Method mouseMoveEvent

src/difftextwindow.cpp:789–847

}

void DiffTextWindow::mouseMoveEvent(QMouseEvent* e)
{ //Handles selection highlighting.
    LineRef line;
    qint32 pos;

    qCInfo(kdiffDiffTextWindow) << "Mouse Moved";
    qCDebug(kdiffDiffTextWindow) << "d->m_lastKnownMousePos = " << d->m_lastKnownMousePos << ", e->pos() = " << e->pos();

    convertToLinePos(e->pos().x(), e->pos().y(), line, pos);
    d->m_lastKnownMousePos = e->pos();

    qCDebug(kdiffDiffTextWindow) << "line = " << line << ", pos = " << pos;

    if(d->m_selection.isValidFirstLine())
    {
        qCDebug(kdiffDiffTextWindow) << "d->m_selection.isValidFirstLine() = " << d->m_selection.isValidFirstLine();
        const bool selectionWasEmpty = d->m_selection.isEmpty();
        d->m_selection.end(line, pos);
        if(!d->m_selection.isEmpty() && selectionWasEmpty)
            Q_EMIT newSelection();

        showStatusLine(line);

        // Scroll because mouse moved out of the window
        const QFontMetrics& fm = fontMetrics();
        qint32 fontWidth = fm.horizontalAdvance('0');
        qint32 deltaX = 0;
        qint32 deltaY = 0;
        //TODO: Fix after line number area is converted to a QWidget.
        //FIXME: Why are we manually doing Layout adjustments?
        if(!gOptions->m_bRightToLeftLanguage)
        {
            if(e->pos().x() < d->leftInfoWidth() * fontWidth) deltaX = -1 - abs(e->pos().x() - d->leftInfoWidth() * fontWidth) / fontWidth;
            if(e->pos().x() > width()) deltaX = +1 + abs(e->pos().x() - width()) / fontWidth;
        }
        else
        {
            if(e->pos().x() > width() - 1 - d->leftInfoWidth() * fontWidth) deltaX = +1 + abs(e->pos().x() - (width() - 1 - d->leftInfoWidth() * fontWidth)) / fontWidth;
            if(e->pos().x() < fontWidth) deltaX = -1 - abs(e->pos().x() - fontWidth) / fontWidth;
        }
        if(e->pos().y() < 0) deltaY = -1 - (qint32)std::pow<qint32, qint32>(e->pos().y(), 2) / (qint32)std::pow(fm.lineSpacing(), 2);
        if(e->pos().y() > height()) deltaY = 1 + (qint32)std::pow(e->pos().y() - height(), 2) / (qint32)std::pow(fm.lineSpacing(), 2);
        if((deltaX != 0 && d->m_scrollDeltaX != deltaX) || (deltaY != 0 && d->m_scrollDeltaY != deltaY))
        {
            d->m_scrollDeltaX = deltaX;
            d->m_scrollDeltaY = deltaY;
            Q_EMIT scrollDiffTextWindow(deltaX, deltaY);
            if(d->m_delayedDrawTimer)
                killTimer(d->m_delayedDrawTimer);
            d->m_delayedDrawTimer = startTimer(50);
        }
        else
        {
            d->m_scrollDeltaX = deltaX;
            d->m_scrollDeltaY = deltaY;
            d->myUpdate(0);
        }
    }