Strategy.Fixed should listen to refresh event, (Closes #1939), r=tschaub

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9164 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Vector.js

@@ -299,7 +299,7 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
      *     the refresh event.
      */
     refresh: function(obj) {
-        if(this.inRange && this.visibility) {
+        if(this.calculateInRange() && this.visibility) {
             this.events.triggerEvent("refresh", obj);
         }
     },

lib/OpenLayers/Strategy/Fixed.js

@@ -53,6 +53,10 @@ OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
      */
     activate: function() {
         if(OpenLayers.Strategy.prototype.activate.apply(this, arguments)) {
+            this.layer.events.on({
+                "refresh": this.load,
+                scope: this
+            });
             if(this.layer.visibility == true || this.preload) {
                 this.load();
             } else {
@@ -66,16 +70,38 @@ OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
         return false;
     },
     
+    /**
+     * Method: deactivate
+     * Deactivate the strategy.  Undo what is done in <activate>.
+     * 
+     * Returns:
+     * {Boolean} The strategy was successfully deactivated.
+     */
+    deactivate: function() {
+        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
+        if(deactivated) {
+            this.layer.events.un({
+                "refresh": this.load,
+                "visibilitychanged": this.load,
+                scope: this
+            });
+        }
+        return deactivated;
+    },
+
     /**
      * Method: load
      * Tells protocol to load data and unhooks the visibilitychanged event
+     *
+     * Parameters:
+     * options - {Object} options to pass to protocol read.
      */
-    load: function() {
+    load: function(options) {
         this.layer.events.triggerEvent("loadstart");
-        this.layer.protocol.read({
+        this.layer.protocol.read(OpenLayers.Util.applyDefaults({
             callback: this.merge,
             scope: this
-        });
+        }, options));
         this.layer.events.un({
             "visibilitychanged": this.load,
             scope: this
@@ -87,6 +113,7 @@ OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
      * Add all features to the layer.
      */
     merge: function(resp) {
+        this.layer.destroyFeatures();
         var features = resp.features;
         if (features && features.length > 0) {
             var remote = this.layer.projection;