20:32:37 <shadowm> fabi_: The radio button behavior is good, but I don't think you are doing the visual part correctly with regards to the brush size icons.
20:34:06 <shadowm> fabi_: Pressed buttons should either shift their contents by (1,1) on the x and y axes, or not shift them at all. GUI2 buttons do the latter, GUI1 buttons do the former.
20:34:56 <shadowm> fabi_: The brush buttons seem to shift by (-2,0) instead.
20:35:40 <shadowm> fabi_: This looks incredibly weird and inconsistent in practice.