@egjs/axes
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A module used to change the information of user action entered by various input devices such as touch screen or mouse into the logical virtual coordinates. You can easily create a UI that responds to user actions.
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<a href="../../index.html">All files</a> / <a href="index.html">src/eventInput</a> PointerEventInput.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/*
* Copyright (c) 2015 NAVER Corp.
* egjs projects are licensed under the MIT license
*/
import { InputEventType, ExtendedEvent } from "../types";
import { EventInput, SUPPORT_POINTER } from "./EventInput";
export class PointerEventInput extends EventInput {
public readonly start = SUPPORT_POINTER ? ["pointerdown"] : <span class="branch-1 cbranch-no" title="branch not covered" >["MSPointerDown"];</span>
public readonly move = SUPPORT_POINTER ? ["pointermove"] : <span class="branch-1 cbranch-no" title="branch not covered" >["MSPointerMove"];</span>
public readonly end = SUPPORT_POINTER
? ["pointerup", "pointercancel"]
: <span class="branch-1 cbranch-no" title="branch not covered" >["MSPointerUp", "MSPointerCancel"];</span>
// store first, recent inputs for each event id
private _firstInputs: PointerEvent[] = [];
private _recentInputs: PointerEvent[] = [];
public onEventStart(
event: InputEventType,
inputKey?: string[],
inputButton?: string[]
): ExtendedEvent {
const button = this._getButton(event);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!this._isValidEvent(event, inputKey, inputButton)) {
<span class="cstat-no" title="statement not covered" > return null;</span>
}
this._preventMouseButton(event, button);
this._updatePointerEvent(event as PointerEvent);
return this.extendEvent(event);
}
public onEventMove(
event: InputEventType,
inputKey?: string[],
inputButton?: string[]
): ExtendedEvent {
<span class="missing-if-branch" title="if path not taken" >I</span>if (!this._isValidEvent(event, inputKey, inputButton)) {
<span class="cstat-no" title="statement not covered" > return null;</span>
}
this._updatePointerEvent(event as PointerEvent);
return this.extendEvent(event);
}
public onEventEnd(event: InputEventType): void {
this._removePointerEvent(event as PointerEvent);
}
public onRelease(): void {
this.prevEvent = null;
this._firstInputs = [];
this._recentInputs = [];
return;
}
public getTouches(): number {
return this._recentInputs.length;
}
protected _getScale(): number {
<span class="missing-if-branch" title="else path not taken" >E</span>if (this._recentInputs.length !== 2) {
return null; // TODO: consider calculating non-pinch gesture scale
}
<span class="cstat-no" title="statement not covered" > return (</span>
this._getDistance(this._recentInputs[0], this._recentInputs[1]) /
this._getDistance(this._firstInputs[0], this._firstInputs[1])
);
}
protected _getCenter(event: PointerEvent): { x: number; y: number } {
return {
x: event.clientX,
y: event.clientY,
};
}
protected _getMovement(event: PointerEvent): { x: number; y: number } {
const prev = this.prevEvent.srcEvent as PointerEvent;
<span class="missing-if-branch" title="if path not taken" >I</span>if (event.pointerId !== prev.pointerId) {
<span class="cstat-no" title="statement not covered" > return {</span>
x: 0,
y: 0,
};
}
return {
x: event.clientX - prev.clientX,
y: event.clientY - prev.clientY,
};
}
private _updatePointerEvent(event: PointerEvent) {
let addFlag = false;
this._recentInputs.forEach((e, i) => {
<span class="missing-if-branch" title="else path not taken" >E</span>if (e.pointerId === event.pointerId) {
addFlag = true;
this._recentInputs[i] = event;
}
});
if (!addFlag) {
this._firstInputs.push(event);
this._recentInputs.push(event);
}
}
private _removePointerEvent(event?: PointerEvent) {
this._firstInputs = this._firstInputs.filter(
(x) => x.pointerId !== event.pointerId
);
this._recentInputs = this._recentInputs.filter(
(x) => x.pointerId !== event.pointerId
);
}
}
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