[...] is 1 for the left mouse button, 2 for the middle button and 3 for the right button (and 4 and 5 for the wheel).
[...]
[...] For OpenGLContext:
0 -- first mouse button, "left" 1 -- second mouse button, "right" 2 -- third mouse button, "middle"
[...] Anyway, trivial change to implement. Thanks for letting me know I'm off base, Matthias,
- Matthias -