Support default gestures for two finger scroll/zoom via touch pad (Mac / Windows / ...)

Edit: Updated for clarity.

The default mapping of two finger move on most desktop platforms is scrolling (horizontally or vertically) rather than zooming. Two finger pinching on the other hand is the default gesture for zooming in.

Switching to the default operating system behavior would improve the usability of the Camunda Modeler for average users. See suggested mappings / scroll directions below.

Tasks

• Support default 2-finger scroll / zoom gestures on all OS(s)

Note

• This needs changes in the underlying modeling toolkits. We need to investigate, whether to provide fallbacks to the current behavior there.

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Suggested Mappings

gesture	action
two finger vertical move	scroll vertically
two finger horizontal move	scroll horizontally
two finger pinch	zoom in/out

Document/Canvas Scroll Directions

The following table summarizes the document scroll direction on two finger gestures for the different OS(s):

gesture	default	Mac
2-finger-up	to top	to bottom
2-finger-down	to bottom	to up
2-finger-left	to left	to right
2-finger-right	to right	to left
pinch-in *	zoom out	zoom out
pinch-out **	zoom in	zoom in

* moving fingers closer to each other ** moving fingers away from each other

[nikku]

Will be addressed in the next version of the Camunda Modeler.

[tsabirgaliev]

@nikku this is what I mean by ‘OS setting’: