mx:Canvas 's Show event equalivent in s:Group

As of Flex 4, I'm using s:Group instead of mx:Canvas.

With s:Group 开发者_如何学C, show event is not fired when the container is visible like with mx:Canvas. creationComplete event fire only once. How can I detect show event or something alike in Flex 4 or should I just use the mx:Canvas instead ?

Any kind help is appreciated.

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what about enterState or show events?