Function bevy::input::common_conditions::input_just_pressed

source · 
pub fn input_just_pressed<T>(
    input: T
) -> impl FnMut(Res<'_, ButtonInput<T>>) + Clone
where
    T: Copy + Eq + Hash + Send + Sync + 'static,
Expand description

Run condition that is active if ButtonInput::just_pressed is true for the given input.

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Update, jump.run_if(input_just_pressed(KeyCode::Space)))
        .run();
}
Examples found in repository?
examples/time/virtual_time.rs (line 20)
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fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .add_systems(
            Update,
            (
                move_virtual_time_sprites,
                move_real_time_sprites,
                toggle_pause.run_if(input_just_pressed(KeyCode::Space)),
                change_time_speed::<1>.run_if(input_just_pressed(KeyCode::ArrowUp)),
                change_time_speed::<-1>.run_if(input_just_pressed(KeyCode::ArrowDown)),
                (update_virtual_time_info_text, update_real_time_info_text)
                    // update the texts on a timer to make them more readable
                    // `on_timer` run condition uses `Virtual` time meaning it's scaled
                    // and would result in the UI updating at different intervals based
                    // on `Time<Virtual>::relative_speed` and `Time<Virtual>::is_paused()`
                    .run_if(on_real_timer(Duration::from_millis(250))),
            ),
        )
        .run();
}
More examples
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examples/math/render_primitives.rs (line 25)
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fn main() {
    let mut app = App::new();

    app.add_plugins(DefaultPlugins)
        .init_state::<PrimitiveSelected>()
        .init_state::<CameraActive>();

    // cameras
    app.add_systems(Startup, (setup_cameras, setup_lights, setup_ambient_light))
        .add_systems(
            Update,
            (
                update_active_cameras.run_if(state_changed::<CameraActive>),
                switch_cameras.run_if(input_just_pressed(KeyCode::KeyC)),
            ),
        );

    // text

    // PostStartup since we need the cameras to exist
    app.add_systems(PostStartup, setup_text);
    app.add_systems(
        Update,
        (update_text.run_if(state_changed::<PrimitiveSelected>),),
    );

    // primitives
    app.add_systems(Startup, (spawn_primitive_2d, spawn_primitive_3d))
        .add_systems(
            Update,
            (
                switch_to_next_primitive.run_if(input_just_pressed(KeyCode::ArrowUp)),
                switch_to_previous_primitive.run_if(input_just_pressed(KeyCode::ArrowDown)),
                draw_gizmos_2d.run_if(in_mode(CameraActive::Dim2)),
                draw_gizmos_3d.run_if(in_mode(CameraActive::Dim3)),
                update_primitive_meshes.run_if(
                    state_changed::<PrimitiveSelected>.or_else(state_changed::<CameraActive>),
                ),
                rotate_primitive_2d_meshes,
                rotate_primitive_3d_meshes,
            ),
        );

    app.run();
}