-constructor fix

Patterns/Scripts/Decorator.js

@@ -1,4 +1,5 @@
-function Ball( param )
+
+function Ball( param )
 {
     this._radius = param.radius;
     this._color = param.color;
@@ -13,12 +14,15 @@ Ball.prototype =
     inc: function(){ this._radius += this.INCREMENTATION_STEP }
 }
 
+// Decorator_A
 function StripedBall( ball )
 {
     this._ball = ball    
 }
 StripedBall.prototype = 
 {
+    constructor: StripedBall,
+
     draw: function()
     {
         this._ball.draw();
@@ -36,6 +40,8 @@ function SpeckledBall( ball )
 }
 SpeckledBall.prototype = 
 {
+    constructor: SpeckledBall,
+
     draw: function()
     {
         this._ball.draw();
@@ -47,6 +53,7 @@ SpeckledBall.prototype =
     }
 }
 
+console.log("*heavy decorator*");
 var ball1 = new SpeckledBall( new StripedBall( new Ball({ radius:100, color:"red"})));
 var ball2 = new StripedBall( new SpeckledBall( new Ball({ radius:100, color:"green"})));
 
@@ -55,3 +62,40 @@ ball1.inc();
 ball1.draw();
 
 ball2.draw();
+
+//Decorator_B
+function MakeStripedBall( ball )
+{
+    var function_name = "draw";
+    var prev_func = ball[ function_name ];
+
+    ball[ function_name ] = function()
+    {
+        prev_func.apply( this, arguments )
+        console.log("and with stripes");
+    };
+
+    return ball;
+}
+function MakeSpeckledBall( ball )
+{
+    var function_name = "draw";
+    var prev_func = ball[function_name];
+
+    ball[function_name] = function ()
+    {
+        prev_func.apply(this, arguments)
+        console.log("and with dots!");
+    };
+
+    return ball;
+}
+console.log("*light decorator*");
+var ball3 = MakeStripedBall( MakeSpeckledBall( new Ball({ radius: 150, color: "blue" })));
+var ball4 = MakeSpeckledBall(MakeStripedBall(new Ball({ radius: 150, color: "blue" })));
+
+ball3.draw();
+ball3.inc();
+ball3.draw();
+
+ball4.draw();