Index: lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarModel.as
===================================================================
diff -u -rc8104fbbdd0a27d9915defa7ad30e1f5400062b9 -r4afbe006a3fe2f46f06b3bfcce0871e981121f64
--- lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarModel.as	(.../ToolbarModel.as)	(revision c8104fbbdd0a27d9915defa7ad30e1f5400062b9)
+++ lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarModel.as	(.../ToolbarModel.as)	(revision 4afbe006a3fe2f46f06b3bfcce0871e981121f64)
@@ -13,11 +13,13 @@
 	private var __y:Number;
 	private var _isDirty:Boolean;
 	private var infoObj:Object;
+	private var _btnState:Boolean = false;
     
 	/**
 	* Constructor.
 	*/
-	public function ToolbarModel (){
+	public function ToolbarModel (){
+		
 	}
     
     /**
@@ -37,6 +39,34 @@
     }
     
 	/**
+	* set the button state to enabled/disabled and set a changed flag and notify view and controller.
+    */
+	
+	public function setDefaultState(){
+		Debugger.log('setDefaultState is called: ',Debugger.GEN,'setDefaultState','Toolbar');
+		setButtonState("preview", false)
+	}
+
+	/**
+	 * 
+	 * @usage   
+	 * @param   btnName  
+	 * @param   btnState 
+	 * @return  
+	 */
+	public function setButtonState(btnName:Object, btnState:Boolean){
+		Debugger.log('button name in setButtonState is : '+btnName, Debugger.GEN,'setButtonState','ToolbarModel');		
+		
+		setChanged();
+		infoObj = {};
+		infoObj.updateType = "BUTTON";
+		infoObj.button = btnName
+		infoObj.buttonstate = btnState
+		notifyObservers(infoObj);
+		
+	}
+	
+	/**
 	* Used by View to get the size
 	* @returns Object containing width(w) & height(h).  obj.w & obj.h
 	*/
@@ -46,6 +76,17 @@
 		s.h = __height;
 		return s;
 	}  
+	
+	/**
+	* Used by View to get the button state enabled/disabled
+	* @returns Object containing true or false .  obj.newbtnstate
+	*/
+	
+	public function getState():Object{
+		var s:Object = {};
+		s.newbtnstate = _btnState;
+		return s;
+	}  
     
 	/**
     * sets the model x + y vars