在kivy中觸摸（單擊）matplotlib圖形會崩潰

Question

我構建了一個小圖形用GUI顯示一些帶有kivy的實時數據。

我加入了matplotlib圖在我的屏幕上做這個：

fig, ax = plt.subplots() 
plt.plot([1,2]) 

canvas = fig.canvas 
self.ids.screen.add_widget(canvas, 2) 

的GUI的其餘部分設計有.kv文件。一切工作正常，但如果我不小心碰的情節發生這種情況並沒有進一步的接觸是可能的：

[INFO ] [Base  ] Leaving application in progress... 
Traceback (most recent call last): 
    File "main.py", line 167, in <module> 
    TestApp().run() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/app.py", line 828, in run 
    runTouchApp() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/base.py", line 487, in runTouchApp 
    EventLoop.window.mainloop() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/core/window/window_egl_rpi.py", line 89, in mainloop 
    self._mainloop() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/core/window/window_egl_rpi.py", line 84, in _mainloop 
    EventLoop.idle() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/base.py", line 330, in idle 
    self.dispatch_input() 
    File "/usr/local/lib/python3.4/dist-packages/kivy/base.py", line 315, in dispatch_input 
    post_dispatch_input(*pop(0)) 
    File "/usr/local/lib/python3.4/dist-packages/kivy/base.py", line 221, in post_dispatch_input 
    listener.dispatch('on_motion', etype, me) 
    File "kivy/_event.pyx", line 718, in kivy._event.EventDispatcher.dispatch (/tmp/pip-a56bsdeu-build/kivy/_event.c:7726) 
    File "/usr/local/lib/python3.4/dist-packages/kivy/core/window/__init__.py", line 1070, in on_motion 
    self.dispatch('on_touch_down', me) 
    File "kivy/_event.pyx", line 718, in kivy._event.EventDispatcher.dispatch (/tmp/pip-a56bsdeu-build/kivy/_event.c:7726) 
    File "/usr/local/lib/python3.4/dist-packages/kivy/core/window/__init__.py", line 1086, in on_touch_down 
    if w.dispatch('on_touch_down', touch): 
    File "kivy/_event.pyx", line 718, in kivy._event.EventDispatcher.dispatch (/tmp/pip-a56bsdeu-build/kivy/_event.c:7726) 
    File "/usr/local/lib/python3.4/dist-packages/kivy/uix/widget.py", line 457, in on_touch_down 
    if child.dispatch('on_touch_down', touch): 
    File "kivy/_event.pyx", line 718, in kivy._event.EventDispatcher.dispatch (/tmp/pip-a56bsdeu-build/kivy/_event.c:7726) 
    File "/usr/local/lib/python3.4/dist-packages/kivy/uix/widget.py", line 457, in on_touch_down 
    if child.dispatch('on_touch_down', touch): 
    File "kivy/_event.pyx", line 718, in kivy._event.EventDispatcher.dispatch (/tmp/pip-a56bsdeu-build/kivy/_event.c:7726) 
    File "/home/sysop/.kivy/garden/garden.matplotlib/backend_kivy.py", line 1067, in on_touch_down 
    if(touch.button == "scrollup" or touch.button == "scrolldown"): 
AttributeError: 'MTDMotionEvent' object has no attribute 'button' 

什麼是避免這種情況的最好方法是什麼？

Answer 1

我已解決。我在圖形類補充說：

def on_touch_down(self, touch): 
    print " touch" 

https://github.com/kivy/kivy/issues/4845