mapcomplete/UI/Base/LazyElement.ts

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import {UIElement} from "../UIElement";
export default class LazyElement extends UIElement {
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public Activate: () => void;
private _content: UIElement = undefined;
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private readonly _loadingContent: string;
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constructor(content: (() => UIElement), loadingContent = "Rendering...") {
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super();
this._loadingContent = loadingContent;
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this.dumbMode = false;
const self = this;
this.Activate = () => {
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if (this._content === undefined) {
self._content = content();
}
self.Update();
}
}
InnerRender(): string {
if (this._content === undefined) {
return this._loadingContent;
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}
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return this._content.Render();
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}
}