'use strict'
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function init (L) {
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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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var 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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var npg = this._nonPointGroup
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var chunked = this.options.chunkedLoading
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var chunkInterval = this.options.chunkInterval
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var chunkProgress = this.options.chunkProgress
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var l = layersArray.length
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var offset = 0
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var originalArray = true
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var 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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var 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; var m
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var l = layersArray.length
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var fg = this._featureGroup
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var npg = this._nonPointGroup
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var 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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var 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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var needsRemoving = this._needsRemoving
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var thisNeedsRemoving; var i; var 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; var 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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}
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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())) {
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// Layer is visible ond on screen, immediate return
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callback()
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} else if (layer.__parent._zoom < Math.round(this._map._zoom)) {
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// Layer should be visible at this zoom level. It must not be on screen so just pan over to it
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this._map.on('moveend', showMarker, this)
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this._map.panTo(layer.getLatLng())
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} else {
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this._map.on('moveend', showMarker, this)
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this.on('animationend', showMarker, this)
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layer.__parent.zoomToBounds()
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}
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},
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// Overrides FeatureGroup.onAdd
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onAdd: function (map) {
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this._map = map
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var i, l, layer
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if (!isFinite(this._map.getMaxZoom())) {
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// eslint-disable-next-line no-throw-literal
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throw 'Map has no maxZoom specified'
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}
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this._featureGroup.addTo(map)
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this._nonPointGroup.addTo(map)
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if (!this._gridClusters) {
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this._generateInitialClusters()
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}
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this._maxLat = map.options.crs.projection.MAX_LATITUDE
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// Restore all the positions as they are in the MCG before removing them
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for (i = 0, l = this._needsRemoving.length; i < l; i++) {
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layer = this._needsRemoving[i]
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layer.newlatlng = layer.layer._latlng
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layer.layer._latlng = layer.latlng
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}
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// Remove them, then restore their new positions
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for (i = 0, l = this._needsRemoving.length; i < l; i++) {
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layer = this._needsRemoving[i]
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this._removeLayer(layer.layer, true)
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layer.layer._latlng = layer.newlatlng
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}
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this._needsRemoving = []
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// Remember the current zoom level and bounds
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this._zoom = Math.round(this._map._zoom)
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this._currentShownBounds = this._getExpandedVisibleBounds()
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this._map.on('zoomend', this._zoomEnd, this)
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this._map.on('moveend', this._moveEnd, this)
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if (this._spiderfierOnAdd) { // TODO FIXME: Not sure how to have spiderfier add something on here nicely
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this._spiderfierOnAdd()
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}
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this._bindEvents()
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// Actually add our markers to the map:
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l = this._needsClustering
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this._needsClustering = []
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this.addLayers(l, true)
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},
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// Overrides FeatureGroup.onRemove
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onRemove: function (map) {
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map.off('zoomend', this._zoomEnd, this)
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map.off('moveend', this._moveEnd, this)
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this._unbindEvents()
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// In case we are in a cluster animation
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this._map._mapPane.className = this._map._mapPane.className.replace(' leaflet-cluster-anim', '')
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if (this._spiderfierOnRemove) { // TODO FIXME: Not sure how to have spiderfier add something on here nicely
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this._spiderfierOnRemove()
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}
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delete this._maxLat
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// Clean up all the layers we added to the map
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this._hideCoverage()
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this._featureGroup.remove()
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this._nonPointGroup.remove()
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this._featureGroup.clearLayers()
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this._map = null
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},
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getVisibleParent: function (marker) {
