widgetfactory.cpp

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/*
TRANSLATOR qdesigner_internal::WidgetFactory
*/

#include "widgetfactory_p.h"
#include "widgetdatabase_p.h"
#include "metadatabase_p.h"
#include "qlayout_widget_p.h"
#include "qdesigner_widget_p.h"
#include "qdesigner_tabwidget_p.h"
#include "qdesigner_toolbox_p.h"
#include "qdesigner_stackedbox_p.h"
#include "qdesigner_toolbar_p.h"
#include "qdesigner_menubar_p.h"
#include "qdesigner_menu_p.h"
#include "qdesigner_dockwidget_p.h"
#include "qdesigner_utils_p.h"
#include "abstractformwindow.h"

// shared
#include "layoutinfo_p.h"
#include "spacer_widget_p.h"
#include "layout_p.h"

// sdk
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerContainerExtension>
#include <QtDesigner/QDesignerCustomWidgetInterface>
#include <QtDesigner/QExtensionManager>
#include <QtDesigner/QDesignerPropertySheetExtension>
#include <QtDesigner/QDesignerLanguageExtension>

#include <QtGui/QtGui>
#include <QtCore/qdebug.h>

namespace qdesigner_internal {

QPointer<QWidget> *WidgetFactory::m_lastPassiveInteractor = new QPointer<QWidget>();
bool WidgetFactory::m_lastWasAPassiveInteractor = false;


WidgetFactory::WidgetFactory(QDesignerFormEditorInterface *core, QObject *parent)
    : QDesignerWidgetFactoryInterface(parent),
      m_core(core),
      m_formWindow(0)
{
}

WidgetFactory::~WidgetFactory()
{
}

QDesignerFormWindowInterface *WidgetFactory::currentFormWindow(QDesignerFormWindowInterface *fw)
{
    QDesignerFormWindowInterface *was = m_formWindow;
    m_formWindow = fw;
    return was;
}

void WidgetFactory::loadPlugins()
{
    m_customFactory.clear();

    QDesignerPluginManager *pluginManager = m_core->pluginManager();

    QList<QDesignerCustomWidgetInterface*> lst = pluginManager->registeredCustomWidgets();
    foreach (QDesignerCustomWidgetInterface *c, lst) {
        m_customFactory.insert(c->name(), c);
    }
}

// Convencience to create non-widget objects. Returns 0 if unknown
QObject* WidgetFactory::createObject(const QString &className, QObject* parent) const
{
    if (className == QLatin1String("QAction"))
        return new QAction(parent);
    return 0;
}

QWidget*  WidgetFactory::createCustomWidget(const QString &className, QWidget *parentWidget) const
{
    CustomWidgetFactoryMap::const_iterator it = m_customFactory.constFind(className);
    if (it == m_customFactory.constEnd())
        return 0;

    QDesignerCustomWidgetInterface *factory = it.value();
    QWidget *rc = factory->createWidget(parentWidget);
    // shouldn't happen
    if (!rc) {
        designerWarning(QObject::tr("The custom widget factory registered for widgets of class %1 returned 0.").arg(className));
        return 0;
    }

    // Since a language plugin may lie about its names, like Qt Jambi
    // does, return immediatly here...
    QDesignerLanguageExtension *lang =
        qt_extension<QDesignerLanguageExtension *>(m_core->extensionManager(), m_core);
    if (lang)
        return rc;

    // Check for mismatched class names which is hard to track.
    // Perform literal comparison first for QAxWidget, for which a meta object hack is in effect.
    const char *createdClassNameC = rc->metaObject()->className();
    const QByteArray classNameB = className.toUtf8();
    const char *classNameC = classNameB.constData();

    if (qstrcmp(createdClassNameC, classNameC) && !rc->inherits(classNameC))
        designerWarning(QObject::tr("A class name mismatch occurred when creating a widget using the custom widget factory registered for widgets of class %1."
                                  " It returned a widget of class %2.").arg(className).arg(QString::fromUtf8(createdClassNameC)));
    return rc;
}

QWidget *WidgetFactory::createWidget(const QString &widgetName, QWidget *parentWidget) const
{
    QDesignerFormWindowInterface *fw = m_formWindow;
    if (! fw)
        fw = QDesignerFormWindowInterface::findFormWindow(parentWidget);

