36 lines
873 B
TypeScript
36 lines
873 B
TypeScript
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export class ObProperty<T> {
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private value:T; // 值
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private onChanges:((newValue:T, oldValue:T)=>void)[]=[];
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constructor(initValue:T){
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this.value = initValue;
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}
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public get Value():T{ return this.value;}
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public set Value(newValue:T) {
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if(newValue != this.value){
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const oldValue = this.value;
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this.value = newValue;
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this.onChanges.forEach(callback=>callback(newValue, oldValue));
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}
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}
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// 注册变更回调
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public RegisterOnChange(callback:(newValue:T, oldValue:T)=>void):void{
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this.onChanges.push(callback);
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}
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// 移除变更回调
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public UnregisterOnChange(callback:(newValue:T, oldValue:T)=>void):void {
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const idx = this.onChanges.indexOf(callback);
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if (idx !== -1){
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this.onChanges.splice(idx, 1);
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}
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}
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}
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