在 Mac OS X 中使用 Tkinter 和 Python 进行惯性滚动 [英] Inertial scrolling in Mac OS X with Tkinter and Python

问题描述

我正在开发一个使用 Tkinter 作为窗口管理器的 Python 3.3 项目.我为画布设置了鼠标滚轮事件.滚动在 Windows 7、8 和 Ubuntu 中有效，但在 Mac OS X Mountain Lion 中使用 Magic Mouse 滚动时，程序崩溃并在 Tk 主循环中出现以下错误:

I am working on a Python 3.3 project that uses Tkinter as a Window manager. I have mouse scroll wheel events set up for a canvas. The scrolling works in Windows 7, 8, and Ubuntu, but upon scrolling with a Magic Mouse in Mac OS X Mountain Lion, the program crashes with teh following error in the Tk main loop:

File "/Users/xxxx/Documents/Repositories/tycoon/agentsim.py", line 291, in start
    self._root.mainloop()
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/tkinter/__init__.py", line 1038, in mainloop
self.tk.mainloop(n)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 0: invalid continuation byte

我的代码是:

self._hscroll.configure( command=self._canvas.xview )
self._vscroll.configure( command=self._canvas.yview )
self._canvas.bind('<MouseWheel>', lambda event: self.rollWheel(event))

其中 hscroll 和 vscroll 是表单中的滚动条对象.

where hscroll and vscroll are scrollbar objects in the form.

如果我使用普通鼠标，则不会出现此问题.当我尝试使用触控板滚动时也会发生这种情况(开启惯性滚动)

If I use a regular mouse, the problem doesn't occur. It also occurs when I try scroll with my trackpad (with inertial scrolling turned on)

我是否必须更新 Tk 才能使此功能正常工作，还是只是整体损坏?

Do I have to update Tk to make this functionality work, or is it just broken in general?

推荐答案

可以捕获这些错误:

while True:
    try:
        root.mainloop()
        break
    except UnicodeDecodeError:
        pass

这似乎工作得很好，甚至可以惯性滚动，而且不需要任何安装/升级.

This seems to work perfectly, even scrolling inertially, and does not require any installation/upgrading.

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