| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtGui module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ****************************************************************************/ |
| |
| #ifndef QPAINTDEVICEWINDOW_P_H |
| #define QPAINTDEVICEWINDOW_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 |