tkinter 中的 Python 3 unicode 编解码器错误绑定鼠标滚轮 [英] Python 3 unicode codec error binding mousewheel in tkinter
问题描述
在 MacOS 上使用 Python 3.6/tkinter，我在画布中创建了一个框架并将滚动条绑定到它.这一切正常.问题是当我尝试在光标位于可滚动框架中时捕获 MouseWheel 事件时.我设置了一个绑定:
Using Python 3.6/tkinter on MacOS, I created a frame within a canvas and bound a scrollbar to it. This all works fine. The problem is when I try to snag MouseWheel events when the cursor is in the scrollable frame. I set up a binding:
main_window.bind("<MouseWheel>",on_mousewheel)
并创建了一个简短的虚拟事件处理程序:
and created a short dummy event handler:
def on_mousewheel(event):
print(event.delta)
每次我使用滚轮时，Python 都会响应:
Every time I use the scroll wheel, Python responds with:
Traceback (most recent call last):
File "/Users/Gary/IPPS/opendb.py", line 160, in <module>
main_window.mainloop()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/tkinter/__init__.py", line 1277, in mainloop
self.tk.mainloop(n)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte
代码如下:
from tkinter import *
def on_main_window_resize(event):
canvas.configure(scrollregion=canvas.bbox('all'))
def on_mousewheel(event):
print(event.delta)
main_window = Tk()
main_window.bind("<MouseWheel>",on_mousewheel)
canvas = Canvas(main_window, width=500, height=500)
canvas.pack(side=LEFT, fill=BOTH, expand=YES)
cust_scroll = Scrollbar(main_window, orient=VERTICAL, command=canvas.yview)
cust_scroll.pack(side=RIGHT, fill=Y, expand=NO)
cust_list = Frame(canvas)
canvas['yscrollcommand'] = cust_scroll.set
canvas.bind('<Configure>', on_main_window_resize)
canvas.create_window((0,0), window=cust_list, anchor=NW)
main_window.grid_columnconfigure(0, weight=1)
main_window.grid_rowconfigure(0, weight=1)
memberbuttons = list();
for member in range(1,20):
memberbutton = Button(cust_list, text="BUTTON", justify=LEFT, pady=2)
memberbutton.pack(side=TOP, fill=X)
main_window.mainloop()
有什么想法吗?
推荐答案
我在网上找到了一些有用的参考资料来掌握问题，它似乎发生在旧版本的 ActiveTcl (8.5.x) 上.
I found some references online useful to grasp the problem, it seems to happen on an older version of ActiveTcl (8.5.x).
Github 上的 nltk/nltk - OS X:当鼠标滚轮在 Python 3 中时下载器 GUI 崩溃用于滚动
解决方案是将ActiveTlc版本升级到>=8.6，你可以这样做两种方式:
The solution is to upgrade your version of ActiveTlc to >=8.6 and you can do this in two ways:
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