Button

The Button widget is probably one of the most essential things in all of the UI making world.

They have an on_pressed callback that is called when the button is pressed.

Buttons can be used like this:

Button::new(
    Text::new("Increase".to_string())
).with_on_pressed(
    MaybeSignal::signal(
        context.use_signal(
            EvalSignal::new(move || {
                println!("Pressed");
                Update::DRAW
            })
        )
    ),
)

For a more complex example, see the counter example.