2691 lines
79 KiB
JavaScript
2691 lines
79 KiB
JavaScript
/*
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* Leaflet.markercluster 1.4.1+master.37ab9a2,
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* Provides Beautiful Animated Marker Clustering functionality for Leaflet, a JS library for interactive maps.
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* https://github.com/Leaflet/Leaflet.markercluster
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* (c) 2012-2017, Dave Leaver, smartrak
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
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typeof define === 'function' && define.amd ? define(['exports'], factory) :
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(factory((global.Leaflet = global.Leaflet || {}, global.Leaflet.markercluster = global.Leaflet.markercluster || {})));
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}(this, (function (exports) { 'use strict';
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/*
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* L.MarkerClusterGroup extends L.FeatureGroup by clustering the markers contained within
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*/
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var MarkerClusterGroup = L.MarkerClusterGroup = L.FeatureGroup.extend({
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options: {
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maxClusterRadius: 80, //A cluster will cover at most this many pixels from its center
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iconCreateFunction: null,
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clusterPane: L.Marker.prototype.options.pane,
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spiderfyOnMaxZoom: true,
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showCoverageOnHover: true,
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zoomToBoundsOnClick: true,
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singleMarkerMode: false,
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disableClusteringAtZoom: null,
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// Setting this to false prevents the removal of any clusters outside of the viewpoint, which
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// is the default behaviour for performance reasons.
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removeOutsideVisibleBounds: true,
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// Set to false to disable all animations (zoom and spiderfy).
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// If false, option animateAddingMarkers below has no effect.
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// If L.DomUtil.TRANSITION is falsy, this option has no effect.
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animate: true,
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//Whether to animate adding markers after adding the MarkerClusterGroup to the map
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// If you are adding individual markers set to true, if adding bulk markers leave false for massive performance gains.
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animateAddingMarkers: false,
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//Increase to increase the distance away that spiderfied markers appear from the center
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spiderfyDistanceMultiplier: 1,
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// Make it possible to specify a polyline options on a spider leg
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spiderLegPolylineOptions: { weight: 1.5, color: '#222', opacity: 0.5 },
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// When bulk adding layers, adds markers in chunks. Means addLayers may not add all the layers in the call, others will be loaded during setTimeouts
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chunkedLoading: false,
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chunkInterval: 200, // process markers for a maximum of ~ n milliseconds (then trigger the chunkProgress callback)
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chunkDelay: 50, // at the end of each interval, give n milliseconds back to system/browser
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chunkProgress: null, // progress callback: function(processed, total, elapsed) (e.g. for a progress indicator)
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//Options to pass to the L.Polygon constructor
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polygonOptions: {}
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},
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initialize: function (options) {
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L.Util.setOptions(this, options);
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if (!this.options.iconCreateFunction) {
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this.options.iconCreateFunction = this._defaultIconCreateFunction;
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}
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this._featureGroup = L.featureGroup();
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this._featureGroup.addEventParent(this);
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this._nonPointGroup = L.featureGroup();
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this._nonPointGroup.addEventParent(this);
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this._inZoomAnimation = 0;
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this._needsClustering = [];
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this._needsRemoving = []; //Markers removed while we aren't on the map need to be kept track of
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//The bounds of the currently shown area (from _getExpandedVisibleBounds) Updated on zoom/move
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this._currentShownBounds = null;
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this._queue = [];
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this._childMarkerEventHandlers = {
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'dragstart': this._childMarkerDragStart,
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'move': this._childMarkerMoved,
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'dragend': this._childMarkerDragEnd,
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};
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// Hook the appropriate animation methods.
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var animate = L.DomUtil.TRANSITION && this.options.animate;
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L.extend(this, animate ? this._withAnimation : this._noAnimation);
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// Remember which MarkerCluster class to instantiate (animated or not).
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this._markerCluster = animate ? L.MarkerCluster : L.MarkerClusterNonAnimated;
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},
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addLayer: function (layer) {
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if (layer instanceof L.LayerGroup) {
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return this.addLayers([layer]);
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}
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//Don't cluster non point data
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if (!layer.getLatLng) {
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this._nonPointGroup.addLayer(layer);
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this.fire('layeradd', { layer: layer });
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return this;
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}
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if (!this._map) {
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this._needsClustering.push(layer);
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this.fire('layeradd', { layer: layer });
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return this;
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}
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if (this.hasLayer(layer)) {
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return this;
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}
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//If we have already clustered we'll need to add this one to a cluster
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if (this._unspiderfy) {
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this._unspiderfy();
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}
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this._addLayer(layer, this._maxZoom);
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this.fire('layeradd', { layer: layer });
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// Refresh bounds and weighted positions.
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this._topClusterLevel._recalculateBounds();
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this._refreshClustersIcons();
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//Work out what is visible
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var visibleLayer = layer,
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currentZoom = this._zoom;
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if (layer.__parent) {
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while (visibleLayer.__parent._zoom >= currentZoom) {
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visibleLayer = visibleLayer.__parent;
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}
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}
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if (this._currentShownBounds.contains(visibleLayer.getLatLng())) {
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if (this.options.animateAddingMarkers) {
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this._animationAddLayer(layer, visibleLayer);
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} else {
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this._animationAddLayerNonAnimated(layer, visibleLayer);
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}
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}
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return this;
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},
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removeLayer: function (layer) {
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if (layer instanceof L.LayerGroup) {
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return this.removeLayers([layer]);
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}
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//Non point layers
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if (!layer.getLatLng) {
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this._nonPointGroup.removeLayer(layer);
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this.fire('layerremove', { layer: layer });
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return this;
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}
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if (!this._map) {
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if (!this._arraySplice(this._needsClustering, layer) && this.hasLayer(layer)) {
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this._needsRemoving.push({ layer: layer, latlng: layer._latlng });
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}
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this.fire('layerremove', { layer: layer });
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return this;
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}
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if (!layer.__parent) {
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return this;
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}
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if (this._unspiderfy) {
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this._unspiderfy();
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this._unspiderfyLayer(layer);
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}
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//Remove the marker from clusters
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this._removeLayer(layer, true);
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this.fire('layerremove', { layer: layer });
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// Refresh bounds and weighted positions.
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this._topClusterLevel._recalculateBounds();
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this._refreshClustersIcons();
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layer.off(this._childMarkerEventHandlers, this);
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if (this._featureGroup.hasLayer(layer)) {
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this._featureGroup.removeLayer(layer);
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if (layer.clusterShow) {
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layer.clusterShow();
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}
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}
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return this;
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},
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//Takes an array of markers and adds them in bulk
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addLayers: function (layersArray, skipLayerAddEvent) {
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if (!L.Util.isArray(layersArray)) {
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return this.addLayer(layersArray);
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}
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var fg = this._featureGroup,
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npg = this._nonPointGroup,
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chunked = this.options.chunkedLoading,
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chunkInterval = this.options.chunkInterval,
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chunkProgress = this.options.chunkProgress,
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l = layersArray.length,
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offset = 0,
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originalArray = true,
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m;
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if (this._map) {
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var started = (new Date()).getTime();
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var process = L.bind(function () {
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var start = (new Date()).getTime();
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for (; offset < l; offset++) {
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if (chunked && offset % 200 === 0) {
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// every couple hundred markers, instrument the time elapsed since processing started:
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var elapsed = (new Date()).getTime() - start;
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if (elapsed > chunkInterval) {
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break; // been working too hard, time to take a break :-)
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}
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}
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m = layersArray[offset];
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// Group of layers, append children to layersArray and skip.
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// Side effects:
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// - Total increases, so chunkProgress ratio jumps backward.
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// - Groups are not included in this group, only their non-group child layers (hasLayer).
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// Changing array length while looping does not affect performance in current browsers:
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// http://jsperf.com/for-loop-changing-length/6
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if (m instanceof L.LayerGroup) {
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if (originalArray) {
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layersArray = layersArray.slice();
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originalArray = false;
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}
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this._extractNonGroupLayers(m, layersArray);
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l = layersArray.length;
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continue;
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}
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//Not point data, can't be clustered
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if (!m.getLatLng) {
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npg.addLayer(m);
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if (!skipLayerAddEvent) {
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this.fire('layeradd', { layer: m });
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}
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continue;
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}
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if (this.hasLayer(m)) {
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continue;
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}
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this._addLayer(m, this._maxZoom);
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if (!skipLayerAddEvent) {
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this.fire('layeradd', { layer: m });
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}
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//If we just made a cluster of size 2 then we need to remove the other marker from the map (if it is) or we never will
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if (m.__parent) {
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if (m.__parent.getChildCount() === 2) {
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var markers = m.__parent.getAllChildMarkers(),
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otherMarker = markers[0] === m ? markers[1] : markers[0];
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fg.removeLayer(otherMarker);
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}
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}
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}
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if (chunkProgress) {
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// report progress and time elapsed:
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chunkProgress(offset, l, (new Date()).getTime() - started);
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}
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// Completed processing all markers.
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if (offset === l) {
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// Refresh bounds and weighted positions.
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this._topClusterLevel._recalculateBounds();
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this._refreshClustersIcons();
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this._topClusterLevel._recursivelyAddChildrenToMap(null, this._zoom, this._currentShownBounds);
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} else {
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setTimeout(process, this.options.chunkDelay);
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}
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}, this);
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process();
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} else {
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var needsClustering = this._needsClustering;
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for (; offset < l; offset++) {
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m = layersArray[offset];
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// Group of layers, append children to layersArray and skip.
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if (m instanceof L.LayerGroup) {
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if (originalArray) {
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layersArray = layersArray.slice();
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originalArray = false;
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}
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this._extractNonGroupLayers(m, layersArray);
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l = layersArray.length;
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continue;
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}
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//Not point data, can't be clustered
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if (!m.getLatLng) {
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npg.addLayer(m);
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continue;
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}
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if (this.hasLayer(m)) {
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continue;
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}
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needsClustering.push(m);
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}
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}
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return this;
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},
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//Takes an array of markers and removes them in bulk
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removeLayers: function (layersArray) {
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var i, m,
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l = layersArray.length,
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fg = this._featureGroup,
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npg = this._nonPointGroup,
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originalArray = true;
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if (!this._map) {
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for (i = 0; i < l; i++) {
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m = layersArray[i];
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// Group of layers, append children to layersArray and skip.
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if (m instanceof L.LayerGroup) {
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if (originalArray) {
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layersArray = layersArray.slice();
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originalArray = false;
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}
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this._extractNonGroupLayers(m, layersArray);
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l = layersArray.length;
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continue;
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}
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this._arraySplice(this._needsClustering, m);
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npg.removeLayer(m);
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if (this.hasLayer(m)) {
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this._needsRemoving.push({ layer: m, latlng: m._latlng });
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}
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this.fire('layerremove', { layer: m });
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}
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return this;
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}
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if (this._unspiderfy) {
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this._unspiderfy();
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// Work on a copy of the array, so that next loop is not affected.
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var layersArray2 = layersArray.slice(),
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l2 = l;
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for (i = 0; i < l2; i++) {
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m = layersArray2[i];
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// Group of layers, append children to layersArray and skip.
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if (m instanceof L.LayerGroup) {
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this._extractNonGroupLayers(m, layersArray2);
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l2 = layersArray2.length;
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continue;
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}
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this._unspiderfyLayer(m);
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}
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}
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for (i = 0; i < l; i++) {
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m = layersArray[i];
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// Group of layers, append children to layersArray and skip.
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if (m instanceof L.LayerGroup) {
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if (originalArray) {
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layersArray = layersArray.slice();
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originalArray = false;
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}
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this._extractNonGroupLayers(m, layersArray);
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l = layersArray.length;
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continue;
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}
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if (!m.__parent) {
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npg.removeLayer(m);
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this.fire('layerremove', { layer: m });
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continue;
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}
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this._removeLayer(m, true, true);
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this.fire('layerremove', { layer: m });
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if (fg.hasLayer(m)) {
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fg.removeLayer(m);
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if (m.clusterShow) {
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m.clusterShow();
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}
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}
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}
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// Refresh bounds and weighted positions.