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var vMarker = marker
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while (vMarker && !vMarker._icon) {
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vMarker = vMarker.__parent
|
}
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return vMarker || null
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},
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// Remove the given object from the given array
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_arraySplice: function (anArray, obj) {
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for (var i = anArray.length - 1; i >= 0; i--) {
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if (anArray[i] === obj) {
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anArray.splice(i, 1)
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return true
|
}
|
}
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},
|
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/**
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* 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)
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* @private
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*/
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_removeFromGridUnclustered: function (marker, z) {
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var map = this._map
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var gridUnclustered = this._gridUnclustered
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var minZoom = Math.floor(this._map.getMinZoom())
|
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for (; z >= minZoom; z--) {
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if (!gridUnclustered[z].removeObject(marker, map.project(marker.getLatLng(), z))) {
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break
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}
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}
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},
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_childMarkerDragStart: function (e) {
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e.target.__dragStart = e.target._latlng
|
},
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_childMarkerMoved: function (e) {
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if (!this._ignoreMove && !e.target.__dragStart) {
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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)
|
},
|
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_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
|
var gridUnclustered = this._gridUnclustered
|
var fg = this._featureGroup
|
var map = this._map
|
var 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
|
var markers = cluster._markers
|
var 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
|
var spiderfyOnMaxZoom = this.options.spiderfyOnMaxZoom
|
var showCoverageOnHover = this.options.showCoverageOnHover
|
var 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
|
var 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
|
var showCoverageOnHover = this.options.showCoverageOnHover
|
var zoomToBoundsOnClick = this.options.zoomToBoundsOnClick
|
var 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
|
},
|
|
_generateInitialClusters: function () {
|
var maxZoom = Math.ceil(this._map.getMaxZoom())
|
var minZoom = Math.floor(this._map.getMinZoom())
|
var radius = this.options.maxClusterRadius
|
var 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
|
var gridUnclustered = this._gridUnclustered
|
var minZoom = Math.floor(this._map.getMinZoom())
|
var markerPoint; var 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
|
},
|
|
/**
|
* 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()
|
var i = 0
|
var 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()
|
var fg = this._featureGroup
|
var minZoom = Math.floor(this._map.getMinZoom())
|
var 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
|
var markers = c._markers
|
var 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
|
var 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()
|
var 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()
|
var map = this._group._map
|
var boundsZoom = map.getBoundsZoom(this._bounds)
|
var zoom = this._zoom + 1
|
var mapZoom = map.getZoom()
|
var 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
|
var childClusters = this._childClusters
|
var latSum = 0
|
var lngSum = 0
|
var totalCount = this._childCount
|
var i; var child; var childLatLng; var 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
|
var i; var 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
|
var j; var 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
|
var zoom = this._zoom
|
var i; var 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)
|
var y = this._getCoord(point.y)
|
var grid = this._grid
|
var row = grid[y] = grid[y] || {}
|
var cell = row[x] = row[x] || []
|
var 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)
|
var y = this._getCoord(point.y)
|
var grid = this._grid
|
var row = grid[y] = grid[y] || {}
|
var cell = row[x] = row[x] || []
|
var i; var 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; var j; var k; var len; var row; var cell; var removed
|
var 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)
|
var y = this._getCoord(point.y)
|
var i; var j; var k; var row; var cell; var len; var obj; var dist
|
var objectPoint = this._objectPoint
|
var closestDistSq = this._sqCellSize
|
var 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
|
var 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
|
var 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
|
var maxPt = null
|
var newPoints = []
|
var i; var pt; var 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 = []
|
var 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; var minLat = false
|
var maxLng = false; var minLng = false
|
var maxLatPt = null; var minLatPt = null
|
var maxLngPt = null; var minLngPt = null
|
var maxPt = null; var minPt = null
|
var 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()
|
var points = []
|
var p; var 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)
|
var group = this._group
|
var map = group._map
|
var center = map.latLngToLayerPoint(this._latlng)
|
var 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)
|
var legLength = circumference / this._2PI // radius from circumference
|
var angleStep = this._2PI / count
|
var res = []
|
var i; var 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
|
var legLength = spiderfyDistanceMultiplier * this._spiralLengthStart
|
var separation = spiderfyDistanceMultiplier * this._spiralFootSeparation
|
var lengthFactor = spiderfyDistanceMultiplier * this._spiralLengthFactor * this._2PI
|
var angle = 0
|
var res = []
|
var 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
|
var map = group._map
|
var fg = group._featureGroup
|
var childMarkers = this.getAllChildMarkers(null, true)
|
var m; var 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
|
var map = group._map
|
var fg = group._featureGroup
|
var legOptions = this._group.options.spiderLegPolylineOptions
|
var i; var m; var leg; var 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
|
var group = this._group
|
var map = group._map
|
var fg = group._featureGroup
|
var thisLayerLatLng = this._latlng
|
var thisLayerPos = map.latLngToLayerPoint(thisLayerLatLng)
|
var svg = L.Path.SVG
|
var legOptions = L.extend({}, this._group.options.spiderLegPolylineOptions) // Copy the options so that we can modify them for animation.
|
var finalLegOpacity = legOptions.opacity
|
var i; var m; var leg; var legPath; var legLength; var 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
|
var group = this._group
|
var map = group._map
|
var fg = group._featureGroup
|
var thisLayerPos = zoomDetails ? map._latLngToNewLayerPoint(this._latlng, zoomDetails.zoom, zoomDetails.center) : map.latLngToLayerPoint(this._latlng)
|
var childMarkers = this.getAllChildMarkers(null, true)
|
var svg = L.Path.SVG
|
var m; var i; var leg; var legPath; var legLength; var 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)
|
}
|
|
return this
|
}
|
})
|
|
exports.MarkerClusterGroup = MarkerClusterGroup
|
exports.MarkerCluster = MarkerCluster
|
}
|
|
export default {
|
init
|
}
|
