我希望NewWinButton
一次只创建一个新窗口,这意味着
if NewWin.winfo_exists() == 1:
NewWinButton.config(state='disabled')
else:
NewWinButton.config(state='normal')
如果我在新窗口中添加一个按钮(在此示例中为QuitButton
),我可以完成这项工作:
import tkinter as tk
root = tk.Tk()
root.title('Main Window')
root.geometry('400x400')
def get_new_win():
NewWin = tk.Toplevel(root)
NewWin.title('New Window')
NewWin.geometry('300x300')
NewWinButton.config(state='disable')
def quit_win():
NewWin.destroy()
NewWinButton.config(state='normal')
QuitButton = tk.Button(NewWin,text='Quit', command=quit_win).pack()
NewWinButton = tk.Button(root,text='New Window', get_new_win).pack()
root.mainloop()
当且仅当我使用QuitButton
关闭新窗口时才有效;但是,如果我在新窗口中使用关闭按钮,则NewWinButton将保持“禁用”状态。
有谁能告诉我如何解决这个问题?
答案 0 :(得分:6)
使用NewWin.protocol("WM_DELETE_WINDOW", quit_win)
将功能quit_win
分配给关闭按钮。
import tkinter as tk
root = tk.Tk()
root.title('Main Window')
root.geometry('400x400')
def get_new_win():
NewWin = tk.Toplevel(root)
NewWin.title('New Window')
NewWin.geometry('300x300')
NewWinButton.config(state='disable')
def quit_win():
NewWin.destroy()
NewWinButton.config(state='normal')
QuitButton = tk.Button(NewWin, text='Quit', command=quit_win)
QuitButton.pack()
NewWin.protocol("WM_DELETE_WINDOW", quit_win)
NewWinButton = tk.Button(root, text='New Window', command=get_new_win)
NewWinButton.pack()
root.mainloop()
顺便说一句:
pack()
方法返回None
,而非按钮实例:
NewWinButton = tk.Button(...).pack()
使用它:
NewWinButton = tk.Button(...)
NewWinButton.pack()