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this._topClusterLevel._recalculateBounds();
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this._refreshClustersIcons();
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//Fix up the clusters and markers on the map
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this._topClusterLevel._recursivelyAddChildrenToMap(null, this._zoom, this._currentShownBounds);
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return this;
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},
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//Removes all layers from the MarkerClusterGroup
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clearLayers: function () {
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//Need our own special implementation as the LayerGroup one doesn't work for us
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//If we aren't on the map (yet), blow away the markers we know of
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if (!this._map) {
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this._needsClustering = [];
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this._needsRemoving = [];
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delete this._gridClusters;
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delete this._gridUnclustered;
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}
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if (this._noanimationUnspiderfy) {
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this._noanimationUnspiderfy();
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}
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//Remove all the visible layers
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this._featureGroup.clearLayers();
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this._nonPointGroup.clearLayers();
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this.eachLayer(function (marker) {
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marker.off(this._childMarkerEventHandlers, this);
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delete marker.__parent;
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}, this);
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if (this._map) {
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//Reset _topClusterLevel and the DistanceGrids
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this._generateInitialClusters();
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}
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return this;
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},
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//Override FeatureGroup.getBounds as it doesn't work
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getBounds: function () {
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var bounds = new L.LatLngBounds();
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if (this._topClusterLevel) {
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bounds.extend(this._topClusterLevel._bounds);
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}
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for (var i = this._needsClustering.length - 1; i >= 0; i--) {
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bounds.extend(this._needsClustering[i].getLatLng());
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}
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bounds.extend(this._nonPointGroup.getBounds());
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return bounds;
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},
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//Overrides LayerGroup.eachLayer
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eachLayer: function (method, context) {
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var markers = this._needsClustering.slice(),
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needsRemoving = this._needsRemoving,
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thisNeedsRemoving, i, j;
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if (this._topClusterLevel) {
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this._topClusterLevel.getAllChildMarkers(markers);
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}
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for (i = markers.length - 1; i >= 0; i--) {
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thisNeedsRemoving = true;
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for (j = needsRemoving.length - 1; j >= 0; j--) {
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if (needsRemoving[j].layer === markers[i]) {
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thisNeedsRemoving = false;
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break;
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}
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}
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if (thisNeedsRemoving) {
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method.call(context, markers[i]);
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}
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}
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this._nonPointGroup.eachLayer(method, context);
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},
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//Overrides LayerGroup.getLayers
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getLayers: function () {
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var layers = [];
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this.eachLayer(function (l) {
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layers.push(l);
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});
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return layers;
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},
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//Overrides LayerGroup.getLayer, WARNING: Really bad performance
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getLayer: function (id) {
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var result = null;
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id = parseInt(id, 10);
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this.eachLayer(function (l) {
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if (L.stamp(l) === id) {
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result = l;
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}
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});
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return result;
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},
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//Returns true if the given layer is in this MarkerClusterGroup
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hasLayer: function (layer) {
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if (!layer) {
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return false;
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}
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var i, anArray = this._needsClustering;
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for (i = anArray.length - 1; i >= 0; i--) {
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if (anArray[i] === layer) {
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return true;
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}
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}
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anArray = this._needsRemoving;
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for (i = anArray.length - 1; i >= 0; i--) {
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if (anArray[i].layer === layer) {
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return false;
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}
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}
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return !!(layer.__parent && layer.__parent._group === this) || this._nonPointGroup.hasLayer(layer);
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},
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//Zoom down to show the given layer (spiderfying if necessary) then calls the callback
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zoomToShowLayer: function (layer, callback) {
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if (typeof callback !== 'function') {
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callback = function () {};
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}
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var showMarker = function () {
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if ((layer._icon || layer.__parent._icon) && !this._inZoomAnimation) {
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this._map.off('moveend', showMarker, this);
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this.off('animationend', showMarker, this);
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if (layer._icon) {
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callback();
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} else if (layer.__parent._icon) {
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this.once('spiderfied', callback, this);
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layer.__parent.spiderfy();
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}
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}
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};
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|
|
if (layer._icon && this._map.getBounds().contains(layer.getLatLng())) {
|
|
//Layer is visible ond on screen, immediate return
|
|
callback();
|
|
} else if (layer.__parent._zoom < Math.round(this._map._zoom)) {
|
|
//Layer should be visible at this zoom level. It must not be on screen so just pan over to it
|
|
this._map.on('moveend', showMarker, this);
|
|
this._map.panTo(layer.getLatLng());
|
|
} else {
|
|
this._map.on('moveend', showMarker, this);
|
|
this.on('animationend', showMarker, this);
|
|
layer.__parent.zoomToBounds();
|
|
}
|
|
},
|
|
|
|
//Overrides FeatureGroup.onAdd
|
|
onAdd: function (map) {
|
|
this._map = map;
|
|
var i, l, layer;
|
|
|
|
if (!isFinite(this._map.getMaxZoom())) {
|
|
throw "Map has no maxZoom specified";
|
|
}
|
|
|
|
this._featureGroup.addTo(map);
|
|
this._nonPointGroup.addTo(map);
|
|
|
|
if (!this._gridClusters) {
|
|
this._generateInitialClusters();
|
|
}
|
|
|
|
this._maxLat = map.options.crs.projection.MAX_LATITUDE;
|
|
|
|
//Restore all the positions as they are in the MCG before removing them
|
|
for (i = 0, l = this._needsRemoving.length; i < l; i++) {
|
|
layer = this._needsRemoving[i];
|
|
layer.newlatlng = layer.layer._latlng;
|
|
layer.layer._latlng = layer.latlng;
|
|
}
|
|
//Remove them, then restore their new positions
|
|
for (i = 0, l = this._needsRemoving.length; i < l; i++) {
|
|
layer = this._needsRemoving[i];
|
|
this._removeLayer(layer.layer, true);
|
|
layer.layer._latlng = layer.newlatlng;
|
|
}
|
|
this._needsRemoving = [];
|
|
|
|
//Remember the current zoom level and bounds
|
|
this._zoom = Math.round(this._map._zoom);
|
|
this._currentShownBounds = this._getExpandedVisibleBounds();
|
|
|
|
this._map.on('zoomend', this._zoomEnd, this);
|
|
this._map.on('moveend', this._moveEnd, this);
|
|
|
|
if (this._spiderfierOnAdd) { //TODO FIXME: Not sure how to have spiderfier add something on here nicely
|
|
this._spiderfierOnAdd();
|
|
}
|
|
|
|
this._bindEvents();
|
|
|
|
//Actually add our markers to the map:
|
|
l = this._needsClustering;
|
|
this._needsClustering = [];
|
|
this.addLayers(l, true);
|
|
},
|
|
|
|
//Overrides FeatureGroup.onRemove
|
|
onRemove: function (map) {
|
|
map.off('zoomend', this._zoomEnd, this);
|
|
map.off('moveend', this._moveEnd, this);
|
|
|
|
this._unbindEvents();
|
|
|
|
//In case we are in a cluster animation
|
|
this._map._mapPane.className = this._map._mapPane.className.replace(' leaflet-cluster-anim', '');
|
|
|
|
if (this._spiderfierOnRemove) { //TODO FIXME: Not sure how to have spiderfier add something on here nicely
|
|
this._spiderfierOnRemove();
|
|
}
|
|
|
|
delete this._maxLat;
|
|
|
|
//Clean up all the layers we added to the map
|
|
this._hideCoverage();
|
|
this._featureGroup.remove();
|
|
this._nonPointGroup.remove();
|
|
|
|
this._featureGroup.clearLayers();
|
|
|
|
this._map = null;
|
|
},
|
|
|
|
getVisibleParent: function (marker) {
|
|
var vMarker = marker;
|
|
while (vMarker && !vMarker._icon) {
|
|
vMarker = vMarker.__parent;
|
|
}
|
|
return vMarker || null;
|
|
},
|
|
|
|
//Remove the given object from the given array
|
|
_arraySplice: function (anArray, obj) {
|
|
for (var i = anArray.length - 1; i >= 0; i--) {
|
|
if (anArray[i] === obj) {
|
|
anArray.splice(i, 1);
|
|
return true;
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Removes a marker from all _gridUnclustered zoom levels, starting at the supplied zoom.
|
|
* @param marker to be removed from _gridUnclustered.
|
|
* @param z integer bottom start zoom level (included)
|
|
* @private
|
|
*/
|
|
_removeFromGridUnclustered: function (marker, z) {
|
|
var map = this._map,
|
|
gridUnclustered = this._gridUnclustered,
|
|
minZoom = Math.floor(this._map.getMinZoom());
|
|
|
|
for (; z >= minZoom; z--) {
|
|
if (!gridUnclustered[z].removeObject(marker, map.project(marker.getLatLng(), z))) {
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
_childMarkerDragStart: function (e) {
|
|
e.target.__dragStart = e.target._latlng;
|
|
},
|
|
|
|
_childMarkerMoved: function (e) {
|
|
if (!this._ignoreMove && !e.target.__dragStart) {
|
|
var isPopupOpen = e.target._popup && e.target._popup.isOpen();
|
|
|
|
this._moveChild(e.target, e.oldLatLng, e.latlng);
|
|
|
|
if (isPopupOpen) {
|
|
e.target.openPopup();
|
|
}
|
|
}
|
|
},
|
|
|
|
_moveChild: function (layer, from, to) {
|
|
layer._latlng = from;
|
|
this.removeLayer(layer);
|
|
|
|
layer._latlng = to;
|
|
this.addLayer(layer);
|
|
},
|
|
|
|
_childMarkerDragEnd: function (e) {
|
|
var dragStart = e.target.__dragStart;
|
|
delete e.target.__dragStart;
|
|
if (dragStart) {
|
|
this._moveChild(e.target, dragStart, e.target._latlng);
|
|
}
|
|
},
|
|
|
|
|
|
//Internal function for removing a marker from everything.
