Changeset 9186 for src/django_gheat/website/static

Timestamp:

May 12, 2011, 12:56:07 PM (14 years ago)

Author:

dennisw

Message:

Nodelist progress. Shows nodes around mouse when you click on map. Next; fix boundaries per zoomlevel and nodelist display.

File:

• src/django_gheat/website/static/heatmap.js (modified) (3 diffs)

src/django_gheat/website/static/heatmap.js

@@ -21 +21 @@
         map.events.register('click', map, GetMousePos);
         function GetMousePos(pos) {
-                var pixel = new OpenLayers.Pixel(pos.xy.x,pos.xy.y);
-                var lonlat = map.getLonLatFromPixel(pixel);
-                var mousepos = OpenLayers.Layer.SphericalMercator.inverseMercator(lonlat.lon, lonlat.lat);
-                loadNodeList(mousepos);
+                var pixbuffer = 100;
+                var sw = map.getLonLatFromPixel(new OpenLayers.Pixel(pos.xy.x+pixbuffer,pos.xy.y-pixbuffer));
+                var ne = map.getLonLatFromPixel(new OpenLayers.Pixel(pos.xy.x-pixbuffer,pos.xy.y+pixbuffer));
+                var pointsw = OpenLayers.Layer.SphericalMercator.inverseMercator(sw.lon, sw.lat);
+                var pointne = OpenLayers.Layer.SphericalMercator.inverseMercator(ne.lon, ne.lat);
+                getNodeList(pointsw, pointne);
         }
 
@@ -46 +48 @@
 }
 
-function loadNodeList(mousepos){
+function getNodeList(sw, ne){
   var nodelist;
   if (window.XMLHttpRequest){
@@ -59 +61 @@
   nodelist.onreadystatechange=function(){
     if (nodelist.readyState==4 && nodelist.status==200){
-      txt=eval("("+nodelist.responseText+")")
+      txt=nodelist.responseText
       document.getElementById('nodelist').innerHTML=txt;
     }
   }
 
-  nodelist.open("GET","/website/nodelist/" + mousepos.lat + "," + mousepos.lon,true);
+  nodelist.open("GET","/website/nodelist/" + sw.lat + "," + sw.lon + "," + ne.lat + "," + ne.lon,true);
   nodelist.send();
 }