void vogleditor_QTimelineView::wheelEvent(QWheelEvent *event)
{
if (event->modifiers() & Qt::ControlModifier)
{
float oldZoom=m_zoom;
int oldScroll=m_scroll;
if (event->angleDelta().y()>0)
m_zoom=m_zoom*(1.2f);
else
m_zoom=m_zoom/(1.2f);
m_zoom = qMax(m_zoom, 1.0f);
if ((long int)m_zoom*((long int)width())+(long int)m_gap*2+(long int)width() > 2147483647)
{
m_zoom=oldZoom;
return;
}
//Update the scrolol range in scroll bars before updating the scroll position.
emit(scrollRangeChanged(0, (int)((double)m_zoom*(double)width()-width())));
//Keep time line stationary under the mouse (using the oldScroll in case m_scroll was changes when updating the limits):
scrollToPx(((double)(oldScroll+event->x())/(double)oldZoom)*(double)m_zoom-event->x());
}else
{
scrollToPx(m_scroll-event->angleDelta().y()/3);
}
}
void GuiScrollBar::setScrollRange(size_t range) {
dynamic_cast<MyGUI::ScrollBar*>(getMyGUIWidget())->setScrollRange(range);
emit scrollRangeChanged(range);
}
void vogleditor_QTimelineView::resetZoom()
{
m_zoom=1;
emit(scrollRangeChanged(0, 0));
}