Struct maia_wasm::pointer::PointerTracker

pub struct PointerTracker { /* private fields */ }

Pointer tracker.

A pointer tracker receives PointerEvent’s from the web browser, maintains state information about the pointers that are active, and generates PointerGesture’s.

Implementations

impl PointerTracker

pub fn new() -> PointerTracker

Creates a new pointer tracker.

pub fn on_pointer_down(&mut self, event: PointerEvent)

Handler for the pointer down event.

This function should be used as the handler for pointer down events.

pub fn on_pointer_up(&mut self, event: PointerEvent)

Handler for the pointer up event.

This function should be used as the handler for pointer up events.

pub fn on_pointer_move(&mut self, event: PointerEvent) -> Option<PointerGesture>

Handler for the pointer move event.

This functions should be used as the hanlder for pointer move events.

If the event produces a corresponding pointer gesture, it is returned.

pub fn has_active_pointers(&self) -> bool

Checks if there are any active pointers.

This function returns true if there are any active pointers currently. An active pointer is one for which a pointer down event has been received, and the corresponding pointer up event has not been received yet.

Trait Implementations

impl Default for PointerTracker

fn default() -> PointerTracker

Returns the “default value” for a type.