diff options
Diffstat (limited to 'src/corelib/kernel/qmetaobject.cpp')
| -rw-r--r-- | src/corelib/kernel/qmetaobject.cpp | 208 |
1 files changed, 188 insertions, 20 deletions
diff --git a/src/corelib/kernel/qmetaobject.cpp b/src/corelib/kernel/qmetaobject.cpp index b54cb0c344..3e2fb46143 100644 --- a/src/corelib/kernel/qmetaobject.cpp +++ b/src/corelib/kernel/qmetaobject.cpp @@ -1,6 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2014 Olivier Goffart <ogoffart@woboq.com> ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtCore module of the Qt Toolkit. @@ -2298,6 +2299,112 @@ bool QMetaMethod::invoke(QObject *object, */ /*! + \since 5.5 + + Invokes this method on a Q_GADGET. Returns \c true if the member could be invoked. + Returns \c false if there is no such member or the parameters did not match. + + The pointer \a gadget must point to an instance of the gadget class. + + The invocation is always synchronous. + + The return value of this method call is placed in \a + returnValue. 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 this method call. + + \warning this method will not test the validity of the arguments: \a gadget + must be an instance of the class of the QMetaObject of which this QMetaMethod + has been constructed with. The arguments must have the same type as the ones + expected by the method, else, the behavior is undefined. + + \sa Q_ARG(), Q_RETURN_ARG(), qRegisterMetaType(), QMetaObject::invokeMethod() +*/ +bool QMetaMethod::invokeOnGadget(void* gadget, QGenericReturnArgument returnValue, QGenericArgument val0, QGenericArgument val1, QGenericArgument val2, QGenericArgument val3, QGenericArgument val4, QGenericArgument val5, QGenericArgument val6, QGenericArgument val7, QGenericArgument val8, QGenericArgument val9) const +{ + if (!gadget || !mobj) + return false; + + // check return type + if (returnValue.data()) { + const char *retType = typeName(); + if (qstrcmp(returnValue.name(), retType) != 0) { + // normalize the return value as well + QByteArray normalized = QMetaObject::normalizedType(returnValue.name()); + if (qstrcmp(normalized.constData(), retType) != 0) { + // String comparison failed, try compare the metatype. + int t = returnType(); + if (t == QMetaType::UnknownType || t != QMetaType::type(normalized)) + return false; + } + } + } + + // check argument count (we don't allow invoking a method if given too few arguments) + const char *typeNames[] = { + returnValue.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) { + if (qstrlen(typeNames[paramCount]) <= 0) + break; + } + if (paramCount <= QMetaMethodPrivate::get(this)->parameterCount()) + return false; + + // invoke! + void *param[] = { + returnValue.data(), + val0.data(), + val1.data(), + val2.data(), + val3.data(), + val4.data(), + val5.data(), + val6.data(), + val7.data(), + val8.data(), + val9.data() + }; + int idx_relative = QMetaMethodPrivate::get(this)->ownMethodIndex(); + Q_ASSERT(QMetaObjectPrivate::get(mobj)->revision >= 6); + QObjectPrivate::StaticMetaCallFunction callFunction = mobj->d.static_metacall; + if (!callFunction) + return false; + callFunction(reinterpret_cast<QObject*>(gadget), QMetaObject::InvokeMetaMethod, idx_relative, param); + return true; +} + +/*! + \fn bool QMetaMethod::invokeOnGadget(void *gadget, + 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()) const + + \overload + \since 5.5 + + This overload invokes this method for a \a gadget and ignores return values. +*/ + +/*! \class QMetaEnum \inmodule QtCore \brief The QMetaEnum class provides meta-data about an enumerator. @@ -2713,9 +2820,8 @@ int QMetaProperty::userType() const if (isEnumType()) { type = QMetaType::type(qualifiedName(menum)); if (type == QMetaType::UnknownType) { - void *argv[] = { &type }; - mobj->static_metacall(QMetaObject::RegisterPropertyMetaType, idx, argv); - if (type == -1 || type == QMetaType::UnknownType) + type = registerPropertyType(); + if (type == QMetaType::UnknownType) return QVariant::Int; // Match behavior of QMetaType::type() } return type; @@ -2723,11 +2829,7 @@ int QMetaProperty::userType() const type = QMetaType::type(typeName()); if (type != QMetaType::UnknownType) return type; - void *argv[] = { &type }; - mobj->static_metacall(QMetaObject::RegisterPropertyMetaType, idx, argv); - if (type != -1) - return type; - return QMetaType::UnknownType; + return registerPropertyType(); } /*! @@ -2791,6 +2893,20 @@ bool QMetaProperty::hasStdCppSet() const } /*! + \internal + Executes metacall with QMetaObject::RegisterPropertyMetaType flag. + Returns id of registered type or QMetaType::UnknownType