mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-07-06 20:14:22 +00:00
112 lines
3.2 KiB
JavaScript
112 lines
3.2 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/geospatial/geomap.js
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type: application/javascript
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module-type: widget
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Leaflet map widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var GeomapWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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GeomapWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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GeomapWidget.prototype.render = function(parent,nextSibling) {
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// Housekeeping
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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// Render a wrapper for the map
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var domNode = this.document.createElement("div");
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domNode.style.width = "100%";
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domNode.style.height = "600px";
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// Insert it into the DOM
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parent.insertBefore(domNode,nextSibling);
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this.domNodes.push(domNode);
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// Render the map
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if($tw.browser) {
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this.renderMap(domNode);
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}
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};
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GeomapWidget.prototype.renderMap = function(domNode) {
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var self = this;
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// Get Leaflet
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var L = require("$:/plugins/tiddlywiki/geospatial/leaflet.js");
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// Create and position the map
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const map = L.map(domNode).setView([51.505, -0.09], 13);
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map.fitWorld();
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// Setup the tile layer
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const tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
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maxZoom: 19,
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attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
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}).addTo(map);
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// Create default icon
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const iconProportions = 365/560,
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iconHeight = 50;
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const myIcon = new L.Icon({
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iconUrl: $tw.utils.makeDataUri(this.wiki.getTiddlerText("$:/plugins/tiddlywiki/geospatial/images/markers/pin"),"image/svg+xml"),
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iconSize: [iconHeight * iconProportions, iconHeight], // Side of the icon
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iconAnchor: [(iconHeight * iconProportions) / 2, iconHeight], // Position of the anchor within the icon
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popupAnchor: [0, -iconHeight] // Position of the popup anchor relative to the icon anchor
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});
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// Add scale
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L.control.scale().addTo(map);
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// Add US states overlay
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const layer = L.geoJSON($tw.utils.parseJSONSafe(self.wiki.getTiddlerText("$:/plugins/geospatial/demo/features/us-states"),[])).addTo(map);
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// Create markers
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if(this.geomapMarkerFilter) {
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var titles = this.wiki.filterTiddlers(this.geomapMarkerFilter);
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$tw.utils.each(titles,function(title) {
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var tiddler = self.wiki.getTiddler(title);
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if(tiddler) {
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var lat = $tw.utils.parseNumber(tiddler.fields.lat || "0"),
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long = $tw.utils.parseNumber(tiddler.fields.long || "0"),
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alt = $tw.utils.parseNumber(tiddler.fields.alt || "0"),
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caption = tiddler.fields.caption || title;
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var m = L.marker([lat,long,alt],{icon: myIcon,draggable: false}).bindPopup(caption).addTo(map);
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}
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});
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}
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};
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/*
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Compute the internal state of the widget
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*/
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GeomapWidget.prototype.execute = function() {
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this.geomapMarkerFilter = this.getAttribute("markers");
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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GeomapWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if($tw.utils.count(changedAttributes) > 0) {
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this.refreshSelf();
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return true;
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} else {
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return false;
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}
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};
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exports.geomap = GeomapWidget;
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})();
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