custom MXML container in Flex 4

Question

I want to make a custom container, usable in MXML like:

<local:MyContainer>
  <s:Label/>
  <s:Button/>
  ...
</local:MyContainer>

...but I'd like to be able to catch when the children are added so that I can control stuff like when & where they're added.

I tried overriding addChild(), addChildAt(), addElement(), addElementAt(), (extending the Group class) but they only fire when you add elements specifically with those functions - the application launches and the label, button, etc, end up in MyContainer without calling these functions.

How do I control the addition of sub-components via MXML? Am I on the wrong track - should I be writing a custom layout and/or skin instead?

Answer 1

You could try to overwrite the setter of the mxmlContent-Array. Probably this is used instead of addChild()...