// Clusterer.js - marker clustering routines for Google Maps apps
//
// Using these routines is very easy.
//
// 1) Load the routines into your code:
//
//        <script src="http://www.acme.com/javascript/Clusterer.js" type="text/javascript"></script>
//
// 2) Create a Clusterer object, passing it your map object:
//
//        var clusterer = new Clusterer( map );
//
// 3) Wherever you now do map.addOverlay( marker ), instead call
//    clusterer.AddMarker( marker, title ).  The title is just a
//    short descriptive string to use in the cluster info-boxes.
//
// 4) If you are doing any map.removeOverlay( marker ) calls, change those
//    to clusterer.RemoveMarker( marker ).
//
// That's it!  Everything else happens automatically.
//
//
// The current version of this code is always available at:
// http://www.acme.com/javascript/
//
//
// Copyright � 2005,2006 by Jef Poskanzer <jef@mail.acme.com>.
// All rights reserved.
//
// 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 ( map )
    {
    this.map = map;
    this.markers = [];
    this.clusters = [];
    this.visibleTS = [];
    this.timeout = null;
    this.currentZoomLevel = map.getZoom();

    this.maxVisibleMarkers = Clusterer.defaultMaxVisibleMarkers;
    this.gridSize = Clusterer.defaultGridSize;
    this.minMarkersPerCluster = Clusterer.defaultMinMarkersPerCluster;
    this.maxLinesPerInfoBox = Clusterer.defaultMaxLinesPerInfoBox;
    this.icon = Clusterer.defaultIcon;

    this.countBox = Clusterer.defaultCountBox;
    this.displayInfoBox = Clusterer.defaultDisplayInfoBox;
    this.topPageSelector = Clusterer.defaultTopPageSelector;
    this.bottomPageSelector = Clusterer.defaultBottomPageSelector;
   
    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 ) );
    };


Clusterer.defaultMaxVisibleMarkers = 200;
Clusterer.defaultGridSize = 5;
Clusterer.defaultMinMarkersPerCluster = 5;
Clusterer.defaultMaxLinesPerInfoBox = 11;

Clusterer.defaultIcon = new GIcon();
Clusterer.defaultIcon.image = 'images/blue_large.png';
Clusterer.defaultIcon.shadow = 'images/shadow_large.png';
Clusterer.defaultIcon.iconSize = new GSize( 30, 51 );
Clusterer.defaultIcon.shadowSize = new GSize( 56, 51 );
Clusterer.defaultIcon.iconAnchor = new GPoint( 16, 52 );
Clusterer.defaultIcon.infoWindowAnchor = new GPoint( 13, 3 );
Clusterer.defaultIcon.infoShadowAnchor = new GPoint( 27, 37 );

Clusterer.defaultCountBox = "mainNumTS";
Clusterer.defaultDisplayInfoBox = "tsMainInfoDisplay";
Clusterer.defaultTopPageSelector = "topPageSelector";
Clusterer.defaultBottomPageSelector = "bottomPageSelector";



// Call this to change the cluster icon.
Clusterer.prototype.SetIcon = function ( icon )
    {
    this.icon = icon;
    };

// Call this to change the map marker count box.
Clusterer.prototype.SetCountBox = function ( id )
    {
    this.countBox = id;
    };

// Call this to change the map marker count box.
Clusterer.prototype.SetDisplayInfoBox = function ( id )
    {
    this.displayInfoBox = id;
    };

// Call this to change the map marker count box.
Clusterer.prototype.SetTopPageSelector = function ( id )
    {
    this.topPageSelector = id;
    };

// Call this to change the map marker count box.
Clusterer.prototype.SetBottomPageSelector = function ( id )
    {
    this.bottomPageSelector = id;
    };



// Changes the maximum number of visible markers before clustering kicks in.
Clusterer.prototype.SetMaxVisibleMarkers = function ( n )
    {
    this.maxVisibleMarkers = n;
    };


// Sets the minumum number of markers for a cluster.
Clusterer.prototype.SetMinMarkersPerCluster = function ( n )
    {
    this.minMarkersPerCluster = n;
    };


// Sets the maximum number of lines in an info box.
Clusterer.prototype.SetMaxLinesPerInfoBox = function ( n )
    {
    this.maxLinesPerInfoBox = n;
    };


