[gtkada] adding and removing widgets in a container

[Emmanuel Briot]

"Torsten Leistikow" <leistikow at stn-atlas.de> writes:

> No problem here.
> 
> Remove (Frame, Label);
> 
> No Problem here.
> 
> Add (Frame, Label);
> 
> Now I get the error message
> 
> gtk-CRITICAL **: file gtkcontainer.c: line 714 (gtk_container_add):
> assertion `GTK_IS_WIDGET (widget)´ failed

Do not forget that widgets are reference-counted. When you remove it from its
parent, its reference count is 0, and the widget is destroyed. You thus need to
call Gtk.Object.Ref on it before doing the remove.
Check the User's guide for more information

Emmanuel