mapcomplete/Logic/Actors/StrayClickHandler.ts
2021-01-02 21:03:40 +01:00

70 lines
No EOL
2.5 KiB
TypeScript

import * as L from "leaflet";
import {UIElement} from "../../UI/UIElement";
import {Img} from "../../UI/Img";
import Svg from "../../Svg";
import {UIEventSource} from "../UIEventSource";
import {FilteredLayer} from "../FilteredLayer";
/**
* 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(
lastClickLocation: UIEventSource<{ lat: number, lon:number }>,
selectedElement: UIEventSource<string>,
filteredLayers: UIEventSource<FilteredLayer[]>,
leafletMap: UIEventSource<L.Map>,
fullscreenMessage: UIEventSource<UIElement>,
uiToShow: (() => UIElement)) {
this._uiToShow = uiToShow;
const self = this;
filteredLayers.data.forEach((filteredLayer) => {
filteredLayer.isDisplayed.addCallback(isEnabled => {
if(isEnabled && self._lastMarker && leafletMap.data !== undefined){
// 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...
leafletMap.data.removeLayer(self._lastMarker);
}
})
})
lastClickLocation.addCallback(function (lastClick) {
selectedElement.setData(undefined);
if (self._lastMarker !== undefined) {
leafletMap.data?.removeLayer(self._lastMarker);
}
self._lastMarker = L.marker([lastClick.lat, lastClick.lon], {
icon: L.icon({
iconUrl: Img.AsData(Svg.add),
iconSize: [50, 50],
iconAnchor: [25, 50],
popupAnchor: [0, -45]
})
});
const uiElement = uiToShow();
const popup = L.popup().setContent(uiElement.Render());
self._lastMarker.addTo(leafletMap.data);
self._lastMarker.bindPopup(popup);
self._lastMarker.on("click", () => {
fullscreenMessage.setData(self._uiToShow());
uiElement.Update();
});
});
selectedElement.addCallback(() => {
if (self._lastMarker !== undefined) {
leafletMap.data.removeLayer(self._lastMarker);
this._lastMarker = undefined;
}
})
}
}