Struct ButtonState 

pub struct ButtonState<T: Eq + Hash + Copy> { /* private fields */ }

Generic button state tracker. Tracks current, just-pressed, and just-released states. T is a key/button identifier (e.g., VirtualKey, MouseButton).

Usage: call press()/release() when events arrive, query pressed()/just_pressed()/ just_released(), then call clear_just() at end of frame.

Implementations

impl<T: Eq + Hash + Copy> ButtonState<T>

pub fn new() -> Self

pub fn press(&mut self, button: T)

Register a button press. Sets pressed + just_pressed.

pub fn release(&mut self, button: T)

Register a button release. Clears pressed, sets just_released.

pub fn pressed(&self, button: T) -> bool

Whether the button is currently held down.

pub fn just_pressed(&self, button: T) -> bool

Whether the button was pressed this frame.

pub fn just_released(&self, button: T) -> bool

Whether the button was released this frame.

pub fn clear_just(&mut self)

Clear just_pressed and just_released. Call at end of frame.

pub fn reset(&mut self)

Reset all state.

pub fn get_pressed(&self) -> impl Iterator<Item = &T>

All currently pressed buttons.

pub fn get_just_pressed(&self) -> impl Iterator<Item = &T>

All buttons just pressed this frame.

pub fn get_just_released(&self) -> impl Iterator<Item = &T>

All buttons just released this frame.

pub fn pressed_count(&self) -> usize

Number of currently pressed buttons.

pub fn any_pressed(&self) -> bool

Whether any button is pressed.

pub fn any_just_pressed(&self) -> bool

Whether any button was just pressed this frame.

Trait Implementations

impl<T: Eq + Hash + Copy> Default for ButtonState<T>

fn default() -> Self

Returns the “default value” for a type.