# Button values5 p; P+ b" Q8 O9 N, S7 M
# wheel_up: when wheel is moved up 0 U; R5 q' N+ x7 H7 q7 f- n# wheel_down: when wheel is moved down " M' [8 ]$ n1 M# wheel: up/down if either of above 2 buttons are not assigned 5 C5 b) I% o' L' |+ _5 E' p" @' N' K2 e! I8 c8 h s$ t% b5 Z# s2 V
看看你的env里面有没有这个?