|
|
//dontUpdateMap: set to true if you will handle updating the map manually (for bulk functions)
|
|
_removeLayer: function (marker, removeFromDistanceGrid, dontUpdateMap) {
|
|
var gridClusters = this._gridClusters,
|
|
gridUnclustered = this._gridUnclustered,
|
|
fg = this._featureGroup,
|
|
map = this._map,
|
|
minZoom = Math.floor(this._map.getMinZoom());
|
|
|
|
//Remove the marker from distance clusters it might be in
|
|
if (removeFromDistanceGrid) {
|
|
this._removeFromGridUnclustered(marker, this._maxZoom);
|
|
}
|
|
|
|
//Work our way up the clusters removing them as we go if required
|
|
var cluster = marker.__parent,
|
|
markers = cluster._markers,
|
|
otherMarker;
|
|
|
|
//Remove the marker from the immediate parents marker list
|
|
this._arraySplice(markers, marker);
|
|
|
|
while (cluster) {
|
|
cluster._childCount--;
|
|
cluster._boundsNeedUpdate = true;
|
|
|
|
if (cluster._zoom < minZoom) {
|
|
//Top level, do nothing
|
|
break;
|
|
} else if (removeFromDistanceGrid && cluster._childCount <= 1) { //Cluster no longer required
|
|
//We need to push the other marker up to the parent
|
|
otherMarker = cluster._markers[0] === marker ? cluster._markers[1] : cluster._markers[0];
|
|
|
|
//Update distance grid
|
|
gridClusters[cluster._zoom].removeObject(cluster, map.project(cluster._cLatLng, cluster._zoom));
|
|
gridUnclustered[cluster._zoom].addObject(otherMarker, map.project(otherMarker.getLatLng(), cluster._zoom));
|
|
|
|
//Move otherMarker up to parent
|
|
this._arraySplice(cluster.__parent._childClusters, cluster);
|
|
cluster.__parent._markers.push(otherMarker);
|
|
otherMarker.__parent = cluster.__parent;
|
|
|
|
if (cluster._icon) {
|
|
//Cluster is currently on the map, need to put the marker on the map instead
|
|
fg.removeLayer(cluster);
|
|
if (!dontUpdateMap) {
|
|
fg.addLayer(otherMarker);
|
|
}
|
|
}
|
|
} else {
|
|
cluster._iconNeedsUpdate = true;
|
|
}
|
|
|
|
cluster = cluster.__parent;
|
|
}
|
|
|
|
delete marker.__parent;
|
|
},
|
|
|
|
_isOrIsParent: function (el, oel) {
|
|
while (oel) {
|
|
if (el === oel) {
|
|
return true;
|
|
}
|
|
oel = oel.parentNode;
|
|
}
|
|
return false;
|
|
},
|
|
|
|
//Override L.Evented.fire
|
|
fire: function (type, data, propagate) {
|
|
if (data && data.layer instanceof L.MarkerCluster) {
|
|
//Prevent multiple clustermouseover/off events if the icon is made up of stacked divs (Doesn't work in ie <= 8, no relatedTarget)
|
|
if (data.originalEvent && this._isOrIsParent(data.layer._icon, data.originalEvent.relatedTarget)) {
|
|
return;
|
|
}
|
|
type = 'cluster' + type;
|
|
}
|
|
|
|
L.FeatureGroup.prototype.fire.call(this, type, data, propagate);
|
|
},
|
|
|
|
//Override L.Evented.listens
|
|
listens: function (type, propagate) {
|
|
return L.FeatureGroup.prototype.listens.call(this, type, propagate) || L.FeatureGroup.prototype.listens.call(this, 'cluster' + type, propagate);
|
|
},
|
|
|
|
//Default functionality
|
|
_defaultIconCreateFunction: function (cluster) {
|
|
var childCount = cluster.getChildCount();
|
|
|
|
var c = ' marker-cluster-';
|
|
if (childCount < 10) {
|
|
c += 'small';
|
|
} else if (childCount < 100) {
|
|
c += 'medium';
|
|
} else {
|
|
c += 'large';
|
|
}
|
|
|
|
return new L.DivIcon({ html: '<div><span>' + childCount + '</span></div>', className: 'marker-cluster' + c, iconSize: new L.Point(40, 40) });
|
|
},
|
|
|
|
_bindEvents: function () {
|
|
var map = this._map,
|
|
spiderfyOnMaxZoom = this.options.spiderfyOnMaxZoom,
|
|
showCoverageOnHover = this.options.showCoverageOnHover,
|
|
zoomToBoundsOnClick = this.options.zoomToBoundsOnClick;
|
|
|
|
//Zoom on cluster click or spiderfy if we are at the lowest level
|
|
if (spiderfyOnMaxZoom || zoomToBoundsOnClick) {
|
|
this.on('clusterclick', this._zoomOrSpiderfy, this);
|
|
}
|
|
|
|
//Show convex hull (boundary) polygon on mouse over
|
|
if (showCoverageOnHover) {
|
|
this.on('clustermouseover', this._showCoverage, this);
|
|
this.on('clustermouseout', this._hideCoverage, this);
|
|
map.on('zoomend', this._hideCoverage, this);
|
|
}
|
|
},
|
|
|
|
_zoomOrSpiderfy: function (e) {
|
|
var cluster = e.layer,
|
|
bottomCluster = cluster;
|
|
|
|
while (bottomCluster._childClusters.length === 1) {
|
|
bottomCluster = bottomCluster._childClusters[0];
|
|
}
|
|
|
|
if (bottomCluster._zoom === this._maxZoom &&
|
|
bottomCluster._childCount === cluster._childCount &&
|
|
this.options.spiderfyOnMaxZoom) {
|
|
|
|
// All child markers are contained in a single cluster from this._maxZoom to this cluster.
|
|
cluster.spiderfy();
|
|
} else if (this.options.zoomToBoundsOnClick) {
|
|
cluster.zoomToBounds();
|
|
}
|
|
|
|
// Focus the map again for keyboard users.
|
|
if (e.originalEvent && e.originalEvent.keyCode === 13) {
|
|
this._map._container.focus();
|
|
}
|
|
},
|
|
|
|
_showCoverage: function (e) {
|
|
var map = this._map;
|
|
if (this._inZoomAnimation) {
|
|
return;
|
|
}
|
|
if (this._shownPolygon) {
|
|
map.removeLayer(this._shownPolygon);
|
|
}
|
|
if (e.layer.getChildCount() > 2 && e.layer !== this._spiderfied) {
|
|
this._shownPolygon = new L.Polygon(e.layer.getConvexHull(), this.options.polygonOptions);
|
|
map.addLayer(this._shownPolygon);
|
|
}
|
|
},
|
|
|
|
_hideCoverage: function () {
|
|
if (this._shownPolygon) {
|
|
this._map.removeLayer(this._shownPolygon);
|
|
this._shownPolygon = null;
|
|
}
|
|
},
|
|
|
|
_unbindEvents: function () {
|
|
var spiderfyOnMaxZoom = this.options.spiderfyOnMaxZoom,
|
|
showCoverageOnHover = this.options.showCoverageOnHover,
|
|
zoomToBoundsOnClick = this.options.zoomToBoundsOnClick,
|
|
map = this._map;
|
|
|
|
if (spiderfyOnMaxZoom || zoomToBoundsOnClick) {
|
|
this.off('clusterclick', this._zoomOrSpiderfy, this);
|
|
}
|
|
if (showCoverageOnHover) {
|
|
this.off('clustermouseover', this._showCoverage, this);
|
|
this.off('clustermouseout', this._hideCoverage, this);
|
|
map.off('zoomend', this._hideCoverage, this);
|
|
}
|
|
},
|
|
|
|
_zoomEnd: function () {
|
|
if (!this._map) { //May have been removed from the map by a zoomEnd handler
|
|
return;
|
|
}
|
|
this._mergeSplitClusters();
|
|
|
|
this._zoom = Math.round(this._map._zoom);
|
|
this._currentShownBounds = this._getExpandedVisibleBounds();
|
|
},
|
|
|
|
_moveEnd: function () {
|
|
if (this._inZoomAnimation) {
|
|
return;
|
|
}
|
|
|
|
var newBounds = this._getExpandedVisibleBounds();
|
|
|
|
this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), this._zoom, newBounds);
|
|
this._topClusterLevel._recursivelyAddChildrenToMap(null, Math.round(this._map._zoom), newBounds);
|
|
|
|
this._currentShownBounds = newBounds;
|
|
return;
|
|
},
|
|
|
|
_generateInitialClusters: function () {
|
|
var maxZoom = Math.ceil(this._map.getMaxZoom()),
|
|
minZoom = Math.floor(this._map.getMinZoom()),
|
|
radius = this.options.maxClusterRadius,
|
|
radiusFn = radius;
|
|
|
|
//If we just set maxClusterRadius to a single number, we need to create
|
|
//a simple function to return that number. Otherwise, we just have to
|
|
//use the function we've passed in.
|
|
if (typeof radius !== "function") {
|
|
radiusFn = function () { return radius; };
|
|
}
|
|
|
|
if (this.options.disableClusteringAtZoom !== null) {
|
|
maxZoom = this.options.disableClusteringAtZoom - 1;
|
|
}
|
|
this._maxZoom = maxZoom;
|
|
this._gridClusters = {};
|
|
this._gridUnclustered = {};
|
|
|
|
//Set up DistanceGrids for each zoom
|
|
for (var zoom = maxZoom; zoom >= minZoom; zoom--) {
|
|
this._gridClusters[zoom] = new L.DistanceGrid(radiusFn(zoom));
|
|
this._gridUnclustered[zoom] = new L.DistanceGrid(radiusFn(zoom));
|
|
}
|
|
|
|
// Instantiate the appropriate L.MarkerCluster class (animated or not).
|
|
this._topClusterLevel = new this._markerCluster(this, minZoom - 1);
|
|
},
|
|
|
|
//Zoom: Zoom to start adding at (Pass this._maxZoom to start at the bottom)
|
|
_addLayer: function (layer, zoom) {
|
|
var gridClusters = this._gridClusters,
|
|
gridUnclustered = this._gridUnclustered,
|
|
minZoom = Math.floor(this._map.getMinZoom()),
|
|
markerPoint, z;
|
|
|
|
if (this.options.singleMarkerMode) {
|
|
this._overrideMarkerIcon(layer);
|
|
}
|
|
|
|
layer.on(this._childMarkerEventHandlers, this);
|
|
|
|
//Find the lowest zoom level to slot this one in
|
|
for (; zoom >= minZoom; zoom--) {
|
|
markerPoint = this._map.project(layer.getLatLng(), zoom); // calculate pixel position
|
|
|
|
//Try find a cluster close by
|
|
var closest = gridClusters[zoom].getNearObject(markerPoint);
|
|
if (closest) {
|
|
closest._addChild(layer);
|
|
layer.__parent = closest;
|
|
return;
|
|
}
|
|
|
|
//Try find a marker close by to form a new cluster with
|
|
closest = gridUnclustered[zoom].getNearObject(markerPoint);
|
|
if (closest) {
|
|
var parent = closest.__parent;
|
|
if (parent) {
|
|
this._removeLayer(closest, false);
|
|
}
|
|
|
|
//Create new cluster with these 2 in it
|
|
|
|
var newCluster = new this._markerCluster(this, zoom, closest, layer);
|
|
gridClusters[zoom].addObject(newCluster, this._map.project(newCluster._cLatLng, zoom));
|
|
closest.__parent = newCluster;
|
|
layer.__parent = newCluster;
|
|
|
|
//First create any new intermediate parent clusters that don't exist
|
|
var lastParent = newCluster;
|
|
for (z = zoom - 1; z > parent._zoom; z--) {
|
|
lastParent = new this._markerCluster(this, z, lastParent);
|
|
gridClusters[z].addObject(lastParent, this._map.project(closest.getLatLng(), z));
|
|
}
|
|
parent._addChild(lastParent);
|
|
|
|
//Remove closest from this zoom level and any above that it is in, replace with newCluster
|
|
this._removeFromGridUnclustered(closest, zoom);
|
|
|
|
return;
|
|
}
|
|
|
|
//Didn't manage to cluster in at this zoom, record us as a marker here and continue upwards
|
|
gridUnclustered[zoom].addObject(layer, markerPoint);
|
|
}
|
|
|
|
//Didn't get in anything, add us to the top
|
|
this._topClusterLevel._addChild(layer);
|
|
layer.__parent = this._topClusterLevel;
|
|
return;
|
|
},
|
|
|
|
/**
|
|
* Refreshes the icon of all "dirty" visible clusters.
|
|
* Non-visible "dirty" clusters will be updated when they are added to the map.
|
|
* @private
|
|
*/
|
|
_refreshClustersIcons: function () {
|
|
this._featureGroup.eachLayer(function (c) {
|
|
if (c instanceof L.MarkerCluster && c._iconNeedsUpdate) {
|
|
c._updateIcon();
|
|
}
|
|
});
|
|
},
|
|
|
|
//Enqueue code to fire after the marker expand/contract has happened
|
|
_enqueue: function (fn) {
|
|
this._queue.push(fn);
|
|
if (!this._queueTimeout) {
|
|
this._queueTimeout = setTimeout(L.bind(this._processQueue, this), 300);
|
|
}
|
|
},
|
|
_processQueue: function () {
|
|
for (var i = 0; i < this._queue.length; i++) {
|
|
this._queue[i].call(this);
|
|
}
|
|
this._queue.length = 0;
|
|
clearTimeout(this._queueTimeout);
|
|
this._queueTimeout = null;
|
|
},
|
|
|
|
//Merge and split any existing clusters that are too big or small
|
|
_mergeSplitClusters: function () {
|
|
var mapZoom = Math.round(this._map._zoom);
|
|
|
|
//In case we are starting to split before the animation finished
|
|
this._processQueue();
|
|
|
|
if (this._zoom < mapZoom && this._currentShownBounds.intersects(this._getExpandedVisibleBounds())) { //Zoom in, split
|
|
this._animationStart();
|
|
//Remove clusters now off screen
|
|
this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), this._zoom, this._getExpandedVisibleBounds());
|
|
|
|
this._animationZoomIn(this._zoom, mapZoom);
|
|
|
|
} else if (this._zoom > mapZoom) { //Zoom out, merge
|
|
this._animationStart();
|
|
|
|
this._animationZoomOut(this._zoom, mapZoom);
|
|
} else {
|
|
this._moveEnd();
|
|
}
|
|
},
|
|
|
|
//Gets the maps visible bounds expanded in each direction by the size of the screen (so the user cannot see an area we do not cover in one pan)
|
|
_getExpandedVisibleBounds: function () {
|
|
if (!this.options.removeOutsideVisibleBounds) {
|
|
return this._mapBoundsInfinite;
|
|
} else if (L.Browser.mobile) {
|
|
return this._checkBoundsMaxLat(this._map.getBounds());
|
|
}
|
|
|
|
return this._checkBoundsMaxLat(this._map.getBounds().pad(1)); // Padding expands the bounds by its own dimensions but scaled with the given factor.
