如何在 Tkinter 中强制注意弹出窗口

Posted 2023-02-16

【中文标题】如何在 Tkinter 中强制注意弹出窗口

【英文标题】：How to make pop-up window with force attention in Tkinter

【发布时间】：2020-08-15 14:38:14

【问题描述】：

我想创建一个在您输入之前不允许用户访问其他窗口的窗口。 我试过win.attribute("ontop", True)，但它允许用户访问其他窗口。 或者在 Tkinter python 3.8 中有没有像 force_focus_lock() 这样的函数，它不允许其他窗口 在您输入或关闭当前窗口之前获得焦点。

【问题讨论】：

见How to create a modal dialog in tkinter?。

我更新了我的答案，提供了更多可能性和更彻底的实施。

【参考方案1】：

我相信以下是您正在尝试做的事情。用 cmets 给出解释。

方法#1： (PopOut1)

您仍然可以移动主窗口 如果主窗口上有鼠标释放，新窗口将获得焦点

方法 #2： (PopOut2)

主窗口被锁定 如果在主窗口上释放鼠标，新窗口将呈现焦点、闪烁和“叮”声

---

import tkinter as tk


#first method
class PopOut1(tk.Toplevel):
    def __init__(self, master, **kwargs):
        tk.Toplevel.__init__(self, master, **kwargs)
        self.geometry('400x300')

        #set focus to this window
        self.focus_set()
        
        #releasing on any other tkinter window, within this process, forces focus back to this window
        self.grab_set()


#second method
class PopOut2(tk.Toplevel):
    def __init__(self, master, **kwargs):
        tk.Toplevel.__init__(self, master, **kwargs)
        self.geometry('400x300')
        
        #set focus to this window
        self.focus_set()

        #disable the main window
        master.attributes('-disabled', True)

        #so this window can't end up behind the disabled window
        #only necessary if this window is not transient
        #self.attributes('-topmost', True)

        #capture close event
        self.protocol("WM_DELETE_WINDOW", self.close)

    #event=None ~ in case you also want to bind this to something
    def close(self, event=None):
        #re-enable the main window
        self.master.attributes('-disabled', False)
        #destroy this window
        self.destroy()


class App(tk.Tk):
    TITLE = 'Application'
    WIDTH, HEIGHT, X, Y = 800, 600, 50, 50

    def __init__(self):
        tk.Tk.__init__(self)
        tk.Button(self, text="open popout 1", command=self.open1).grid()
        tk.Button(self, text="open popout 2", command=self.open2).grid()

    def open1(self):
        PopOut1(self)

    def open2(self):
        #.transient(self) ~ 
        #    flash PopOut if focus is attempted on main
        #    automatically drawn above parent
        #    will not appear in taskbar
        PopOut2(self).transient(self)


if __name__ == '__main__':
    app = App()
    app.title(App.TITLE)
    app.geometry(f'App.WIDTHxApp.HEIGHT+App.X+App.Y')
    #app.resizable(width=False, height=False)
    app.mainloop()