give popups a 'closeOnMove' option. if set to true, the popup will close itself as soon as the map is pan/zoom (move)ed. patch by jrf, euzuro review by elemoine, cr5. (Closes #1726)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@8397 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Popup.js

@@ -173,6 +173,13 @@ OpenLayers.Popup = OpenLayers.Class({
      *     Default is false.
      */
     panMapIfOutOfView: false,
+
+    /**
+     * APIProperty: closeOnMove
+     * {Boolean} When map pans, close the popup.
+     *     Default is false.
+     */
+    closeOnMove: false,
     
     /** 
      * Property: map 
@@ -253,6 +260,10 @@ OpenLayers.Popup = OpenLayers.Class({
         this.opacity = null;
         this.border = null;
         
+        if (this.closeOnMove && this.map) {
+            this.map.events.unregister("movestart", this, this.hide);
+        }
+
         this.events.destroy();
         this.events = null;
         
@@ -294,6 +305,12 @@ OpenLayers.Popup = OpenLayers.Class({
                 px = this.map.getLayerPxFromLonLat(this.lonlat);
             }
         }
+
+        // this assumes that this.map already exists, which is okay because 
+        // this.draw is only called once the popup has been added to the map.
+        if (this.closeOnMove) {
+            this.map.events.register("movestart", this, this.hide);
+        }
         
         //listen to movestart, moveend to disable overflow (FF bug)
         if (OpenLayers.Util.getBrowserName() == 'firefox') {