--- /dev/null
+// Clusterer.js - marker clustering routines for Google Maps apps
+//
+// The original version of this code is available at:
+// http://www.acme.com/javascript/
+//
+// Copyright © 2005,2006 by Jef Poskanzer <jef@mail.acme.com>.
+// All rights reserved.
+//
+// Modified for inclusion into the YM4R library in accordance with the
+// following license:
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+// For commentary on this license please see http://www.acme.com/license.html
+
+
+// Constructor.
+Clusterer = function(markers,icon,maxVisibleMarkers,gridSize,minMarkersPerCluster,maxLinesPerInfoBox) {
+ this.markers = [];
+ if(markers){
+ for(var i =0 ; i< markers.length ; i++){
+ this.addMarker(markers[i]);
+ }
+ }
+ this.clusters = [];
+ this.timeout = null;
+
+ this.maxVisibleMarkers = maxVisibleMarkers || 150;
+ this.gridSize = gridSize || 5;
+ this.minMarkersPerCluster = minMarkersPerCluster || 5;
+ this.maxLinesPerInfoBox = maxLinesPerInfoBox || 10;
+
+ this.icon = icon || G_DEFAULT_ICON;
+}
+
+Clusterer.prototype = new GOverlay();
+
+Clusterer.prototype.initialize = function ( map ){
+ this.map = map;
+ this.currentZoomLevel = map.getZoom();
+
+ GEvent.addListener( map, 'zoomend', Clusterer.makeCaller( Clusterer.display, this ) );
+ GEvent.addListener( map, 'moveend', Clusterer.makeCaller( Clusterer.display, this ) );
+ GEvent.addListener( map, 'infowindowclose', Clusterer.makeCaller( Clusterer.popDown, this ) );
+ //Set map for each marker
+ for(var i = 0,len = this.markers.length ; i < len ; i++){
+ this.markers[i].setMap( map );
+ }
+ this.displayLater();
+}
+
+Clusterer.prototype.remove = function(){
+ for ( var i = 0; i < this.markers.length; ++i ){
+ this.removeMarker(this.markers[i]);
+ }
+}
+
+Clusterer.prototype.copy = function(){
+ return new Clusterer(this.markers,this.icon,this.maxVisibleMarkers,this.gridSize,this.minMarkersPerCluster,this.maxLinesPerInfoBox);
+}
+
+Clusterer.prototype.redraw = function(force){
+ this.displayLater();
+}
+
+// Call this to change the cluster icon.
+Clusterer.prototype.setIcon = function ( icon ){
+ this.icon = icon;
+}
+
+// Call this to add a marker.
+Clusterer.prototype.addMarker = function ( marker, description){
+ marker.onMap = false;
+ this.markers.push( marker );
+ marker.description = marker.description || description;
+ if(this.map != null){
+ marker.setMap(this.map);
+ this.displayLater();
+ }
+};
+
+
+// Call this to remove a marker.
+Clusterer.prototype.removeMarker = function ( marker ){
+ for ( var i = 0; i < this.markers.length; ++i )
+ if ( this.markers[i] == marker ){
+ if ( marker.onMap )
+ this.map.removeOverlay( marker );
+ for ( var j = 0; j < this.clusters.length; ++j ){
+ var cluster = this.clusters[j];
+ if ( cluster != null ){
+ for ( var k = 0; k < cluster.markers.length; ++k )
+ if ( cluster.markers[k] == marker ){
+ cluster.markers[k] = null;
+ --cluster.markerCount;
+ break;
+ }
+ if ( cluster.markerCount == 0 ){
+ this.clearCluster( cluster );
+ this.clusters[j] = null;
+ }
+ else if ( cluster == this.poppedUpCluster )
+ Clusterer.rePop( this );
+ }
+ }
+ this.markers[i] = null;
+ break;
+ }
+ this.displayLater();
+};
+
+Clusterer.prototype.displayLater = function (){
+ if ( this.timeout != null )
+ clearTimeout( this.timeout );
+ this.timeout = setTimeout( Clusterer.makeCaller( Clusterer.display, this ), 50 );
+};
+
+Clusterer.display = function ( clusterer ){
+ var i, j, marker, cluster, len, len2;
+
+ clearTimeout( clusterer.timeout );
+
+ var newZoomLevel = clusterer.map.getZoom();
+ if ( newZoomLevel != clusterer.currentZoomLevel ){
+ // When the zoom level changes, we have to remove all the clusters.
