added new destroyChildren() method

src/Container.js

@@ -39,6 +39,25 @@
 
             return this;
         },
+        /**
+         * destroy all children
+         * @method
+         * @memberof Kinetic.Container.prototype
+         */
+        destroyChildren: function() {
+            var children = this.children,
+                child;
+
+            while(children.length > 0) {
+                var child = children[0];
+                if (child.hasChildren()) {
+                    child.destroyChildren();
+                }
+                child.destroy();
+            }
+
+            return this;
+        },
         /**
          * add node to container
          * @method

src/Node.js

@@ -179,22 +179,18 @@
          * node.destroy();
          */
         destroy: function() {
-            var parent = this.getParent(), 
-                stage = this.getStage(), 
-                dd = Kinetic.DD, 
+            var children = this.children,
                 go = Kinetic.Global;
 
             // destroy children
-            while(this.children && this.children.length > 0) {
-                this.children[0].destroy();
+            while(this.hasChildren() && children.length > 0) {
+                children[0].destroy();
             }
 
             // remove from ids and names hashes
             go._removeId(this.getId());
             go._removeName(this.getName(), this._id);
 
-            // TODO: stop transitions
- 
             this.remove();
             return this;
         },

tests/js/unit/containerTests.js

@@ -350,6 +350,55 @@ Test.Modules.CONTAINER = {
         test(layer.children.length === 0, 'layer should have 0 children');
         test(group.children.length === 0, 'group should have 0 children');
     },
+    'destroy all children from layer': function(containerId) {
+        var stage = new Kinetic.Stage({
+            container: containerId,
+            width: 578,
+            height: 200
+        });
+        var layer = new Kinetic.Layer({
+            name: 'layerName',
+            id: 'layerId'
+        });
+        var group = new Kinetic.Group();
+        var circle1 = new Kinetic.Circle({
+            x: 100,
+            y: stage.getHeight() / 2,
+            radius: 70,
+            fill: 'green',
+            stroke: 'black',
+            strokeWidth: 4,
+            name: 'circleName',
+            id: 'circleId'
+        });
+
+        var circle2 = new Kinetic.Circle({
+            x: 300,
+            y: stage.getHeight() / 2,
+            radius: 70,
+            fill: 'green',
+            stroke: 'black',
+            strokeWidth: 4
+        });
+
+        group.add(circle1);
+        group.add(circle2);
+        layer.add(group);
+        stage.add(layer);
+
+        test(layer.children.length === 1, 'layer should have 1 children');
+        test(group.children.length === 2, 'group should have 2 children');
+        test(Kinetic.Global.names.circleName.length > 0, 'circleName should be in names hash');
+        test(Kinetic.Global.ids.circleId.getId() === 'circleId', 'layerId should be in ids hash');
+
+        layer.destroyChildren();
+        layer.draw();
+
+        test(layer.children.length === 0, 'layer should have 0 children');
+        test(group.children.length === 0, 'group should have 0 children');
+        test(Kinetic.Global.names.circleName === undefined, 'circleName should not be in names hash');
+        test(Kinetic.Global.ids.circleId === undefined, 'layerId should not be in ids hash');
+    },
     'add group': function(containerId) {
         var stage = new Kinetic.Stage({
             container: containerId,