Method setFirstLine

src/difftextwindow.cpp:504–528

}

void DiffTextWindow::setFirstLine(LineRef firstLine)
{
    qint32 fontHeight = fontMetrics().lineSpacing();

    LineRef newFirstLine = std::max<LineRef>(0, firstLine);

    qint32 deltaY = fontHeight * (d->m_firstLine - newFirstLine);

    d->m_firstLine = newFirstLine;

    if(d->m_bSelectionInProgress && d->m_selection.isValidFirstLine())
    {
        LineRef line;
        qint32 pos;
        convertToLinePos(d->m_lastKnownMousePos.x(), d->m_lastKnownMousePos.y(), line, pos);
        d->m_selection.end(line, pos);
        update();
    }
    else
    {
        scroll(0, deltaY);
    }

    Q_EMIT firstLineChanged(d->m_firstLine);
}

LineRef DiffTextWindow::getFirstLine() const
{