Flash / Flex / ActionScript/Graphics/Checkbox

Removing Event Listeners

 
package {
  import flash.display.*;
  import flash.events.*;
  import flash.text.*;
  public class CheckBox extends Sprite {
    private var label:TextField;    // The checkbox"s text label
    private var icon:CheckBoxIcon;  // The checkbox"s graphical icon
    private var checked:Boolean;    // Flag indicating whether the
                                    // checkbox is currently checked
    public function CheckBox (msg:String) {
      checked = false;
      icon = new CheckBoxIcon(  );
      label = new TextField(  );
      label.text = msg;
      label.autoSize = TextFieldAutoSize.LEFT;
      label.selectable = false;
      label.x = icon.x + icon.width + 5;
      addChild(icon);
      addChild(label);
      addEventListener(MouseEvent.CLICK, clickListener);
    }
    private function clickListener (e:MouseEvent):void {
        if (checked) {
            icon.uncheck(  );
            checked = false;
        } else {
            icon.check(  );
            checked = true;
        }
    }
  }
}
class CheckBoxIcon extends flash.display.Sprite {
    public function CheckBoxIcon (  ) {
      uncheck(  );
    }
    public function check (  ):void {
      graphics.clear(  );
      graphics.lineStyle(1);
      graphics.beginFill(0xFFFFFF);
      graphics.drawRect(0, 0, 15, 15);
      graphics.endFill(  );
      graphics.lineTo(15, 15);
      graphics.moveTo(0, 15);
      graphics.lineTo(15, 0);
    }
    public function uncheck (  ):void {
      graphics.clear(  );
      graphics.lineStyle(1);
      graphics.beginFill(0xFFFFFF);
      graphics.drawRect(0, 0, 15, 15);
    }
  }
}