Close an easygui Python script with the standard 'close' button

Question

I've created a very simple app, which presents an easygui entrybox() and continues to loop this indefinitely as it receives user input.

I can quit the program using the Cancel button as this returns None, but I would also like to be able to use the standard 'close' button to quit the program. (ie. top right of a Windows window, top left of a Mac window) This button currently does nothing.

Taking a look at the easygui module I found this line:

root.protocol('WM_DELETE_WINDOW', denyWindowManagerClose )

This would seem to be the culprit. I'm no TKinter expert but I could probably work out how to alter this handler to act the way I want.

However, as I'd rather not mess about with the easygui module, Is there a way to override this behavior from my main script, and have the close button either close the program outright or return None?

Answer 1

I don't know right now, but have you tried something like this?:

root.protocol('WM_DELETE_WINDOW',  self.quit)

or

root.protocol('WM_DELETE_WINDOW',  self.destroy)

I haven't tried, but google something like "Tkinter protocol WM_DELETE_WINDOW"

Answer 2

It would require altering the easygui module, yes. I will get it modified!

** I have sent in a e-mail to the EasyGUI creator explaning this [12:12 PM, January 23/09]

** I just want to say that the possibility of this change happening - if at all, which I doubt - is very tiny. You see, EasyGUI is intended to be a simple, discrete way to create GUIs. I think that this addition wouldn't help any, especially since the interface is very sequential, so it would be confusing to new users. [12:19 PM, January 23/09]

** The EasyGUI creator said this in reply to my e-mail:

An easygui dialog should never exit the application -- it should pass back a value to the caller and let the caller decide what to do.

But this is an interesting idea. Rather than simply ignoring a click on the "close" icon, easygui boxes could return the same value that a click on the "cancel" button would return. I'll meditate on this.

-- Steve Ferg

I think that this is progress at least. [2:40 PM, January 23/09]