|
|
},
|
|
|
|
/**
|
|
* Expands the latitude to Infinity (or -Infinity) if the input bounds reach the map projection maximum defined latitude
|
|
* (in the case of Web/Spherical Mercator, it is 85.0511287798 / see https://en.wikipedia.org/wiki/Web_Mercator#Formulas).
|
|
* Otherwise, the removeOutsideVisibleBounds option will remove markers beyond that limit, whereas the same markers without
|
|
* this option (or outside MCG) will have their position floored (ceiled) by the projection and rendered at that limit,
|
|
* making the user think that MCG "eats" them and never displays them again.
|
|
* @param bounds L.LatLngBounds
|
|
* @returns {L.LatLngBounds}
|
|
* @private
|
|
*/
|
|
_checkBoundsMaxLat: function (bounds) {
|
|
var maxLat = this._maxLat;
|
|
|
|
if (maxLat !== undefined) {
|
|
if (bounds.getNorth() >= maxLat) {
|
|
bounds._northEast.lat = Infinity;
|
|
}
|
|
if (bounds.getSouth() <= -maxLat) {
|
|
bounds._southWest.lat = -Infinity;
|
|
}
|
|
}
|
|
|
|
return bounds;
|
|
},
|
|
|
|
//Shared animation code
|
|
_animationAddLayerNonAnimated: function (layer, newCluster) {
|
|
if (newCluster === layer) {
|
|
this._featureGroup.addLayer(layer);
|
|
} else if (newCluster._childCount === 2) {
|
|
newCluster._addToMap();
|
|
|
|
var markers = newCluster.getAllChildMarkers();
|
|
this._featureGroup.removeLayer(markers[0]);
|
|
this._featureGroup.removeLayer(markers[1]);
|
|
} else {
|
|
newCluster._updateIcon();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Extracts individual (i.e. non-group) layers from a Layer Group.
|
|
* @param group to extract layers from.
|
|
* @param output {Array} in which to store the extracted layers.
|
|
* @returns {*|Array}
|
|
* @private
|
|
*/
|
|
_extractNonGroupLayers: function (group, output) {
|
|
var layers = group.getLayers(),
|
|
i = 0,
|
|
layer;
|
|
|
|
output = output || [];
|
|
|
|
for (; i < layers.length; i++) {
|
|
layer = layers[i];
|
|
|
|
if (layer instanceof L.LayerGroup) {
|
|
this._extractNonGroupLayers(layer, output);
|
|
continue;
|
|
}
|
|
|
|
output.push(layer);
|
|
}
|
|
|
|
return output;
|
|
},
|
|
|
|
/**
|
|
* Implements the singleMarkerMode option.
|
|
* @param layer Marker to re-style using the Clusters iconCreateFunction.
|
|
* @returns {L.Icon} The newly created icon.
|
|
* @private
|
|
*/
|
|
_overrideMarkerIcon: function (layer) {
|
|
var icon = layer.options.icon = this.options.iconCreateFunction({
|
|
getChildCount: function () {
|
|
return 1;
|
|
},
|
|
getAllChildMarkers: function () {
|
|
return [layer];
|
|
}
|
|
});
|
|
|
|
return icon;
|
|
}
|
|
});
|
|
|
|
// Constant bounds used in case option "removeOutsideVisibleBounds" is set to false.
|
|
L.MarkerClusterGroup.include({
|
|
_mapBoundsInfinite: new L.LatLngBounds(new L.LatLng(-Infinity, -Infinity), new L.LatLng(Infinity, Infinity))
|
|
});
|
|
|
|
L.MarkerClusterGroup.include({
|
|
_noAnimation: {
|
|
//Non Animated versions of everything
|
|
_animationStart: function () {
|
|
//Do nothing...
|
|
},
|
|
_animationZoomIn: function (previousZoomLevel, newZoomLevel) {
|
|
this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel);
|
|
this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
|
|
|
|
//We didn't actually animate, but we use this event to mean "clustering animations have finished"
|
|
this.fire('animationend');
|
|
},
|
|
_animationZoomOut: function (previousZoomLevel, newZoomLevel) {
|
|
this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel);
|
|
this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
|
|
|
|
//We didn't actually animate, but we use this event to mean "clustering animations have finished"
|
|
this.fire('animationend');
|
|
},
|
|
_animationAddLayer: function (layer, newCluster) {
|
|
this._animationAddLayerNonAnimated(layer, newCluster);
|
|
}
|
|
},
|
|
|
|
_withAnimation: {
|
|
//Animated versions here
|
|
_animationStart: function () {
|
|
this._map._mapPane.className += ' leaflet-cluster-anim';
|
|
this._inZoomAnimation++;
|
|
},
|
|
|
|
_animationZoomIn: function (previousZoomLevel, newZoomLevel) {
|
|
var bounds = this._getExpandedVisibleBounds(),
|
|
fg = this._featureGroup,
|
|
minZoom = Math.floor(this._map.getMinZoom()),
|
|
i;
|
|
|
|
this._ignoreMove = true;
|
|
|
|
//Add all children of current clusters to map and remove those clusters from map
|
|
this._topClusterLevel._recursively(bounds, previousZoomLevel, minZoom, function (c) {
|
|
var startPos = c._latlng,
|
|
markers = c._markers,
|
|
m;
|
|
|
|
if (!bounds.contains(startPos)) {
|
|
startPos = null;
|
|
}
|
|
|
|
if (c._isSingleParent() && previousZoomLevel + 1 === newZoomLevel) { //Immediately add the new child and remove us
|
|
fg.removeLayer(c);
|
|
c._recursivelyAddChildrenToMap(null, newZoomLevel, bounds);
|
|
} else {
|
|
//Fade out old cluster
|
|
c.clusterHide();
|
|
c._recursivelyAddChildrenToMap(startPos, newZoomLevel, bounds);
|
|
}
|
|
|
|
//Remove all markers that aren't visible any more
|
|
//TODO: Do we actually need to do this on the higher levels too?
|
|
for (i = markers.length - 1; i >= 0; i--) {
|
|
m = markers[i];
|
|
if (!bounds.contains(m._latlng)) {
|
|
fg.removeLayer(m);
|
|
}
|
|
}
|
|
|
|
});
|
|
|
|
this._forceLayout();
|
|
|
|
//Update opacities
|
|
this._topClusterLevel._recursivelyBecomeVisible(bounds, newZoomLevel);
|
|
//TODO Maybe? Update markers in _recursivelyBecomeVisible
|
|
fg.eachLayer(function (n) {
|
|
if (!(n instanceof L.MarkerCluster) && n._icon) {
|
|
n.clusterShow();
|
|
}
|
|
});
|
|
|
|
//update the positions of the just added clusters/markers
|
|
this._topClusterLevel._recursively(bounds, previousZoomLevel, newZoomLevel, function (c) {
|
|
c._recursivelyRestoreChildPositions(newZoomLevel);
|
|
});
|
|
|
|
this._ignoreMove = false;
|
|
|
|
//Remove the old clusters and close the zoom animation
|
|
this._enqueue(function () {
|
|
//update the positions of the just added clusters/markers
|
|
this._topClusterLevel._recursively(bounds, previousZoomLevel, minZoom, function (c) {
|
|
fg.removeLayer(c);
|
|
c.clusterShow();
|
|
});
|
|
|
|
this._animationEnd();
|
|
});
|
|
},
|
|
|
|
_animationZoomOut: function (previousZoomLevel, newZoomLevel) {
|
|
this._animationZoomOutSingle(this._topClusterLevel, previousZoomLevel - 1, newZoomLevel);
|
|
|
|
//Need to add markers for those that weren't on the map before but are now
|
|
this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
|
|
//Remove markers that were on the map before but won't be now
|
|
this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel, this._getExpandedVisibleBounds());
|
|
},
|
|
|
|
_animationAddLayer: function (layer, newCluster) {
|
|
var me = this,
|
|
fg = this._featureGroup;
|
|
|
|
fg.addLayer(layer);
|
|
if (newCluster !== layer) {
|
|
if (newCluster._childCount > 2) { //Was already a cluster
|
|
|
|
newCluster._updateIcon();
|
|
this._forceLayout();
|
|
this._animationStart();
|
|
|
|
layer._setPos(this._map.latLngToLayerPoint(newCluster.getLatLng()));
|
|
layer.clusterHide();
|
|
|
|
this._enqueue(function () {
|
|
fg.removeLayer(layer);
|
|
layer.clusterShow();
|
|
|
|
me._animationEnd();
|
|
});
|
|
|
|
} else { //Just became a cluster
|
|
this._forceLayout();
|
|
|
|
me._animationStart();
|
|
me._animationZoomOutSingle(newCluster, this._map.getMaxZoom(), this._zoom);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
// Private methods for animated versions.
|
|
_animationZoomOutSingle: function (cluster, previousZoomLevel, newZoomLevel) {
|
|
var bounds = this._getExpandedVisibleBounds(),
|
|
minZoom = Math.floor(this._map.getMinZoom());
|
|
|
|
//Animate all of the markers in the clusters to move to their cluster center point
|
|
cluster._recursivelyAnimateChildrenInAndAddSelfToMap(bounds, minZoom, previousZoomLevel + 1, newZoomLevel);
|
|
|
|
var me = this;
|
|
|
|
//Update the opacity (If we immediately set it they won't animate)
|
|
this._forceLayout();
|
|
cluster._recursivelyBecomeVisible(bounds, newZoomLevel);
|
|
|
|
//TODO: Maybe use the transition timing stuff to make this more reliable
|
|
//When the animations are done, tidy up
|
|
this._enqueue(function () {
|
|
|
|
//This cluster stopped being a cluster before the timeout fired
|
|
if (cluster._childCount === 1) {
|
|
var m = cluster._markers[0];
|
|
//If we were in a cluster animation at the time then the opacity and position of our child could be wrong now, so fix it
|
|
this._ignoreMove = true;
|
|
m.setLatLng(m.getLatLng());
|
|
this._ignoreMove = false;
|
|
if (m.clusterShow) {
|
|
m.clusterShow();
|
|
}
|
|
} else {
|
|
cluster._recursively(bounds, newZoomLevel, minZoom, function (c) {
|
|
c._recursivelyRemoveChildrenFromMap(bounds, minZoom, previousZoomLevel + 1);
|
|
});
|
|
}
|
|
me._animationEnd();
|
|
});
|
|
},
|
|
|
|
_animationEnd: function () {
|
|
if (this._map) {
|
|
this._map._mapPane.className = this._map._mapPane.className.replace(' leaflet-cluster-anim', '');
|
|
}
|
|
this._inZoomAnimation--;
|
|
this.fire('animationend');
|
|
},
|
|
|
|
//Force a browser layout of stuff in the map
|
|
// Should apply the current opacity and location to all elements so we can update them again for an animation
|
|
_forceLayout: function () {
|
|
//In my testing this works, infact offsetWidth of any element seems to work.
