ui_rect a0 = { rect[0] - 20 - hb, rect[1] + rect[3]/2 - hb, b,b },
a1 = { rect[0] + rect[2] + 20 + hb, rect[1] + rect[3]/2 - hb, b,b };
ui_rect a0 = { rect[0] - 20 - hb, rect[1] + rect[3]/2 - hb, b,b },
a1 = { rect[0] + rect[2] + 20 + hb, rect[1] + rect[3]/2 - hb, b,b };