void ProfileGraphicsView::wheelEvent(QWheelEvent* event)
{
if (!toolTip)
return;
// doesn't seem to work for Qt 4.8.1
// setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
// Scale the view / do the zoom
QPoint toolTipPos = mapFromScene(toolTip->pos());
double scaleFactor = 1.15;
if (event->delta() > 0 && zoomLevel < 20) {
scale(scaleFactor, scaleFactor);
zoomLevel++;
} else if (event->delta() < 0 && zoomLevel > 0) {
// Zooming out
scale(1.0 / scaleFactor, 1.0 / scaleFactor);
zoomLevel--;
}
scrollViewTo(event->pos());
toolTip->setPos(mapToScene(toolTipPos));
toolBarProxy->setPos(mapToScene(TOOLBAR_POS));
if (zoomLevel != 0) {
toolBarProxy->hide();
} else {
toolBarProxy->show();
}
}
void ProfileGraphicsView::mouseMoveEvent(QMouseEvent* event)
{
if (!toolTip)
return;
toolTip->refresh(&gc, mapToScene(event->pos()));
QPoint toolTipPos = mapFromScene(toolTip->pos());
scrollViewTo(event->pos());
if (zoomLevel == 0)
QGraphicsView::mouseMoveEvent(event);
else
toolTip->setPos(mapToScene(toolTipPos).x(), mapToScene(toolTipPos).y());
}
