Long live Qt!

1 files changed, 635 insertions, 0 deletions

diff --git a/tools/designer/src/lib/shared/morphmenu.cpp b/tools/designer/src/lib/shared/morphmenu.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "morphmenu_p.h"
+#include "formwindowbase_p.h"
+#include "widgetfactory_p.h"
+#include "qdesigner_formwindowcommand_p.h"
+#include "qlayout_widget_p.h"
+#include "layoutinfo_p.h"
+#include "qdesigner_propertycommand_p.h"
+
+#include <QtDesigner/QExtensionManager>
+#include <QtDesigner/QDesignerContainerExtension>
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerLanguageExtension>
+#include <QtDesigner/QDesignerWidgetDataBaseInterface>
+#include <QtDesigner/QDesignerMetaDataBaseInterface>
+#include <QtDesigner/QDesignerPropertySheetExtension>
+
+#include <QtGui/QWidget>
+#include <QtGui/QAction>
+#include <QtGui/QMenu>
+#include <QtGui/QApplication>
+#include <QtGui/QLayout>
+#include <QtGui/QUndoStack>
+
+#include <QtGui/QFrame>
+#include <QtGui/QGroupBox>
+#include <QtGui/QTabWidget>
+#include <QtGui/QStackedWidget>
+#include <QtGui/QToolBox>
+#include <QtGui/QAbstractItemView>
+#include <QtGui/QAbstractButton>
+#include <QtGui/QAbstractSpinBox>
+#include <QtGui/QTextEdit>
+#include <QtGui/QPlainTextEdit>
+#include <QtGui/QLabel>
+
+#include <QtCore/QStringList>
+#include <QtCore/QMap>
+#include <QtCore/QVariant>
+#include <QtCore/QSignalMapper>
+#include <QtCore/QDebug>
+
+Q_DECLARE_METATYPE(QWidgetList)
+
+QT_BEGIN_NAMESPACE
+
+// Helpers for the dynamic properties that store Z/Widget order
+static const char *widgetOrderPropertyC = "_q_widgetOrder";
+static const char *zOrderPropertyC = "_q_zOrder";
+
+/* Morphing in Designer:
+ * It is possible to morph:
+ * - Non-Containers into similar widgets by category
+ * - Simple page containers into similar widgets or page-based containers with
+ *   a single page (in theory also into a QLayoutWidget, but this might
+ *   not always be appropriate).
+ * - Page-based containers into page-based containers or simple containers if
+ *   they have just one page
+ * [Page based containers meaning here having a container extension]
+ * Morphing types are restricted to the basic Qt types. Morphing custom
+ * widgets is considered risky since they might have unmanaged layouts
+ * or the like.
+ *
+ * Requirements:
+ * - The widget must be on a non-laid out parent or in a layout managed
+ *   by Designer
+ * - Its child widgets must be non-laid out or in a layout managed
+ *   by Designer
+ * Note that child widgets can be
+ * - On the widget itself in the case of simple containers
+ * - On several pages in the case of page-based containers
+ * This is what is called 'childContainers' in the code (the widget itself
+ * or the list of container extension pages).
+ *
+ * The Morphing process encompasses:
+ * - Create a target widget and apply properties as far as applicable
+ *   If the target widget has a container extension, add a sufficient
+ *   number of pages.
+ * - Transferring the child widgets over to the new childContainers.
+ *   In the case of a managed layout on a childContainer, this is simply
+ *   set on the target childContainer, which is a new Qt 4.5
+ *   functionality.
