How do I check if the user is typing in a text field? - actionscript-3

Question

How would you check if the user is typing into a text input (Flex TextArea, TextInput, RichEditableText)?
In my AIR app I want to listen for keyboard events on the application but I only want to respond if they are not typing into a text field and if no other component handles it.
For example, I want to listen to the A key and run a command. But only if they are not typing into a text field.
FYI I added a NativeFlexMenu and added keyboard modifier to it for A and it is capturing the key event even when the user is typing in a text field.

Answer 1

This appears to work when added to the application. The one problem with this is that if a text field has focus it will continue to have focus even if you click on the application. I might try to add an click event handler to change focus.
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication keyUp="application1_keyUpHandler(event)"
keyDown="application1_keyDownHandler(event)">
</s:WindowApplication>
protected function application1_keyDownHandler(event:KeyboardEvent):void {
var keyCode:int = event.keyCode;
var applicable:Boolean;
var focusedObject:Object;
var target:Object = event.target;
if (keyCode==Keyboard.A ||
keyCode==Keyboard.B ||
keyCode==Keyboard.C) {
if (!event.controlKey && !event.commandKey) {
applicable = true;
}
}
if (!applicable) return;
focusedObject = focusManager.getFocus();
if (focusedObject is Application || event.target is Stage) {
isApplication = true;
}
//var t:int = getTimer();
if (target is RichEditableText ||
focusedObject is IEditableText ||
focusedObject is SkinnableTextBase ||
focusedObject is TextField ||
focusedObject is FTETextField ||
focusedObject is FlexHTMLLoader ||
focusedObject is ComboBox) {
applicable = false;
}
//trace("time:" + (getTimer() - t)); takes 0 ms
if (applicable) {
if (keyCode==Keyboard.A) {
// do something
}
else if (keyCode==Keyboard.B) {
// do something
}
else if (keyCode==Keyboard.C) {
// do something
}
}
}