+ for ( i = 0 , len = clusterer.clusters.length; i < len; ++i ){
+ if ( clusterer.clusters[i] != null ){
+ clusterer.clearCluster( clusterer.clusters[i] );
+ clusterer.clusters[i] = null;
+ }
+ }
+ clusterer.clusters.length = 0;
+ clusterer.currentZoomLevel = newZoomLevel;
+ }
+
+ // Get the current bounds of the visible area.
+ var bounds = clusterer.map.getBounds();
+
+ // Expand the bounds a little, so things look smoother when scrolling
+ // by small amounts.
+ var sw = bounds.getSouthWest();
+ var ne = bounds.getNorthEast();
+ var dx = ne.lng() - sw.lng();
+ var dy = ne.lat() - sw.lat();
+ dx *= 0.10;
+ dy *= 0.10;
+ bounds = new GLatLngBounds(
+ new GLatLng( sw.lat() - dy, sw.lng() - dx ),
+ new GLatLng( ne.lat() + dy, ne.lng() + dx )
+ );
+
+ // Partition the markers into visible and non-visible lists.
+ var visibleMarkers = [];
+ var nonvisibleMarkers = [];
+ for ( i = 0, len = clusterer.markers.length ; i < len; ++i ){
+ marker = clusterer.markers[i];
+ if ( marker != null )
+ if ( bounds.contains( marker.getPoint() ) )
+ visibleMarkers.push( marker );
+ else
+ nonvisibleMarkers.push( marker );
+ }
+
+ // Take down the non-visible markers.
+ for ( i = 0, len = nonvisibleMarkers.length ; i < len; ++i ){
+ marker = nonvisibleMarkers[i];
+ if ( marker.onMap ){
+ clusterer.map.removeOverlay( marker );
+ marker.onMap = false;
+ }
+ }
+
+ // Take down the non-visible clusters.
+ for ( i = 0, len = clusterer.clusters.length ; i < len ; ++i ){
+ cluster = clusterer.clusters[i];
+ if ( cluster != null && ! bounds.contains( cluster.marker.getPoint() ) && cluster.onMap ){
+ clusterer.map.removeOverlay( cluster.marker );
+ cluster.onMap = false;
+ }
+ }
+
+ // Clustering! This is some complicated stuff. We have three goals
+ // here. One, limit the number of markers & clusters displayed, so the
+ // maps code doesn't slow to a crawl. Two, when possible keep existing
+ // clusters instead of replacing them with new ones, so that the app pans
+ // better. And three, of course, be CPU and memory efficient.
+ if ( visibleMarkers.length > clusterer.maxVisibleMarkers ){
+ // Add to the list of clusters by splitting up the current bounds
+ // into a grid.
+ var latRange = bounds.getNorthEast().lat() - bounds.getSouthWest().lat();
+ var latInc = latRange / clusterer.gridSize;
+ var lngInc = latInc / Math.cos( ( bounds.getNorthEast().lat() + bounds.getSouthWest().lat() ) / 2.0 * Math.PI / 180.0 );
+ for ( var lat = bounds.getSouthWest().lat(); lat <= bounds.getNorthEast().lat(); lat += latInc )
+ for ( var lng = bounds.getSouthWest().lng(); lng <= bounds.getNorthEast().lng(); lng += lngInc ){
+ cluster = new Object();
+ cluster.clusterer = clusterer;
+ cluster.bounds = new GLatLngBounds( new GLatLng( lat, lng ), new GLatLng( lat + latInc, lng + lngInc ) );
+ cluster.markers = [];
+ cluster.markerCount = 0;
+ cluster.onMap = false;
+ cluster.marker = null;
+ clusterer.clusters.push( cluster );
+ }
+
+ // Put all the unclustered visible markers into a cluster - the first
+ // one it fits in, which favors pre-existing clusters.
