No able to receive window close button event

[rameshgandhim]

For Example :

def on_close():
print ("Closed application")

root = tkinter.Tk()
root.protocol("WM_DELETE_WINDOW", on_close)
app = Application(root)
app.run()

Not sure how to catch window close event.
It will be helpful if anyone can suggest me on this.

(Big thanks for pygubu ☺️ )

[alejandroautalan]

Hello rameshgandhim,

To close the window you need to call the destroy method in the toplevel widget.
I have just created a wiki page to show how is done.

https://github.com/alejandroautalan/pygubu/wiki/CapturingDeleteWindowEvent

Thanks for trying pygubu.
Regards.

[rameshgandhim]

Thanks alejandro!!

It seems like i was doing

if __name__ == '__main__':
    root = tk.Tk()
    app = Application(root)
    app.run()

It works if i change app.run() to root.mainloop() to :

if __name__ == '__main__':
    root = tk.Tk()
    app = Application(root)
    root.mainloop()