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qt_demoe/designer/lib/shared/morphmenu.cpp

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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@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
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