+ * - Replace the widget itself in the parent layout
+ */
+
+namespace qdesigner_internal {
+
+enum MorphCategory {
+    MorphCategoryNone, MorphSimpleContainer, MorphPageContainer, MorphItemView,
+    MorphButton, MorphSpinBox, MorphTextEdit
+};
+
+// Determine category of a widget
+static MorphCategory category(const QWidget *w)
+{
+    // Simple containers: Exact match
+    const QMetaObject *mo = w->metaObject();
+    if (mo == &QWidget::staticMetaObject || mo == &QFrame::staticMetaObject || mo == &QGroupBox::staticMetaObject || mo == &QLayoutWidget::staticMetaObject)
+        return MorphSimpleContainer;
+    if (mo == &QTabWidget::staticMetaObject || mo == &QStackedWidget::staticMetaObject || mo == &QToolBox::staticMetaObject)
+        return MorphPageContainer;
+    if (qobject_cast<const QAbstractItemView*>(w))
+        return MorphItemView;
+    if (qobject_cast<const QAbstractButton *>(w))
+        return MorphButton;
+    if (qobject_cast<const QAbstractSpinBox *>(w))
+        return MorphSpinBox;
+    if (qobject_cast<const QPlainTextEdit *>(w) || qobject_cast<const QTextEdit*>(w))
+        return MorphTextEdit;
+
+    return MorphCategoryNone;
+}
+
+/* Return the similar classes of a category. This is currently restricted
+ * to the known Qt classes with no precautions to parse the Widget Database
+ * (which is too risky, custom classes might have container extensions
+ * or non-managed layouts, etc.). */
+
+static QStringList classesOfCategory(MorphCategory cat)
+{
+    typedef QMap<MorphCategory, QStringList> CandidateCache;
+    static CandidateCache candidateCache;
+    CandidateCache::iterator it = candidateCache.find(cat);
+    if (it == candidateCache.end()) {
+        it = candidateCache.insert(cat, QStringList());
+        QStringList &l = it.value();
+        switch (cat) {
+        case MorphCategoryNone:
+            break;
+        case MorphSimpleContainer:
+            // Do not  generally allow to morph into a layout.
+            // This can be risky in case of container pages,etc.
+            l << QLatin1String("QWidget") << QLatin1String("QFrame") <<  QLatin1String("QGroupBox");
+            break;
+        case MorphPageContainer:
+            l << QLatin1String("QTabWidget") <<  QLatin1String("QStackedWidget") << QLatin1String("QToolBox");
+            break;
+        case MorphItemView:
+            l << QLatin1String("QListView") << QLatin1String("QListWidget")
+              << QLatin1String("QTreeView") << QLatin1String("QTreeWidget")
+              << QLatin1String("QTableView") << QLatin1String("QTableWidget")
+              << QLatin1String("QColumnView");
+            break;
+        case MorphButton:
+            l << QLatin1String("QCheckBox") << QLatin1String("QRadioButton")
+              << QLatin1String("QPushButton") << QLatin1String("QToolButton")
+              << QLatin1String("QCommandLinkButton");
+            break;
+        case MorphSpinBox:
+              l << QLatin1String("QDateTimeEdit") << QLatin1String("QDateEdit")
+                << QLatin1String("QTimeEdit")
+                << QLatin1String("QSpinBox") << QLatin1String("QDoubleSpinBox");
+            break;
+        case MorphTextEdit:
+             l << QLatin1String("QTextEdit") << QLatin1String("QPlainTextEdit");
+            break;
+        }
+    }
+    return it.value();
+}
+
+// Return the widgets containing the children to be transferred to. This is the
+// widget itself in most cases, except for QDesignerContainerExtension cases
+static QWidgetList childContainers(const QDesignerFormEditorInterface *core, QWidget *w)
+{
+    if (const QDesignerContainerExtension *ce = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), w)) {
+        QWidgetList children;
+        if (const int count = ce->count()) {
+            for (int i = 0; i < count; i++)
+                children.push_back(ce->widget(i));
+        }
+        return children;
+    }
+    QWidgetList self;
+    self.push_back(w);
+    return self;
+}
+
+// Suggest a suitable objectname for the widget to be morphed into
+// Replace the class name parts: 'xxFrame' -> 'xxGroupBox', 'frame' -> 'groupBox'
+static QString suggestObjectName(const QString &oldClassName, const QString &newClassName, const QString &oldName)
+{
+    QString oldClassPart = oldClassName;
+    QString newClassPart = newClassName;
+    if (oldClassPart.startsWith(QLatin1Char('Q')))
+        oldClassPart.remove(0, 1);
+    if (newClassPart.startsWith(QLatin1Char('Q')))
+        newClassPart.remove(0, 1);
+
+    QString newName = oldName;
+    newName.replace(oldClassPart, newClassPart);
+    oldClassPart[0] = oldClassPart.at(0).toLower();
+    newClassPart[0] = newClassPart.at(0).toLower();
+    newName.replace(oldClassPart, newClassPart);
+    return newName;
+}
+
+// Find the label whose buddy the widget is.
+QLabel *buddyLabelOf(QDesignerFormWindowInterface *fw, QWidget *w)
+{
+    typedef QList<QLabel*> LabelList;
+    const LabelList labelList = qFindChildren<QLabel*>(fw);
+    if (labelList.empty())
+        return 0;
+    const LabelList::const_iterator cend = labelList.constEnd();
+    for (LabelList::const_iterator it = labelList.constBegin(); it != cend; ++it )
+        if ( (*it)->buddy() == w)
+            return *it;
+    return 0;
+}
+
+// Replace widgets in a widget-list type dynamic property of the parent
+// used for Z-order, etc.
+static void replaceWidgetListDynamicProperty(QWidget *parentWidget,
+                                             QWidget *oldWidget, QWidget *newWidget,
+                                             const char *name)
+{
+    QWidgetList list = qVariantValue<QWidgetList>(parentWidget->property(name));
+    const int index = list.indexOf(oldWidget);
+    if (index != -1) {
+        list.replace(index, newWidget);
+         parentWidget->setProperty(name, qVariantFromValue(list));
+    }
+}
+
+/* Morph a widget into another class. Use the static addMorphMacro() to
+ * add a respective command sequence to the undo stack as it emits signals 
+ * which cause other commands to be added. */
+class MorphWidgetCommand : public QDesignerFormWindowCommand
+{
+    Q_DISABLE_COPY(MorphWidgetCommand)
+public:
+
+    explicit MorphWidgetCommand(QDesignerFormWindowInterface *formWindow);
+    ~MorphWidgetCommand();
+
+    // Convenience to add a morph command sequence macro
+    static bool addMorphMacro(QDesignerFormWindowInterface *formWindow, QWidget *w, const QString &newClass);
+
+    bool init(QWidget *widget, const QString &newClass);
+
+    QString newWidgetName() const { return m_afterWidget->objectName(); }
+
+    virtual void redo();
+    virtual void undo();
+
+    static QStringList candidateClasses(QDesignerFormWindowInterface *fw, QWidget *w);
+
+private:
+    static bool canMorph(QDesignerFormWindowInterface *fw, QWidget *w, int *childContainerCount = 0, MorphCategory *cat = 0);
+    void morph(QWidget *before, QWidget *after);
+
+    QWidget *m_beforeWidget;
+    QWidget *m_afterWidget;
+};
+
+bool MorphWidgetCommand::addMorphMacro(QDesignerFormWindowInterface *fw, QWidget *w, const QString &newClass)
+{
+    MorphWidgetCommand *morphCmd = new MorphWidgetCommand(fw);
+    if (!morphCmd->init(w, newClass)) {
+        qWarning("*** Unable to create a MorphWidgetCommand");
+        delete morphCmd;
+        return false;
+    }
+    QLabel *buddyLabel = buddyLabelOf(fw, w);
+    // Need a macro since it adds further commands
+    QUndoStack *us = fw->commandHistory();
+    us->beginMacro(morphCmd->text());
+    // Have the signal slot/buddy editors add their commands to delete widget
+    if (FormWindowBase *fwb = qobject_cast<FormWindowBase*>(fw))
+        fwb->emitWidgetRemoved(w);
+
+    const QString newWidgetName = morphCmd->newWidgetName();
+    us->push(morphCmd);
+
+    // restore buddy using the QByteArray name.
