[GUI] Composite state inner region scroll

[wixiw]

When I click on a composite state inner region, the graphical editor automatically scroll the view (I suppose to try something like a "zoom to fit". It's very annoying as it moves the item on which I have the "mind" focus that I have to search after the scroll.

I would expect the view to stay on its current position.

It's an edition performance issue, as it doesn't prevent to reach the user goal.

[andreasmuelder]

Not sure if we should change this. Maybe your expectation here is not the same as other users would expect. @svenjawendler what do you think? If we add an option to the diagram preferences, what should be the default?

[svenjawendler]

The user only clicks on a region and suddenly the whole diagram moves. For my point of view and also of other users I talked to (it also came up in the surveys) this is not conformous to the user expectation which is a requirement for ergonomic user interfaces (ISO 9041 110).

My suggestion:

1. Change the default behavior to not moving the diagram if the user did not explicitly forced it.
2. If there does not exist a requirement for 'readjusting' the view, I would suggest not to do it.

[andreasmuelder]

@svenjawendler thanks, we will implement it as you suggested.

[andreasmuelder]

fixed via PR #1428