/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Nokia Corporation (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 http://qt.nokia.com/contact. ** $QT_END_LICENSE$ ** ****************************************************************************/ #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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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(w)) return MorphItemView; if (qobject_cast(w)) return MorphButton; if (qobject_cast(w)) return MorphSpinBox; if (qobject_cast(w) || qobject_cast(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 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(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 LabelList; const LabelList labelList = qFindChildren(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(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(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(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(core->extensionManager(), widget); QDesignerPropertySheetExtension *afterSheet = qt_extension(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(*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(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