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diff --git a/src/gui/widgets/qdockwidget.h b/src/gui/widgets/qdockwidget.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDYNAMICDOCKWIDGET_H
+#define QDYNAMICDOCKWIDGET_H
+
+#include <QtGui/qwidget.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#ifndef QT_NO_DOCKWIDGET
+
+class QDockAreaLayout;
+class QDockWidgetPrivate;
+class QMainWindow;
+class QStyleOptionDockWidget;
+
+class Q_GUI_EXPORT QDockWidget : public QWidget
+{
+    Q_OBJECT
+
+    Q_FLAGS(DockWidgetFeatures)
+    Q_PROPERTY(bool floating READ isFloating WRITE setFloating)
+    Q_PROPERTY(DockWidgetFeatures features READ features WRITE setFeatures NOTIFY featuresChanged)
+    Q_PROPERTY(Qt::DockWidgetAreas allowedAreas READ allowedAreas
+               WRITE setAllowedAreas NOTIFY allowedAreasChanged)
+    Q_PROPERTY(QString windowTitle READ windowTitle WRITE setWindowTitle DESIGNABLE true)
+
+public:
+    explicit QDockWidget(const QString &title, QWidget *parent = 0, Qt::WindowFlags flags = 0);
+    explicit QDockWidget(QWidget *parent = 0, Qt::WindowFlags flags = 0);
+    ~QDockWidget();
+
+    QWidget *widget() const;
+    void setWidget(QWidget *widget);
+
+    enum DockWidgetFeature {
+        DockWidgetClosable    = 0x01,
+        DockWidgetMovable     = 0x02,
+        DockWidgetFloatable   = 0x04,
+        DockWidgetVerticalTitleBar = 0x08,
+
+        DockWidgetFeatureMask = 0x0f,
+        AllDockWidgetFeatures = DockWidgetClosable|DockWidgetMovable|DockWidgetFloatable, // ### remove in 5.0
+        NoDockWidgetFeatures  = 0x00,
+
+        Reserved              = 0xff
+    };
+    Q_DECLARE_FLAGS(DockWidgetFeatures, DockWidgetFeature)
+
+    void setFeatures(DockWidgetFeatures features);
+    DockWidgetFeatures features() const;
+
+    void setFloating(bool floating);
+    inline bool isFloating() const { return isWindow(); }
+
+    void setAllowedAreas(Qt::DockWidgetAreas areas);
+    Qt::DockWidgetAreas allowedAreas() const;
+
+    void setTitleBarWidget(QWidget *widget);
+    QWidget *titleBarWidget() const;
+
+    inline bool isAreaAllowed(Qt::DockWidgetArea area) const
+    { return (allowedAreas() & area) == area; }
+
+#ifndef QT_NO_ACTION
+    QAction *toggleViewAction() const;
+#endif
+
+Q_SIGNALS:
+    void featuresChanged(QDockWidget::DockWidgetFeatures features);
+    void topLevelChanged(bool topLevel);
+    void allowedAreasChanged(Qt::DockWidgetAreas allowedAreas);
+    void visibilityChanged(bool visible);
+    void dockLocationChanged(Qt::DockWidgetArea area);
+
+protected:
+    void changeEvent(QEvent *event);
+    void closeEvent(QCloseEvent *event);
+    void paintEvent(QPaintEvent *event);
+    bool event(QEvent *event);
+    void initStyleOption(QStyleOptionDockWidget *option) const;
+
+private:
+    Q_DECLARE_PRIVATE(QDockWidget)
+    Q_DISABLE_COPY(QDockWidget)
+    Q_PRIVATE_SLOT(d_func(), void _q_toggleView(bool))
+    Q_PRIVATE_SLOT(d_func(), void _q_toggleTopLevel())
+    friend class QDockAreaLayout;
+    friend class QDockWidgetItem;
+    friend class QMainWindowLayout;
+    friend class QDockWidgetLayout;
+    friend class QDockAreaLayoutInfo;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QDockWidget::DockWidgetFeatures)
+
+#endif // QT_NO_DOCKWIDGET
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QDYNAMICDOCKWIDGET_H