Long live Qt 4.5!

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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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of Qt Designer.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+
+#ifndef WIDGETFACTORY_H
+#define WIDGETFACTORY_H
+
+#include "shared_global_p.h"
+#include "pluginmanager_p.h"
+
+#include <QtDesigner/QDesignerWidgetFactoryInterface>
+
+#include <QtCore/QMap>
+#include <QtCore/QHash>
+#include <QtCore/QVariant>
+#include <QtCore/QPointer>
+
+QT_BEGIN_NAMESPACE
+
+class QObject;
+class QWidget;
+class QLayout;
+class QDesignerFormEditorInterface;
+class QDesignerCustomWidgetInterface;
+class QDesignerFormWindowInterface;
+class QStyle;
+
+namespace qdesigner_internal {
+
+class QDESIGNER_SHARED_EXPORT WidgetFactory: public QDesignerWidgetFactoryInterface
+{
+    Q_OBJECT
+public:
+    explicit WidgetFactory(QDesignerFormEditorInterface *core, QObject *parent = 0);
+    ~WidgetFactory();
+
+    virtual QWidget* containerOfWidget(QWidget *widget) const;
+    virtual QWidget* widgetOfContainer(QWidget *widget) const;
+
+    QObject* createObject(const QString &className, QObject* parent) const;
+
+    virtual QWidget *createWidget(const QString &className, QWidget *parentWidget) const;
+    virtual QLayout *createLayout(QWidget *widget, QLayout *layout, int type) const;
+
+    virtual bool isPassiveInteractor(QWidget *widget);
+    virtual void initialize(QObject *object) const;
+    void initializeCommon(QWidget *object) const;
+    void initializePreview(QWidget *object) const;
+
+
+    virtual QDesignerFormEditorInterface *core() const;
+
+    static QString classNameOf(QDesignerFormEditorInterface *core, const QObject* o);
+
+    QDesignerFormWindowInterface *currentFormWindow(QDesignerFormWindowInterface *fw);
+
+    static QLayout *createUnmanagedLayout(QWidget *parentWidget, int type);
+
+    // The widget factory maintains a cache of styles which it owns.
+    QString styleName() const;
+    void setStyleName(const QString &styleName);
+
+    /* Return a cached style matching the name or QApplication's style if
+     * it is the default. */
+    QStyle *getStyle(const QString &styleName);
+    // Return the current style used by the factory. This either a cached one
+    // or QApplication's style */
+    QStyle *style() const;
+
+    // Apply one of the cached styles or QApplication's style to a toplevel widget.
+    void applyStyleTopLevel(const QString &styleName, QWidget *w);
+    static void applyStyleToTopLevel(QStyle *style, QWidget *widget);
+
+    // Return whether object was created by the factory for the form editor.
+    static bool isFormEditorObject(const QObject *o);
+
+    // Boolean dynamic property to set on widgets to prevent custom
+    // styles from interfering
+    static const char *disableStyleCustomPaintingPropertyC;
+
+public slots:
+    void loadPlugins();
+
+private slots:
+    void activeFormWindowChanged(QDesignerFormWindowInterface *formWindow);
+    void formWindowAdded(QDesignerFormWindowInterface *formWindow);
+
+private:
+    struct Strings { // Reduce string allocations by storing predefined strings
+        Strings();
+        const QString m_alignment;
+        const QString m_bottomMargin;
+        const QString m_geometry;
+        const QString m_leftMargin;
+        const QString m_line;
+        const QString m_objectName;
+        const QString m_spacerName;
+        const QString m_orientation;
+        const QString m_q3WidgetStack;
+        const QString m_qAction;
+        const QString m_qButtonGroup;
+        const QString m_qAxWidget;
+        const QString m_qDialog;
+        const QString m_qDockWidget;
+        const QString m_qLayoutWidget;
+        const QString m_qMenu;
+        const QString m_qMenuBar;
+        const QString m_qWidget;
+        const QString m_rightMargin;
+        const QString m_sizeHint;
+        const QString m_spacer;
+        const QString m_text;
+        const QString m_title;
+        const QString m_topMargin;
+        const QString m_windowIcon;
+        const QString m_windowTitle;
+    };
+
+    QWidget* createCustomWidget(const QString &className, QWidget *parentWidget, bool *creationError) const;
+    QDesignerFormWindowInterface *findFormWindow(QWidget *parentWidget) const;
+    void setFormWindowStyle(QDesignerFormWindowInterface *formWindow);
+
+    const Strings m_strings;
+    QDesignerFormEditorInterface *m_core;
+    typedef QMap<QString, QDesignerCustomWidgetInterface*> CustomWidgetFactoryMap;
+    CustomWidgetFactoryMap m_customFactory;
+    QDesignerFormWindowInterface *m_formWindow;
+
+    // Points to the cached style or 0 if the default (qApp) is active
+    QStyle *m_currentStyle;
+    typedef QHash<QString, QStyle *> StyleCache;
+    StyleCache m_styleCache;
+
+    static QPointer<QWidget> *m_lastPassiveInteractor;
+    static bool m_lastWasAPassiveInteractor;
+};
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE
+
+#endif // WIDGETFACTORY_H