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diff --git a/src/gui/kernel/qwindow.h b/src/gui/kernel/qwindow.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 QWINDOW_QPA_H
+#define QWINDOW_QPA_H
+
+#include <QtCore/QObject>
+#include <QtCore/QEvent>
+#include <QtCore/QMargins>
+#include <QtCore/QRect>
+
+#include <QtGui/qsurfaceformat.h>
+#include <QtGui/qwindowdefs.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QWindowPrivate;
+
+class QExposeEvent;
+class QResizeEvent;
+class QShowEvent;
+class QHideEvent;
+class QKeyEvent;
+class QInputMethodEvent;
+class QMouseEvent;
+#ifndef QT_NO_WHEELEVENT
+class QWheelEvent;
+#endif
+
+class QPlatformSurface;
+class QPlatformWindow;
+class QBackingStore;
+class QScreen;
+
+class Q_GUI_EXPORT QSurface
+{
+public:
+    enum SurfaceType {
+        Window
+    };
+
+    SurfaceType surfaceType() const { return m_type; }
+
+    virtual QSurfaceFormat format() const = 0;
+    virtual QPlatformSurface *surfaceHandle() const = 0;
+
+private:
+    QSurface(SurfaceType type) : m_type(type) {}
+
+    SurfaceType m_type;
+
+    friend class QWindow;
+};
+
+class Q_GUI_EXPORT QWindow : public QObject, public QSurface
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QWindow)
+
+    Q_PROPERTY(QString windowTitle READ windowTitle WRITE setWindowTitle)
+
+public:
+    enum SurfaceType { RasterSurface, OpenGLSurface };
+
+    QWindow(QScreen *screen = 0);
+    QWindow(QWindow *parent);
+    virtual ~QWindow();
+
+    void setSurfaceType(SurfaceType surfaceType);
+    SurfaceType surfaceType() const;
+
+    void setVisible(bool visible);
+    bool visible() const;
+
+    void create();
+
+    WId winId() const;
+
+    QWindow *parent() const;
+    void setParent(QWindow *parent);
+
+    bool isTopLevel() const;
+
+    bool isModal() const;
+    Qt::WindowModality windowModality() const;
+    void setWindowModality(Qt::WindowModality windowModality);
+
+    void setFormat(const QSurfaceFormat &format);
+    QSurfaceFormat format() const;
+
+    void setWindowFlags(Qt::WindowFlags flags);
+    Qt::WindowFlags windowFlags() const;
+    Qt::WindowType windowType() const;
+
+    QString windowTitle() const;
+
+    void setOpacity(qreal level);
+    void requestActivateWindow();
+
+    Qt::WindowState windowState() const;
+    void setWindowState(Qt::WindowState state);
+
+    void setTransientParent(QWindow *parent);
+    QWindow *transientParent() const;
+
+    QSize minimumSize() const;
+    QSize maximumSize() const;
+    QSize baseSize() const;
+    QSize sizeIncrement() const;
+
+    void setMinimumSize(const QSize &size);
+    void setMaximumSize(const QSize &size);
+    void setBaseSize(const QSize &size);
+    void setSizeIncrement(const QSize &size);
+
+    void setGeometry(const QRect &rect);
+    QRect geometry() const;
+
+    inline int width() const { return geometry().width(); }
+    inline int height() const { return geometry().height(); }
+    inline int x() const { return geometry().x(); }
+    inline int y() const { return geometry().y(); }
+
+    inline QSize size() const { return geometry().size(); }
+    inline QPoint pos() const { return geometry().topLeft(); }
+
+    inline void resize(const QSize &size) { setGeometry(QRect(pos(), size)); }
+    inline void resize(int w, int h) { setGeometry(QRect(x(), y(), w, h)); }
+
+    QMargins frameMargins() const;
+
+    void setWindowIcon(const QImage &icon) const;
+
+    void destroy();
+
+    QPlatformWindow *handle() const;
+
+    bool setKeyboardGrabEnabled(bool grab);
+    bool setMouseGrabEnabled(bool grab);
+
+    QScreen *screen() const;
+    void setScreen(QScreen *screen);
+
+public Q_SLOTS:
+    inline void show() { setVisible(true); }
+    inline void hide() { setVisible(false); }
+
+    void showMinimized();
+    void showMaximized();
+    void showFullScreen();
+    void showNormal();
+
+    bool close();
+    void raise();
+    void lower();
+
+    void setWindowTitle(const QString &);
+
+Q_SIGNALS:
+    void backBufferReady();
+
+protected:
+    virtual void exposeEvent(QExposeEvent *);
+    virtual void resizeEvent(QResizeEvent *);
+
+    virtual void showEvent(QShowEvent *);
+    virtual void hideEvent(QHideEvent *);
+
+    virtual bool event(QEvent *);
+    virtual void keyPressEvent(QKeyEvent *);
+    virtual void keyReleaseEvent(QKeyEvent *);
+    virtual void inputMethodEvent(QInputMethodEvent *);
+    virtual void mousePressEvent(QMouseEvent *);
+    virtual void mouseReleaseEvent(QMouseEvent *);
+    virtual void mouseDoubleClickEvent(QMouseEvent *);
+    virtual void mouseMoveEvent(QMouseEvent *);
+#ifndef QT_NO_WHEELEVENT
+    virtual void wheelEvent(QWheelEvent *);
+#endif
+
+    QWindow(QWindowPrivate &dd, QWindow *parent);
+
+private:
+    QPlatformSurface *surfaceHandle() const;
+
+    Q_DISABLE_COPY(QWindow)
+
+    friend class QGuiApplication;
+    friend class QGuiApplicationPrivate;
+    friend Q_GUI_EXPORT QWindowPrivate *qt_window_private(QWindow *window);
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QWINDOW_QPA_H