为什么 Tkinter.TopLevel.wm_geometry() 返回“1x1+0+0"? [英] Why does Tkinter.TopLevel.wm_geometry() return "1x1+0+0"?

问题描述

我有一个 Tkinter 根窗口和一个 tk.Toplevel.当我在根窗口和顶层调用 .wm_geometry() 时，它们都返回字符串 1x1+0+0，即使我的窗口在屏幕上可见.

I have a Tkinter root window and a tk.Toplevel. When I call .wm_geometry() on the root window and on the Toplevel, they both return the string 1x1+0+0, even when my windows are visible on the screen.

我的代码的精简版本是:

A condensed version of my code is:

root = tk.Tk()
root.withdraw()
window = tk.Toplevel(root)
window.withdraw()
# add things to this window
root.after(0, execute_next_instruction)
root.mainloop()

def execute_next_instruction():  
    window.wm_geometry()  # "1x1+0+0"

推荐答案

原来是因为我使用了tk.Tk.after(0, execute_next_instruction)，所以调用获取窗口几何在窗口准备好之前，信息仍在执行.修复方法是使用 tk.Tk.after(1, execute_next_instruction).

It turns out that because I was using tk.Tk.after(0, execute_next_instruction), the calls to get the window geometry information were still executing before the window was ready. The fix was to use tk.Tk.after(1, execute_next_instruction).

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