// Call this to add a marker.
Clusterer.prototype.AddMarker = function ( marker, title, link, fullDisplay, tsID )
    {
//var ce = document.getElementById("check_error");
//ce.innerHTML += " <br/>In Clusterer.AddMarker ";

    if ( marker.setMap != null )
	marker.setMap( this.map );

    marker.tsID = tsID;
    marker.title = title;
    marker.link = link;
    marker.bindInfoWindowHtml(fullDisplay);
    marker.onMap = false;
    this.markers.push( marker );
    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 ce = document.getElementById("check_error");
//ce.innerHTML += " <br/>In Clusterer.Display ";

    var i, j, marker, cluster;

    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; i < clusterer.clusters.length; ++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();
    var actualbounds = 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 dy = ne.lat() - sw.lat();

// Check if the International Date Line is crossed
    var lngLower;
    var lngUpper;
    var dx;
    var newLngLower;
    var newLngUpper;

	var fullLng = bounds.isFullLng();
	if (fullLng) {
    		lngLower = -180;
    		lngUpper = 180;
	} else {
    		lngLower = sw.lng();
    		lngUpper = ne.lng();
	}
	
	// -+
	if ((lngLower < 0) && (lngUpper >= 0)) {
		dx = lngUpper - lngLower;
		dx *= 0.1;
		newLngUpper = lngUpper + dx;
		newLngLower = lngLower - dx;
	}

	// +-
	if ((lngLower >= 0) && (lngUpper < 0)) {
		dx = 360 + lngUpper - lngLower;
		dx *= 0.1;
		newLngLower = lngLower - dx;
		newLngUpper = lngUpper + dx;
	}

	// ++ 
	if ((lngLower >= 0) && (lngUpper >= 0)) {
		// Check if longitude crosses the International Date Line
		if (lngUpper < lngLower) {
			dx = 360 - (lngLower - lngUpper);
			dx *= 0.1;
			newLngUpper = lngUpper + dx;
			newLngLower = lngLower - dx;
		} else {
 			dx = lngUpper - lngLower;
			dx *= 0.1;
			newLngUpper = lngUpper + dx;
			newLngLower = lngLower - dx;
		}
	}

	// --
	if ((lngLower < 0) && (lngUpper < 0)) {
		// Check if longitude crosses the International Date Line
		if (lngUpper < lngLower) {
			dx = 360 - (lngLower - lngUpper);
			dx *= 0.1;
			newLngUpper = lngUpper + dx;
			newLngLower = lngLower - dx;
		} else {
 			dx = lngUpper - lngLower;
			dx *= 0.1;
			newLngUpper = lngUpper + dx;
			newLngLower = lngLower - dx;
		}
	}

dx *= 10; 

//ce.innerHTML += " <br/>  OLD (sw.lat, sw.lng) = ("+sw.lat()+", "+sw.lng()+")";
//ce.innerHTML += "  OLD (ne.lat, ne.lng) = ("+ne.lat()+", "+ne.lng()+")";
//ce.innerHTML += "  (dlat, dlng) = ("+dy+", "+dx+")";
//ce.innerHTML += "  CALC (sw.lat, sw.lng) = ("+(sw.lat() - dy)+", "+newLngLower+")";
//ce.innerHTML += "  CALC (ne.lat, ne.lng) = ("+(ne.lat() + dy)+", "+newLngUpper+")";


    if ( dx < 300 && dy < 150 )
	{
	dy *= 0.10;
	bounds = new GLatLngBounds(
	  new GLatLng( sw.lat() - dy, newLngLower ),
	  new GLatLng( ne.lat() + dy, newLngUpper ) );
	}

//ce.innerHTML += " <br/>  NEW (sw.lat, sw.lng) = ("+bounds.getSouthWest().lat()+", "+bounds.getSouthWest().lng()+")";
//ce.innerHTML += "  NEW (ne.lat, ne.lng) = ("+bounds.getNorthEast().lat()+", "+bounds.getNorthEast().lng()+")";

    // Partition the markers into visible and non-visible lists.
    var countVisibleMarkers = 0;
    var visibleMarkers = [];
    var nonvisibleMarkers = [];
// Get TS Info for these visible markers (stored in global variable)
    clusterer.visibleTS = [];

    for ( i = 0; i < clusterer.markers.length; ++i )
	{
	marker = clusterer.markers[i];