if a type + could not be registered for any reason. +*/ +int QMetaProperty::registerPropertyType() const +{ + int registerResult = -1; + void *argv[] = { ®isterResult }; + mobj->static_metacall(QMetaObject::RegisterPropertyMetaType, idx, argv); + return registerResult == -1 ? QMetaType::UnknownType : registerResult; +} + +/*! Returns the enumerator if this property's type is an enumerator type; otherwise the returned value is undefined. @@ -2835,15 +2951,11 @@ QVariant QMetaProperty::read(const QObject *object) const } if (t == QMetaType::UnknownType) { // Try to register the type and try again before reporting an error. - int registerResult = -1; - void *argv[] = { ®isterResult }; - QMetaObject::metacall(const_cast<QObject*>(object), QMetaObject::RegisterPropertyMetaType, - idx + mobj->propertyOffset(), argv); - if (registerResult == -1) { + t = registerPropertyType(); + if (t == QMetaType::UnknownType) { qWarning("QMetaProperty::read: Unable to handle unregistered datatype '%s' for property '%s::%s'", typeName, mobj->className(), name()); return QVariant(); } - t = registerResult; } } @@ -2861,8 +2973,12 @@ QVariant QMetaProperty::read(const QObject *object) const value = QVariant(t, (void*)0); argv[0] = value.data(); } - QMetaObject::metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty, - idx + mobj->propertyOffset(), argv); + if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall) { + mobj->d.static_metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty, idx, argv); + } else { + QMetaObject::metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty, + idx + mobj->propertyOffset(), argv); + } if (status != -1) return value; @@ -2911,9 +3027,11 @@ bool QMetaProperty::write(QObject *object, const QVariant &value) const else { typeName = rawStringData(mobj, typeInfo & TypeNameIndexMask); t = QMetaType::type(typeName); + if (t == QMetaType::UnknownType) + t = registerPropertyType(); + if (t == QMetaType::UnknownType) + return false; } - if (t == QMetaType::UnknownType) - return false; if (t != QMetaType::QVariant && t != (uint)value.userType() && (t < QMetaType::User && !v.convert((QVariant::Type)t))) return false; } @@ -2932,7 +3050,11 @@ bool QMetaProperty::write(QObject *object, const QVariant &value) const argv[0] = &v; else argv[0] = v.data(); - QMetaObject::metacall(object, QMetaObject::WriteProperty, idx + mobj->propertyOffset(), argv); + if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall) + mobj->d.static_metacall(object, QMetaObject::WriteProperty, idx, argv); + else + QMetaObject::metacall(object, QMetaObject::WriteProperty, idx + mobj->propertyOffset(), argv); + return status; } @@ -2949,9 +3071,55 @@ bool QMetaProperty::reset(QObject *object) const if (!object || !mobj || !isResettable()) return false; void *argv[] = { 0 }; - QMetaObject::metacall(object, QMetaObject::ResetProperty, idx + mobj->propertyOffset(), argv); + if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall) + mobj->d.static_metacall(object, QMetaObject::ResetProperty, idx, argv); + else + QMetaObject::metacall(object, QMetaObject::ResetProperty, idx + mobj->propertyOffset(), argv); return true; } +/*! + \since 5.5 + + Reads the property's value from the given \a gadget. Returns the value + if it was able to read it; otherwise returns an invalid variant. + + This function should only be used if this is a property of a Q_GADGET +*/ +QVariant QMetaProperty::readOnGadget(const void *gadget) const +{ + Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall); + return read(reinterpret_cast<const QObject*>(gadget)); +} + +/*! + \since 5.5 + + Writes \a value as the property's value to the given \a gadget. Returns + true if the write succeeded; otherwise returns \c false. + + This function should only be used if this is a property of a Q_GADGET +*/ +bool QMetaProperty::writeOnGadget(void *gadget, const QVariant &value) const +{ + Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall); + return write(reinterpret_cast<QObject*>(gadget), value); +} + +/*! + \since 5.5 + + Resets the property for the given \a gadget with a reset method. + Returns \c true if the reset worked; otherwise returns \c false. + + Reset methods are optional; only a few properties support them. + + This function should only be used if this is a property of a Q_GADGET +*/ +bool QMetaProperty::resetOnGadget(void *gadget) const +{ + Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall); + return reset(reinterpret_cast<QObject*>(gadget)); +} /*! Returns \c true if this property can be reset to a default value; otherwise |