Long live Qt!

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diff --git a/tools/designer/src/lib/shared/promotiontaskmenu.cpp b/tools/designer/src/lib/shared/promotiontaskmenu.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 "promotiontaskmenu_p.h"
+#include "qdesigner_promotiondialog_p.h"
+#include "widgetfactory_p.h"
+#include "metadatabase_p.h"
+#include "widgetdatabase_p.h"
+#include "qdesigner_command_p.h"
+#include "signalslotdialog_p.h"
+#include "qdesigner_objectinspector_p.h"
+#include "abstractintrospection_p.h"
+
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerFormWindowCursorInterface>
+#include <QtDesigner/QDesignerLanguageExtension>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QExtensionManager>
+
+#include <QtGui/QAction>
+#include <QtGui/QWidget>
+#include <QtGui/QMenu>
+#include <QtCore/QSignalMapper>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+static QAction *separatorAction(QObject *parent)
+{
+    QAction *rc = new  QAction(parent);
+    rc->setSeparator(true);
+    return rc;
+}
+
+static inline QDesignerLanguageExtension *languageExtension(QDesignerFormEditorInterface *core)
+{
+    return qt_extension<QDesignerLanguageExtension*>(core->extensionManager(), core);
+}
+
+namespace qdesigner_internal {
+
+PromotionTaskMenu::PromotionTaskMenu(QWidget *widget,Mode mode, QObject *parent) :
+    QObject(parent),
+    m_mode(mode),
+    m_widget(widget),
+    m_promotionMapper(0),
+    m_globalEditAction(new QAction(tr("Promoted widgets..."), this)),
+    m_EditPromoteToAction(new QAction(tr("Promote to ..."), this)),
+    m_EditSignalsSlotsAction(new QAction(tr("Change signals/slots..."), this)),
+    m_promoteLabel(tr("Promote to")),
+    m_demoteLabel(tr("Demote to %1"))
+{
+    connect(m_globalEditAction, SIGNAL(triggered()), this, SLOT(slotEditPromotedWidgets()));
+    connect(m_EditPromoteToAction, SIGNAL(triggered()), this, SLOT(slotEditPromoteTo()));
+    connect(m_EditSignalsSlotsAction, SIGNAL(triggered()), this, SLOT(slotEditSignalsSlots()));
+}
+
+PromotionTaskMenu::Mode PromotionTaskMenu::mode() const
+{
+    return m_mode;
+}
+
+void PromotionTaskMenu::setMode(Mode m)
+{
+    m_mode = m;
+}
+
+void PromotionTaskMenu::setWidget(QWidget *widget)
+{
+    m_widget = widget;
+}
+
+void PromotionTaskMenu::setPromoteLabel(const QString &promoteLabel)
+{
+    m_promoteLabel = promoteLabel;
+}
+
+void PromotionTaskMenu::setEditPromoteToLabel(const QString &promoteEditLabel)
+{
+    m_EditPromoteToAction->setText(promoteEditLabel);
+}
+
+void PromotionTaskMenu::setDemoteLabel(const QString &demoteLabel)
+{
+    m_demoteLabel = demoteLabel;
+}
+
+PromotionTaskMenu::PromotionState  PromotionTaskMenu::createPromotionActions(QDesignerFormWindowInterface *formWindow)
+{
+    // clear out old
+    if (!m_promotionActions.empty()) {
+        qDeleteAll(m_promotionActions);
+        m_promotionActions.clear();
+    }
+    // No promotion of main container
+    if (formWindow->mainContainer() == m_widget)
+        return NotApplicable;
+
+    // Check for a homogenous selection
+    const PromotionSelectionList promotionSelection = promotionSelectionList(formWindow);
+
+    if (promotionSelection.empty())
+        return NoHomogenousSelection;
+
+    QDesignerFormEditorInterface *core = formWindow->core();
+    // if it is promoted: demote only.
+    if (isPromoted(formWindow->core(), m_widget)) {
+        const QString label = m_demoteLabel.arg( promotedExtends(core , m_widget));
+        QAction *demoteAction = new QAction(label, this);
+        connect(demoteAction, SIGNAL(triggered()), this, SLOT(slotDemoteFromCustomWidget()));
+        m_promotionActions.push_back(demoteAction);
+        return CanDemote;
+    }
+    // figure out candidates
+    const QString baseClassName = WidgetFactory::classNameOf(core,  m_widget);
+    const WidgetDataBaseItemList candidates = promotionCandidates(core->widgetDataBase(), baseClassName );
+    if (candidates.empty()) {
+        // Is this thing promotable at all?
