Hello list, In racket 5.1 from the gentoo lisp overlay,
When I create an canvas% after a button press, it does not support OpenGL. This does not occur with a canvas created immediately on a frame%. Have a look at the attachment to see if you can replicate this: $ gracket works.rkt Canvas has a GL context $ gracket dont_work.rkt (object:button% ...) GtkGLExt: gtk_widget_set_gl_capability: assertion `!GTK_WIDGET_REALIZED (widget)' failed Canvas does not have a GL context Is this a bug or am I doing it wrong? I don't know GTK but I did some research and it seems the GTK assertion means the canvas is not on the screen. I'm not really sure how to approach that, I did some tinkering with turning the frame on and off before canvas creation, made no difference. Rapt with anticipation, Johnny
opengl-button-canvas.tar.gz
Description: GNU Zip compressed data
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