js-draw
Version:
Draw pictures using a pen, touchscreen, or mouse! JS-draw is a drawing library for JavaScript and TypeScript.
24 lines (23 loc) • 879 B
TypeScript
import { InputEvt } from '../../inputEvents';
type OnEventCallback = (event: InputEvt) => boolean;
export interface InputEventListener {
onEvent: OnEventCallback;
}
/**
* Accepts input events and emits input events.
*/
export default abstract class InputMapper implements InputEventListener {
#private;
constructor();
setEmitListener(listener: InputEventListener | OnEventCallback | null): void;
protected emit(event: InputEvt): boolean;
/**
* @returns true if the given `event` should be considered "handled" by the app and thus not
* forwarded to other targets. For example, returning "true" for a touchpad pinch event prevents
* the pinch event from zooming the webpage.
*
* Generally, this should return the result of calling `this.emit` with some event.
*/
abstract onEvent(event: InputEvt): boolean;
}
export {};