Remove focus from input on click outside - actionscript-3

Question

I'm using Flex 4.6 with spark components. I have form with DropDownList, and I want to achieve next behaviour:
user clicks on text input in DropDownList -> DropDownList get focus
user clicks outside (on background Rect, for example) -> DropDownList lose focus
Suddenly, second part doesn't work from box. DropDownList still in focus when user clicks outside the text input. How to implement required behaviour?
Example:
<?xml version="1.0"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark">
<fx:Script><![CDATA[
]]></fx:Script>
<s:TextInput />
</s:Application>
If you click on TextInput it gets focus. And you cannot remove this focus by clicking outside TextInput.

Answer 1

I found solution at the official forum. There is a post with same problem.
And working solution in the end:
textInput.addEventListener(FocusEvent.MOUSE_FOCUS_CHANGE, textInputMouseFocusChange, false, 0, true);
// basically the above Event will dispatch when ever the user clicked outside of textinput when the current focus in in textInput.
private function textInputMouseFocusChange(event:FocusEvent):void {
// basically u dont need this first line if u are not calling any function on textInput focusout.
textInput.dispatchEvent(new FocusEvent(FocusEvent.FOCUS_OUT));
// the remaing peice of code will remove the current focus from textInput to the area where the user had clicked.
// this piece of code i have taken from one of the comments in the blog : http://blog.flexexamples.com/2008/09/23/setting-focus-in-flex-using-the-focus-manager/
var focusPoint:Point = new Point();
focusPoint.x = stage.mouseX;
focusPoint.y = stage.mouseY;
var i:int = (stage.getObjectsUnderPoint(focusPoint).length);
stage.focus=InteractiveObject(stage.getObjectsUnderPoint(focusPoint)[i-1].parent);
}

Answer 2

First of all, I think that you are speaking about the ComboBox spark component and not the DropDownList because you have mentioned the TextInput of the component which is a Label control in the case of a DropDownList.
Then, to remove the focus from the ComboBox component, you can set the stage.focus to null when the change event of your component is fired :
<s:ComboBox change="on_Change(event)" />
And
protected function on_Change(event:Event):void
{
stage.focus = null;
}
Hope that can help.