Correção no uso do plugin heatmap

Edmar Moretti
1 parent 92822439
Showing 1 changed file with 29 additions and 18 deletions Show diff stats
pacotes/heatmap/src/heatmap-openlayers.js
-/* 
+/*
  * heatmap.js OpenLayers Heatmap Class
  *
  * Copyright (c) 2011, Patrick Wied (http://www.patrick-wied.at)
  * Dual-licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
  * and the Beerware (http://en.wikipedia.org/wiki/Beerware) license.
- * 
+ *
  * Modified on Jun,06 2011 by Antonio Santiago (http://www.acuriousanimal.com)
  * - Heatmaps as independent map layer.
  * - Points based on OpenLayers.LonLat.
  * - Data initialization in constructor.
  * - Improved 'addDataPoint' to add new lonlat based points.
- */ 
+ */
 OpenLayers.Layer.Heatmap = OpenLayers.Class(OpenLayers.Layer, {
 	// the heatmap isn't a basic layer by default - you usually want to display the heatmap over another map ;)
 	isBaseLayer: false,
@@ -34,18 +34,18 @@ OpenLayers.Layer.Heatmap = OpenLayers.Class(OpenLayers.Layer, {
 		// create the heatmap with passed heatmap-options
 		this.heatmap = h337.create(hmoptions);
-		handler = function(){ 
+		handler = function(){
 			if(this.map && this.tmpData.max){
-				this.updateLayer(); 
+				this.updateLayer();
 			}
 		};
-		handler1 = function(){ 
+		handler1 = function(){
 			if(this.tmpData && this.tmpData.max){
 				this.toggle();
 				this.updateLayer();
 			}
 		};
-		
+
 		// on zoomend and moveend we have to move the canvas element and redraw the datapoints with new positions
 		//map.events.register("zoomend", this, handler);
 		map.events.register("moveend", this, handler);
@@ -53,16 +53,16 @@ OpenLayers.Layer.Heatmap = OpenLayers.Class(OpenLayers.Layer, {
 		map.events.register(
 				"removed",
 				this,
-				function(){ 
+				function(){
 					if(this.tmpData.max){
-						this.destroy(); 
+						this.destroy();
 					}
 				});
 	},
 	updateLayer: function(){
 		var pixelOffset = this.getPixelOffset(),
 		el = this.heatmap.get('element');
-		// if the pixeloffset e.g. for x was positive move the canvas element to the left by setting left:-offset.y px 
+		// if the pixeloffset e.g. for x was positive move the canvas element to the left by setting left:-offset.y px
 		// otherwise move it the right by setting it a positive value. same for top
 		el.style.top = ((pixelOffset.y > 0)?('-'+pixelOffset.y):(Math.abs(pixelOffset.y)))+'px';
 		el.style.left = ((pixelOffset.x > 0)?('-'+pixelOffset.x):(Math.abs(pixelOffset.x)))+'px';
@@ -80,9 +80,9 @@ OpenLayers.Layer.Heatmap = OpenLayers.Class(OpenLayers.Layer, {
 		c_lonlat = new OpenLayers.LonLat(c.lon, c.lat),
 		c_pixel = this.mapLayer.getViewPortPxFromLonLat(c_lonlat);
-		return { 
+		return {
 			x: o_pixel.x - c_pixel.x,
-			y: o_pixel.y - c_pixel.y 
+			y: o_pixel.y - c_pixel.y
 		};
 	},
@@ -90,20 +90,31 @@ OpenLayers.Layer.Heatmap = OpenLayers.Class(OpenLayers.Layer, {
 		var set = {},
 		dataset = obj.data,
 		dlen = dataset.length,
-		entry, lonlat, pixel;
+		entry, lonlat, pixel, proj, tproj, vp;
 		set.max = obj.max;
 		set.data = [];
+
 		// get the pixels for all the lonlat entries
+		proj = this.map.getProjectionObject();
+		tproj = this.projection;
 		while(dlen--){
-			entry = dataset[dlen],
-			lonlat = entry.lonlat.clone().transform(this.projection, this.map.getProjectionObject()),
-			pixel = this.roundPixels(this.getViewPortPxFromLonLat(lonlat));
+			entry = dataset[dlen];
+			try{
+				lonlat = entry.lonlat.clone().transform(tproj, proj);
+				if(lonlat){
+					vp = this.getViewPortPxFromLonLat(lonlat);
-			if(pixel){
-				set.data.push({x: pixel.x, y: pixel.y, count: entry.count});
+					pixel = this.roundPixels(vp);
+
+					if(pixel){
+						set.data.push({x: pixel.x, y: pixel.y, count: entry.count});
+					}
+				}
 			}
+			catch(e){}
 		}
+
 		this.tmpData = obj;
 		this.heatmap.store.setDataSet(set);
 	},