How to freeze the scroll event on GLSP beyond specific zoom value

[praveen69sk]

Hi,

I have the following the requirement:

1. When a user is scrolling the mouse wheel (Zoom In/Out) on the canvas, He should be able to zoom in/out.
2. Have set the thresholds betwee
   
   n 2 to 200%, but when it reaches the Max threshold, scroll event is still happening and canvas view is going out of view. (Means it is scrolling to some other co-ordinates)

Requesting yours suggestions to limit the scroll event of the canvas, That should get freeze when the zoom values goes beyond the threshold values.

[planger]

Hi,

I think you would have to rebind a customized version of the Sprotty's zoom listener to do that and limit when and which SetViewportAction you are sending. Alternatively, you can also rebind and customize the handler of the SetViewportAction, which is the SetViewPortCommand.

Both the zoom listener and the SetViewportCommand are bound here https://github.com/eclipse/sprotty/blob/master/packages/sprotty/src/features/viewport/di.config.ts.

[praveen69sk]

Thanks a lot! for the quick response. Will check this and let you know.