+ for ( i = 0, len = visibleMarkers.length ; i < len; ++i ){
+ marker = visibleMarkers[i];
+ if ( marker != null && ! marker.inCluster ){
+ for ( j = 0, len2 = clusterer.clusters.length ; j < len2 ; ++j ){
+ cluster = clusterer.clusters[j];
+ if ( cluster != null && cluster.bounds.contains( marker.getPoint() ) ){
+ cluster.markers.push( marker );
+ ++cluster.markerCount;
+ marker.inCluster = true;
+ }
+ }
+ }
+ }
+
+ // Get rid of any clusters containing only a few markers.
+ for ( i = 0, len = clusterer.clusters.length ; i < len ; ++i )
+ if ( clusterer.clusters[i] != null && clusterer.clusters[i].markerCount < clusterer.minMarkersPerCluster ){
+ clusterer.clearCluster( clusterer.clusters[i] );
+ clusterer.clusters[i] = null;
+ }
+
+ // Shrink the clusters list.
+ for ( i = clusterer.clusters.length - 1; i >= 0; --i )
+ if ( clusterer.clusters[i] != null )
+ break;
+ else
+ --clusterer.clusters.length;
+
+ // Ok, we have our clusters. Go through the markers in each
+ // cluster and remove them from the map if they are currently up.
+ for ( i = 0, len = clusterer.clusters.length ; i < len; ++i ){
+ cluster = clusterer.clusters[i];
+ if ( cluster != null ){
+ for ( j = 0 , len2 = cluster.markers.length ; j < len2; ++j ){
+ marker = cluster.markers[j];
+ if ( marker != null && marker.onMap ){
+ clusterer.map.removeOverlay( marker );
+ marker.onMap = false;
+ }
+ }
+ }
+ }
+
+ // Now make cluster-markers for any clusters that need one.
+ for ( i = 0, len = clusterer.clusters.length; i < len; ++i ){
+ cluster = clusterer.clusters[i];
+ if ( cluster != null && cluster.marker == null ){
+ // Figure out the average coordinates of the markers in this
+ // cluster.
+ var xTotal = 0.0, yTotal = 0.0;
+ for ( j = 0, len2 = cluster.markers.length; j < len2 ; ++j ){
+ marker = cluster.markers[j];
+ if ( marker != null ){
+ xTotal += ( + marker.getPoint().lng() );
+ yTotal += ( + marker.getPoint().lat() );
+ }
+ }
+ var location = new GLatLng( yTotal / cluster.markerCount, xTotal / cluster.markerCount );
+ marker = new GMarker( location, { icon: clusterer.icon } );
+ cluster.marker = marker;
+ GEvent.addListener( marker, 'click', Clusterer.makeCaller( Clusterer.popUp, cluster ) );
+ }
+ }
+ }
+
+ // Display the visible markers not already up and not in clusters.
+ for ( i = 0, len = visibleMarkers.length; i < len; ++i ){
+ marker = visibleMarkers[i];
+ if ( marker != null && ! marker.onMap && ! marker.inCluster )
+ {
+ clusterer.map.addOverlay( marker );
+ marker.addedToMap();
+ marker.onMap = true;
+ }
+ }
+
+ // Display the visible clusters not already up.
+ for ( i = 0, len = clusterer.clusters.length ; i < len; ++i ){
+ cluster = clusterer.clusters[i];
+ if ( cluster != null && ! cluster.onMap && bounds.contains( cluster.marker.getPoint() )){
+ clusterer.map.addOverlay( cluster.marker );
+ cluster.onMap = true;
+ }
+ }
+
+ // In case a cluster is currently popped-up, re-pop to get any new
+ // markers into the infobox.
