WPF graph how to ensure square zoom area

[Bob.Ter]

For WPF graph area zoom, is it possible to customize the selection area to be a square, to ensure same zoom scale on both horizontal and vertical axis? 

[francine.p]

Take a look at this forum post discussion, as it might have some insight on what you're trying to do:

https://forums.ni.com/t5/Measurement-Studio-for-NET/WPF-Graph-zoom/td-p/2696947

[phansen]

I am traveling this month, so I can't provide an example, but you can accomplish this by creating a custom Graph Interaction http://zone.ni.com/reference/en-XX/help/372636F-01/mstudiowebhelp/html/def9143a/ .  (You may be able to simply adjust the mouse positions in the args, and then call into the base Zoom interaction to update the visual.)