1 if \a keys is not defined. Note that the strings in \a keys must be '|'-separated. \sa isFlag(), valueToKey(), valueToKeys() */ int QMetaEnum::keysToValue(const char *keys) const { if (!mobj) return -1; QStringList l = QString::fromLatin1(keys).split(QLatin1Char('|')); //#### TODO write proper code, do not use QStringList int value = 0; int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; for (int li = 0; li < l.size(); ++li) { QString trimmed = l.at(li).trimmed(); QByteArray qualified_key = trimmed.toLatin1(); const char *key = qualified_key.constData(); uint scope = 0; const char *s = key + qstrlen(key); while (s > key && *s != ':') --s; if (s > key && *(s-1)==':') { scope = s - key - 1; key += scope + 2; } int i; for (i = count-1; i >= 0; --i) if ((!scope || (qstrlen(mobj->d.stringdata) == scope && strncmp(qualified_key.constData(), mobj->d.stringdata, scope) == 0)) && strcmp(key, mobj->d.stringdata + mobj->d.data[data + 2*i]) == 0) { value |= mobj->d.data[data + 2*i + 1]; break; } if (i < 0) value |= -1; } return value; } /*! Returns a byte array of '|'-separated keys that represents the given \a value. \sa isFlag(), valueToKey(), keysToValue() */ QByteArray QMetaEnum::valueToKeys(int value) const { QByteArray keys; if (!mobj) return keys; int count = mobj->d.data[handle + 2]; int data = mobj->d.data[handle + 3]; int v = value; for(int i = 0; i < count; i++) { int k = mobj->d.data[data + 2*i + 1]; if ((k != 0 && (v & k) == k ) || (k == value)) { v = v & ~k; if (!keys.isEmpty()) keys += '|'; keys += mobj->d.stringdata + mobj->d.data[data + 2*i]; } } return keys; } /*! \class QMetaProperty \brief The QMetaProperty class provides meta-data about a property. \ingroup objectmodel A property has a name() and a type(), as well as various attributes that specify its behavior: isReadable(), isWritable(), isDesignable(), isScriptable(), and isStored(). If the property is an enumeration, isEnumType() returns true; if the property is an enumeration that is also a flag (i.e. its values can be combined using the OR operator), isEnumType() and isFlagType() both return true. The enumerator for these types is available from enumerator(). The property's values are set and retrieved with read(), write(), and reset(); they can also be changed through QObject's set and get functions. See QObject::setProperty() and QObject::property() for details. You get property meta-data through an object's meta-object. See QMetaObject::property() and QMetaObject::propertyCount() for details. \sa QMetaObject, QMetaEnum, QMetaMethod, {Qt's Property System} */ /*! \fn bool QMetaProperty::isValid() const Returns true if this property is valid (readable); otherwise returns false. \sa isReadable() */ /*! \internal */ QMetaProperty::QMetaProperty() : mobj(0), handle(0), idx(0) { } /*! Returns this property's name. \sa type(), typeName() */ const char *QMetaProperty::name() const { if (!mobj) return 0; int handle = priv(mobj->d.data)->propertyData + 3*idx; return mobj->d.stringdata + mobj->d.data[handle]; } /*! Returns the name of this property's type. \sa type(), name() */ const char *QMetaProperty::typeName() const { if (!mobj) return 0; int handle = priv(mobj->d.data)->propertyData + 3*idx; return mobj->d.stringdata + mobj->d.data[handle + 1]; } /*! Returns this property's type. The return value is one of the values of the QVariant::Type enumeration. \sa userType(), typeName(), name() */ QVariant::Type QMetaProperty::type() const { if (!mobj) return QVariant::Invalid; int handle = priv(mobj->d.data)->propertyData + 3*idx; uint flags = mobj->d.data[handle + 2]; uint type = flags >> 24; if (type == 0xff) // special value for QVariant type = QVariant::LastType; if (type) return QVariant::Type(type); if (isEnumType()) return QVariant::Int; return QVariant::UserType; } /*! \since 4.2 Returns this property's user type. The return value is one of the values that are registered with QMetaType, or 0 if the type is not registered. \sa type(), QMetaType, typeName() */ int QMetaProperty::userType() const { QVariant::Type tp = type(); if (tp != QVariant::UserType) return tp; return QMetaType::type(typeName()); } /*! Returns true if the property's type is an enumeration value that is used as a flag; otherwise returns false. Flags can be combined using the OR operator. A flag type is implicitly also an enum type. \sa isEnumType(), enumerator(), QMetaEnum::isFlag() */ bool QMetaProperty::isFlagType() const { return isEnumType() && menum.isFlag(); } /*! Returns true if the property's type is an enumeration value; otherwise returns false. \sa enumerator(), isFlagType() */ bool QMetaProperty::isEnumType() const { if (!mobj) return false; int handle = priv(mobj->d.data)->propertyData + 3*idx; int flags = mobj->d.data[handle + 2]; return (flags & EnumOrFlag) && menum.name(); } /*! \internal Returns true if the property has a C++ setter function that follows Qt's standard "name" / "setName" pattern. Designer and uic query hasStdCppSet() in order to avoid expensive QObject::setProperty() calls. All properties in Qt [should] follow this pattern. */ bool QMetaProperty::hasStdCppSet() const { if (!mobj) return false; int handle = priv(mobj->d.data)->propertyData + 3*idx; int flags = mobj->d.data[handle + 2]; return (flags & StdCppSet); } /*! Returns the enumerator if this property's type is an enumerator type; otherwise the returned value is undefined. \sa isEnumType(), isFlagType() */ QMetaEnum QMetaProperty::enumerator() const { return menum; } /*! Reads the property's value from the given \a object. Returns the value if it was able to read it; otherwise returns an invalid variant. \sa write(), reset(), isReadable() */ QVariant QMetaProperty::read(const QObject *object) const { if (!object || !mobj) return QVariant(); uint t = QVariant::Int; if (!isEnumType()) { int handle = priv(mobj->d.data)->propertyData + 3*idx; uint flags = mobj->d.data[handle + 2]; const char *typeName = mobj->d.stringdata + mobj->d.data[handle + 1]; t = (flags >> 24); if (t == 0xff) // special value for QVariant t = QVariant::LastType; if (t == QVariant::Invalid) t = QMetaType::type(typeName); if (t == QVariant::Invalid) t = QVariant::nameToType(typeName); if (t == QVariant::Invalid || t == QVariant::UserType) { if (t == QVariant::Invalid) qWarning("QMetaProperty::read: Unable to handle unregistered datatype '%s' for property '%s::%s'", typeName, mobj->className(), name()); return QVariant(); } } QVariant value; void *argv[1]; if (t == QVariant::LastType) { argv[0] = &value; } else { value = QVariant(t, (void*)0); argv[0] = value.data(); } const_cast(object)->qt_metacall(QMetaObject::ReadProperty, idx + mobj->propertyOffset(), argv); if (t != QVariant::LastType && argv[0] != value.data()) return QVariant((QVariant::Type)t, argv[0]); return value; } /*! Writes \a value as the property's value to the given \a object. Returns true if the write succeeded; otherwise returns false. \sa read(), reset(), isWritable() */ bool QMetaProperty::write(QObject *object, const QVariant &value) const { if (!object || !isWritable()) return false; QVariant v = value; uint t = QVariant::Invalid; if (isEnumType()) { if (v.type() == QVariant::String #ifdef QT3_SUPPORT || v.type() == QVariant::CString #endif ) { if (isFlagType()) v = QVariant(menum.keysToValue(value.toByteArray())); else v = QVariant(menum.keyToValue(value.toByteArray())); } else if (v.type() != QVariant::Int && v.type() != QVariant::UInt) { return false; } v.convert(QVariant::Int); } else { int handle = priv(mobj->d.data)->propertyData + 3*idx; uint flags = mobj->d.data[handle + 2]; const char *typeName = mobj->d.stringdata + mobj->d.data[handle + 1]; t = flags >> 24; if (t == 0xff) // special value for QVariant t = QVariant::LastType; if (t == QVariant::Invalid) { const char *vtypeName = value.typeName(); if (vtypeName && strcmp(typeName, vtypeName) == 0) t = value.userType(); else t = QVariant::nameToType(typeName); } if (t == QVariant::Invalid) return false; if (t != QVariant::LastType && t != (uint)value.userType() && (t < QMetaType::User && !v.convert((QVariant::Type)t))) return false; } void *argv[1]; if (t == QVariant::LastType) argv[0] = &v; else argv[0] = v.data(); object->qt_metacall(QMetaObject::WriteProperty, idx + mobj->propertyOffset(), argv); return true; } /*! Resets the property for the given \a object with a reset method. Returns true if the reset worked; otherwise returns false. Reset methods are optional; only a few properties support them. \sa read(), write() */ bool QMetaProperty::reset(QObject *object) const { if (!object || !mobj || !isResettable()) return false; void *argv[] = { 0 }; object->qt_metacall(QMetaObject::ResetProperty, idx + mobj->propertyOffset(), argv); return true; } /*! Returns true if this property can be reset to a default value; otherwise returns false. \sa reset() */ bool QMetaProperty::isResettable() const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; return flags & Resettable; } /*! Returns true if this property is readable; otherwise returns false. \sa isWritable(), read(), isValid() */ bool QMetaProperty::isReadable() const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; return flags & Readable; } /*! Returns true if this property is writable; otherwise returns false. \sa isReadable(), write() */ bool QMetaProperty::isWritable() const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; return flags & Writable; } /*! Returns true if this property is designable for the given \a object; otherwise returns false. If no \a object is given, the function returns false if the \c{Q_PROPERTY()}'s \c DESIGNABLE attribute is false; otherwise returns true (if the attribute is true or is a function or expression). \sa isScriptable(), isStored() */ bool QMetaProperty::isDesignable(const QObject *object) const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; bool b = flags & Designable; if (object) { void *argv[] = { &b }; const_cast(object)->qt_metacall(QMetaObject::QueryPropertyDesignable, idx + mobj->propertyOffset(), argv); } return b; } /*! Returns true if the property is scriptable for the given \a object; otherwise returns false. If no \a object is given, the function returns false if the \c{Q_PROPERTY()}'s \c SCRIPTABLE attribute is false; otherwise returns true (if the attribute is true or is a function or expression). \sa isDesignable(), isStored() */ bool QMetaProperty::isScriptable(const QObject *object) const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; bool b = flags & Scriptable; if (object) { void *argv[] = { &b }; const_cast(object)->qt_metacall(QMetaObject::QueryPropertyScriptable, idx + mobj->propertyOffset(), argv); } return b; } /*! Returns true if the property is stored for \a object; otherwise returns false. If no \a object is given, the function returns false if the \c{Q_PROPERTY()}'s \c STORED attribute is false; otherwise returns true (if the attribute is true or is a function or expression). \sa isDesignable(), isScriptable() */ bool QMetaProperty::isStored(const QObject *object) const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; bool b = flags & Stored; if (object) { void *argv[] = { &b }; const_cast(object)->qt_metacall(QMetaObject::QueryPropertyStored, idx + mobj->propertyOffset(), argv); } return b; } /*! Returns true if this is the property that the user can editable for \a object; otherwise returns false. I.e. the text property is the user editable property of a QLineEdit. If no \a object is given, the function returns false if the \c{Q_PROPERTY()}'s \c USER attribute is false; otherwise returns true (if the attribute is true or is a function or expression). \sa QMetaObject::userProperty(), isDesignable(), isScriptable() */ bool QMetaProperty::isUser(const QObject *object) const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; bool b = flags & User; if (object) { void *argv[] = { &b }; const_cast(object)->qt_metacall(QMetaObject::QueryPropertyUser, idx + mobj->propertyOffset(), argv); } return b; } /*! \obsolete Returns true if the property is editable for the given \a object; otherwise returns false. If no \a object is given, the function returns false if the \c{Q_PROPERTY()}'s \c EDITABLE attribute is false; otherwise returns true (if the attribute is true or is a function or expression). \sa isDesignable(), isScriptable(), isStored() */ bool QMetaProperty::isEditable(const QObject *object) const { if (!mobj) return false; int flags = mobj->d.data[handle + 2]; bool b = flags & Editable; if (object) { void *argv[] = { &b }; const_cast(object)->qt_metacall(QMetaObject::QueryPropertyEditable, idx + mobj->propertyOffset(), argv); } return b; } /*! \class QMetaClassInfo \brief The QMetaClassInfo class provides additional information about a class. \ingroup objectmodel Class information items are simple \e{name}--\e{value} pairs that are specified using Q_CLASSINFO() in the source code. The information can be retrieved using name() and value(). For example: \code class MyClass { Q_OBJECT Q_CLASSINFO("author", "Sabrina Schweinsteiger") Q_CLASSINFO("url", "http://doc.moosesoft.co.uk/1.0/") public: ... }; \endcode This mechanism is free for you to use in your Qt applications. Qt doesn't use it for any of its classes. \sa QMetaObject */ /*! \fn QMetaClassInfo::QMetaClassInfo() \internal */ /*! Returns the name of this item. \sa value() */ const char *QMetaClassInfo::name() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle]; } /*! Returns the value of this item. \sa name() */ const char* QMetaClassInfo::value() const { if (!mobj) return 0; return mobj->d.stringdata + mobj->d.data[handle + 1]; } /*! \macro QGenericArgument Q_ARG(Type, const Type &value) \relates QMetaObject This macro takes a \a Type and a \a value of that type and returns a \l QGenericArgument object that can be passed to QMetaObject::invokeMethod(). \sa Q_RETURN_ARG() */ /*! \macro QGenericReturnArgument Q_RETURN_ARG(Type, Type &value) \relates QMetaObject This macro takes a \a Type and a non-const reference to a \a value of that type and returns a QGenericReturnArgument object that can be passed to QMetaObject::invokeMethod(). \sa Q_ARG() */ /*! \class QGenericArgument \brief The QGenericArgument class is an internal helper class for marshalling arguments. This class should never be used directly. Please use the \l Q_ARG() macro instead. \sa Q_ARG(), QMetaObject::invokeMethod(), QGenericReturnArgument */ /*! \fn QGenericArgument::QGenericArgument(const char *name, const void *data) Constructs a QGenericArgument object with the given \a name and \a data. */ /*! \fn QGenericArgument::data () const Returns the data set in the constructor. */ /*! \fn QGenericArgument::name () const Returns the name set in the constructor. */ /*! \class QGenericReturnArgument \brief The QGenericReturnArgument class is an internal helper class for marshalling arguments. This class should never be used directly. Please use the Q_RETURN_ARG() macro instead. \sa Q_RETURN_ARG(), QMetaObject::invokeMethod(), QGenericArgument */ /*! \fn QGenericReturnArgument::QGenericReturnArgument(const char *name, void *data) Constructs a QGenericReturnArgument object with the given \a name and \a data. */