Tkinter SimpleDialog右键菜单调用无响应问题求助

• 右键菜单弹出时，Tkinter会自动为菜单设置事件抓取（grab），确保菜单是当前唯一可交互的组件。你在make_popup的finally块中调用grab_release()的时机过早，此时菜单的抓取状态尚未完全解除。当点击菜单中的"do test"命令时，菜单的抓取锁还未彻底释放，SimpleDialog尝试获取自身的抓取锁时会引发冲突，最终导致程序冻结。
• 右键菜单的"dummy test"命令存在语法问题：command = print('This one works OK')会在添加菜单命令时立即执行print语句，而非点击菜单项时触发，不符合预期。

核心思路是确保菜单的抓取锁完全释放后，再弹出SimpleDialog，同时修正菜单命令的写法。以下提供两种可行方案：

方案一：延迟调用对话框 #

通过after()方法延迟一小段时间执行do_test，给菜单足够时间释放抓取锁：

1. 修改Controller类中"do test"命令的绑定代码：

view.popup.add_command(label='do test', command=lambda: view.after(100, self.do_test, None, view))

2. 修正"dummy test"命令的写法：

view.popup.add_command(label='dummy test', command=lambda: print('This one works OK'))

方案二：正确处理菜单抓取生命周期 #

调整make_popup方法，让菜单在失去焦点时再释放抓取锁：
修改View类的make_popup方法：

def make_popup(self, event):
    self.popup.tk_popup(event.x_root + 15, event.y_root, 0)
    # 绑定菜单隐藏事件，此时再释放抓取锁
    self.popup.bind("<Unmap>", lambda e: self.popup.grab_release(), add="+")

同时按方案一的方式修正"dummy test"命令。

from tkinter import simpledialog as s
import tkinter as tk

class View(tk.Frame):
    def __init__(self, root):
        tk.Frame.__init__(self)       
        self.grid(row=0, column=0, sticky='nsew')
        self.configure(bg = 'blue')
        self.popup = tk.Menu(self, tearoff=0)
        self.bind("<Button-2>", self.make_popup) #right-click to show popup 
        self.button = tk.Button(self, text='Test')
        self.button.grid()             
    def make_popup(self, event):
        try:
            self.popup.tk_popup(event.x_root + 15, event.y_root, 0)
        finally:
            self.popup.grab_release()            
        
class Controller():
    def __init__(self, view):
        # 延迟调用避免抓取冲突
        view.popup.add_command(label='do test', command=lambda: view.after(100, self.do_test, None, view))  
        # 用lambda包裹print，确保点击时执行
        view.popup.add_command(label='dummy test', command=lambda: print('This one works OK')) 
        view.button.bind("<Button-1>",  lambda e, : self.do_test(e, view))        
    def do_test(self, event, view):
        d = s.SimpleDialog(view,
                     text="This is a test dialog.  "
                          "Would this have been an actual dialog, "
                          "the buttons below would have been glowing "
                          "in soft pink light.\n"
                          "Do you believe this?",
                     buttons=["Yes", "No", "Cancel"],
                     default=0,
                     cancel=2,
                     title="Test Dialog")      
        print(d.go())
        
class App(tk.Tk):
    def __init__(self):
        super().__init__()
        self.geometry('200x100')  
        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)    
        view = View(self)
        controller = Controller(view)

if __name__ == "__main__":  
    app = App()         
    app.mainloop()   

内容的提问来源于stack exchange，提问作者user10850186