+    if (buddyLabel) {
+        SetPropertyCommand *buddyCmd = new SetPropertyCommand(fw);
+        buddyCmd->init(buddyLabel, QLatin1String("buddy"), QVariant(newWidgetName.toUtf8()));
+        us->push(buddyCmd);
+    }
+    us->endMacro();
+    return true;
+}
+
+MorphWidgetCommand::MorphWidgetCommand(QDesignerFormWindowInterface *formWindow)  :
+    QDesignerFormWindowCommand(QString(), formWindow),
+    m_beforeWidget(0),
+    m_afterWidget(0)
+{
+}
+
+MorphWidgetCommand::~MorphWidgetCommand()
+{
+}
+
+bool MorphWidgetCommand::init(QWidget *widget, const QString &newClassName)
+{
+    QDesignerFormWindowInterface *fw = formWindow();
+    QDesignerFormEditorInterface *core = fw->core();
+
+    if (!canMorph(fw, widget))
+        return false;
+
+    const QString oldClassName = WidgetFactory::classNameOf(core, widget);
+    const QString oldName = widget->objectName();
+    //: MorphWidgetCommand description
+    setText(QApplication::translate("Command", "Morph %1/'%2' into %3").arg(oldClassName, oldName, newClassName));
+
+    m_beforeWidget = widget;
+    m_afterWidget = core->widgetFactory()->createWidget(newClassName, fw);
+    if (!m_afterWidget)
+        return false;
+
+    // Set object name. Do not unique it (as to maintain it).
+    m_afterWidget->setObjectName(suggestObjectName(oldClassName, newClassName, oldName));
+
+    // If the target has a container extension, we add enough new pages to take
+    // up the children of the before widget
+    if (QDesignerContainerExtension* c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_afterWidget)) {
+        if (const int pageCount = childContainers(core, m_beforeWidget).size()) {
+            const QString qWidget = QLatin1String("QWidget");
+            const QString containerName = m_afterWidget->objectName();
+            for (int i = 0; i < pageCount; i++) {
+                QString name = containerName;
+                name += QLatin1String("Page");
+                name += QString::number(i + 1);
+                QWidget *page = core->widgetFactory()->createWidget(qWidget);
+                page->setObjectName(name);
+                fw->ensureUniqueObjectName(page);
+                c->addWidget(page);
+                core->metaDataBase()->add(page);
+            }
+        }
+    }
+
+    // Copy over applicable properties
+    const QDesignerPropertySheetExtension *beforeSheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), widget);
+    QDesignerPropertySheetExtension *afterSheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), m_afterWidget);
+    const QString objectNameProperty = QLatin1String("objectName");
+    const int count = beforeSheet->count();
+    for (int i = 0; i < count; i++)
+        if (beforeSheet->isVisible(i) && beforeSheet->isChanged(i)) {
+            const QString name = beforeSheet->propertyName(i);
+            if (name != objectNameProperty) {
+                const int afterIndex = afterSheet->indexOf(name);
+                if (afterIndex != -1 && afterSheet->isVisible(afterIndex) && afterSheet->propertyGroup(afterIndex) == beforeSheet->propertyGroup(i)) {
+                    afterSheet->setProperty(i, beforeSheet->property(i));
+                    afterSheet->setChanged(i, true);
+                } else {
+                    // Some mismatch. The rest won't match, either
+                    break;
+                }
+            }
+        }
+    return true;
+}
+
+void MorphWidgetCommand::redo()
+{
+    morph(m_beforeWidget, m_afterWidget);
+}
+
+void  MorphWidgetCommand::undo()
+{
+    morph(m_afterWidget, m_beforeWidget);
+}
+
+void MorphWidgetCommand::morph(QWidget *before, QWidget *after)
+{
+    QDesignerFormWindowInterface *fw = formWindow();
+
+    fw->unmanageWidget(before);
+
+    const QRect oldGeom = before->geometry();
+    QWidget *parent = before->parentWidget();
+    Q_ASSERT(parent);
+    /* Morphing consists of main 2 steps
