Able to click on moving gridshapes.

Hi,

I am developing a touchscreen interface in Jitter with no tird-party software.
I made a nice framework in jitter with several videoplanes and text objects in a so created interactive videowall.
For the design, i converted all the video's to a jit.gl.gridshape, so i can scroll trough all the video with the render camera movements. The user, which sees the jit.window screen, must be able to click on the videoplanes.

My question is how can i get each of the video gridshapes give an hover-over function and working like a button.
(When the user clicked the video, the camera movements are moving to a fullsize video view)

Another solution i was trying is to have the real coördinates of the gridshapes, but they have to be adjusted when the jit.gl.render camera angle is different. But i don't know how to get those coördinates.

Anyone suggestions?
Really thanks in advance!

Stefan