Re: OpenGL and overlapping widget

[Tristan Van Berkom <tvb gnome org>]

On Sat, Jul 17, 2010 at 3:19 PM, Michael Goffioul
<michael goffioul gmail com> wrote:
> Hi,
>
> I'm trying to use OpenGL with regular GTK+ widgets within the same
> window and I want to make the widgets (buttons, text fields...) to
> overlap the OpenGL area and appears in front of it. I tried with GtkGLArea
> and GtkGLExt, but all my tests were unsuccessful so far. In all cases,
> the OpenGL area will always appear in front, overlapping any GTK+ widget.

I'm not sure off the top of my head what the exact combination is, but
you can do this by combining Clutter with GTK+ (maybe by using
a specialized ClutterActor, or by rendering your widgets to a GtkOffscreenWindow
and blitting that to an actor or such).

Cheers,
         -Tristan

>
> My test case is the following: create a GtkFixed widget with 2 children
> (added in that order):
> - 1 OpenGL area filling the whole allocated space of the GtkFixed
>  (GtkGLArea widget, or GtkGLExt-enabled GtkDrawingArea)
> - 1 button placed somewhere in the GtkFixed
>
> What I need is to make the button to appear in front of the OpenGL area.
> I'm using Windows (but the target app must be cross-platform).
>
> Any idea how can I achieve this?
> Thanks.
>
> Michael.
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