Struct PointerOverPreProcessor 

pub struct PointerOverPreProcessor { /* private fields */ }

Tracks which element the pointer is over for one input root, raising the pointer entered and exited events as it changes.

It observes the raw input of the input manager (subscribe it to IInputManager::pre_process) and is told by its host when the scene changed under a resting pointer.

Implementations

impl PointerOverPreProcessor

pub fn new(input_root: Rc<dyn IInputRoot>) -> Self

Creates the pre-processor for an input root.

pub fn last_position(&self) -> Option<PixelPoint>

The last known position of the pointer, in screen coordinates.

pub fn scene_invalidated(&self, dirty_rect: Rect)

Called by the host when the part of the scene within dirty_rect changed: re-evaluates which element a resting pointer is over.

Trait Implementations

impl IObserver<Rc<dyn IRawInputEventArgs>> for PointerOverPreProcessor

fn on_next(&self, value: Rc<dyn IRawInputEventArgs>)

fn on_completed(&self)

fn on_error(&self, _error: Rc<dyn Error>)