muppet wrote:
A slightly sneakier solution is to use an actual widget as a fake popup, by using manual absolute position layout. We just tell the widget that its parent is the toplevel window, and then update the widget's position from the toplevel window's size-allocate as though we were implementing a fixed-position layout container. The advantage here is that the "popup" tracks the toplevel's position perfectly during moves because the X server moves the GdkWindow for us, removing all of the lag and z-order problems of the separate window solution. Also, using size-allocate is a little easier. ;-)
Great, your prototype implements exactly what I was looking for and the code is quite easy to understand, thanks!
In both solutions, the keyboard focus is an interesting issue. The code i implemented ignores the "popup"'s keyboard focus altogether -- it doesn't get focus when toggled visible, and doesn't get inserted into the toplevel's focus chain. You didn't mention whether you wanted to have actual interactive widgets in your popup, or whether it was just for information display. I leave that as an exercise for you. ;-)
It's for informational purposes, so keyboard focus is not important.
Regards,
Joern
--
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