Creating a interactive timeline control/editor
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 I wanted to create a timeline-based slider something like youtube has now. - Move horizontally just like QSlider
- Hover would display time or some other status when hover over
- Markers on the slider timeline that indicate something (youtube had those yellow markers on the slider that indicated ads)
 This might be not capable - even with customizing - for QT? So I was conceding to something like this where the slider updates timeline-based control or something else: 
  I was wondering what's the best approach to subclass an existing control to create a graphical timeline (with that hover popup) Or should I be looking at something like QGraphicsView? The interactive timeline (often seen in video editors) is the goal for me. Any help would be appreciated! 
