Enrich listened events for event layers

[ptaillandier]

I will like to have the possibility to define as listened events:

• right-click on the mouse
  • combination of listened events: mouse click + one key pressed for example.

[AlexisDrogoul]

I understand -- but how to deal, then, with already registered "default" events for key+mouse ? (ctrl-click, alt-move, ctrl-move, etc...) ?

[ptaillandier]

We can just replace the default "event" by the new defined one.