mapcomplete/Logic/StrayClickHandler.ts

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import {Basemap} from "./Basemap";
import L from "leaflet";
import {UIEventSource} from "../UI/UIEventSource";
import {UIElement} from "../UI/UIElement";
/**
* The stray-click-hanlders adds a marker to the map if no feature was clicked.
* Shows the given uiToShow-element in the messagebox
*/
export class StrayClickHandler {
private _basemap: Basemap;
private _lastMarker;
private _leftMessage: UIEventSource<() => UIElement>;
private _uiToShow: (() => UIElement);
constructor(
basemap: Basemap,
selectElement: UIEventSource<any>,
leftMessage: UIEventSource<() => UIElement>,
uiToShow: (() => UIElement)) {
this._basemap = basemap;
this._leftMessage = leftMessage;
this._uiToShow = uiToShow;
const self = this;
const map = basemap.map;
basemap.LastClickLocation.addCallback(function (lastClick) {
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selectElement.setData(undefined);
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if (self._lastMarker !== undefined) {
map.removeLayer(self._lastMarker);
}
self._lastMarker = L.marker([lastClick.lat, lastClick.lon]);
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const uiElement = uiToShow();
const popup = L.popup().setContent(uiElement.Render());
uiElement.Activate();
uiElement.Update();
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self._lastMarker.addTo(map);
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self._lastMarker.bindPopup(popup).openPopup();
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self._lastMarker.on("click", () => {
leftMessage.setData(self._uiToShow);
});
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});
selectElement.addCallback(() => {
if (self._lastMarker !== undefined) {
map.removeLayer(self._lastMarker);
this._lastMarker = undefined;
}
})
}
}