qt5/QtPainter.hxx

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 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#pragma once
 
#include <QtCore/QRectF>
#include <QtGui/QPainter>
#include <QtWidgets/QWidget>
 
#include "QtFrame.hxx"
#include "QtGraphics.hxx"
 
class QtPainter final : public QPainter
{
    QtGraphicsBackend& m_rGraphics;
    QRegion m_aRegion;
 
public:
    QtPainter(QtGraphicsBackend& rGraphics, bool bPrepareBrush = false,
              sal_uInt8 nTransparency = 255);
    ~QtPainter()
    {
        if (m_rGraphics.m_pFrame && !m_aRegion.isEmpty())
            m_rGraphics.m_pFrame->GetQWidget()->update(m_aRegion);
    }
 
    void update(int nx, int ny, int nw, int nh)
    {
        if (m_rGraphics.m_pFrame)
            m_aRegion += scaledQRect({ nx, ny, nw, nh }, 1 / m_rGraphics.devicePixelRatioF());
    }
 
    void update(const QRect& rRect)
    {
        if (m_rGraphics.m_pFrame)
            m_aRegion += scaledQRect(rRect, 1 / m_rGraphics.devicePixelRatioF());
    }
 
    void update(const QRectF& rRectF)
    {
        if (m_rGraphics.m_pFrame)
            update(scaledQRect(rRectF.toAlignedRect(), 1 / m_rGraphics.devicePixelRatioF()));
    }
 
    void update()
    {
        if (m_rGraphics.m_pFrame)
            m_aRegion += m_rGraphics.m_pFrame->GetQWidget()->rect();
    }
};
 
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