OSD Keyboard

Hi team,
I just started working on the OSD keyboard but iam facing some problems 
   ;)
1. Graphics: For the OSD Keyboard i need a way to draw a sort of 
"overlay" on top of the normal STK graphic output
2. Activation: For activation of the OSD keyboard i need some sort of 
button on the gui, the problem is that this button may not cause the 
previous widget to unfocus because otherwise there is no focussed widget 
the OSD could input into
3. Event handling: the OSD keyboard needs to handle events before they 
reach the rest of the library, i dont want to change focus etc, so i 
need some way to filter the received mouse events (change to mainloop maybe)