71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
import {UIEventSource} from "../UIEventSource";
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import FeatureSource from "../FeatureSource/FeatureSource";
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/**
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* Makes sure the hash shows the selected element and vice-versa
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*/
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export default class SelectedFeatureHandler {
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private readonly _featureSource: FeatureSource;
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private readonly _hash: UIEventSource<string>;
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private readonly _selectedFeature: UIEventSource<any>;
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private static readonly _no_trigger_on = ["welcome","copyright","layers"]
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constructor(hash: UIEventSource<string>,
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selectedFeature: UIEventSource<any>,
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featureSource: FeatureSource) {
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this._hash = hash;
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this._selectedFeature = selectedFeature;
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this._featureSource = featureSource;
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const self = this;
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hash.addCallback(h => {
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if (h === undefined || h === "") {
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selectedFeature.setData(undefined);
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}else{
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self.selectFeature();
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}
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})
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featureSource.features.addCallback(_ => self.selectFeature());
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selectedFeature.addCallback(feature => {
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if(feature === undefined){
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if(SelectedFeatureHandler._no_trigger_on.indexOf(hash.data) < 0){
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hash.setData("")
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}
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}
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const h = feature?.properties?.id;
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if(h !== undefined){
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hash.setData(h)
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}
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})
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this.selectFeature();
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}
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private selectFeature(){
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const features = this._featureSource?.features?.data;
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if(features === undefined){
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return;
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}
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if(this._selectedFeature.data?.properties?.id === this._hash.data){
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// Feature already selected
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return;
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}
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const hash = this._hash.data;
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if(hash === undefined || hash === "" || hash === "#"){
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return;
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}
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for (const feature of features) {
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const id = feature.feature?.properties?.id;
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if(id === hash){
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this._selectedFeature.setData(feature.feature);
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break;
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}
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}
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}
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} |