How to Drawing a stock gtk+-widget into cell-renderers cell?

[Mirco Müller <mirco pool informatik rwth-aachen de>]

Greetings everybody!

   I'm still trying to write a cell-renderer version of GtkOptionMenu. 
I got to a point where the the basic infrastructure of the 
GtkCellRendererOption (that's what I called it) works somehow. But know 
I need to actually have the GtkOptionMenu drawn into the cell. I can 
draw to a cell using the normal gdk functions. But how can I attach the 
GtkOptionMenu to the cell. I know that a cell-renderer is not a widget 
and thus cannot be treated that way. But there has to be a way to do 
this. After all even GtkMenuOption uses gdk-calls to render itself.
   Any hints are greatly welcome! I looked already at the soucecode or 
"Mr Project". But there a GTK_WINDOW_POPUP is used to place all needed 
widgets relative to the active cell. This only happens when a cell is 
clicked. But I want to have the GtkOptionMenu be really drawn in the 
cell all the time. Not only when the user selects a cell.
Thanks in advance for your time and kind advice!

Best regards...

Mirco