|
|
//Could loop all this._layers and do this for each _icon if it stops working
|
|
|
|
L.Util.falseFn(document.body.offsetWidth);
|
|
}
|
|
});
|
|
|
|
L.markerClusterGroup = function (options) {
|
|
return new L.MarkerClusterGroup(options);
|
|
};
|
|
|
|
var MarkerCluster = L.MarkerCluster = L.Marker.extend({
|
|
options: L.Icon.prototype.options,
|
|
|
|
initialize: function (group, zoom, a, b) {
|
|
|
|
L.Marker.prototype.initialize.call(this, a ? (a._cLatLng || a.getLatLng()) : new L.LatLng(0, 0),
|
|
{ icon: this, pane: group.options.clusterPane });
|
|
|
|
this._group = group;
|
|
this._zoom = zoom;
|
|
|
|
this._markers = [];
|
|
this._childClusters = [];
|
|
this._childCount = 0;
|
|
this._iconNeedsUpdate = true;
|
|
this._boundsNeedUpdate = true;
|
|
|
|
this._bounds = new L.LatLngBounds();
|
|
|
|
if (a) {
|
|
this._addChild(a);
|
|
}
|
|
if (b) {
|
|
this._addChild(b);
|
|
}
|
|
},
|
|
|
|
//Recursively retrieve all child markers of this cluster
|
|
getAllChildMarkers: function (storageArray, ignoreDraggedMarker) {
|
|
storageArray = storageArray || [];
|
|
|
|
for (var i = this._childClusters.length - 1; i >= 0; i--) {
|
|
this._childClusters[i].getAllChildMarkers(storageArray);
|
|
}
|
|
|
|
for (var j = this._markers.length - 1; j >= 0; j--) {
|
|
if (ignoreDraggedMarker && this._markers[j].__dragStart) {
|
|
continue;
|
|
}
|
|
storageArray.push(this._markers[j]);
|
|
}
|
|
|
|
return storageArray;
|
|
},
|
|
|
|
//Returns the count of how many child markers we have
|
|
getChildCount: function () {
|
|
return this._childCount;
|
|
},
|
|
|
|
//Zoom to the minimum of showing all of the child markers, or the extents of this cluster
|
|
zoomToBounds: function (fitBoundsOptions) {
|
|
var childClusters = this._childClusters.slice(),
|
|
map = this._group._map,
|
|
boundsZoom = map.getBoundsZoom(this._bounds),
|
|
zoom = this._zoom + 1,
|
|
mapZoom = map.getZoom(),
|
|
i;
|
|
|
|
//calculate how far we need to zoom down to see all of the markers
|
|
while (childClusters.length > 0 && boundsZoom > zoom) {
|
|
zoom++;
|
|
var newClusters = [];
|
|
for (i = 0; i < childClusters.length; i++) {
|
|
newClusters = newClusters.concat(childClusters[i]._childClusters);
|
|
}
|
|
childClusters = newClusters;
|
|
}
|
|
|
|
if (boundsZoom > zoom) {
|
|
this._group._map.setView(this._latlng, zoom);
|
|
} else if (boundsZoom <= mapZoom) { //If fitBounds wouldn't zoom us down, zoom us down instead
|
|
this._group._map.setView(this._latlng, mapZoom + 1);
|
|
} else {
|
|
this._group._map.fitBounds(this._bounds, fitBoundsOptions);
|
|
}
|
|
},
|
|
|
|
getBounds: function () {
|
|
var bounds = new L.LatLngBounds();
|
|
bounds.extend(this._bounds);
|
|
return bounds;
|
|
},
|
|
|
|
_updateIcon: function () {
|
|
this._iconNeedsUpdate = true;
|
|
if (this._icon) {
|
|
this.setIcon(this);
|
|
}
|
|
},
|
|
|
|
//Cludge for Icon, we pretend to be an icon for performance
|
|
createIcon: function () {
|
|
if (this._iconNeedsUpdate) {
|
|
this._iconObj = this._group.options.iconCreateFunction(this);
|
|
this._iconNeedsUpdate = false;
|
|
}
|
|
return this._iconObj.createIcon();
|
|
},
|
|
createShadow: function () {
|
|
return this._iconObj.createShadow();
|
|
},
|
|
|
|
|
|
_addChild: function (new1, isNotificationFromChild) {
|
|
|
|
this._iconNeedsUpdate = true;
|
|
|
|
this._boundsNeedUpdate = true;
|
|
this._setClusterCenter(new1);
|
|
|
|
if (new1 instanceof L.MarkerCluster) {
|
|
if (!isNotificationFromChild) {
|
|
this._childClusters.push(new1);
|
|
new1.__parent = this;
|
|
}
|
|
this._childCount += new1._childCount;
|
|
} else {
|
|
if (!isNotificationFromChild) {
|
|
this._markers.push(new1);
|
|
}
|
|
this._childCount++;
|
|
}
|
|
|
|
if (this.__parent) {
|
|
this.__parent._addChild(new1, true);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Makes sure the cluster center is set. If not, uses the child center if it is a cluster, or the marker position.
|
|
* @param child L.MarkerCluster|L.Marker that will be used as cluster center if not defined yet.
|
|
* @private
|
|
*/
|
|
_setClusterCenter: function (child) {
|
|
if (!this._cLatLng) {
|
|
// when clustering, take position of the first point as the cluster center
|
|
this._cLatLng = child._cLatLng || child._latlng;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Assigns impossible bounding values so that the next extend entirely determines the new bounds.
|
|
* This method avoids having to trash the previous L.LatLngBounds object and to create a new one, which is much slower for this class.
|
|
* As long as the bounds are not extended, most other methods would probably fail, as they would with bounds initialized but not extended.
|
|
* @private
|
|
*/
|
|
_resetBounds: function () {
|
|
var bounds = this._bounds;
|
|
|
|
if (bounds._southWest) {
|
|
bounds._southWest.lat = Infinity;
|
|
bounds._southWest.lng = Infinity;
|
|
}
|
|
if (bounds._northEast) {
|
|
bounds._northEast.lat = -Infinity;
|
|
bounds._northEast.lng = -Infinity;
|
|
}
|
|
},
|
|
|
|
_recalculateBounds: function () {
|
|
var markers = this._markers,
|
|
childClusters = this._childClusters,
|
|
latSum = 0,
|
|
lngSum = 0,
|
|
totalCount = this._childCount,
|
|
i, child, childLatLng, childCount;
|
|
|
|
// Case where all markers are removed from the map and we are left with just an empty _topClusterLevel.
|
|
if (totalCount === 0) {
|
|
return;
|
|
}
|
|
|
|
// Reset rather than creating a new object, for performance.
|
|
this._resetBounds();
|
|
|
|
// Child markers.
|
|
for (i = 0; i < markers.length; i++) {
|
|
childLatLng = markers[i]._latlng;
|
|
|
|
this._bounds.extend(childLatLng);
|
|
|
|
latSum += childLatLng.lat;
|
|
lngSum += childLatLng.lng;
|
|
}
|
|
|
|
// Child clusters.
|
|
for (i = 0; i < childClusters.length; i++) {
|
|
child = childClusters[i];
|
|
|
|
// Re-compute child bounds and weighted position first if necessary.
|
|
if (child._boundsNeedUpdate) {
|
|
child._recalculateBounds();
|
|
}
|
|
|
|
this._bounds.extend(child._bounds);
|
|
|
|
childLatLng = child._wLatLng;
|
|
childCount = child._childCount;
|
|
|
|
latSum += childLatLng.lat * childCount;
|
|
lngSum += childLatLng.lng * childCount;
|
|
}
|
|
|
|
this._latlng = this._wLatLng = new L.LatLng(latSum / totalCount, lngSum / totalCount);
|
|
|
|
// Reset dirty flag.
|
|
this._boundsNeedUpdate = false;
|
|
},
|
|
|
|
//Set our markers position as given and add it to the map
|
|
_addToMap: function (startPos) {
|
|
if (startPos) {
|
|
this._backupLatlng = this._latlng;
|
|
this.setLatLng(startPos);
|
|
}
|
|
this._group._featureGroup.addLayer(this);
|
|
},
|
|
|
|
_recursivelyAnimateChildrenIn: function (bounds, center, maxZoom) {
|
|
this._recursively(bounds, this._group._map.getMinZoom(), maxZoom - 1,
|
|
function (c) {
|
|
var markers = c._markers,
|
|
i, m;
|
|
for (i = markers.length - 1; i >= 0; i--) {
|
|
m = markers[i];
|
|
|
|
//Only do it if the icon is still on the map
|
|
if (m._icon) {
|
|
m._setPos(center);
|
|
m.clusterHide();
|
|
}
|
|
}
|
|
},
|
|
function (c) {
|
|
var childClusters = c._childClusters,
|
|
j, cm;
|
|
for (j = childClusters.length - 1; j >= 0; j--) {
|
|
cm = childClusters[j];
|
|
if (cm._icon) {
|
|
cm._setPos(center);
|
|
cm.clusterHide();
|
|
}
|
|
}
|
|
}
|
|
);
|
|
},
|
|
|
|
_recursivelyAnimateChildrenInAndAddSelfToMap: function (bounds, mapMinZoom, previousZoomLevel, newZoomLevel) {
|
|
this._recursively(bounds, newZoomLevel, mapMinZoom,
|
|
function (c) {
|
|
c._recursivelyAnimateChildrenIn(bounds, c._group._map.latLngToLayerPoint(c.getLatLng()).round(), previousZoomLevel);
|
|
|
|
//TODO: depthToAnimateIn affects _isSingleParent, if there is a multizoom we may/may not be.
