Question

How can I detect when a particular textbox has gain focus, (both by keyboard and by mouse click). For example, when you click on a text box I just want a Alert popup.

I’m trying to do something like

protected function textbox1_changeHandler(event:Event):void
    {
          if(textbox1.IsFocus){
             //run some code
          }
    }

I know IsFocus doesn’t exsist, but is there anything that will let me do the similar?

I’m using Flash Builder 4.6 and the component is mx:TextInput

Thanks

Answer 1

Use the focusIn event.

Conceptually like this:

<mx:TextInput focusIn="trace('received focus')"/>

---

If you want to find out if a textInput has has focus, you can use the getFocus() method. Conceptually like this:

if(myComponent.getFocus() == myComponent){
 trace('component has focus');
} else {
 trace('component does not have focus');
}