#655: add layer.eraseFeatures.patch() on the "public" side of the API - layer methods should be called instead of layer.renderer methods wherever possible

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3065 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer.js

@@ -109,13 +109,19 @@ OpenLayers.Renderer.prototype =
     /** 
      * Draw the feature.  The optional style argument can be used
      * to override the feature's own style.  This method should only
-     * be called from layer.drawFeature().  Implemented by a renderer
-     * subclass.
+     * be called from layer.drawFeature().
      *
      * @param {OpenLayers.Feature.Vector} feature 
      * @param {Object} style
+     * @private
      */
-    drawFeature: function(feature, style) {},
+    drawFeature: function(feature, style) {
+        if(style == null) {
+            style = feature.style;
+        }
+        this.drawGeometry(feature.geometry, style, feature.id);
+    },
+
 
     /** 
      * virtual function
@@ -125,15 +131,16 @@ OpenLayers.Renderer.prototype =
      *
      * @param geometry {OpenLayers.Geometry}
      * @param style {Object}
+     * @param {String} featureId
      * @private
      */
-    drawGeometry: function(geometry, style) {},
+    drawGeometry: function(geometry, style, featureId) {},
         
     /**
      * virtual function
      *
      * Clear all vectors from the renderer
-     *
+     * @private
      */    
     clear: function() {},
 
@@ -152,12 +159,27 @@ OpenLayers.Renderer.prototype =
      */
     getFeatureIdFromEvent: function(evt) {},
     
+    /**
+     * This is called by the layer to erase features
+     * @param {Array(OpenLayers.Feature.Vector)} features
+     * @private
+     */
+    eraseFeatures: function(features) {
+        if(!(features instanceof Array)) {
+            features = [features];
+        }
+        for(var i=0; i<features.length; ++i) {
+            this.eraseGeometry(features[i].geometry);
+        }
+    },
+    
     /**
      * virtual function
      * 
      * Remove a geometry from the renderer (by id)
      * 
      * @param geometry {OpenLayers.Geometry}
+     * @private
      */
     eraseGeometry: function(geometry) {},