forked from MapComplete/MapComplete
49 lines
No EOL
1.4 KiB
TypeScript
49 lines
No EOL
1.4 KiB
TypeScript
import {Basemap} from "./Basemap";
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import L from "leaflet";
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import {UIEventSource} from "../UI/UIEventSource";
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import {UIElement} from "../UI/UIElement";
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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 _basemap: Basemap;
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private _lastMarker;
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private _leftMessage: UIEventSource<() => UIElement>;
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private _uiToShow: (() => UIElement);
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constructor(
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basemap: Basemap,
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selectElement: UIEventSource<any>,
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leftMessage: UIEventSource<() => UIElement>,
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uiToShow: (() => UIElement)) {
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this._basemap = basemap;
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this._leftMessage = leftMessage;
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this._uiToShow = uiToShow;
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const self = this;
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const map = basemap.map;
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basemap.LastClickLocation.addCallback(function (lastClick) {
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if (self._lastMarker !== undefined) {
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map.removeLayer(self._lastMarker);
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}
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self._lastMarker = L.marker([lastClick.lat, lastClick.lon]);
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self._lastMarker.addTo(map);
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leftMessage.setData(self._uiToShow);
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});
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selectElement.addCallback(() => {
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if (self._lastMarker !== undefined) {
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map.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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} |