forked from MapComplete/MapComplete
40 lines
No EOL
1.5 KiB
TypeScript
40 lines
No EOL
1.5 KiB
TypeScript
import BaseLayer from "../../Models/BaseLayer";
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import {UIEventSource} from "../UIEventSource";
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import Loc from "../../Models/Loc";
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export interface AvailableBaseLayersObj {
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readonly osmCarto: BaseLayer;
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layerOverview: BaseLayer[];
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AvailableLayersAt(location: UIEventSource<Loc>): UIEventSource<BaseLayer[]>
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SelectBestLayerAccordingTo(location: UIEventSource<Loc>, preferedCategory: UIEventSource<string | string[]>): UIEventSource<BaseLayer> ;
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}
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/**
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* Calculates which layers are available at the current location
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* Changes the basemap
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*/
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export default class AvailableBaseLayers {
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public static layerOverview: BaseLayer[];
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public static osmCarto: BaseLayer;
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private static implementation: AvailableBaseLayersObj
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static AvailableLayersAt(location: UIEventSource<Loc>): UIEventSource<BaseLayer[]> {
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return AvailableBaseLayers.implementation?.AvailableLayersAt(location) ?? new UIEventSource<BaseLayer[]>([]);
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}
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static SelectBestLayerAccordingTo(location: UIEventSource<Loc>, preferedCategory: UIEventSource<string | string[]>): UIEventSource<BaseLayer> {
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return AvailableBaseLayers.implementation?.SelectBestLayerAccordingTo(location, preferedCategory) ?? new UIEventSource<BaseLayer>(undefined);
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}
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public static implement(backend: AvailableBaseLayersObj){
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AvailableBaseLayers.layerOverview = backend.layerOverview
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AvailableBaseLayers.osmCarto = backend.osmCarto
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AvailableBaseLayers.implementation = backend
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}
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} |