暂停消息框 - Python

Question

我正在编写python脚本，其中我有用户GUI与删除帐户的按钮。当用户按下删除账户按钮后，会弹出一个消息框（我使用tkinter消息框，但其他选项也不错），要求他批准该任务。我想增加一个选项，让用户必须等待几秒后才点击 "确定"，如果你知道有什么方法可以实现这种可能性（不一定是tkinter），我真的很想知道。

Answer 1

通过使用基类 对话 的 tkinter.simpledialog 模块，我们可以创建任何自定义对话框。

这是我的做法。

from tkinter import *
import tkinter.simpledialog as sd


class WaitAlert(sd.Dialog):
    """An alert which will wait for a given time before user can interact.

    Args:
        parent: Takes the parent window instance.
        title (str): Main heading of the alert.
        message (str): Information to display.
        pause (int): Time till inactive. (in seconds)
        show_timer (boolean): Shows countdown."""

    def __init__(self, parent, title=None, message=None, pause=None, show_timer=False):
        self.message = message or ''
        self.pause = pause
        self.show_timer = show_timer
        super().__init__(parent, title=title)

    def body(self, master):
        # For macOS, we can use the below command to achieve a window similar to an alert.
        # Comment the below line if you are on windows.
        self.tk.call("::tk::unsupported::MacWindowStyle", "style", self._w, "moveableAlert")
        Label(master, text=self.message).pack()

    def _timer(self, count, b1, b2):
        "Timer function."
        if count > 0:
            if self.show_timer: b1['text'] = str(count)
            self.after(1000, self._timer, count-1, b1, b2)
        else:
            if self.show_timer: b1['text'] = "OK"
            b1['state'] = 'normal'
            b2['state'] = 'normal'

    def buttonbox(self):
        box = Frame(self)
        b1 = Button(box, text="OK", width=10, command=self.ok, default=ACTIVE, state='disabled')
        b1.pack(side=LEFT, padx=5, pady=5)
        b2 = Button(box, text="Cancel", width=10, command=self.cancel, state='disabled')
        b2.pack(side=LEFT, padx=5, pady=5)
        if self.pause is not None: 
            self._timer(self.pause, b1, b2)
        self.bind("<Return>", self.ok)
        self.bind("<Escape>", self.cancel)
        box.pack()

    def apply(self):
        self.result = True
        return super().apply()

---

现在你可以把这个类保存在一个单独的python文件中，然后通过导入它来使用。例如，我把它保存为 tkDialog.py 然后将其导入到你的主文件中(from tkDialog import WaitAlert)或 你可以把它放在你的主文件的开头。.

下面以一个小例子来说明如何使用它。

from tkinter import *
from tkDialog import WaitAlert

root = Tk()
# `wm_withdraw()` will hide the window from the screen.
root.wm_withdraw()
popup = WaitAlert(parent=root,
              title='Alert!', 
              message='Do you want to delete this account?', 
              pause=5,  # pauses for 5 secs.
              show_timer=True) # show countdown.
print(popup.result)   # get the result.
# If the user clicks "OK" the result will return "True" else return "None".

希望对你有所帮助。