Tkinter彈出窗口帶有檢查按鈕，無法獲取檢查按鈕狀態

Question

我正在按主窗口上的按鈕制作一個彈出窗口。 彈出窗口中有許多檢查按鈕，我需要將檢查按鈕的狀態返回到主窗口，還需要使用全選和取消全選按鈕。 但是我在使用變量時出錯，無法將狀態傳遞回主窗口。

這是我編寫的程序：

import Tkinter
import tkMessageBox

top = Tkinter.Tk()
state=[[]]

def popup(x):

    def select_clear_states():
        global Vars, all_states
        states = all_states.get()

        if states == 0:
            for I in range(len(Vars)):
                Vars[I].set(0)
        if states == 1:
            for I in range(len(Vars)):
                Vars[I].set(1)

    Vars = []

    root = Tkinter.Tk()

    all_states = Tkinter.IntVar()
    select_all = Tkinter.Checkbutton(root, text = "select/deselect all",variable = all_states, command = select_clear_states)
    select_all.grid(row = 0, column = 0, padx = 5, pady = 1)

    for n in range(10):

        var = Tkinter.IntVar()
        Vars.append(var)
        checkbox = Tkinter.Checkbutton(root, text = n+1, variable= Vars[n])
        checkbox.grid(row = n+1, column = 0, padx = 5, pady = 1)

    root.mainloop()


A = Tkinter.Button(top, text ="Hello1",command=lambda: popup(1))
A.pack()

B = Tkinter.Button(top, text ="Hello2",command=lambda: popup(2))
B.pack()

C = Tkinter.Button(top, text ="Hello3",command=lambda: popup(3))
C.pack()

top.mainloop()

無法使用變量Vars all_state和state [[]]來獲取檢查按鈕的狀態。

Exception in Tkinter callback
  Traceback (most recent call last):
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 1536, in __call__
      return self.func(*args)
    File "C:\Users\Synapse\Documents\Neo\Tutorial\python_tutorial\button.py", line 11, in select_clear_states
      states = all_states.get()
  NameError: global name 'all_states' is not defined

我應該能夠使用全選/取消全選按鈕，並且還能夠將每個檢查按鈕的所有狀態返回到主窗口。

Answer 1

使用類的示例代碼。

它使用Toplevel()創建PopUp，因為Tkinter應該只有一個Tk()窗口。

而且它僅使用一個mainloop()因為更多的循環使變量值出現問題。

它可以創建不同數量的復選框。

它需要更多的工作-即。 返回值-但是現在您可以使用win.states來獲取所有復選框的狀態（或設置它們）。

import Tkinter as tk
import tkMessageBox

# --- classes --- (CamelCase names)

class PopUp(tk.Toplevel):

    def __init__(self, number=10):
        tk.Toplevel.__init__(self)

        # - global checkbox to set all "small" checkboxes -

        self.global_state = tk.BooleanVar()

        cb = tk.Checkbutton(self, text="select/deselect all",
                            variable=self.global_state,
                            command=self.select_clear_states)
        cb.grid(row=0, column=0, padx=5, pady=1)

        # - "small" checkboxes -

        self.states = []

        for n in range(1, number+1):
            var = tk.BooleanVar()
            cb = tk.Checkbutton(self, text=str(n), variable=var)
            cb.grid(row=n, column=0, padx=5, pady=1)
            self.states.append(var)


    def select_clear_states(self):
        # get global checkbox
        state = self.global_state.get()

        # set all "small" checkboxes
        for x in self.states:
            x.set(state)

# --- functions --- (lower_case names)

def popup(num):

    win = PopUp(num)
    #win.states[1].set(True)

# --- main --- (lower_case names)

root = tk.Tk()

b = tk.Button(root, text="5 checkboxes", command=lambda:popup(5))
b.pack()

b = tk.Button(root, text="10 checkboxes", command=lambda:popup(10))
b.pack()

b = tk.Button(root, text="3 checkboxes", command=lambda:popup(3))
b.pack()

root.mainloop()