//ce.innerHTML += "  Marker ["+i+"] (lat, lng) = ("+marker.getPoint().lat()+", "+marker.getPoint().lng()+")";

	if ( marker != null )
	    if ( bounds.contains( marker.getPoint() ) ) {
//ce.innerHTML += " IN BOUNDS";
		visibleMarkers.push( marker );
		// Since the tested bounds are actually slightly wider than the map 
		// to allow smooth scrolling, the count needs to be tested with the
		// actual bounds
	    	if ( actualbounds.contains( marker.getPoint() ) ) {
			clusterer.visibleTS[countVisibleMarkers] = marker.tsID;
			countVisibleMarkers = countVisibleMarkers + 1;
//ce.innerHTML += " VizMarker ("+i+") = "+marker.tsID;
		}
	    } else
//ce.innerHTML += " NOT BOUNDS";
		nonvisibleMarkers.push( marker );
	}

//	for ( i = 0; i < this.visibleTS.length; i++) {
//		visibleTS.push( visibleMarkers[i].tsID );
//ce.innerHTML += " visibleTS ("+i+") = "+this.visibleTS[i];
//	}

//ce.innerHTML += " countVisibleMarkers = "+countVisibleMarkers;

	clusterer.DisplayMarkerCount( clusterer.markers.length, countVisibleMarkers );


//	for ( i = 0; i < visibleMarkers.length; i++) {
//		visibleTS.push( visibleMarkers[i].tsID );
//ce.innerHTML += " VizMarker ("+i+") = "+visibleMarkers[i].tsID;
//	}

// Call function to get TS Info
	globalCurrentPage = 1;
	totalNumTS = clusterer.visibleTS.length;

//ce.innerHTML += " totalNumTS = "+totalNumTS;
//ce.innerHTML += " justLoaded = "+justLoaded;

	if (justLoaded == false)
		if (totalNumTS > 0){
			if (clusterer.topPageSelector != null)
				getNewTSPage(globalCurrentPage, clusterer.displayInfoBox);
		 } else 
			searchNoRecMessage(clusterer.displayInfoBox, clusterer.topPageSelector, clusterer.bottomPageSelector);

    // Take down the non-visible markers.
    for ( i = 0; i < nonvisibleMarkers.length; ++i )
	{
	marker = nonvisibleMarkers[i];
	if ( marker.onMap )
	    {
	    clusterer.map.removeOverlay( marker );
	    marker.onMap = false;
	    }
	}

    // Take down the non-visible clusters.
    for ( i = 0; i < clusterer.clusters.length; ++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 );

// Additional code to handle longitude, especially when it crosses the International Date Line
	var lowerLat = bounds.getSouthWest().lat();
	var upperLat = bounds.getNorthEast().lat();
	var lowerLng;
	var upperLng; 
	var lngArray = [];

	var fullLon = bounds.isFullLng();
	if (fullLon) {
		lowerLng = -180;
		upperLng = 180;
	} else {
		lowerLng = bounds.getSouthWest().lng();
		upperLng = bounds.getNorthEast().lng();
	}
	
	// -+
	if ((lowerLng < 0) && (upperLng >= 0)) {
		for (var lng = lowerLng; lng <= upperLng; lng += lngInc ) 
			lngArray.push( lng );
	}

	// +-
	if ((lowerLng >= 0) && (upperLng < 0)) {
		for (var lng = lowerLng; lng <= 180; lng += lngInc ) 
			lngArray.push( lng );
		for (var lng = -180; lng <= upperLng; lng += lngInc ) 
			lngArray.push( lng );
	}

	// ++ 
	if ((lowerLng >= 0) && (upperLng >= 0)) {
		// Check if longitude crosses the International Date Line
		if (upperLng < lowerLng) {
			for (var lng = lowerLng; lng <= 180; lng += lngInc ) 
				lngArray.push( lng );
			for (var lng = -180; lng <= upperLng; lng += lngInc ) 
				lngArray.push( lng );

		} else {
			for (var lng = lowerLng; lng <= upperLng; lng += lngInc ) 
				lngArray.push( lng );
		} 
	}

