mapcomplete/UI/BigComponents/Basemap.ts
2021-02-21 03:51:29 +01:00

86 lines
2.7 KiB
TypeScript

import * as L from "leaflet"
import {UIEventSource} from "../../Logic/UIEventSource";
import Loc from "../../Models/Loc";
import {UIElement} from "../UIElement";
import BaseLayer from "../../Models/BaseLayer";
export class Basemap {
public readonly map: L.Map;
constructor(leafletElementId: string,
location: UIEventSource<Loc>,
currentLayer: UIEventSource<BaseLayer>,
lastClickLocation: UIEventSource<{ lat: number, lon: number }>,
extraAttribution: UIElement) {
this.map = L.map(leafletElementId, {
center: [location.data.lat ?? 0, location.data.lon ?? 0],
zoom: location.data.zoom ?? 2,
layers: [currentLayer.data.layer],
zoomControl: false
});
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>");
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();
});
location.map(loc => loc.zoom)
.addCallback(zoom => {
if (Math.abs(self.map.getZoom() - zoom) > 0.1) {
self.map.setZoom(zoom, {});
}
})
this.map.on("click", function (e) {
// @ts-ignore
lastClickLocation.setData({lat: e.latlng.lat, lon: e.latlng.lng})
});
this.map.on("contextmenu", function (e) {
// @ts-ignore
lastClickLocation.setData({lat: e.latlng.lat, lon: e.latlng.lng});
// @ts-ignore
e.preventDefault();
});
}
}