Pad Component for X and Y Point manipulation

I'm currently working on a pad component (for a JUCE VST Plugin) having a X and Y axis to manipulate a Point on it. I hope everybody understands what I mean, maybe this (aaawesome!) mockup will help you understand:


Pad Mockup


Is there anyone developing an open source project or knows one, providing this kind of component? I have not found any but maybe I'm just blind, I thought this is one of the most common things in VST Plugins to have...


I'm glad for any help on this topic.