Tkinter GUI Application Development Blueprints

Events and callbacks – adding life to programs

Now that you have learned how to add widgets to a screen and position them where you want, let's turn our attention to the third component of GUI programming.

This addresses the question of how to make widgets functional.

Making widgets functional involves making them responsive to events such as the pressing of buttons, the pressing of keys on a keyboard, mouse clicks, and the like. This requires associating callbacks with specific events.

Callbacks are normally associated with specific widget events using the command binding rules, which is discussed in the following section.

Command binding

The simplest way to add functionality to a button is called command binding, whereby a callback function is mentioned ...