Question

Hello i have a function as following:

private function seatClickHandler(e:MouseEvent):void{

            var check:Check = new Check();
            if(e.target.contains(check)){
                e.target.removeChild(seat);
            }else{
                e.target.addChild(check);
            }
        }

basicly i want to check if e.target contains a child called check. If it does i want e.target to remove the child, else i want to add the child. But the method i tried doesnt seem to work although i think this is the way to go. Any suggestions?

Answer 1

When you declare your Check object, Actionscript creates a reference code for that specific object.

So the first time your code is run, your Check object could be given a reference of @c0ecc29. Your if statement checks to see if @c0ecc29 is a child component of target. It won’t be, so the Check object with reference @c0ecc29 is added to target.

The second time the clickHandler is called, a new instance of the Check object is created which will have a new reference id. Your target has the original Check object with the @c0ecc29 reference so it won’t get removed.

The correct way to get this working depends on what target is (DataGrid, Group, etc.).

EDIT:
Based on your comments, I would try something like this. It checks to see if the Check object is a child of target and adds it if needed. Then when the Check object is clicked, it will toggle its visibility.

public var check:Check = new Check();

private function seatClickHandler(e:MouseEvent):void
{
  if(!e.target.contains(check))
  {
    check.addEventListener(MouseEvent.CLICK, check_handleClick);
    e.target.addChild(check);
  }
}

protected function check_handleClick(event:MouseEvent):void
{
  check.visible = !check.visible;
}

If you need to actually remove the Check object from target instead of just changing its visibility, you could try this:

public var check:Check = new Check();

private function seatClickHandler(e:MouseEvent):void
{
  if(!e.target.contains(check))
  {
    e.target.addChild(check);
  }
  else
  {
    e.target.removeChild(check);
  }
}