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import * as React from 'react';
import { action } from 'mobx';
import { InteractionUtils } from '../util/InteractionUtils';
const HOLD_DURATION = 1000;
export abstract class Touchable<T = {}> extends React.Component<React.PropsWithChildren<T>> {
//private holdTimer: NodeJS.Timeout | undefined;
private moveDisposer?: InteractionUtils.MultiTouchEventDisposer;
private endDisposer?: InteractionUtils.MultiTouchEventDisposer;
private holdMoveDisposer?: InteractionUtils.MultiTouchEventDisposer;
private holdEndDisposer?: InteractionUtils.MultiTouchEventDisposer;
protected abstract _multiTouchDisposer?: InteractionUtils.MultiTouchEventDisposer;
protected _touchDrag: boolean = false;
protected prevPoints: Map<number, React.Touch> = new Map<number, React.Touch>();
public FirstX: number = 0;
public FirstY: number = 0;
public SecondX: number = 0;
public SecondY: number = 0;
/**
* When a touch even starts, we keep track of each touch that is associated with that event
*/
@action
protected onTouchStart = (e: Event, me: InteractionUtils.MultiTouchEvent<React.TouchEvent>): void => {
const actualPts: React.Touch[] = [];
const te = me.touchEvent;
// loop through all touches on screen
for (const pt of me.touches) {
actualPts.push(pt);
if (this.prevPoints.has(pt.identifier)) {
this.prevPoints.set(pt.identifier, pt);
}
// only add the ones that are targeted on "this" element, but with the identifier that the screen touch gives
for (const tPt of me.changedTouches) {
if (pt.clientX === tPt.clientX && pt.clientY === tPt.clientY) {
// pen is also a touch, but with a radius of 0.5 (at least with the surface pens)
// and this seems to be the only way of differentiating pen and touch on touch events
if ((pt as any).radiusX > 1 && (pt as any).radiusY > 1) {
this.prevPoints.set(pt.identifier, pt);
}
}
}
}
const ptsToDelete: number[] = [];
this.prevPoints.forEach(pt => {
if (!actualPts.includes(pt)) {
ptsToDelete.push(pt.identifier);
}
});
ptsToDelete.forEach(pt => this.prevPoints.delete(pt));
if (this.prevPoints.size) {
switch (this.prevPoints.size) {
case 1:
this.handle1PointerDown(te, me);
te.persist();
// -- code for radial menu --
// if (this.holdTimer) {
// clearTimeout(this.holdTimer)
// this.holdTimer = undefined;
// }
break;
case 2:
this.handle2PointersDown(te, me);
break;
}
}
};
/**
* Handle touch move event
*/
@action
protected onTouch = (e: Event, me: InteractionUtils.MultiTouchEvent<TouchEvent>): void => {
const te = me.touchEvent;
const myTouches = InteractionUtils.GetMyTargetTouches(me, this.prevPoints, true);
// if we're not actually moving a lot, don't consider it as dragging yet
if (!InteractionUtils.IsDragging(this.prevPoints, myTouches, 5) && !this._touchDrag) return;
this._touchDrag = true;
switch (myTouches.length) {
case 1:
this.handle1PointerMove(te, me);
break;
case 2:
this.handle2PointersMove(te, me);
break;
}
for (const pt of me.touches) {
if (pt && this.prevPoints.has(pt.identifier)) {
this.prevPoints.set(pt.identifier, pt);
}
}
};
@action
protected onTouchEnd = (e: Event, me: InteractionUtils.MultiTouchEvent<TouchEvent>): void => {
// remove all the touches associated with the event
const te = me.touchEvent;
for (const pt of me.changedTouches) {
if (pt) {
if (this.prevPoints.has(pt.identifier)) {
this.prevPoints.delete(pt.identifier);
}
}
}
