Changeset 9782 for src/django_gheat/wlheatmap/static/heatmap.js

Timestamp:

Dec 14, 2011, 10:24:31 PM (13 years ago)

Author:

rick

Message:

Some tricks to start making permalinks for custom filters to be able to share more interesing views right from a single link. As building those filters can sometimes be a burden...

File:

• src/django_gheat/wlheatmap/static/heatmap.js (modified) (1 diff)

src/django_gheat/wlheatmap/static/heatmap.js

@@ -20 +20 @@
     controls: [
       new OpenLayers.Control.Navigation(),
-      new OpenLayers.Control.Permalink(),
+      new OpenLayers.Control.Permalink({
+        anchor : true,
+        createParams: function(center, zoom, layers) {
+          center = center || this.map.getCenter();
+    
+          var params = OpenLayers.Util.getParameters(this.base);
+    
+          // If there's still no center, map is not initialized yet. 
+          // Break out of this function, and simply return the params from the
+          // base link.
+          if (center) {
+    
+              //zoom
+              params.zoom = zoom || this.map.getZoom();
+    
+              //lon,lat
+              var lat = center.lat;
+              var lon = center.lon;
+    
+              if (this.displayProjection) {
+                  var mapPosition = OpenLayers.Projection.transform(
+                    { x: lon, y: lat },
+                    this.map.getProjectionObject(),
+                    this.displayProjection );
+                  lon = mapPosition.x;
+                  lat = mapPosition.y;
+              }
+              params.lat = Math.round(lat*100000)/100000;
+              params.lon = Math.round(lon*100000)/100000;
+    
+              //layers        
+              layers = layers || this.map.layers;
+              params.layers = '';
+              for (var i=0, len=layers.length; i<len; i++) {
+                  var layer = layers[i];
+    
+                  if (layer.isBaseLayer) {
+                      params.layers += (layer == this.map.baseLayer) ? "B" : "0";
+                  } else {
+                      params.layers += (layer.getVisibility()) ? "T" : "F";
+                  }
+              }
+          }
+          //XXX: Hack custom filters in here
+          params.customParam = "foo";
+          return params;
+        }
+      }),
       new OpenLayers.Control.PanZoomBar(),
       new OpenLayers.Control.ZoomBox(),