funny flicker when moving around buttons

[Fritz Heinrichmeyer <fritz heinrichmeyer fernuni-hagen de>]

I tried to do the same in GTK what was most easy in Java and middle easy
in tcltk:

Putting a button somewhere in a canvas and then dragging it around.

My solution flickers very funny (reminds me on hotjava scrollbar
behavior under unix).

Maybe somoeone on this list tries it out and gives some comment!

Here is my little program:

myeditor.c