@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> TouchMouseEventInput.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 { MOUSE_BUTTON_CODE_MAP } from "../const";
import { EventInput } from "./EventInput";
export class TouchMouseEventInput extends EventInput {
public readonly start = ["mousedown", "touchstart"];
public readonly move = ["mousemove", "touchmove"];
public readonly end = ["mouseup", "touchend", "touchcancel"];
private _baseTouches: TouchList;
public onEventStart(
event: InputEventType,
inputKey?: string[],
inputButton?: string[]
): ExtendedEvent {
const button = this._getButton(event);
if (this._isTouchEvent(event)) {
this._baseTouches = event.touches;
}
if (!this._isValidEvent(event, inputKey, inputButton)) {
return null;
}
this._preventMouseButton(event, button);
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>
}
return this.extendEvent(event);
}
public onEventEnd(event: InputEventType): void {
if (this._isTouchEvent(event)) {
this._baseTouches = event.touches;
}
return;
}
public onRelease(): void {
this.prevEvent = null;
this._baseTouches = null;
return;
}
public getTouches(event: InputEventType, inputButton?: string[]): number {
if (this._isTouchEvent(event)) {
return event.touches.length;
} else {
return this._isValidButton(MOUSE_BUTTON_CODE_MAP[event.which], inputButton) &&
this.end.indexOf(event.type) === -1
? 1
: 0;
}
}
protected _getScale(event: MouseEvent | TouchEvent): number {
if (this._isTouchEvent(event)) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (event.touches.length !== 2 || <span class="branch-1 cbranch-no" title="branch not covered" >this._baseTouches.length < 2)</span> {
return 1; // TODO: consider calculating non-pinch gesture scale
}
<span class="cstat-no" title="statement not covered" > return (</span>
this._getDistance(event.touches[0], event.touches[1]) /
this._getDistance(this._baseTouches[0], this._baseTouches[1])
);
}
return this.prevEvent.scale;
}
protected _getCenter(event: MouseEvent | TouchEvent): {
x: number;
y: number;
} {
if (this._isTouchEvent(event)) {
return {
x: event.touches[0].clientX,
y: event.touches[0].clientY,
};
}
return {
x: event.clientX,
y: event.clientY,
};
}
protected _getMovement(event: MouseEvent | TouchEvent): {
x: number;
y: number;
} {
const prev = this.prevEvent.srcEvent;
const [nextSpot, prevSpot] = [event, prev].map((e) => {
if (this._isTouchEvent(e)) {
return {
id: e.touches[0].identifier,
x: e.touches[0].clientX,
y: e.touches[0].clientY,
};
}
return {
id: null,
x: e.clientX,
y: e.clientY,
};
});
return nextSpot.id === prevSpot.id
? { x: nextSpot.x - prevSpot.x, y: nextSpot.y - prevSpot.y }
: <span class="branch-1 cbranch-no" title="branch not covered" >{ x: 0, y: 0 };</span>
}
}
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