70 lines
No EOL
2.5 KiB
TypeScript
70 lines
No EOL
2.5 KiB
TypeScript
import * as L from "leaflet";
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import {UIElement} from "../../UI/UIElement";
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import {Img} from "../../UI/Img";
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import Svg from "../../Svg";
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import {UIEventSource} from "../UIEventSource";
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import {FilteredLayer} from "../FilteredLayer";
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/**
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* The stray-click-hanlders adds a marker to the map if no feature was clicked.
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* Shows the given uiToShow-element in the messagebox
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*/
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export class StrayClickHandler {
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private _lastMarker;
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private _uiToShow: (() => UIElement);
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constructor(
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lastClickLocation: UIEventSource<{ lat: number, lon:number }>,
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selectedElement: UIEventSource<string>,
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filteredLayers: UIEventSource<FilteredLayer[]>,
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leafletMap: UIEventSource<L.Map>,
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fullscreenMessage: UIEventSource<UIElement>,
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uiToShow: (() => UIElement)) {
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this._uiToShow = uiToShow;
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const self = this;
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filteredLayers.data.forEach((filteredLayer) => {
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filteredLayer.isDisplayed.addCallback(isEnabled => {
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if(isEnabled && self._lastMarker && leafletMap.data !== undefined){
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// When a layer is activated, we remove the 'last click location' in order to force the user to reclick
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// This reclick might be at a location where a feature now appeared...
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leafletMap.data.removeLayer(self._lastMarker);
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}
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})
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})
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lastClickLocation.addCallback(function (lastClick) {
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selectedElement.setData(undefined);
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if (self._lastMarker !== undefined) {
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leafletMap.data?.removeLayer(self._lastMarker);
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}
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self._lastMarker = L.marker([lastClick.lat, lastClick.lon], {
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icon: L.icon({
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iconUrl: Img.AsData(Svg.add),
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iconSize: [50, 50],
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iconAnchor: [25, 50],
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popupAnchor: [0, -45]
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})
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});
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const uiElement = uiToShow();
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const popup = L.popup().setContent(uiElement.Render());
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self._lastMarker.addTo(leafletMap.data);
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self._lastMarker.bindPopup(popup);
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self._lastMarker.on("click", () => {
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fullscreenMessage.setData(self._uiToShow());
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uiElement.Update();
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});
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});
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selectedElement.addCallback(() => {
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if (self._lastMarker !== undefined) {
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leafletMap.data.removeLayer(self._lastMarker);
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this._lastMarker = undefined;
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}
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})
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}
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} |