common/include/QtGui/qpaintdevicewindow.h

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#ifndef QPAINTDEVICEWINDOW_H
#define QPAINTDEVICEWINDOW_H

#include <QtGui/QWindow>
#include <QtGui/QPaintDevice>

QT_BEGIN_NAMESPACE

class QPaintDeviceWindowPrivate;
class QPaintEvent;

class Q_GUI_EXPORT QPaintDeviceWindow : public QWindow, public QPaintDevice
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QPaintDeviceWindow)

public:
    void update(const QRect &rect);
    void update(const QRegion &region);

    using QWindow::width;
    using QWindow::height;
    using QWindow::devicePixelRatio;

public Q_SLOTS:
    void update();

protected:
    virtual void paintEvent(QPaintEvent *event);

    int metric(PaintDeviceMetric metric) const Q_DECL_OVERRIDE;
    void exposeEvent(QExposeEvent *) Q_DECL_OVERRIDE;
    bool event(QEvent *event) Q_DECL_OVERRIDE;

    QPaintDeviceWindow(QPaintDeviceWindowPrivate &dd, QWindow *parent);

private:
    QPaintEngine *paintEngine() const Q_DECL_OVERRIDE;
    Q_DISABLE_COPY(QPaintDeviceWindow)
};

QT_END_NAMESPACE

#endif