fixed flickering when a node was added to the stage, updated, and redraw due to throttling

dist/kinetic-core.js

@@ -1685,6 +1685,13 @@ Kinetic.Stage.prototype = {
         // draw layer and append canvas to container
         layer.draw();
         this.content.appendChild(layer.canvas);
+        
+        /*
+         * set layer last draw time to zero
+         * so that throttling doesn't take into account
+         * the layer draws associated with adding a node
+         */
+        layer.lastDrawTime = 0;
     },
     /**
      * get mouse position for desktop apps

src/Stage.js

@@ -309,6 +309,13 @@ Kinetic.Stage.prototype = {
         // draw layer and append canvas to container
         layer.draw();
         this.content.appendChild(layer.canvas);
+        
+        /*
+         * set layer last draw time to zero
+         * so that throttling doesn't take into account
+         * the layer draws associated with adding a node
+         */
+        layer.lastDrawTime = 0;
     },
     /**
      * get mouse position for desktop apps

tests/js/unitTests.js

@@ -40,8 +40,37 @@ Test.prototype.tests = {
         stage.add(layer);
         layer.add(group);
         layer.draw();
+    },
+    'STAGE - test layer throttle': function(containerId) {
+        var stage = new Kinetic.Stage({
+            container: containerId,
+            width: 578,
+            height: 200
+        });
+        var layer = new Kinetic.Layer();
+        var group = new Kinetic.Group();
+        var circle = new Kinetic.Circle({
+            x: stage.getWidth() / 2,
+            y: stage.getHeight() / 2,
+            radius: 70,
+            fill: 'green',
+            stroke: 'black',
+            strokeWidth: 4,
+            name: 'myCircle'
+        });
 
-        console.log(circle);
+        group.add(circle);
+        layer.add(group);
+        stage.add(layer);
+        
+        /*
+         * if throttling isn't working correctly, then the circle will
+         * flash green and then turn red
+         */
+        circle.setFill('red');
+        layer.draw();
+
+ 
     },
     'STAGE - add shape with linear gradient fill': function(containerId) {
         var stage = new Kinetic.Stage({