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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QPAINTDEVICEWINDOW_P_H
#define QPAINTDEVICEWINDOW_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtGui/private/qtguiglobal_p.h>
#include <QtGui/QPaintDeviceWindow>
#include <QtCore/QCoreApplication>
#include <QtGui/private/qwindow_p.h>
#include <QtGui/QPaintEvent>
QT_BEGIN_NAMESPACE
class Q_GUI_EXPORT QPaintDeviceWindowPrivate : public QWindowPrivate
{
Q_DECLARE_PUBLIC(QPaintDeviceWindow)
public:
virtual void beginPaint(const QRegion ®ion)
{
Q_UNUSED(region);
}
virtual void endPaint()
{
}
virtual void flush(const QRegion ®ion)
{
Q_UNUSED(region);
}
bool paint(const QRegion ®ion)
{
Q_Q(QPaintDeviceWindow);
QRegion toPaint = region & dirtyRegion;
if (toPaint.isEmpty())
return false;
// Clear the region now. The overridden functions may call update().
dirtyRegion -= toPaint;
beginPaint(toPaint);
QPaintEvent paintEvent(toPaint);
q->paintEvent(&paintEvent);
endPaint();
return true;
}
void doFlush(const QRegion ®ion)
{
QRegion toFlush = region;
if (paint(toFlush))
flush(toFlush);
}
void handleUpdateEvent()
{
if (dirtyRegion.isEmpty())
return;
doFlush(dirtyRegion);
}
void markWindowAsDirty()
{
Q_Q(QPaintDeviceWindow);
dirtyRegion += QRect(QPoint(0, 0), q->size());
}
private:
QRegion dirtyRegion;
};
QT_END_NAMESPACE
#endif //QPAINTDEVICEWINDOW_P_H
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