|
|
//As a hack we only do a animation free zoom on a single level zoom, if someone does multiple levels then we always animate
|
|
if (c._isSingleParent() && previousZoomLevel - 1 === newZoomLevel) {
|
|
c.clusterShow();
|
|
c._recursivelyRemoveChildrenFromMap(bounds, mapMinZoom, previousZoomLevel); //Immediately remove our children as we are replacing them. TODO previousBounds not bounds
|
|
} else {
|
|
c.clusterHide();
|
|
}
|
|
|
|
c._addToMap();
|
|
}
|
|
);
|
|
},
|
|
|
|
_recursivelyBecomeVisible: function (bounds, zoomLevel) {
|
|
this._recursively(bounds, this._group._map.getMinZoom(), zoomLevel, null, function (c) {
|
|
c.clusterShow();
|
|
});
|
|
},
|
|
|
|
_recursivelyAddChildrenToMap: function (startPos, zoomLevel, bounds) {
|
|
this._recursively(bounds, this._group._map.getMinZoom() - 1, zoomLevel,
|
|
function (c) {
|
|
if (zoomLevel === c._zoom) {
|
|
return;
|
|
}
|
|
|
|
//Add our child markers at startPos (so they can be animated out)
|
|
for (var i = c._markers.length - 1; i >= 0; i--) {
|
|
var nm = c._markers[i];
|
|
|
|
if (!bounds.contains(nm._latlng)) {
|
|
continue;
|
|
}
|
|
|
|
if (startPos) {
|
|
nm._backupLatlng = nm.getLatLng();
|
|
|
|
nm.setLatLng(startPos);
|
|
if (nm.clusterHide) {
|
|
nm.clusterHide();
|
|
}
|
|
}
|
|
|
|
c._group._featureGroup.addLayer(nm);
|
|
}
|
|
},
|
|
function (c) {
|
|
c._addToMap(startPos);
|
|
}
|
|
);
|
|
},
|
|
|
|
_recursivelyRestoreChildPositions: function (zoomLevel) {
|
|
//Fix positions of child markers
|
|
for (var i = this._markers.length - 1; i >= 0; i--) {
|
|
var nm = this._markers[i];
|
|
if (nm._backupLatlng) {
|
|
nm.setLatLng(nm._backupLatlng);
|
|
delete nm._backupLatlng;
|
|
}
|
|
}
|
|
|
|
if (zoomLevel - 1 === this._zoom) {
|
|
//Reposition child clusters
|
|
for (var j = this._childClusters.length - 1; j >= 0; j--) {
|
|
this._childClusters[j]._restorePosition();
|
|
}
|
|
} else {
|
|
for (var k = this._childClusters.length - 1; k >= 0; k--) {
|
|
this._childClusters[k]._recursivelyRestoreChildPositions(zoomLevel);
|
|
}
|
|
}
|
|
},
|
|
|
|
_restorePosition: function () {
|
|
if (this._backupLatlng) {
|
|
this.setLatLng(this._backupLatlng);
|
|
delete this._backupLatlng;
|
|
}
|
|
},
|
|
|
|
//exceptBounds: If set, don't remove any markers/clusters in it
|
|
_recursivelyRemoveChildrenFromMap: function (previousBounds, mapMinZoom, zoomLevel, exceptBounds) {
|
|
var m, i;
|
|
this._recursively(previousBounds, mapMinZoom - 1, zoomLevel - 1,
|
|
function (c) {
|
|
//Remove markers at every level
|
|
for (i = c._markers.length - 1; i >= 0; i--) {
|
|
m = c._markers[i];
|
|
if (!exceptBounds || !exceptBounds.contains(m._latlng)) {
|
|
c._group._featureGroup.removeLayer(m);
|
|
if (m.clusterShow) {
|
|
m.clusterShow();
|
|
}
|
|
}
|
|
}
|
|
},
|
|
function (c) {
|
|
//Remove child clusters at just the bottom level
|
|
for (i = c._childClusters.length - 1; i >= 0; i--) {
|
|
m = c._childClusters[i];
|
|
if (!exceptBounds || !exceptBounds.contains(m._latlng)) {
|
|
c._group._featureGroup.removeLayer(m);
|
|
if (m.clusterShow) {
|
|
m.clusterShow();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
);
|
|
},
|
|
|
|
//Run the given functions recursively to this and child clusters
|
|
// boundsToApplyTo: a L.LatLngBounds representing the bounds of what clusters to recurse in to
|
|
// zoomLevelToStart: zoom level to start running functions (inclusive)
|
|
// zoomLevelToStop: zoom level to stop running functions (inclusive)
|
|
// runAtEveryLevel: function that takes an L.MarkerCluster as an argument that should be applied on every level
|
|
// runAtBottomLevel: function that takes an L.MarkerCluster as an argument that should be applied at only the bottom level
|
|
_recursively: function (boundsToApplyTo, zoomLevelToStart, zoomLevelToStop, runAtEveryLevel, runAtBottomLevel) {
|
|
var childClusters = this._childClusters,
|
|
zoom = this._zoom,
|
|
i, c;
|
|
|
|
if (zoomLevelToStart <= zoom) {
|
|
if (runAtEveryLevel) {
|
|
runAtEveryLevel(this);
|
|
}
|
|
if (runAtBottomLevel && zoom === zoomLevelToStop) {
|
|
runAtBottomLevel(this);
|
|
}
|
|
}
|
|
|
|
if (zoom < zoomLevelToStart || zoom < zoomLevelToStop) {
|
|
for (i = childClusters.length - 1; i >= 0; i--) {
|
|
c = childClusters[i];
|
|
if (c._boundsNeedUpdate) {
|
|
c._recalculateBounds();
|
|
}
|
|
if (boundsToApplyTo.intersects(c._bounds)) {
|
|
c._recursively(boundsToApplyTo, zoomLevelToStart, zoomLevelToStop, runAtEveryLevel, runAtBottomLevel);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
//Returns true if we are the parent of only one cluster and that cluster is the same as us
|
|
_isSingleParent: function () {
|
|
//Don't need to check this._markers as the rest won't work if there are any
|
|
return this._childClusters.length > 0 && this._childClusters[0]._childCount === this._childCount;
|
|
}
|
|
});
|
|
|
|
/*
|
|
* Extends L.Marker to include two extra methods: clusterHide and clusterShow.
|
|
*
|
|
* They work as setOpacity(0) and setOpacity(1) respectively, but
|
|
* don't overwrite the options.opacity
|
|
*
|
|
*/
|
|
|
|
L.Marker.include({
|
|
clusterHide: function () {
|
|
var backup = this.options.opacity;
|
|
this.setOpacity(0);
|
|
this.options.opacity = backup;
|
|
return this;
|
|
},
|
|
|
|
clusterShow: function () {
|
|
return this.setOpacity(this.options.opacity);
|
|
}
|
|
});
|
|
|
|
L.DistanceGrid = function (cellSize) {
|
|
this._cellSize = cellSize;
|
|
this._sqCellSize = cellSize * cellSize;
|
|
this._grid = {};
|
|
this._objectPoint = { };
|
|
};
|
|
|
|
L.DistanceGrid.prototype = {
|
|
|
|
addObject: function (obj, point) {
|
|
var x = this._getCoord(point.x),
|
|
y = this._getCoord(point.y),
|
|
grid = this._grid,
|
|
row = grid[y] = grid[y] || {},
|
|
cell = row[x] = row[x] || [],
|
|
stamp = L.Util.stamp(obj);
|
|
|
|
this._objectPoint[stamp] = point;
|
|
|
|
cell.push(obj);
|
|
},
|
|
|
|
updateObject: function (obj, point) {
|
|
this.removeObject(obj);
|
|
this.addObject(obj, point);
|
|
},
|
|
|
|
//Returns true if the object was found
|
|
removeObject: function (obj, point) {
|
|
var x = this._getCoord(point.x),
|
|
y = this._getCoord(point.y),
|
|
grid = this._grid,
|
|
row = grid[y] = grid[y] || {},
|
|
cell = row[x] = row[x] || [],
|
|
i, len;
|
|
|
|
delete this._objectPoint[L.Util.stamp(obj)];
|
|
|
|
for (i = 0, len = cell.length; i < len; i++) {
|
|
if (cell[i] === obj) {
|
|
|
|
cell.splice(i, 1);
|
|
|
|
if (len === 1) {
|
|
delete row[x];
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
eachObject: function (fn, context) {
|
|
var i, j, k, len, row, cell, removed,
|
|
grid = this._grid;
|
|
|
|
for (i in grid) {
|
|
row = grid[i];
|
|
|
|
for (j in row) {
|
|
cell = row[j];
|
|
|
|
for (k = 0, len = cell.length; k < len; k++) {
|
|
removed = fn.call(context, cell[k]);
|
|
if (removed) {
|
|
k--;
|
|
len--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
getNearObject: function (point) {
|
|
var x = this._getCoord(point.x),
|
|
y = this._getCoord(point.y),
|
|
i, j, k, row, cell, len, obj, dist,
|
|
objectPoint = this._objectPoint,
|
|
closestDistSq = this._sqCellSize,
|
|
closest = null;
|
|
|
|
for (i = y - 1; i <= y + 1; i++) {
|
|
row = this._grid[i];
|
|
if (row) {
|
|
|
|
for (j = x - 1; j <= x + 1; j++) {
|
|
cell = row[j];
|
|
if (cell) {
|
|
|
|
for (k = 0, len = cell.length; k < len; k++) {
|
|
obj = cell[k];
|
|
dist = this._sqDist(objectPoint[L.Util.stamp(obj)], point);
|
|
if (dist < closestDistSq ||
|
|
dist <= closestDistSq && closest === null) {
|
|
closestDistSq = dist;
|
|
closest = obj;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return closest;
|
|
},
|
|
|
|
_getCoord: function (x) {
|
|
var coord = Math.floor(x / this._cellSize);
|
|
return isFinite(coord) ? coord : x;
|
|
},
|
|
|
|
_sqDist: function (p, p2) {
|
|
var dx = p2.x - p.x,
|
|
dy = p2.y - p.y;
|
|
return dx * dx + dy * dy;
|
|
}
|
|
};
|
|
|
|
/* Copyright (c) 2012 the authors listed at the following URL, and/or
|
|
the authors of referenced articles or incorporated external code:
|
|
http://en.literateprograms.org/Quickhull_(Javascript)?action=history&offset=20120410175256
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
Retrieved from: http://en.literateprograms.org/Quickhull_(Javascript)?oldid=18434
|
|
*/
|
|
|
|
(function () {
|
|
L.QuickHull = {
|
|
|
|
/*
|
|
* @param {Object} cpt a point to be measured from the baseline
|
|
* @param {Array} bl the baseline, as represented by a two-element
|
|
* array of latlng objects.
|
|
* @returns {Number} an approximate distance measure
|
|
*/
|
|
getDistant: function (cpt, bl) {
|
|
var vY = bl[1].lat - bl[0].lat,
|
|
vX = bl[0].lng - bl[1].lng;
|
|
return (vX * (cpt.lat - bl[0].lat) + vY * (cpt.lng - bl[0].lng));
|
|
},
|
|
|
|
/*
|
|
* @param {Array} baseLine a two-element array of latlng objects
|
|
* representing the baseline to project from
|
|
* @param {Array} latLngs an array of latlng objects
|
|
* @returns {Object} the maximum point and all new points to stay
|
|
* in consideration for the hull.
|
|
*/
|
|
findMostDistantPointFromBaseLine: function (baseLine, latLngs) {
|
|
var maxD = 0,
|
|
maxPt = null,
|
|
newPoints = [],
|
|
i, pt, d;
|
|
|
|
for (i = latLngs.length - 1; i >= 0; i--) {
|
|
pt = latLngs[i];
|
|
d = this.getDistant(pt, baseLine);
|
|
|
|
if (d > 0) {
|
|
newPoints.push(pt);
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
if (d > maxD) {
|
|
maxD = d;
|
|
maxPt = pt;
|
|
}
|
|
}
|
|
|
|
return { maxPoint: maxPt, newPoints: newPoints };
|
|
},
|
|
|
|
|
|
/*
|
|
* Given a baseline, compute the convex hull of latLngs as an array
|
|
* of latLngs.
|
|
*
|
|
* @param {Array} latLngs
|
|
* @returns {Array}
|
|
*/
|
|
buildConvexHull: function (baseLine, latLngs) {
|
|
var convexHullBaseLines = [],
|
|
t = this.findMostDistantPointFromBaseLine(baseLine, latLngs);
|
|
|
|
if (t.maxPoint) { // if there is still a point "outside" the base line
|
|
convexHullBaseLines =
|
|
convexHullBaseLines.concat(
|
|
this.buildConvexHull([baseLine[0], t.maxPoint], t.newPoints)
|
|
);
|
|
convexHullBaseLines =
|
|
convexHullBaseLines.concat(
|
|
this.buildConvexHull([t.maxPoint, baseLine[1]], t.newPoints)
|
|
);
|
|
return convexHullBaseLines;
|
|
} else { // if there is no more point "outside" the base line, the current base line is part of the convex hull
|
|
return [baseLine[0]];
|
|
}
|
|
},
|
|
|
|
/*
|
|
* Given an array of latlngs, compute a convex hull as an array
|
|
* of latlngs
|
|
*
|
|
* @param {Array} latLngs
|
|
* @returns {Array}
|
|
*/
|
|
getConvexHull: function (latLngs) {
|
|
// find first baseline
|
|
var maxLat = false, minLat = false,
|
|
maxLng = false, minLng = false,
|
|
maxLatPt = null, minLatPt = null,
|
|
maxLngPt = null, minLngPt = null,
|
|
maxPt = null, minPt = null,
|
|
i;
|
|
|
|
for (i = latLngs.length - 1; i >= 0; i--) {
|
|
var pt = latLngs[i];
|
|
if (maxLat === false || pt.lat > maxLat) {
|
|
maxLatPt = pt;
|
|
maxLat = pt.lat;
|
|
}
|
|
if (minLat === false || pt.lat < minLat) {
|
|
minLatPt = pt;
|
|
minLat = pt.lat;
|
|
}
|
|
if (maxLng === false || pt.lng > maxLng) {
|
|
maxLngPt = pt;
|
|
maxLng = pt.lng;
|
|
}
|
|
if (minLng === false || pt.lng < minLng) {
|
|
minLngPt = pt;
|
|
minLng = pt.lng;
|
|
}
|
|
}
|
|
|
|
if (minLat !== maxLat) {
|
|
minPt = minLatPt;
|
|
maxPt = maxLatPt;
|
|
} else {
|
|
minPt = minLngPt;
|
|
maxPt = maxLngPt;
|
|
}
|
|
|
|
var ch = [].concat(this.buildConvexHull([minPt, maxPt], latLngs),
|
|
this.buildConvexHull([maxPt, minPt], latLngs));
|
|
return ch;
|
|
}
|
|
};
|
|
}());
|
|
|
|
L.MarkerCluster.include({
|
|
getConvexHull: function () {
|
|
var childMarkers = this.getAllChildMarkers(),
|
|
points = [],
|
|
p, i;
|
|
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
p = childMarkers[i].getLatLng();
|
|
points.push(p);
|
|
}
|
|
|
|
return L.QuickHull.getConvexHull(points);
|
|
}
|
|
});
|
|
|
|
//This code is 100% based on https://github.com/jawj/OverlappingMarkerSpiderfier-Leaflet
|
|
//Huge thanks to jawj for implementing it first to make my job easy :-)
|
|
|
|
L.MarkerCluster.include({
|
|
|
|
_2PI: Math.PI * 2,
|
|
_circleFootSeparation: 25, //related to circumference of circle
|
|
_circleStartAngle: 0,
|
|
|
|
_spiralFootSeparation: 28, //related to size of spiral (experiment!)