    QWidget *w = createCustomWidget(widgetName, parentWidget);

    if (w) {
    } else if (widgetName == QLatin1String("Line")) {
        w = new Line(parentWidget);
    } else if (widgetName == QLatin1String("QDockWidget")) {
        w = new QDesignerDockWidget(parentWidget);
    } else if (widgetName == QLatin1String("QTabWidget")) {
        w = new QDesignerTabWidget(parentWidget);
    } else if (widgetName == QLatin1String("QStackedWidget")) {
        w = new QDesignerStackedWidget(parentWidget);
    } else if (widgetName == QLatin1String("QToolBox")) {
        w = new QDesignerToolBox(parentWidget);
    } else if (widgetName == QLatin1String("QToolBar")) {
        QToolBar *tb = new QToolBar(parentWidget);
        w = tb;
        ToolBarEventFilter::install(tb);
    } else if (widgetName == QLatin1String("QMenuBar")) {
        w = new QDesignerMenuBar(parentWidget);
    } else if (widgetName == QLatin1String("QMenu")) {
        w = new QDesignerMenu(parentWidget);
    } else if (widgetName == QLatin1String("Spacer")) {
        w = new Spacer(parentWidget);
    } else if (widgetName == QLatin1String("QDockWidget")) {
        w = new QDesignerDockWidget(parentWidget);
    } else if (widgetName == QLatin1String("QLayoutWidget")) {
        w = fw ? new QLayoutWidget(fw, parentWidget) : new QWidget(parentWidget);
    } else if (widgetName == QLatin1String("QDialog")) {
        if (fw) {
            w = new QDesignerDialog(fw, parentWidget);
        } else {
            w = new QDialog(parentWidget);
        }
    } else if (widgetName == QLatin1String("QWidget")) {
        if (fw && parentWidget &&
             (qobject_cast<QDesignerFormWindowInterface*>(parentWidget) || qt_extension<QDesignerContainerExtension*>(m_core->extensionManager(), parentWidget))) {
             w = new QDesignerWidget(fw, parentWidget);
        } else {
            w = new QWidget(parentWidget);
        }
    }

#define DECLARE_LAYOUT(L, C)
#define DECLARE_COMPAT_WIDGET(W, C) /*DECLARE_WIDGET(W, C)*/
#define DECLARE_WIDGET(W, C) else if (widgetName == QLatin1String(#W)) { Q_ASSERT(w == 0); w = new W(parentWidget); }
#define DECLARE_WIDGET_1(W, C) else if (widgetName == QLatin1String(#W)) { Q_ASSERT(w == 0); w = new W(0, parentWidget); }

#include "widgets.table"

#undef DECLARE_COMPAT_WIDGET
#undef DECLARE_LAYOUT
#undef DECLARE_WIDGET
#undef DECLARE_WIDGET_1

    if (w == 0) {
        const QLatin1String fallBackBaseClass("QWidget");
        QDesignerWidgetDataBaseInterface *db = core()->widgetDataBase();
        QDesignerWidgetDataBaseItemInterface *item = db->item(db->indexOfClassName(widgetName));
        if (item == 0) {
            // Emergency: Create, derived from QWidget
            QString includeFile = widgetName.toLower();
            includeFile +=  QLatin1String(".h");
            item = appendDerived(db,widgetName,tr("%1 Widget").arg(widgetName),fallBackBaseClass,
                                 includeFile, true, true);
            Q_ASSERT(item);
        }
        QString baseClass = item->extends();
        if (baseClass.isEmpty()) {
            // Currently happens in the case of Q3-Support widgets
            baseClass =fallBackBaseClass;
        }
        w = createWidget(baseClass, parentWidget);
        promoteWidget(core(),w,widgetName);
    }

    Q_ASSERT(w != 0);

    if (fw != 0)
        initialize(w);

    return w;
}

QString WidgetFactory::classNameOf(QDesignerFormEditorInterface *c, QObject* o)
{
    if (o == 0)
        return QString();

    // check promoted before designer special
    if (o->isWidgetType()) {
        const QString customClassName = promotedCustomClassName(c,qobject_cast<QWidget*>(o));
        if (!customClassName.isEmpty())
            return customClassName;