+        return QDesignerPromotionDialog::baseClassNames(core->promotion()).contains(baseClassName) ?  CanPromote : NotApplicable;
+    }
+    // Set up a signal mapper to associate class names
+    if (!m_promotionMapper) {
+        m_promotionMapper = new QSignalMapper(this);
+        connect(m_promotionMapper, SIGNAL(mapped(QString)), this, SLOT(slotPromoteToCustomWidget(QString)));
+    }
+
+    QMenu *candidatesMenu = new QMenu();
+    // Create a sub menu
+    const WidgetDataBaseItemList::const_iterator cend = candidates.constEnd();
+    // Set up actions and map class names
+    for (WidgetDataBaseItemList::const_iterator it = candidates.constBegin(); it != cend; ++it) {
+        const QString customClassName = (*it)->name();
+        QAction *action = new QAction((*it)->name(), this);
+        connect(action, SIGNAL(triggered()), m_promotionMapper, SLOT(map()));
+        m_promotionMapper->setMapping(action, customClassName);
+        candidatesMenu->addAction(action);
+    }
+    // Sub menu action
+    QAction *subMenuAction = new QAction(m_promoteLabel, this);
+    subMenuAction->setMenu(candidatesMenu);
+    m_promotionActions.push_back(subMenuAction);
+    return CanPromote;
+}
+
+void PromotionTaskMenu::addActions(unsigned separatorFlags, ActionList &actionList)
+{
+    addActions(formWindow(), separatorFlags, actionList);
+}
+
+void PromotionTaskMenu::addActions(QDesignerFormWindowInterface *fw, unsigned flags,
+                                   ActionList &actionList)
+{
+    Q_ASSERT(m_widget);
+    const int previousSize = actionList.size();
+    const PromotionState promotionState = createPromotionActions(fw);
+
+    // Promotion candidates/demote
+    actionList += m_promotionActions;
+
+    // Edit action depending on context
+    switch (promotionState) {
+    case  CanPromote:
+        actionList += m_EditPromoteToAction;
+        break;
+    case CanDemote:
+        if (!(flags & SuppressGlobalEdit))
+            actionList += m_globalEditAction;
+        if (!languageExtension(fw->core())) {
+            actionList += separatorAction(this);
+            actionList += m_EditSignalsSlotsAction;
+        }
+        break;
+    default:
+        if (!(flags & SuppressGlobalEdit))
+            actionList += m_globalEditAction;
+        break;
+    }
+    // Add separators if required
+    if (actionList.size() > previousSize) {
+        if (flags &  LeadingSeparator)
+            actionList.insert(previousSize, separatorAction(this));
+        if (flags & TrailingSeparator)
+            actionList += separatorAction(this);
+    }
+}
+
+void  PromotionTaskMenu::addActions(QDesignerFormWindowInterface *fw, unsigned flags, QMenu *menu)
+{
+    ActionList actionList;
+    addActions(fw, flags, actionList);
+    menu->addActions(actionList);
+}
+
+void  PromotionTaskMenu::addActions(unsigned flags, QMenu *menu)
+{
+    addActions(formWindow(), flags, menu);
+}
+
+void PromotionTaskMenu::promoteTo(QDesignerFormWindowInterface *fw, const QString &customClassName)
+{
+    Q_ASSERT(m_widget);
+    PromoteToCustomWidgetCommand *cmd = new PromoteToCustomWidgetCommand(fw);
+    cmd->init(promotionSelectionList(fw), customClassName);
+    fw->commandHistory()->push(cmd);
+}
+
+
+void  PromotionTaskMenu::slotPromoteToCustomWidget(const QString &customClassName)
+{
+    promoteTo(formWindow(), customClassName);
+}
+
+void PromotionTaskMenu::slotDemoteFromCustomWidget()
+{
+    QDesignerFormWindowInterface *fw = formWindow();
+    const PromotionSelectionList promotedWidgets = promotionSelectionList(fw);
+    Q_ASSERT(!promotedWidgets.empty() && isPromoted(fw->core(), promotedWidgets.front()));
+
+    // ### use the undo stack
+    DemoteFromCustomWidgetCommand *cmd = new DemoteFromCustomWidgetCommand(fw);
+    cmd->init(promotedWidgets);
+    fw->commandHistory()->push(cmd);
+}
+
+void PromotionTaskMenu::slotEditPromoteTo()
+{
+    Q_ASSERT(m_widget);
+    // Check whether invoked over a promotable widget
+    QDesignerFormWindowInterface *fw = formWindow();
