Python tkinter ask before close window shorts
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certainly! in this tutorial, we'll learn how to add a confirmation dialog when the user attempts to close a tkinter window. this is useful to prevent accidental closure of your application.
overview of tkinter window closing
when you create a tkinter application, the main window can be closed using the "x" button in the window's title bar. by default, this action immediately closes the window without any confirmation. however, we can intercept this event to prompt the user with a confirmation dialog asking whether they really want to close the application.
steps to implement confirmation before closing the window
1. **import required libraries**: we need `tkinter` for the gui and `messagebox` for showing the confirmation dialog.
2. **create the main application window**: initialize the tkinter window.
3. **define a function to handle closing**: this function will show a confirmation dialog.
4. **bind the window close event**: we will bind the closing event to our function.
5. **run the application**: keep the application running and wait for user interaction.
code example
here is a complete code example demonstrating these steps:
explanation of the code
1. **importing libraries**:
we import `tkinter` as `tk` for creating the gui and `messagebox` from `tkinter` to display the confirmation dialog.
2. **creating the main window**:
we create a main window (`root`) using `tk.tk()`, set its title and size.
3. **defining the `on_closing` function**:
this function uses `messagebox.askokcancel()` to show a dialog that asks the user if they really want to quit.
if the user clicks "ok", the application will close using `root.destroy()`. if the user clicks "cancel", the window remains open.
4. **binding the close event**:
`root.protocol("wm_delete_window", on_closing)` binds the window close button to our `on_closing` function.
5. **running the application**:
finally, we run the tkinter event loop using `root.mainloop( ...
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