Python：tkinter：创建自定义窗口提示

Question

我一直在非常努力地试图找出这个问题。在使用 tkinter 和 python 时，我可以使用什么方法来使用按钮返回函数的值？这是我当前的代码

def choice_message (message_title, message, choice_1, choice_2):
    new_window = Tk()
    new_window.minsize (400, 150)
    new_window.maxsize (400, 150)
    new_window.title (str (message_title))
    Label (new_window, text = message, font = "Arial", wrap = 380, anchor = NW).place (x = 10, y = 0, width = 400, height = 100)

    def yes ():
        new_window.destroy ()
        # Added code

    def no ():
        new_window.destroy ()
        # Added code (same as yes but returns false (??))

    Button (new_window, text = str (choice_1), font = "Arial", anchor = CENTER, command = yes).place (x = 90, y = 110, width = 100, height = 30)
    Button (new_window, text = str (choice_2), font = "Arial", anchor = CENTER, command = no).place (x = 210, y = 110, width = 100, height = 30)

# ....

if (choice_message ("Hello", "This is a message text", "True", "False") == True):
    print ("The Window Works...")

Answer 1

您将不得不以不同的方式构建它。

您可以创建一个具有self.result 的类，并且它必须使用wait_window()，因此它会等到您关闭窗口。然后你可以从self.result获得价值

你可以在你的choice_message中使用这个类：

import tkinter as tk

# --- classes ---
# you can put this class in separated file
# (it will need `import tkinter`)

import tkinter 

class MsgBox(tkinter.Toplevel):

    def __init__(self, title="MsgBox", message="Hello World", choice1="OK", choice2="Cancel"):
        tkinter.Toplevel.__init__(self)

        self.result = None

        self.choice1 = choice1
        self.choice2 = choice2

        self.title(title)

        self.label = tkinter.Label(self, text=message, bg='white')
        self.label.pack(ipadx=50, ipady=20)

        self.button = tkinter.Button(self, text=str(self.choice1), command=self.on_press_choice1)
        self.button.pack(side='left', ipadx=5, padx=10, pady=10)

        self.button = tkinter.Button(self, text=str(self.choice2), command=self.on_press_choice2)
        self.button.pack(side='right', ipadx=5, padx=10, pady=10)

        # don't return to main part till you close this MsgBox
        self.wait_window()

    def on_press_choice1(self):
        self.result = self.choice1
        self.destroy()

    def on_press_choice2(self):
        self.result = self.choice2
        self.destroy()

# --- functions ---

def choice_message(title, message, choice1, choice2):

    msg = MsgBox(title, message, choice1, choice2)
    # MsgBox is waiting till you close it
    return msg.result

def choose():
    if choice_message("Hello", "This is a message text", True, False) == True:
        print("You choose: True")
    else:
        print("You choose: False")

def about():
    msg = MsgBox()
    # MsgBox is waiting till you close window
    print("You choose:", msg.result)

def close():
    msg = MsgBox('Closing', 'Are you sure?', 'Yes', 'No')
    # MsgBox is waiting till you close window
    if msg.result == 'Yes':
        root.destroy()

# --- main ---

root = tk.Tk()

b = tk.Button(root, text="Choose", command=choose)
b.pack(fill='x', expand=True)

b = tk.Button(root, text="About", command=about)
b.pack(fill='x', expand=True)

b = tk.Button(root, text="Close", command=close)
b.pack(fill='x', expand=True)

root.mainloop()

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