	// --
	if ((lowerLng < 0) && (upperLng < 0)) {
		// Check if longitude crosses the International Date Line
		if (upperLng < lowerLng) {
			for (var lng = lowerLng; lng <= 180; lng += lngInc ) 
				lngArray.push( lng );
			for (var lng = -180; lng <= upperLng; lng += lngInc ) 
				lngArray.push( lng );

		} else {
			for (var lng = lowerLng; lng <= upperLng; lng += lngInc ) 
				lngArray.push( lng );
		} 
	}	


//ce.innerHTML += " <br/>CLUSTERERING lowerLng = "+lowerLng+" upperLng = "+upperLng+" lngInc = "+lngInc ;

//	    for ( var i in lngArray) {
//ce.innerHTML += " lngArray ("+i+") = "+lngArray[i];
//		}

	for ( var lat = lowerLat; lat <= upperLat; lat += latInc )
	    for ( var i in lngArray)
//	    for ( var lng = bounds.getSouthWest().lng(); lng <= bounds.getNorthEast().lng(); lng += lngInc )
		{
		var lng = lngArray[i];
		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; i < visibleMarkers.length; ++i )
	    {
	    marker = visibleMarkers[i];
	    if ( marker != null && ! marker.inCluster )
		{
		for ( j = 0; j < clusterer.clusters.length; ++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; i < clusterer.clusters.length; ++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; i < clusterer.clusters.length; ++i )
	    {
	    cluster = clusterer.clusters[i];
	    if ( cluster != null )
		{
		for ( j = 0; j < cluster.markers.length; ++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; i < clusterer.clusters.length; ++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; j < cluster.markers.length; ++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; i < visibleMarkers.length; ++i )
	{
	marker = visibleMarkers[i];
	if ( marker != null && ! marker.onMap && ! marker.inCluster )
	    {
	    clusterer.map.addOverlay( marker );
	    if ( marker.addedToMap != null )
		marker.addedToMap();
	    marker.onMap = true;
	    }
	}

    // Display the visible clusters not already up.
    for ( i = 0; i < clusterer.clusters.length; ++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 );

//ce.innerHTML += "  Out Clusterer.Display ";

    };


Clusterer.PopUp = function ( cluster )
    {
    var clusterer = cluster.clusterer;
    var html = '<div class="mapCluster">';
    var n = 0;
    for ( var i = 0; i < cluster.markers.length; ++i )
	{
	var marker = cluster.markers[i];
	if ( marker != null )
	    {
	    ++n;
	
	    html += '<div style="margin: 0.3em">';
	    if ( marker.getIcon().smallImage != null )
		html += '<img src="' + marker.getIcon().smallImage + '" width="' + ( marker.getIcon().smallImage.width ) + '" height="' + ( marker.getIcon().smallImage.height ) + '>';
	    else
		html += '<img src="' + marker.getIcon().image + '" width="' + ( marker.getIcon().iconSize.width ) + '" height="' + ( marker.getIcon().iconSize.height ) + '">';

	    html += '<span style="margin-left: 0.5em">' + marker.link + '</span></div>';

	    }
	}
    html += '</div>';
    clusterer.map.closeInfoWindow();

    cluster.marker.openInfoWindow( html );

GEvent.addListener(map.getInfoWindow(),"infowindowopen",  function() {
		map.savePosition();
	    });
GEvent.addListener(map.getInfoWindow(),"infowindowclose",  function() {
		map.returnToSavedPosition();
	    });


    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.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 );
    };


// Added by Geogad

// Remove all markers and clusters.
Clusterer.prototype.RemoveAll = function ( )
    {
    for ( var i = 0; i < this.markers.length; ++i )
	this.RemoveMarker( this.markers[i]);

    for ( var i = 0; i < this.clusters.length; ++i )
	this.ClearCluster( this.clusters[i]);

    this.DisplayMarkerCount(0, 0);

    };

// Display total and visible marker count
Clusterer.prototype.DisplayMarkerCount = function ( total, visible ) 
	{
	var displayNumTS = document.getElementById( this.countBox );
	displayNumTS.innerHTML = " <span class='numTitle'>Total Found:</span> " + total + 
		" custom tours <br/><span class='numTitle'>Total Displayed:</span> "+visible+" custom tours";
	};