mapcomplete/Logic/Leaflet/StrayClickHandler.ts

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import * as L from "leaflet";
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import {UIElement} from "../../UI/UIElement";
import State from "../../State";
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/**
* 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 _lastMarker;
private _uiToShow: (() => UIElement);
constructor(
uiToShow: (() => UIElement)) {
this._uiToShow = uiToShow;
const self = this;
const map = State.state.bm.map;
State.state.filteredLayers.data.forEach((filteredLayer) => {
filteredLayer.isDisplayed.addCallback(isEnabled => {
if(isEnabled){
// When a layer is activated, we remove the 'last click location' in order to force the user to reclick
// This reclick might be at a location where a feature now appeared...
map.removeLayer(self._lastMarker);
}
})
})
State.state.bm.LastClickLocation.addCallback(function (lastClick) {
State.state.selectedElement.setData(undefined);
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if (self._lastMarker !== undefined) {
map.removeLayer(self._lastMarker);
}
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self._lastMarker = L.marker([lastClick.lat, lastClick.lon], {
icon: L.icon({
iconUrl: "./assets/add.svg",
iconSize: [50, 50],
iconAnchor: [25, 50],
popupAnchor: [0, -45]
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})
});
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const uiElement = uiToShow();
const popup = L.popup().setContent(uiElement.Render());
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self._lastMarker.addTo(map);
self._lastMarker.bindPopup(popup);
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self._lastMarker.on("click", () => {
State.state.fullScreenMessage.setData(self._uiToShow());
uiElement.Update();
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});
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});
State.state.selectedElement.addCallback(() => {
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if (self._lastMarker !== undefined) {
map.removeLayer(self._lastMarker);
this._lastMarker = undefined;
}
})
}
}