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feat(input): add single touch handling
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--- | ||
"@tedengine/ted": minor | ||
--- | ||
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Add basic touch handling |
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import { vec2 } from 'gl-matrix'; | ||
import type TEventQueue from '../core/event-queue'; | ||
import type { | ||
TMouseLocation, | ||
TTouchCancelEvent, | ||
TTouchEndEvent, | ||
TTouchMoveEvent, | ||
TTouchStartEvent, | ||
} from './events'; | ||
import { TEventTypesInput } from './events'; | ||
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export default class TMouse { | ||
private touchMoveListener: (e: TouchEvent) => void; | ||
private touchStartListener: (e: TouchEvent) => void; | ||
private touchEndListener: (e: TouchEvent) => void; | ||
private touchCancelListener: (e: TouchEvent) => void; | ||
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constructor( | ||
eventQueue: TEventQueue, | ||
private canvas: HTMLCanvasElement, | ||
) { | ||
this.touchMoveListener = (e) => this.handleTouchMove(e, eventQueue); | ||
this.touchMoveListener = this.touchMoveListener.bind(this); | ||
window.addEventListener('touchmove', this.touchMoveListener); | ||
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this.touchStartListener = (e) => this.handleTouchStart(e, eventQueue); | ||
this.touchStartListener = this.touchStartListener.bind(this); | ||
this.canvas.addEventListener('touchstart', this.touchStartListener); | ||
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this.touchEndListener = (e) => this.handleTouchEnd(e, eventQueue); | ||
this.touchEndListener = this.touchEndListener.bind(this); | ||
this.canvas.addEventListener('touchend', this.touchEndListener); | ||
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this.touchCancelListener = (e) => this.handleTouchCancel(e, eventQueue); | ||
this.touchCancelListener = this.touchCancelListener.bind(this); | ||
window.addEventListener('touchcancel', this.touchCancelListener); | ||
} | ||
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public destroy() { | ||
window.removeEventListener('touchmove', this.touchMoveListener); | ||
window.removeEventListener('touchcancel', this.touchCancelListener); | ||
this.canvas.removeEventListener('touchstart', this.touchStartListener); | ||
this.canvas.removeEventListener('touchend', this.touchEndListener); | ||
} | ||
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private handleTouchMove(e: TouchEvent, eventQueue: TEventQueue) { | ||
const event: TTouchMoveEvent = { | ||
type: TEventTypesInput.TouchMove, | ||
...this.getTouchLocation(e), | ||
}; | ||
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eventQueue.broadcast(event); | ||
} | ||
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private handleTouchStart(e: TouchEvent, eventQueue: TEventQueue) { | ||
const event: TTouchStartEvent = { | ||
type: TEventTypesInput.TouchStart, | ||
...this.getTouchLocation(e), | ||
}; | ||
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eventQueue.broadcast(event); | ||
} | ||
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private handleTouchEnd(e: TouchEvent, eventQueue: TEventQueue) { | ||
const event: TTouchEndEvent = { | ||
type: TEventTypesInput.TouchEnd, | ||
...this.getTouchLocation(e), | ||
}; | ||
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eventQueue.broadcast(event); | ||
} | ||
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private handleTouchCancel(e: TouchEvent, eventQueue: TEventQueue) { | ||
const event: TTouchCancelEvent = { | ||
type: TEventTypesInput.TouchCancel, | ||
...this.getTouchLocation(e), | ||
}; | ||
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eventQueue.broadcast(event); | ||
} | ||
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private getTouchLocation(e: TouchEvent) { | ||
const offset = this.canvas.getBoundingClientRect(); | ||
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const touch = e.touches[0]; | ||
const result: TMouseLocation = { | ||
client: vec2.fromValues(touch.clientX, touch.clientY), | ||
screen: vec2.fromValues( | ||
touch.clientX - offset.left, | ||
touch.clientY - offset.top, | ||
), | ||
clip: vec2.fromValues( | ||
((touch.clientX - offset.left) / this.canvas.clientWidth) * 2 - 1, | ||
((touch.clientY - offset.top) / this.canvas.clientHeight) * -2 + 1, | ||
), | ||
}; | ||
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return result; | ||
} | ||
} |