Method sidebarPaintEvent

ui/codeeditor/codeeditor.cpp:162–208

}

void CodeEditor::sidebarPaintEvent(QPaintEvent *event)
{
    QPainter painter(m_sideBar);
    painter.fillRect(event->rect(), palette().color(QPalette::Window));

    auto block = firstVisibleBlock();
    auto blockNumber = block.blockNumber();
    int top = blockBoundingGeometry(block).translated(contentOffset()).top();
    int bottom = top + blockBoundingRect(block).height();
    const auto foldingMarkerSize = foldingBarWidth();

    while (block.isValid() && top <= event->rect().bottom()) {
        if (block.isVisible() && bottom >= event->rect().top()) {
            const auto number = QString::number(blockNumber + 1);
            painter.setPen(palette().color(QPalette::Text));
            painter.drawText(0, top, m_sideBar->width() - 2 - foldingMarkerSize, fontMetrics().height(), Qt::AlignRight, number);
        }

        // folding marker
#ifdef HAVE_SYNTAX_HIGHLIGHTING
        if (block.isVisible() && isFoldable(block)) {
            QPolygonF polygon;
            if (isFolded(block)) {
                polygon << QPointF(foldingMarkerSize * 0.4, foldingMarkerSize * 0.25);
                polygon << QPointF(foldingMarkerSize * 0.4, foldingMarkerSize * 0.75);
                polygon << QPointF(foldingMarkerSize * 0.8, foldingMarkerSize * 0.5);
            } else {
                polygon << QPointF(foldingMarkerSize * 0.25, foldingMarkerSize * 0.4);
                polygon << QPointF(foldingMarkerSize * 0.75, foldingMarkerSize * 0.4);
                polygon << QPointF(foldingMarkerSize * 0.5, foldingMarkerSize * 0.8);
            }
            painter.save();
            painter.setRenderHint(QPainter::Antialiasing);
            painter.setPen(Qt::NoPen);
            painter.setBrush(palette().color(QPalette::Highlight));
            painter.translate(m_sideBar->width() - foldingMarkerSize, top);
            painter.drawPolygon(polygon);
            painter.restore();
        }
#endif

        block = block.next();
        top = bottom;
        bottom = top + blockBoundingRect(block).height();
        ++blockNumber;
    }
}

void CodeEditor::highlightCurrentLine()
{