|
|
_spiralLengthStart: 11,
|
|
_spiralLengthFactor: 5,
|
|
|
|
_circleSpiralSwitchover: 9, //show spiral instead of circle from this marker count upwards.
|
|
// 0 -> always spiral; Infinity -> always circle
|
|
|
|
spiderfy: function () {
|
|
if (this._group._spiderfied === this || this._group._inZoomAnimation) {
|
|
return;
|
|
}
|
|
|
|
var childMarkers = this.getAllChildMarkers(null, true),
|
|
group = this._group,
|
|
map = group._map,
|
|
center = map.latLngToLayerPoint(this._latlng),
|
|
positions;
|
|
|
|
this._group._unspiderfy();
|
|
this._group._spiderfied = this;
|
|
|
|
//TODO Maybe: childMarkers order by distance to center
|
|
|
|
if (childMarkers.length >= this._circleSpiralSwitchover) {
|
|
positions = this._generatePointsSpiral(childMarkers.length, center);
|
|
} else {
|
|
center.y += 10; // Otherwise circles look wrong => hack for standard blue icon, renders differently for other icons.
|
|
positions = this._generatePointsCircle(childMarkers.length, center);
|
|
}
|
|
|
|
this._animationSpiderfy(childMarkers, positions);
|
|
},
|
|
|
|
unspiderfy: function (zoomDetails) {
|
|
/// <param Name="zoomDetails">Argument from zoomanim if being called in a zoom animation or null otherwise</param>
|
|
if (this._group._inZoomAnimation) {
|
|
return;
|
|
}
|
|
this._animationUnspiderfy(zoomDetails);
|
|
|
|
this._group._spiderfied = null;
|
|
},
|
|
|
|
_generatePointsCircle: function (count, centerPt) {
|
|
var circumference = this._group.options.spiderfyDistanceMultiplier * this._circleFootSeparation * (2 + count),
|
|
legLength = circumference / this._2PI, //radius from circumference
|
|
angleStep = this._2PI / count,
|
|
res = [],
|
|
i, angle;
|
|
|
|
legLength = Math.max(legLength, 35); // Minimum distance to get outside the cluster icon.
|
|
|
|
res.length = count;
|
|
|
|
for (i = 0; i < count; i++) { // Clockwise, like spiral.
|
|
angle = this._circleStartAngle + i * angleStep;
|
|
res[i] = new L.Point(centerPt.x + legLength * Math.cos(angle), centerPt.y + legLength * Math.sin(angle))._round();
|
|
}
|
|
|
|
return res;
|
|
},
|
|
|
|
_generatePointsSpiral: function (count, centerPt) {
|
|
var spiderfyDistanceMultiplier = this._group.options.spiderfyDistanceMultiplier,
|
|
legLength = spiderfyDistanceMultiplier * this._spiralLengthStart,
|
|
separation = spiderfyDistanceMultiplier * this._spiralFootSeparation,
|
|
lengthFactor = spiderfyDistanceMultiplier * this._spiralLengthFactor * this._2PI,
|
|
angle = 0,
|
|
res = [],
|
|
i;
|
|
|
|
res.length = count;
|
|
|
|
// Higher index, closer position to cluster center.
|
|
for (i = count; i >= 0; i--) {
|
|
// Skip the first position, so that we are already farther from center and we avoid
|
|
// being under the default cluster icon (especially important for Circle Markers).
|
|
if (i < count) {
|
|
res[i] = new L.Point(centerPt.x + legLength * Math.cos(angle), centerPt.y + legLength * Math.sin(angle))._round();
|
|
}
|
|
angle += separation / legLength + i * 0.0005;
|
|
legLength += lengthFactor / angle;
|
|
}
|
|
return res;
|
|
},
|
|
|
|
_noanimationUnspiderfy: function () {
|
|
var group = this._group,
|
|
map = group._map,
|
|
fg = group._featureGroup,
|
|
childMarkers = this.getAllChildMarkers(null, true),
|
|
m, i;
|
|
|
|
group._ignoreMove = true;
|
|
|
|
this.setOpacity(1);
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
m = childMarkers[i];
|
|
|
|
fg.removeLayer(m);
|
|
|
|
if (m._preSpiderfyLatlng) {
|
|
m.setLatLng(m._preSpiderfyLatlng);
|
|
delete m._preSpiderfyLatlng;
|
|
}
|
|
if (m.setZIndexOffset) {
|
|
m.setZIndexOffset(0);
|
|
}
|
|
|
|
if (m._spiderLeg) {
|
|
map.removeLayer(m._spiderLeg);
|
|
delete m._spiderLeg;
|
|
}
|
|
}
|
|
|
|
group.fire('unspiderfied', {
|
|
cluster: this,
|
|
markers: childMarkers
|
|
});
|
|
group._ignoreMove = false;
|
|
group._spiderfied = null;
|
|
}
|
|
});
|
|
|
|
//Non Animated versions of everything
|
|
L.MarkerClusterNonAnimated = L.MarkerCluster.extend({
|
|
_animationSpiderfy: function (childMarkers, positions) {
|
|
var group = this._group,
|
|
map = group._map,
|
|
fg = group._featureGroup,
|
|
legOptions = this._group.options.spiderLegPolylineOptions,
|
|
i, m, leg, newPos;
|
|
|
|
group._ignoreMove = true;
|
|
|
|
// Traverse in ascending order to make sure that inner circleMarkers are on top of further legs. Normal markers are re-ordered by newPosition.
|
|
// The reverse order trick no longer improves performance on modern browsers.
|
|
for (i = 0; i < childMarkers.length; i++) {
|
|
newPos = map.layerPointToLatLng(positions[i]);
|
|
m = childMarkers[i];
|
|
|
|
// Add the leg before the marker, so that in case the latter is a circleMarker, the leg is behind it.
|
|
leg = new L.Polyline([this._latlng, newPos], legOptions);
|
|
map.addLayer(leg);
|
|
m._spiderLeg = leg;
|
|
|
|
// Now add the marker.
|
|
m._preSpiderfyLatlng = m._latlng;
|
|
m.setLatLng(newPos);
|
|
if (m.setZIndexOffset) {
|
|
m.setZIndexOffset(1000000); //Make these appear on top of EVERYTHING
|
|
}
|
|
|
|
fg.addLayer(m);
|
|
}
|
|
this.setOpacity(0.3);
|
|
|
|
group._ignoreMove = false;
|
|
group.fire('spiderfied', {
|
|
cluster: this,
|
|
markers: childMarkers
|
|
});
|
|
},
|
|
|
|
_animationUnspiderfy: function () {
|
|
this._noanimationUnspiderfy();
|
|
}
|
|
});
|
|
|
|
//Animated versions here
|
|
L.MarkerCluster.include({
|
|
|
|
_animationSpiderfy: function (childMarkers, positions) {
|
|
var me = this,
|
|
group = this._group,
|
|
map = group._map,
|
|
fg = group._featureGroup,
|
|
thisLayerLatLng = this._latlng,
|
|
thisLayerPos = map.latLngToLayerPoint(thisLayerLatLng),
|
|
svg = L.Path.SVG,
|
|
legOptions = L.extend({}, this._group.options.spiderLegPolylineOptions), // Copy the options so that we can modify them for animation.
|
|
finalLegOpacity = legOptions.opacity,
|
|
i, m, leg, legPath, legLength, newPos;
|
|
|
|
if (finalLegOpacity === undefined) {
|
|
finalLegOpacity = L.MarkerClusterGroup.prototype.options.spiderLegPolylineOptions.opacity;
|
|
}
|
|
|
|
if (svg) {
|
|
// If the initial opacity of the spider leg is not 0 then it appears before the animation starts.
|
|
legOptions.opacity = 0;
|
|
|
|
// Add the class for CSS transitions.
|
|
legOptions.className = (legOptions.className || '') + ' leaflet-cluster-spider-leg';
|
|
} else {
|
|
// Make sure we have a defined opacity.
|
|
legOptions.opacity = finalLegOpacity;
|
|
}
|
|
|
|
group._ignoreMove = true;
|
|
|
|
// Add markers and spider legs to map, hidden at our center point.
|
|
// Traverse in ascending order to make sure that inner circleMarkers are on top of further legs. Normal markers are re-ordered by newPosition.
|
|
// The reverse order trick no longer improves performance on modern browsers.
|
|
for (i = 0; i < childMarkers.length; i++) {
|
|
m = childMarkers[i];
|
|
|
|
newPos = map.layerPointToLatLng(positions[i]);
|
|
|
|
// Add the leg before the marker, so that in case the latter is a circleMarker, the leg is behind it.
|
|
leg = new L.Polyline([thisLayerLatLng, newPos], legOptions);
|
|
map.addLayer(leg);
|
|
m._spiderLeg = leg;
|
|
|
|
// Explanations: https://jakearchibald.com/2013/animated-line-drawing-svg/
|
|
// In our case the transition property is declared in the CSS file.
|
|
if (svg) {
|
|
legPath = leg._path;
|
|
legLength = legPath.getTotalLength() + 0.1; // Need a small extra length to avoid remaining dot in Firefox.
|
|
legPath.style.strokeDasharray = legLength; // Just 1 length is enough, it will be duplicated.
|
|
legPath.style.strokeDashoffset = legLength;
|
|
}
|
|
|
|
// If it is a marker, add it now and we'll animate it out
|
|
if (m.setZIndexOffset) {
|
|
m.setZIndexOffset(1000000); // Make normal markers appear on top of EVERYTHING
|
|
}
|
|
if (m.clusterHide) {
|
|
m.clusterHide();
|
|
}
|
|
|
|
// Vectors just get immediately added
|
|
fg.addLayer(m);
|
|
|
|
if (m._setPos) {
|
|
m._setPos(thisLayerPos);
|
|
}
|
|
}
|
|
|
|
group._forceLayout();
|
|
group._animationStart();
|
|
|
|
// Reveal markers and spider legs.
