Hi guys,
I was quiet busy today to find a solution to that problem on my own, because I really need this for a mixed virtual reality installation. But as you all already realized it’s not natively possible to use the mouse on a widget which gets drawn to the spectator screen as render target aka texture.
What I ended up doing was to split the screen in several parts and display the widget in one of them, while doing the changes to the widget all by keyboard commands. So it basically degraded my widget to an info screen, which is okay for now, because I only wanted to visualize the changes made to write them down or save and load them later on.
But if any of you found a solution to this, I would really appreciate to hear it.