Re: Efficient use of GDK Graphic contexts

[Stefan Kost <ensonic hora-obscura de>]

Hi Greg,

two ideas:
1) clean: subclass the widget and store the GC in your class
2) dirty: use g_object_set/get_qdata() to attacht the GC to the objects

Stefan


> I'm building a form designer application and need to draw a "grab"
> border around widgets when the user selects them.  This part seems
> straight forward and I've already got the border drawing working from
> the expose event.  My question is how do do this in an efficient manner
> since GCs seem to be tied to windows.
>
> Currently I'm just building and destroying a new GC each time the
> expose() event fires.  I know this isn't efficient at all, and I only
> did it this was to test that I could actually draw a border.  GCs are
> tied to windows, so it would seem I'll need a GC for each widget on my
> form or can I have one GC and use it for all the widgets?  I guess I'm
> asking what sort of overhead is involved in:
>
> 1) Creating a GC
> 2) Destroying a GC
> 3) Switching the window a GC is connected to
> 4) Memory overhead of each GC
>
> Thanks for any help or suggestions.
>
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list