Struct PadTracker 

pub struct PadTracker { /* private fields */ }

Frame-to-frame tracker over an active-high 16-bit button mask (the PadState::buttons representation).

Implementations

impl PadTracker

pub const fn new() -> Self

A tracker with nothing held and nothing suppressed.

pub fn update(&mut self, buttons: u16)

Feed the current frame’s polled buttons. Call exactly once per polled frame, before any queries.

pub fn is_held(&self, mask: u16) -> bool

Any button in mask is currently held (and not suppressed).

pub fn just_pressed(&self, mask: u16) -> bool

Any button in mask went from released to held this frame.

pub fn just_released(&self, mask: u16) -> bool

Any button in mask went from held to released this frame.

pub fn repeats(&self, mask: u16, delay: u8, rate: u8) -> bool

Delay-then-rate auto-repeat for menu cursors: true on the initial press, again delay frames later, then every rate frames while held (PICO-8’s cadence is delay = 15, rate = 4). A rate of 0 is treated as 1 (every frame).

pub fn prime(&mut self)

Suppress every button held right now until it is released and pressed again. Call at a context handoff (launcher starts a game, pause menu closes) so a button held across the transition does not fire in the new context.

Trait Implementations

impl Clone for PadTracker

fn clone(&self) -> PadTracker

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for PadTracker

fn default() -> Self

Returns the “default value” for a type.

impl Copy for PadTracker