+     * 1) Move over children (laid out, non-laid out)
+     * 2) Register self with new parent (laid out, non-laid out) */
+
+    // 1) Move children. Loop over child containers
+    QWidgetList beforeChildContainers = childContainers(fw->core(), before);
+    QWidgetList afterChildContainers = childContainers(fw->core(), after);
+    Q_ASSERT(beforeChildContainers.size() == afterChildContainers.size());
+    const int childContainerCount = beforeChildContainers.size();
+    for (int i = 0; i < childContainerCount; i++) {
+        QWidget *beforeChildContainer = beforeChildContainers.at(i);
+        QWidget *afterChildContainer = afterChildContainers.at(i);
+        if (QLayout *childLayout = beforeChildContainer->layout()) {
+            // Laid-out: Move the layout (since 4.5)
+            afterChildContainer->setLayout(childLayout);
+        } else {
+            // Non-Laid-out: Reparent, move over
+            const QObjectList c = beforeChildContainer->children();
+            const QObjectList::const_iterator cend = c.constEnd();
+            for (QObjectList::const_iterator it =  c.constBegin(); it != cend; ++it) {
+                if ( (*it)->isWidgetType()) {
+                    QWidget *w = static_cast<QWidget*>(*it);
+                    if (fw->isManaged(w)) {
+                        const QRect geom = w->geometry();
+                        w->setParent(afterChildContainer);
+                        w->setGeometry(geom);
+                    }
+                }
+            }
+        }
+        afterChildContainer->setProperty(widgetOrderPropertyC, beforeChildContainer->property(widgetOrderPropertyC));
+        afterChildContainer->setProperty(zOrderPropertyC, beforeChildContainer->property(zOrderPropertyC));
+    }
+
+    // 2) Replace the actual widget in the parent layout
+    after->setGeometry(oldGeom);
+    if (QLayout *containingLayout = LayoutInfo::managedLayout(fw->core(), parent)) {
+        LayoutHelper *lh = LayoutHelper::createLayoutHelper(LayoutInfo::layoutType(fw->core(), containingLayout));
+        Q_ASSERT(lh);
+        lh->replaceWidget(containingLayout, before, after);
+        delete lh;
+    } else {
+        before->hide();
+        before->setParent(0);
+        after->setParent(parent);
+        after->setGeometry(oldGeom);
+    }
+
+    // Check various properties: Z order, form tab order
+    replaceWidgetListDynamicProperty(parent, before, after, widgetOrderPropertyC);
+    replaceWidgetListDynamicProperty(parent, before, after, zOrderPropertyC);
+
+    QDesignerMetaDataBaseItemInterface *formItem = fw->core()->metaDataBase()->item(fw);
+    QWidgetList tabOrder = formItem->tabOrder();
+    const int tabIndex = tabOrder.indexOf(before);
+    if (tabIndex != -1) {
+        tabOrder.replace(tabIndex, after);
+        formItem->setTabOrder(tabOrder);
+    }
+
+    after->show();
+    fw->manageWidget(after);
+
+    fw->clearSelection(false);
+    fw->selectWidget(after);
+}
+
+/* Check if morphing is possible. It must be a valid category and the parent/
+ * child relationships must be either non-laidout or directly on
+ * Designer-managed layouts. */
+bool MorphWidgetCommand::canMorph(QDesignerFormWindowInterface *fw, QWidget *w, int *ptrToChildContainerCount, MorphCategory *ptrToCat)
+{
+    if (ptrToChildContainerCount)
+        *ptrToChildContainerCount = 0;
+    const MorphCategory cat = category(w);
+    if (ptrToCat)
+        *ptrToCat = cat;
+    if (cat == MorphCategoryNone)
+        return false;
+
+    QDesignerFormEditorInterface *core = fw->core();
+    // Don't know how to fiddle class names in Jambi..
+    if (qt_extension<QDesignerLanguageExtension *>(core->extensionManager(), core))
+        return false;
+    if (!fw->isManaged(w) || w == fw->mainContainer())
+        return false;
+    // Check the parent relationship. We accept only managed parent widgets
+    // with a single, managed layout in which widget is a member.
