Re: gtk/gtkglext help please

[David Nečas (Yeti) <yeti physics muni cz>]

On Tue, Jun 06, 2006 at 11:32:43PM -0600, Brett Stottlemyer wrote:
> I'm interested in displaying large quantities of scientific data in a
> UNIX/LINUX environment.  I write computationally intensive code in C++, and
> I've used tools like matlab to display results, including generating GUIs
> (i.e., I'm familiar will callbacks and event driven programming, at least
> somewhat).  The problem is that if I have my code output a file for matlab
> to import, the feedback to the code is lost.
>
> So I want to take the plunge and start writing displays and a UI for my
> code.  I'd like to take advantage of the video hardware (seems like OpenGL's
> Display Lists would be very useful), so using gtkglext with GTK+ seems like
> a good option.  My desire is to be able to display lots of data and
> manipulate the view as well as interactively select portions of the data for
> additional processing.
>
> So, my questions are:
>
> 1)       Does creating my own windows with GTK+ and gtkglext seem like a
> good option?

Yes, and I would s/windows/widgets/.

> 2)       If so, the tutorials included with gtkglext don't include any
> menus, so is there any sort of tutorial for allowing OpenGL processing
> within a drawable widget while still having other widgets for UI (rotation,
> data selection, etc.)?

Where did you look? The are lots of examples in examples/
in GtkGLExt source tarball and they include buttons, context
menus, even a GtkButton with an OpenGL area on it.

You can also have a look at Gwy3DView and Gwy3DWindow
widgets in Gwyddion (http://gwyddion.net/) as a bit more
complex examples with rotation, zoom, light position setting
and additional controls.

Once you create your own OpenGL widget -- which should be
easy based on the examples -- you can work with it as with
any other widget.  And the only places where the GL-ness
affects widget implementation will be probably
initialization (setting gl capability), configure
(glViewport) and of course expose (drawing).

Yeti


--
Anonyms eat their boogers.