Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #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:
++ QPaintDeviceWindowPrivate();
++ ~QPaintDeviceWindowPrivate() override;
++
++ virtual void handleResizeEvent() {}
++
++ 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