function onStartDrag(evt:MouseEvent):void {
    evt.currentTarget.startDrag();
}

The currentTarget is the object to which the listener is attached. So, only the keyboard will drag.

Below is a code example that makes a parent box (p) with multiple children boxes (c). I want the patent to drag but not the children. Imaging I’m building a keyboard where I want to be able to move the entire keyboard but not individual keys.

How do I stop the children from being individually draggable?

package {

   import flash.display.Sprite;
   import flash.events.MouseEvent;

   public class Main extends Sprite {

      public function Main() {
         var p:Sprite = new Sprite();
         p.graphics.lineStyle(2,0x62555E);
         p.graphics.beginFill(0xF2E8E8);
         p.graphics.drawRoundRect(0, 0, 400, 200, 10);
         p.graphics.endFill();
         p.x = 10;
         p.y = 100;
         addChild(p);

         p.addEventListener(MouseEvent.MOUSE_DOWN, onStartDrag,
                            false, 0, true);
         p.addEventListener(MouseEvent.MOUSE_UP, onStopDrag,
                            false, 0, true);

         var boxX:int = 50;
         for (var i=0; i < 8; i++) {
            var c:Sprite=new Sprite;
            c.name = "c_" + i;
            c.graphics.lineStyle(NaN, 0xffffff);
            c.graphics.beginFill(0x627b78);
            c.graphics.drawRoundRect(boxX, 30, 30, 30, 10);
            c.graphics.endFill();
            p.addChild(c);
            boxX  += 40;
         }

      }
      function onStartDrag(evt:MouseEvent):void {
         evt.target.startDrag();
         evt.stopPropagation();
         //evt.stopImmediatePropagation();
      }
      function onStopDrag(evt:MouseEvent):void {
         evt.target.stopDrag();
      }
   }
}