+    QWidget *parent = w->parentWidget();
+    if (parent == 0)
+        return false;
+    if (QLayout *pl = LayoutInfo::managedLayout(core, parent))
+        if (pl->indexOf(w) < 0 || !core->metaDataBase()->item(pl))
+            return false;
+    // Check Widget database
+    const QDesignerWidgetDataBaseInterface *wdb = core->widgetDataBase();
+    const int wdbindex = wdb->indexOfObject(w);
+    if (wdbindex == -1)
+        return false;
+    const bool isContainer = wdb->item(wdbindex)->isContainer();
+    if (!isContainer)
+        return true;
+    // Check children. All child containers must be non-laid-out or have managed layouts
+    const QWidgetList pages = childContainers(core, w);
+    const int pageCount = pages.size();
+    if (ptrToChildContainerCount)
+        *ptrToChildContainerCount = pageCount;
+    if (pageCount) {
+        for (int i = 0; i < pageCount; i++)
+            if (QLayout *cl = pages.at(i)->layout())
+                if (!core->metaDataBase()->item(cl))
+                    return false;
+    }
+    return true;
+}
+
+QStringList MorphWidgetCommand::candidateClasses(QDesignerFormWindowInterface *fw, QWidget *w)
+{
+    int childContainerCount;
+    MorphCategory cat;
+    if (!canMorph(fw, w, &childContainerCount, &cat))
+        return QStringList();
+
+    QStringList rc = classesOfCategory(cat);
+    switch (cat) {
+        // Frames, etc can always be morphed into one-page page containers
+    case MorphSimpleContainer:
+        rc += classesOfCategory(MorphPageContainer);
+        break;
+        // Multipage-Containers can be morphed into simple containers if they
+        // have 1 page.
+    case MorphPageContainer:
+        if (childContainerCount == 1)
+            rc += classesOfCategory(MorphSimpleContainer);
+        break;
+    default:
+        break;
+    }
+    return rc;
+}
+
+// MorphMenu
+MorphMenu::MorphMenu(QObject *parent) :
+    QObject(parent),
+    m_subMenuAction(0),
+    m_menu(0),
+    m_mapper(0),
+    m_widget(0),
+    m_formWindow(0)
+{
+}
+
+void MorphMenu::populate(QWidget *w, QDesignerFormWindowInterface *fw, ActionList& al)
+{
+    if (populateMenu(w, fw))
+        al.push_back(m_subMenuAction);
+}
+
+void MorphMenu::populate(QWidget *w, QDesignerFormWindowInterface *fw, QMenu& m)
+{
+    if (populateMenu(w, fw))
+        m.addAction(m_subMenuAction);
+}
+
+void MorphMenu::slotMorph(const QString &newClassName)
+{
+    MorphWidgetCommand::addMorphMacro(m_formWindow, m_widget, newClassName);
+}
+
+bool MorphMenu::populateMenu(QWidget *w, QDesignerFormWindowInterface *fw)
+{
+    m_widget = 0;
+    m_formWindow = 0;
+
+    // Clear menu
+    if (m_subMenuAction) {
+        m_subMenuAction->setVisible(false);
+        m_menu->clear();
+    }
+
+    // Checks: Must not be main container
+    if (w == fw->mainContainer())
+        return false;
+
+    const QStringList c = MorphWidgetCommand::candidateClasses(fw, w);
+    if (c.empty())
+        return false;
+
+    // Pull up
+    m_widget = w;
+    m_formWindow = fw;
+    const QString oldClassName = WidgetFactory::classNameOf(fw->core(), w);
+
+    if (!m_subMenuAction) {
+        m_subMenuAction = new QAction(tr("Morph into"), this);
+        m_menu = new QMenu;
+        m_subMenuAction->setMenu(m_menu);
+        m_mapper = new QSignalMapper(this);
+        connect(m_mapper , SIGNAL(mapped(QString)), this, SLOT(slotMorph(QString)));
+    }
+
+    // Add actions
+    const QStringList::const_iterator cend = c.constEnd();
+    for (QStringList::const_iterator it = c.constBegin(); it != cend; ++it) {
+        if (*it != oldClassName) {
+            QAction *a = m_menu->addAction(*it);
+            m_mapper->setMapping (a, *it);
+            connect(a, SIGNAL(triggered()), m_mapper, SLOT(map()));
+        }
+    }
+    m_subMenuAction->setVisible(true);
+    return true;
+}
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE