[tracecompass-dev] Collapse/Expand all in Time Graph views

[Bernd Hufmann <bernd.hufmann@xxxxxxxxxxxx>]

Hi

We got the request to support collapsing/expanding all tree items in the 
time graph views like the Control Flow view.

I did some investigation for the implementation of collapse / expand all 
feature in the Time graph views. Both the TimeGraphCombo and 
TimeGraphViewer have already an interface to do that. In the 
AbstractTimeGraphView, the ITimeGraphWrapper interface needs to be 
augmented to call these methods.

The trigger these actions we could implement a  context-sensitive menu 
(right-mouse click), an entry into the toolbar menu or 2 separate 
buttons in the toolbar. However, the toolbar is already crowded with a 
lot of buttons and we should not add these buttons since they are not 
necessary used often.

I propose to add them into the toolbar menu because they apply on the 
whole tree and not just on the current selection.

Thoughts?

/Bernd