mapcomplete/Logic/Leaflet/Basemap.ts
2021-01-02 19:09:49 +01:00

79 lines
2.5 KiB
TypeScript

import * as L from "leaflet"
import {UIEventSource} from "../UIEventSource";
import {UIElement} from "../../UI/UIElement";
import {BaseLayer} from "../../Models/BaseLayer";
import AvailableBaseLayers from "../Actors/AvailableBaseLayers";
import Loc from "../../Models/Loc";
export class Basemap {
// @ts-ignore
public readonly map: Map;
public readonly LastClickLocation: UIEventSource<{ lat: number, lon: number }> = new UIEventSource<{ lat: number, lon: number }>(undefined)
constructor(leafletElementId: string,
location: UIEventSource<Loc>,
currentLayer: UIEventSource<BaseLayer>,
extraAttribution: UIElement) {
this.map = L.map(leafletElementId, {
center: [location.data.lat ?? 0, location.data.lon ?? 0],
zoom: location.data.zoom ?? 2,
layers: [AvailableBaseLayers.osmCarto.layer],
});
L.control.scale(
{
position: 'topright',
}
).addTo(this.map)
// Users are not allowed to zoom to the 'copies' on the left and the right, stuff goes wrong then
// We give a bit of leeway for people on the edges
// Also see: https://www.reddit.com/r/openstreetmap/comments/ih4zzc/mapcomplete_a_new_easytouse_editor/g31ubyv/
this.map.setMaxBounds(
[[-100, -200], [100, 200]]
);
this.map.attributionControl.setPrefix(
extraAttribution.Render() + " | <a href='https://osm.org'>OpenStreetMap</a>");
this.map.zoomControl.setPosition("bottomright");
const self = this;
let previousLayer = currentLayer.data;
currentLayer.addCallbackAndRun(layer => {
if (layer === previousLayer) {
return;
}
if (previousLayer !== undefined) {
self.map.removeLayer(previousLayer.layer);
}
previousLayer = layer;
self.map.addLayer(layer.layer);
})
this.map.on("moveend", function () {
location.data.zoom = self.map.getZoom();
location.data.lat = self.map.getCenter().lat;
location.data.lon = self.map.getCenter().lng;
location.ping();
});
this.map.on("click", function (e) {
self.LastClickLocation.setData({lat: e.latlng.lat, lon: e.latlng.lng})
});
this.map.on("contextmenu", function (e) {
self.LastClickLocation.setData({lat: e.latlng.lat, lon: e.latlng.lng});
e.preventDefault();
});
}
}