Method paintEvent

src/Overview.cpp:280–318

}

void Overview::paintEvent(QPaintEvent*)
{
    if(m_pDiff3LineList == nullptr) return;
    qint32 h = height() - 1;
    qint32 w = width();

    const auto dpr = devicePixelRatioF();
    if(m_pixmap.size() != size() * dpr)
    {
        m_nofLines = m_pDiff3LineList->numberOfLines(gOptions->wordWrapOn());

        m_pixmap = QPixmap(size() * dpr);
        m_pixmap.setDevicePixelRatio(dpr);

        QPainter p(&m_pixmap);
        p.fillRect(rect(), gOptions->backgroundColor());

        if(!KDiff3App::isTripleDiff() || mOverviewMode == e_OverviewMode::eOMNormal)
        {
            drawColumn(p, e_OverviewMode::eOMNormal, 0, w, h, m_nofLines);
        }
        else
        {
            drawColumn(p, e_OverviewMode::eOMNormal, 0, w / 2, h, m_nofLines);
            drawColumn(p, mOverviewMode, w / 2, w / 2, h, m_nofLines);
        }
    }

    QPainter painter(this);
    painter.drawPixmap(0, 0, m_pixmap);
    qint32 y1 = 0, h1 = 0;
    if(m_nofLines > 0)
    {
        y1 = h * m_firstLine / m_nofLines - 1;
        h1 = h * m_pageHeight / m_nofLines + 3;
    }
    painter.setPen(Qt::black);
    painter.drawRect(1, y1, w - 1, h1);
}