def processWheel(event):
global vbar, canvas, step
if event.delta > 0:
# 滚轮往上滚动，放大
canvas.yview_scroll(step, 'units')
else:
canvas.yview_scroll(step, 'units')
# 滚轮往下滚动，缩小
canvas.bind("<MouseWheel>", processWheel)
标签：processWheel,canvas,tkinter,鼠标,滚轮,yview,滚动条,step,滚动 From： https://www.cnblogs.com/lld76/p/17389455.html