bool PainterItem::eventFilter(QObject *watched, QEvent *event)
{
        return handleEvent(static_cast<QMouseEvent*>(event));
}
bool PainterItem::handleEvent(QMouseEvent *event)
{
    switch (event->type()) {
    case  QEvent::MouseButtonPress: {
        qDebug() << "PainterItem::mousePressEvent(QPointF *event)";
        isMousePressed = true;

        PaintLine pl;
        paintLines.append(pl);
        paintLinesIter = paintLines.size() - 1;

        QPointF point( event->x(), event->y() );
        paintLines[paintLinesIter].points.append( point );
        return true;
    }
    case  QEvent::MouseButtonRelease: {
        qDebug() << "PainterItem::mouseReleaseEvent(QPointF *event)";
        isMousePressed = false;
        return true;
    }
    case  QEvent::MouseMove: {
        qDebug() << "PainterItem::mouseMoveEvent(QPointF *event)";

        if(isMousePressed) {
            QPointF point( event->x(), event->y() );
            paintLines[paintLinesIter].points.append( point );
        }
        return true;
    }
    default: {
        return false;
    }
    }

    return false;
}