+ Clusterer.rePop( clusterer );
+};
+
+
+Clusterer.popUp = function ( cluster ){
+ var clusterer = cluster.clusterer;
+ var html = '<table width="300">';
+ var n = 0;
+ for ( var i = 0 , len = cluster.markers.length; i < len; ++i )
+ {
+ var marker = cluster.markers[i];
+ if ( marker != null )
+ {
+ ++n;
+ html += '<tr><td>';
+ if ( marker.getIcon().smallImage != null )
+ html += '<img src="' + marker.getIcon().smallImage + '">';
+ else
+ html += '<img src="' + marker.getIcon().image + '" width="' + ( marker.getIcon().iconSize.width / 2 ) + '" height="' + ( marker.getIcon().iconSize.height / 2 ) + '">';
+ html += '</td><td>' + marker.description + '</td></tr>';
+ if ( n == clusterer.maxLinesPerInfoBox - 1 && cluster.markerCount > clusterer.maxLinesPerInfoBox )
+ {
+ html += '<tr><td colspan="2">...and ' + ( cluster.markerCount - n ) + ' more</td></tr>';
+ break;
+ }
+ }
+ }
+ html += '</table>';
+ clusterer.map.closeInfoWindow();
+ cluster.marker.openInfoWindowHtml( html );
+ clusterer.poppedUpCluster = cluster;
+};
+
+Clusterer.rePop = function ( clusterer ){
+ if ( clusterer.poppedUpCluster != null )
+ Clusterer.popUp( clusterer.poppedUpCluster );
+};
+
+Clusterer.popDown = function ( clusterer ){
+ clusterer.poppedUpCluster = null;
+};
+
+Clusterer.prototype.clearCluster = function ( cluster ){
+ var i, marker;
+
+ for ( i = 0; i < cluster.markers.length; ++i ){
+ if ( cluster.markers[i] != null ){
+ cluster.markers[i].inCluster = false;
+ cluster.markers[i] = null;
+ }
+ }
+
+ cluster.markers.length = 0;
+ cluster.markerCount = 0;
+
+ if ( cluster == this.poppedUpCluster )
+ this.map.closeInfoWindow();
+
+ if ( cluster.onMap )
+ {
+ this.map.removeOverlay( cluster.marker );
+ cluster.onMap = false;
+ }
+};
+
+// This returns a function closure that calls the given routine with the
+// specified arg.
+Clusterer.makeCaller = function ( func, arg ){
+ return function () { func( arg ); };
+};
+
+
+// Augment GMarker so it handles markers that have been created but
+// not yet addOverlayed.
+GMarker.prototype.setMap = function ( map ){
+ this.map = map;
+};
+
+GMarker.prototype.getMap = function (){
+ return this.map;
+}
+
+GMarker.prototype.addedToMap = function (){
+ this.map = null;
+};
+
+
+GMarker.prototype.origOpenInfoWindow = GMarker.prototype.openInfoWindow;
+GMarker.prototype.openInfoWindow = function ( node, opts ){
+ if ( this.map != null )
+ return this.map.openInfoWindow( this.getPoint(), node, opts );
+ else
+ return this.origOpenInfoWindow( node, opts );
+};
+
+GMarker.prototype.origOpenInfoWindowHtml = GMarker.prototype.openInfoWindowHtml;
+GMarker.prototype.openInfoWindowHtml = function ( html, opts ){
+ if ( this.map != null )
+ return this.map.openInfoWindowHtml( this.getPoint(), html, opts );
+ else
+ return this.origOpenInfoWindowHtml( html, opts );
+};
+
+GMarker.prototype.origOpenInfoWindowTabs = GMarker.prototype.openInfoWindowTabs;
+GMarker.prototype.openInfoWindowTabs = function ( tabNodes, opts ){
+ if ( this.map != null )
+ return this.map.openInfoWindowTabs( this.getPoint(), tabNodes, opts );
+ else
+ return this.origOpenInfoWindowTabs( tabNodes, opts );
+};
+
+GMarker.prototype.origOpenInfoWindowTabsHtml = GMarker.prototype.openInfoWindowTabsHtml;
+GMarker.prototype.openInfoWindowTabsHtml = function ( tabHtmls, opts ){
+ if ( this.map != null )
+ return this.map.openInfoWindowTabsHtml( this.getPoint(), tabHtmls, opts );
+ else
+ return this.origOpenInfoWindowTabsHtml( tabHtmls, opts );
+};
+
+GMarker.prototype.origShowMapBlowup = GMarker.prototype.showMapBlowup;
+GMarker.prototype.showMapBlowup = function ( opts ){
+ if ( this.map != null )
+ return this.map.showMapBlowup( this.getPoint(), opts );
+ else
+ return this.origShowMapBlowup( opts );
+};
+
+
+function addDescriptionToMarker(marker, description){
+ marker.description = description;
+ return marker;
+}
projects / selectricity-live / blobdiff