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# multipagewidgetplugin.cpp Example File
designer/containerextension/multipagewidgetplugin.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** 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 <QtDesigner/QExtensionFactory>
    #include <QtDesigner/QExtensionManager>
    #include <QtDesigner/QDesignerFormEditorInterface>
    #include <QtDesigner/QDesignerFormWindowInterface>
    #include <QtDesigner/QDesignerContainerExtension>
    #include <QtDesigner/QDesignerPropertySheetExtension>

    #include <QIcon>
    #include <QtPlugin>

    #include "multipagewidget.h"
    #include "multipagewidgetplugin.h"
    #include "multipagewidgetextensionfactory.h"

    MultiPageWidgetPlugin::MultiPageWidgetPlugin(QObject *parent)
        :QObject(parent)
    {
        initialized = false;
    }

    QString MultiPageWidgetPlugin::name() const
    {
        return QString("MultiPageWidget");
    }

    QString MultiPageWidgetPlugin::group() const
    {
        return QString("Display Widgets [Examples]");
    }

    QString MultiPageWidgetPlugin::toolTip() const
    {
        return "";
    }

    QString MultiPageWidgetPlugin::whatsThis() const
    {
        return "";
    }

    QString MultiPageWidgetPlugin::includeFile() const
    {
        return QString("multipagewidget.h");
    }

    QIcon MultiPageWidgetPlugin::icon() const
    {
        return QIcon();
    }

    bool MultiPageWidgetPlugin::isContainer() const
    {
        return true;
    }

    QWidget *MultiPageWidgetPlugin::createWidget(QWidget *parent)
    {
        MultiPageWidget *widget = new MultiPageWidget(parent);
        connect(widget, SIGNAL(currentIndexChanged(int)),
                this, SLOT(currentIndexChanged(int)));
        connect(widget, SIGNAL(pageTitleChanged(const QString &)),
                this, SLOT(pageTitleChanged(const QString &)));
        return widget;
    }

    bool MultiPageWidgetPlugin::isInitialized() const
    {
        return initialized;
    }

    void MultiPageWidgetPlugin::initialize(QDesignerFormEditorInterface *formEditor)
    {
        if (initialized)
            return;

        QExtensionManager *manager = formEditor->extensionManager();
        QExtensionFactory *factory = new MultiPageWidgetExtensionFactory(manager);

        Q_ASSERT(manager != 0);
        manager->registerExtensions(factory, Q_TYPEID(QDesignerContainerExtension));

        initialized = true;
    }

    QString MultiPageWidgetPlugin::domXml() const
    {
        return QString("\
        <widget class=\"MultiPageWidget\" name=\"multipagewidget\">\
            <widget class=\"QWidget\" name=\"page\" />\
        </widget>\
        ");
    }

    void MultiPageWidgetPlugin::currentIndexChanged(int index)
    {
        MultiPageWidget *widget = qobject_cast<MultiPageWidget*>(sender());
        if (widget) {
            QDesignerFormWindowInterface *form;
            form = QDesignerFormWindowInterface::findFormWindow(widget);
            if (form)
                form->emitSelectionChanged();
        }
    }

    void MultiPageWidgetPlugin::pageTitleChanged(const QString &title)
    {
        MultiPageWidget *widget = qobject_cast<MultiPageWidget*>(sender());
        if (widget) {
            QWidget *page = widget->widget(widget->currentIndex());
            QDesignerFormWindowInterface *form;
            form = QDesignerFormWindowInterface::findFormWindow(widget);
            if (form) {
                QDesignerFormEditorInterface *editor = form->core();
                QExtensionManager *manager = editor->extensionManager();
                QDesignerPropertySheetExtension *sheet;
                sheet = qt_extension<QDesignerPropertySheetExtension*>(manager, page);
                int propertyIndex = sheet->indexOf(QLatin1String("windowTitle"));
                sheet->setChanged(propertyIndex, true);
            }
        }
    }

    Q_EXPORT_PLUGIN2(containerextension, MultiPageWidgetPlugin)