56 lines
1.5 KiB
TypeScript
56 lines
1.5 KiB
TypeScript
import { ITimer } from './ITimer';
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import { Time } from '../Time';
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/**
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* 私有类隐藏ITimer的实现
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*/
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export class Timer implements ITimer{
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public context: any;
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public _timeInSeconds: number = 0;
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public _repeats: boolean = false;
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public _onTime!: (timer: ITimer) => void;
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public _isDone: boolean = false;
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public _elapsedTime: number = 0;
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public getContext<T>(): T {
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return this.context as T;
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}
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public reset(): void {
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this._elapsedTime = 0;
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}
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public stop(): void {
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this._isDone = true;
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}
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public tick(){
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// 如果stop在tick之前被调用，那么isDone将为true，我们不应该再做任何事情
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if (!this._isDone && this._elapsedTime > this._timeInSeconds){
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this._elapsedTime -= this._timeInSeconds;
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this._onTime(this);
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if (!this._isDone && !this._repeats)
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this._isDone = true;
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}
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this._elapsedTime += Time.deltaTime;
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return this._isDone;
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}
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public initialize(timeInsSeconds: number, repeats: boolean, context: any, onTime: (timer: ITimer)=>void){
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this._timeInSeconds = timeInsSeconds;
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this._repeats = repeats;
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this.context = context;
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this._onTime = onTime.bind(context);
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}
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/**
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* 空出对象引用，以便在js需要时GC可以清理它们的引用
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*/
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public unload(){
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this.context = null;
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this._onTime = null as any;
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}
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} |