package 
  {
    // import statements
    import mx.controls.Button;
  
    // class name
    public class @ax-professional-flex-code-13-ValidateButton extends Button {
              
      // define properties
      [Embed(source="good.png")]
      private var checkIcon:Class;
  
      [Embed(source="bad.png")]
      private var xIcon:Class;
  
      private var _isValid:Boolean;
              
      // default constructor
      public function @ax-professional-flex-code-13-ValidateButton (){
        // a good practice is to include a call to super(). 
        super();      
        this.setStyle("icon",xIcon);
      }
      
      // getters and setters    
      public function get isValid():Boolean{
        return this._isValid;
      }
      public function set isValid(b:Boolean):void{
        this._isValid = b;
        if(b){
          this.setStyle("icon",checkIcon);
        }else{
                 this.setStyle("icon",xIcon);
        }
      } 
      
      // a method to return propeties
      public function getProperties():String{
        var s:String = "Label = " + this.label + "\n" + 
          "Width = " + this.width + "\n" + 
          "Height = " + this.height;
        return s;
      }
      
      // an override to add parentheses to the label
      override public function get label():String{
        return "("+super.label+")";
      }
             
    }
  }