> I've run into this on Suns when getting a drawing area widget and end
> up with an 8 bit visual and want a 24 bit visual.
>
> Is the following ok (as long as I do it before the widget is realized)?
>
> GdkVisual *vis_24 = gdk_visual_get_best_with_depth(24);
> if (vis_24) {
> gtk_widget_set_visual(GTK_WIDGET(widget_), vis_24);
> }
In general you don't want to do this, since it won't work for machines
without 24-bit visuals.
What you usually care about is just a "thin" visual for most of your
app and a "fat" visual for the widgets that require high image
quality. Assuming you will be painting to these widgets with
something like GdkRGB, it is better to do
/* Make sure GdkRGB is initialized */
gdk_rgb_init ();
/* Switch to a fat visual */
gtk_widget_push_visual (gdk_rgb_get_visual ()):
gtk_widget_push_colormap (gdk_rgb_get_cmap ());
da = gtk_drawing_area_new ();
/* Go back to the default visual */
gtk_widget_pop_colormap ();
gtk_widget_pop_visual ();
Good luck,
Federico
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