/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:FDL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Free Documentation License ** Alternatively, this file may be used under the terms of the GNU Free ** Documentation License version 1.3 as published by the Free Software ** Foundation and appearing in the file included in the packaging of this ** file. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \class QDesignerMemberSheetExtension \brief The QDesignerMemberSheetExtension class allows you to manipulate a widget's member functions which is displayed when configuring connections using Qt Designer's mode for editing signals and slots. \inmodule QtDesigner QDesignerMemberSheetExtension is a collection of functions that is typically used to query a widget's member functions, and to manipulate the member functions' appearance in \QD's signals and slots editing mode. For example: \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 2 When implementing a custom widget plugin, a pointer to \QD's current QDesignerFormEditorInterface object (\c formEditor in the example above) is provided by the QDesignerCustomWidgetInterface::initialize() function's parameter. The member sheet (and any other extension), can be retrieved by querying \QD's extension manager using the qt_extension() function. When you want to release the extension, you only need to delete the pointer. All widgets have a default member sheet used in \QD's signals and slots editing mode with the widget's member functions. But QDesignerMemberSheetExtension also provides an interface for creating custom member sheet extensions. \warning \QD uses the QDesignerMemberSheetExtension to facilitate the signal and slot editing mode. Whenever a connection between two widgets is requested, \QD will query for the widgets' member sheet extensions. If a widget has an implemented member sheet extension, this extension will override the default member sheet. To create a member sheet extension, your extension class must inherit from both QObject and QDesignerMemberSheetExtension. Then, since we are implementing an interface, we must ensure that it's made known to the meta object system using the Q_INTERFACES() macro: \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 3 This enables \QD to use qobject_cast() to query for supported interfaces using nothing but a QObject pointer. In \QD the extensions are not created until they are required. For that reason, when implementing a member sheet extension, you must also create a QExtensionFactory, i.e a class that is able to make an instance of your extension, and register it using \QD's \l {QExtensionManager}{extension manager}. When a widget's member sheet extension is required, \QD's \l {QExtensionManager}{extension manager} will run through all its registered factories calling QExtensionFactory::createExtension() for each until the first one that is able to create a member sheet extension for that widget, is found. This factory will then make an instance of the extension. If no such factory is found, \QD will use the default member sheet. There are four available types of extensions in \QD: QDesignerContainerExtension, QDesignerMemberSheetExtension, QDesignerPropertySheetExtension and QDesignerTaskMenuExtension. \QD's behavior is the same whether the requested extension is associated with a multi page container, a member sheet, a property sheet or a task menu. The QExtensionFactory class provides a standard extension factory, and can also be used as an interface for custom extension factories. You can either create a new QExtensionFactory and reimplement the QExtensionFactory::createExtension() function. For example: \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 4 Or you can use an existing factory, expanding the QExtensionFactory::createExtension() function to make the factory able to create a member sheet extension as well. For example: \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 5 For a complete example using an extension class, see \l {designer/taskmenuextension}{Task Menu Extension example}. The example shows how to create a custom widget plugin for Qt Designer, and how to to use the QDesignerTaskMenuExtension class to add custom items to \QD's task menu. \sa QExtensionFactory, QExtensionManager, {Creating Custom Widget Extensions} */ /*! \fn QDesignerMemberSheetExtension::~QDesignerMemberSheetExtension() Destroys the member sheet extension. */ /*! \fn int QDesignerMemberSheetExtension::count() const Returns the extension's number of member functions. */ /*! \fn int QDesignerMemberSheetExtension::indexOf(const QString &name) const Returns the index of the member function specified by the given \a name. \sa memberName() */ /*! \fn QString QDesignerMemberSheetExtension::memberName(int index) const Returns the name of the member function with the given \a index. \sa indexOf() */ /*! \fn QString QDesignerMemberSheetExtension::memberGroup(int index) const Returns the name of the member group specified for the function with the given \a index. \sa indexOf(), setMemberGroup() */ /*! \fn void QDesignerMemberSheetExtension::setMemberGroup(int index, const QString &group) Sets the member group of the member function with the given \a index, to \a group. \sa indexOf(), memberGroup() */ /*! \fn bool QDesignerMemberSheetExtension::isVisible(int index) const Returns true if the member function with the given \a index is visible in \QD's signal and slot editor, otherwise false. \sa indexOf(), setVisible() */ /*! \fn void QDesignerMemberSheetExtension::setVisible(int index, bool visible) If \a visible is true, the member function with the given \a index is visible in \QD's signals and slots editing mode; otherwise the member function is hidden. \sa indexOf(), isVisible() */ /*! \fn virtual bool QDesignerMemberSheetExtension::isSignal(int index) const Returns true if the member function with the given \a index is a signal, otherwise false. \sa indexOf() */ /*! \fn bool QDesignerMemberSheetExtension::isSlot(int index) const Returns true if the member function with the given \a index is a slot, otherwise false. \sa indexOf() */ /*! \fn bool QDesignerMemberSheetExtension::inheritedFromWidget(int index) const Returns true if the member function with the given \a index is inherited from QWidget, otherwise false. \sa indexOf() */ /*! \fn QString QDesignerMemberSheetExtension::declaredInClass(int index) const Returns the name of the class in which the member function with the given \a index is declared. \sa indexOf() */ /*! \fn QString QDesignerMemberSheetExtension::signature(int index) const Returns the signature of the member function with the given \a index. \sa indexOf() */ /*! \fn QList QDesignerMemberSheetExtension::parameterTypes(int index) const Returns the parameter types of the member function with the given \a index, as a QByteArray list. \sa indexOf(), parameterNames() */ /*! \fn QList QDesignerMemberSheetExtension::parameterNames(int index) const Returns the parameter names of the member function with the given \a index, as a QByteArray list. \sa indexOf(), parameterTypes() */