private function drawBox():void{
      var aBox:Shape = new Shape();
      var c:UIComponent = new UIComponent();
      
      aBox.graphics.lineStyle(lineWidth_ns.value, line_cp.selectedColor);
      aBox.graphics.beginFill(fill_cp.selectedColor, 1);
     
      aBox.graphics.drawRect(x_ns.value, y_ns.value, width_ns.value, height_ns.value);
      aBox.graphics.endFill();
      c.addChild(aBox);
      canvas.addChild(c);
     }
    ]]>
   </mx:Script>