+    QDesignerFormEditorInterface *core = fw->core();
+    const QString base_class_name = WidgetFactory::classNameOf(core, m_widget);
+    Q_ASSERT(QDesignerPromotionDialog::baseClassNames(core->promotion()).contains(base_class_name));
+    // Show over promotable widget
+    QString promoteToClassName;
+    QDialog *promotionEditor = 0;
+    if (QDesignerLanguageExtension *lang = languageExtension(core))
+        promotionEditor = lang->createPromotionDialog(core, base_class_name, &promoteToClassName, fw);
+    if (!promotionEditor)
+        promotionEditor = new QDesignerPromotionDialog(core, fw, base_class_name, &promoteToClassName);
+    if (promotionEditor->exec() == QDialog::Accepted && !promoteToClassName.isEmpty()) {
+        promoteTo(fw, promoteToClassName);
+    }
+    delete promotionEditor;
+}
+
+void PromotionTaskMenu::slotEditPromotedWidgets()
+{
+    // Global context, show over non-promotable widget
+    QDesignerFormWindowInterface *fw = formWindow();
+    if (!fw)
+        return;
+    editPromotedWidgets(fw->core(), fw);
+}
+
+PromotionTaskMenu::PromotionSelectionList PromotionTaskMenu::promotionSelectionList(QDesignerFormWindowInterface *formWindow) const
+{
+    // In multi selection mode, check for a homogenous selection (same class, same promotion state)
+    // and return the list if this is the case. Also make sure m_widget
+    // is the last widget in the list so that it is re-selected as the last
+    // widget by the promotion commands.
+
+    PromotionSelectionList rc;
+
+    if (m_mode != ModeSingleWidget) {
+        QDesignerFormEditorInterface *core = formWindow->core();
+        const QDesignerIntrospectionInterface *intro = core->introspection();
+        const QString className = intro->metaObject(m_widget)->className();
+        const bool promoted = isPromoted(formWindow->core(), m_widget);
+        // Just in case someone plugged an old-style Object Inspector
+        if (QDesignerObjectInspector *designerObjectInspector = qobject_cast<QDesignerObjectInspector *>(core->objectInspector())) {
+            Selection s;
+            designerObjectInspector->getSelection(s);
+            // Find objects of similar state
+            const QWidgetList &source = m_mode == ModeManagedMultiSelection ? s.managed : s.unmanaged;
+            const QWidgetList::const_iterator cend = source.constEnd();
+            for (QWidgetList::const_iterator it = source.constBegin(); it != cend; ++it) {
+                QWidget *w = *it;
+                if (w != m_widget) {
+                    // Selection state mismatch
+                    if (intro->metaObject(w)->className() != className || isPromoted(core, w) !=  promoted)
+                        return PromotionSelectionList();
+                    rc.push_back(w);
+                }
+            }
+        }
+    }
+
+    rc.push_back(m_widget);
+    return rc;
+}
+
+QDesignerFormWindowInterface *PromotionTaskMenu::formWindow() const
+{
+    // Use the QObject overload of  QDesignerFormWindowInterface::findFormWindow since that works
+    // for QDesignerMenus also.
+    QObject *o = m_widget;
+    QDesignerFormWindowInterface *result = QDesignerFormWindowInterface::findFormWindow(o);
+    Q_ASSERT(result != 0);
+    return result;
+}
+
+void PromotionTaskMenu::editPromotedWidgets(QDesignerFormEditorInterface *core, QWidget* parent) {
+    QDesignerLanguageExtension *lang = languageExtension(core);
+    // Show over non-promotable widget
+    QDialog *promotionEditor =  0;
+    if (lang)
+        lang->createPromotionDialog(core, parent);
+    if (!promotionEditor)
+        promotionEditor = new QDesignerPromotionDialog(core, parent);
+    promotionEditor->exec();
+    delete promotionEditor;
+}
+
+void PromotionTaskMenu::slotEditSignalsSlots()
+{
+    QDesignerFormWindowInterface *fw = formWindow();
+    if (!fw)
+        return;
+    SignalSlotDialog::editPromotedClass(fw->core(), m_widget, fw);
+}
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE