Sets an error on the area which will be shown instead of the GL rendering.
This is useful in the signalGtk.GLArea::create-context signal if GL context creation fails.
a new glib.error.ErrorG, or null to unset the error
Sets an error on the area which will be shown instead of the GL rendering.
This is useful in the signalGtk.GLArea::create-context signal if GL context creation fails.