this._touchDrag = false;
te.stopPropagation();
// if (e.targetTouches.length === 0) {
// this.prevPoints.clear();
// }
if (this.prevPoints.size === 0) {
this.cleanUpInteractions();
}
e.stopPropagation();
};
cleanUpInteractions = (): void => {
this.removeMoveListeners();
this.removeEndListeners();
};
handle1PointerMove = (e: TouchEvent, me: InteractionUtils.MultiTouchEvent<TouchEvent>): any => {
e.stopPropagation();
e.preventDefault();
};
handle2PointersMove = (e: TouchEvent, me: InteractionUtils.MultiTouchEvent<TouchEvent>): any => {
e.stopPropagation();
e.preventDefault();
};
handle1PointerDown = (e: React.TouchEvent, me: InteractionUtils.MultiTouchEvent<React.TouchEvent>): any => {
this.removeMoveListeners();
this.addMoveListeners();
this.removeEndListeners();
this.addEndListeners();
};
handle2PointersDown = (e: React.TouchEvent, me: InteractionUtils.MultiTouchEvent<React.TouchEvent>): any => {
this.removeMoveListeners();
this.addMoveListeners();
this.removeEndListeners();
this.addEndListeners();
};
handle1PointerHoldStart = (e: Event, me: InteractionUtils.MultiTouchEvent<React.TouchEvent>): any => {
e.stopPropagation();
me.touchEvent.stopPropagation();
this.removeMoveListeners();
this.removeEndListeners();
this.removeHoldMoveListeners();
this.removeHoldEndListeners();
this.addHoldMoveListeners();
this.addHoldEndListeners();
};
addMoveListeners = () => {
const handler = (e: Event) => this.onTouch(e, (e as CustomEvent<InteractionUtils.MultiTouchEvent<TouchEvent>>).detail);
document.addEventListener('dashOnTouchMove', handler);
this.moveDisposer = () => document.removeEventListener('dashOnTouchMove', handler);
};
addEndListeners = () => {
const handler = (e: Event) => this.onTouchEnd(e, (e as CustomEvent<InteractionUtils.MultiTouchEvent<TouchEvent>>).detail);
document.addEventListener('dashOnTouchEnd', handler);
this.endDisposer = () => document.removeEventListener('dashOnTouchEnd', handler);
};
addHoldMoveListeners = () => {
const handler = (e: Event) => this.handle1PointerHoldMove(e, (e as CustomEvent<InteractionUtils.MultiTouchEvent<TouchEvent>>).detail);
document.addEventListener('dashOnTouchHoldMove', handler);
this.holdMoveDisposer = () => document.removeEventListener('dashOnTouchHoldMove', handler);
};
addHoldEndListeners = () => {
const handler = (e: Event) => this.handle1PointerHoldEnd(e, (e as CustomEvent<InteractionUtils.MultiTouchEvent<TouchEvent>>).detail);
document.addEventListener('dashOnTouchHoldEnd', handler);
this.holdEndDisposer = () => document.removeEventListener('dashOnTouchHoldEnd', handler);
};
removeMoveListeners = () => this.moveDisposer?.();
removeEndListeners = () => this.endDisposer?.();
removeHoldMoveListeners = () => this.holdMoveDisposer?.();
removeHoldEndListeners = () => this.holdEndDisposer?.();
handle1PointerHoldMove = (e: Event, me: InteractionUtils.MultiTouchEvent<TouchEvent>): void => {
// e.stopPropagation();
// me.touchEvent.stopPropagation();
};
handle1PointerHoldEnd = (e: Event, me: InteractionUtils.MultiTouchEvent<TouchEvent>): void => {
e.stopPropagation();
me.touchEvent.stopPropagation();
this.removeHoldMoveListeners();
this.removeHoldEndListeners();
me.touchEvent.stopPropagation();
me.touchEvent.preventDefault();
};
handleHandDown = (e: React.TouchEvent) => {
// e.stopPropagation();
// e.preventDefault();
};
}
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