Struct ButtonDevice 

pub struct ButtonDevice { /* private fields */ }

LPAR-04 §8 Button input device adapter.

Maps each configured hardware button to a screen point. A button press synthesizes PointerDown at the mapped point; a button release synthesizes PointerUp. Both are fed through an owned PointerDevice so the full recognizer chain applies — no new Event variants are introduced.

Two ButtonDevices do not share recognizer state (per-device-instance rule, §8.4).

Implementations

impl ButtonDevice

pub fn new(frame_hz: u32, mappings: Vec<ButtonMapping>) -> Self

Create a button device with the given button→point mappings and frame rate.

frame_hz is forwarded to the owned PointerDevice for threshold conversion.

pub fn button_down( &mut self, root: &mut ObjectNode, button_id: u32, ) -> Disposition

Process a button press: synthesize PointerDown at the mapped point and feed it through the pointer device.

Returns Disposition::NoTarget if button_id is not registered.

pub fn button_up( &mut self, root: &mut ObjectNode, button_id: u32, ) -> Disposition

Process a button release: synthesize PointerUp at the mapped point and feed it through the pointer device.

Returns Disposition::NoTarget if button_id is not registered.

pub fn tick(&mut self, root: &mut ObjectNode) -> Disposition

Advance the owned pointer device’s timers one tick.

Drives long-press and double-tap timers for button contacts.