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AS3 Keep Track of Where FocusRect Is Whilst Tabbing

/ Published in: ActionScript 3
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This code traces out the name (and display list path) of the object that currently has focus. This handy when you are testing the tab order and you can't see a yellow rectangle anywhere.

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  1. import flash.events.FocusEvent;
  2.  
  3. stage.addEventListener(FocusEvent.FOCUS_IN, onStage_FOCUS_IN);
  4.  
  5. function onStage_FOCUS_IN(event:FocusEvent):void
  6. {
  7. 	focusInPath(DisplayObject(event.target));
  8. }
  9.  
  10. function focusInPath(dispObj : DisplayObject, s : String = ""):void
  11. {
  12. 	if (dispObj.parent != null) {
  13. 		focusInPath(dispObj.parent, s + "." + dispObj.name);
  14. 	} else {
  15. 		var a:Array = s.split(".").reverse();
  16. 		var output:String = "";
  17. 		for (var i : Number = 0; i < a.length; i++) {
  18. 			output = output + "." + a[i];
  19. 		}
  20. 		trace("FOCUS_IN: " + output.substr(1, output.length - 2));
  21. 	}
  22. }

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