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
newPos = map.layerPointToLatLng(positions[i]);
|
|
m = childMarkers[i];
|
|
|
|
//Move marker to new position
|
|
m._preSpiderfyLatlng = m._latlng;
|
|
m.setLatLng(newPos);
|
|
|
|
if (m.clusterShow) {
|
|
m.clusterShow();
|
|
}
|
|
|
|
// Animate leg (animation is actually delegated to CSS transition).
|
|
if (svg) {
|
|
leg = m._spiderLeg;
|
|
legPath = leg._path;
|
|
legPath.style.strokeDashoffset = 0;
|
|
//legPath.style.strokeOpacity = finalLegOpacity;
|
|
leg.setStyle({opacity: finalLegOpacity});
|
|
}
|
|
}
|
|
this.setOpacity(0.3);
|
|
|
|
group._ignoreMove = false;
|
|
|
|
setTimeout(function () {
|
|
group._animationEnd();
|
|
group.fire('spiderfied', {
|
|
cluster: me,
|
|
markers: childMarkers
|
|
});
|
|
}, 200);
|
|
},
|
|
|
|
_animationUnspiderfy: function (zoomDetails) {
|
|
var me = this,
|
|
group = this._group,
|
|
map = group._map,
|
|
fg = group._featureGroup,
|
|
thisLayerPos = zoomDetails ? map._latLngToNewLayerPoint(this._latlng, zoomDetails.zoom, zoomDetails.center) : map.latLngToLayerPoint(this._latlng),
|
|
childMarkers = this.getAllChildMarkers(null, true),
|
|
svg = L.Path.SVG,
|
|
m, i, leg, legPath, legLength, nonAnimatable;
|
|
|
|
group._ignoreMove = true;
|
|
group._animationStart();
|
|
|
|
//Make us visible and bring the child markers back in
|
|
this.setOpacity(1);
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
m = childMarkers[i];
|
|
|
|
//Marker was added to us after we were spiderfied
|
|
if (!m._preSpiderfyLatlng) {
|
|
continue;
|
|
}
|
|
|
|
//Close any popup on the marker first, otherwise setting the location of the marker will make the map scroll
|
|
m.closePopup();
|
|
|
|
//Fix up the location to the real one
|
|
m.setLatLng(m._preSpiderfyLatlng);
|
|
delete m._preSpiderfyLatlng;
|
|
|
|
//Hack override the location to be our center
|
|
nonAnimatable = true;
|
|
if (m._setPos) {
|
|
m._setPos(thisLayerPos);
|
|
nonAnimatable = false;
|
|
}
|
|
if (m.clusterHide) {
|
|
m.clusterHide();
|
|
nonAnimatable = false;
|
|
}
|
|
if (nonAnimatable) {
|
|
fg.removeLayer(m);
|
|
}
|
|
|
|
// Animate the spider leg back in (animation is actually delegated to CSS transition).
|
|
if (svg) {
|
|
leg = m._spiderLeg;
|
|
legPath = leg._path;
|
|
legLength = legPath.getTotalLength() + 0.1;
|
|
legPath.style.strokeDashoffset = legLength;
|
|
leg.setStyle({opacity: 0});
|
|
}
|
|
}
|
|
|
|
group._ignoreMove = false;
|
|
|
|
setTimeout(function () {
|
|
//If we have only <= one child left then that marker will be shown on the map so don't remove it!
|
|
var stillThereChildCount = 0;
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
m = childMarkers[i];
|
|
if (m._spiderLeg) {
|
|
stillThereChildCount++;
|
|
}
|
|
}
|
|
|
|
|
|
for (i = childMarkers.length - 1; i >= 0; i--) {
|
|
m = childMarkers[i];
|
|
|
|
if (!m._spiderLeg) { //Has already been unspiderfied
|
|
continue;
|
|
}
|
|
|
|
if (m.clusterShow) {
|
|
m.clusterShow();
|
|
}
|
|
if (m.setZIndexOffset) {
|
|
m.setZIndexOffset(0);
|
|
}
|
|
|
|
if (stillThereChildCount > 1) {
|
|
fg.removeLayer(m);
|
|
}
|
|
|
|
map.removeLayer(m._spiderLeg);
|
|
delete m._spiderLeg;
|
|
}
|
|
group._animationEnd();
|
|
group.fire('unspiderfied', {
|
|
cluster: me,
|
|
markers: childMarkers
|
|
});
|
|
}, 200);
|
|
}
|
|
});
|
|
|
|
|
|
L.MarkerClusterGroup.include({
|
|
//The MarkerCluster currently spiderfied (if any)
|
|
_spiderfied: null,
|
|
|
|
unspiderfy: function () {
|
|
this._unspiderfy.apply(this, arguments);
|
|
},
|
|
|
|
_spiderfierOnAdd: function () {
|
|
this._map.on('click', this._unspiderfyWrapper, this);
|
|
|
|
if (this._map.options.zoomAnimation) {
|
|
this._map.on('zoomstart', this._unspiderfyZoomStart, this);
|
|
}
|
|
//Browsers without zoomAnimation or a big zoom don't fire zoomstart
|
|
this._map.on('zoomend', this._noanimationUnspiderfy, this);
|
|
|
|
if (!L.Browser.touch) {
|
|
this._map.getRenderer(this);
|
|
//Needs to happen in the pageload, not after, or animations don't work in webkit
|
|
// http://stackoverflow.com/questions/8455200/svg-animate-with-dynamically-added-elements
|
|
//Disable on touch browsers as the animation messes up on a touch zoom and isn't very noticable
|
|
}
|
|
},
|
|
|
|
_spiderfierOnRemove: function () {
|
|
this._map.off('click', this._unspiderfyWrapper, this);
|
|
this._map.off('zoomstart', this._unspiderfyZoomStart, this);
|
|
this._map.off('zoomanim', this._unspiderfyZoomAnim, this);
|
|
this._map.off('zoomend', this._noanimationUnspiderfy, this);
|
|
|
|
//Ensure that markers are back where they should be
|
|
// Use no animation to avoid a sticky leaflet-cluster-anim class on mapPane
|
|
this._noanimationUnspiderfy();
|
|
},
|
|
|
|
//On zoom start we add a zoomanim handler so that we are guaranteed to be last (after markers are animated)
|
|
//This means we can define the animation they do rather than Markers doing an animation to their actual location
|
|
_unspiderfyZoomStart: function () {
|
|
if (!this._map) { //May have been removed from the map by a zoomEnd handler
|
|
return;
|
|
}
|
|
|
|
this._map.on('zoomanim', this._unspiderfyZoomAnim, this);
|
|
},
|
|
|
|
_unspiderfyZoomAnim: function (zoomDetails) {
|
|
//Wait until the first zoomanim after the user has finished touch-zooming before running the animation
|
|
if (L.DomUtil.hasClass(this._map._mapPane, 'leaflet-touching')) {
|
|
return;
|
|
}
|
|
|
|
this._map.off('zoomanim', this._unspiderfyZoomAnim, this);
|
|
this._unspiderfy(zoomDetails);
|
|
},
|
|
|
|
_unspiderfyWrapper: function () {
|
|
/// <summary>_unspiderfy but passes no arguments</summary>
|
|
this._unspiderfy();
|
|
},
|
|
|
|
_unspiderfy: function (zoomDetails) {
|
|
if (this._spiderfied) {
|
|
this._spiderfied.unspiderfy(zoomDetails);
|
|
}
|
|
},
|
|
|
|
_noanimationUnspiderfy: function () {
|
|
if (this._spiderfied) {
|
|
this._spiderfied._noanimationUnspiderfy();
|
|
}
|
|
},
|
|
|
|
//If the given layer is currently being spiderfied then we unspiderfy it so it isn't on the map anymore etc
|
|
_unspiderfyLayer: function (layer) {
|
|
if (layer._spiderLeg) {
|
|
this._featureGroup.removeLayer(layer);
|
|
|
|
if (layer.clusterShow) {
|
|
layer.clusterShow();
|
|
}
|
|
//Position will be fixed up immediately in _animationUnspiderfy
|
|
if (layer.setZIndexOffset) {
|
|
layer.setZIndexOffset(0);
|
|
}
|
|
|
|
this._map.removeLayer(layer._spiderLeg);
|
|
delete layer._spiderLeg;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Adds 1 public method to MCG and 1 to L.Marker to facilitate changing
|
|
* markers' icon options and refreshing their icon and their parent clusters
|
|
* accordingly (case where their iconCreateFunction uses data of childMarkers
|
|
* to make up the cluster icon).
|
|
*/
|
|
|
|
|
|
L.MarkerClusterGroup.include({
|
|
/**
|
|
* Updates the icon of all clusters which are parents of the given marker(s).
|
|
* In singleMarkerMode, also updates the given marker(s) icon.
|
|
* @param layers L.MarkerClusterGroup|L.LayerGroup|Array(L.Marker)|Map(L.Marker)|
|
|
* L.MarkerCluster|L.Marker (optional) list of markers (or single marker) whose parent
|
|
* clusters need to be updated. If not provided, retrieves all child markers of this.
|
|
* @returns {L.MarkerClusterGroup}
|
|
*/
|
|
refreshClusters: function (layers) {
|
|
if (!layers) {
|
|
layers = this._topClusterLevel.getAllChildMarkers();
|
|
} else if (layers instanceof L.MarkerClusterGroup) {
|
|
layers = layers._topClusterLevel.getAllChildMarkers();
|
|
} else if (layers instanceof L.LayerGroup) {
|
|
layers = layers._layers;
|
|
} else if (layers instanceof L.MarkerCluster) {
|
|
layers = layers.getAllChildMarkers();
|
|
} else if (layers instanceof L.Marker) {
|
|
layers = [layers];
|
|
} // else: must be an Array(L.Marker)|Map(L.Marker)
|
|
this._flagParentsIconsNeedUpdate(layers);
|
|
this._refreshClustersIcons();
|
|
|
|
// In case of singleMarkerMode, also re-draw the markers.
|
|
if (this.options.singleMarkerMode) {
|
|
this._refreshSingleMarkerModeMarkers(layers);
|
|
}
|
|
|
|
return this;
|
|
},
|
|
|
|
/**
|
|
* Simply flags all parent clusters of the given markers as having a "dirty" icon.
|
|
* @param layers Array(L.Marker)|Map(L.Marker) list of markers.
|
|
* @private
|
|
*/
|
|
_flagParentsIconsNeedUpdate: function (layers) {
|
|
var id, parent;
|
|
|
|
// Assumes layers is an Array or an Object whose prototype is non-enumerable.
|
|
for (id in layers) {
|
|
// Flag parent clusters' icon as "dirty", all the way up.
|
|
// Dumb process that flags multiple times upper parents, but still
|
|
// much more efficient than trying to be smart and make short lists,
|
|
// at least in the case of a hierarchy following a power law:
|
|
// http://jsperf.com/flag-nodes-in-power-hierarchy/2
|
|
parent = layers[id].__parent;
|
|
while (parent) {
|
|
parent._iconNeedsUpdate = true;
|
|
parent = parent.__parent;
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Re-draws the icon of the supplied markers.
|
|
* To be used in singleMarkerMode only.
|
|
* @param layers Array(L.Marker)|Map(L.Marker) list of markers.
|
|
* @private
|
|
*/
|
|
_refreshSingleMarkerModeMarkers: function (layers) {
|
|
var id, layer;
|
|
|
|
for (id in layers) {
|
|
layer = layers[id];
|
|
|
|
// Make sure we do not override markers that do not belong to THIS group.
|
|
if (this.hasLayer(layer)) {
|
|
// Need to re-create the icon first, then re-draw the marker.
|
|
layer.setIcon(this._overrideMarkerIcon(layer));
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
L.Marker.include({
|
|
/**
|
|
* Updates the given options in the marker's icon and refreshes the marker.
|
|
* @param options map object of icon options.
|
|
* @param directlyRefreshClusters boolean (optional) true to trigger
|
|
* MCG.refreshClustersOf() right away with this single marker.
|
|
* @returns {L.Marker}
|
|
*/
|
|
refreshIconOptions: function (options, directlyRefreshClusters) {
|
|
var icon = this.options.icon;
|
|
|
|
L.setOptions(icon, options);
|
|
|
|
this.setIcon(icon);
|
|
|
|
// Shortcut to refresh the associated MCG clusters right away.
|
|
// To be used when refreshing a single marker.
|
|
// Otherwise, better use MCG.refreshClusters() once at the end with
|
|
// the list of modified markers.
|
|
if (directlyRefreshClusters && this.__parent) {
|
|
this.__parent._group.refreshClusters(this);
|
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}
|
|
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return this;
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}
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});
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|
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exports.MarkerClusterGroup = MarkerClusterGroup;
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exports.MarkerCluster = MarkerCluster;
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|
|
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})));
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//# sourceMappingURL=leaflet.markercluster-src.js.map
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