How to detect when nested movieclip reaches last frame

[Lou22]

I would be grateful for help - it seems like something standard but I can't work out how to do it, and I would like to do it neatly:

I want to be able to detect when a nested movieclip reaches its last frame so that:
1. it (the movieclip) and its parent (example1) can be removed, and
2. a new movieclip (example2) can replace it.

I have:

1. a document class, to which is added dynamically:
2. mc_background, to which is added dynamically:
3. mc_example1, to which is added dynamically (on frame 3)
4. mc_try(this is several frames with a navigation button). (note: I have added mc_try to mc_example on frame 3 where it is needed, because it was the only way I could get stage.focus on the input textfield on mc_try to work with flashing cursor.)

I need -- mc_background to detect -- when mc_try reaches its last frame so that mc_example1(parent of mc_try) can be removed and replaced with mc_example2.

I thought this could be done with an event dispatcher on last frame of mc_try but I don't understand how to get mc_background to detect when this event occurs. Perhaps with enterframe but I thought this was bad practice.

Any help gratefully received.

[abeall]

The way I'd probably do this is to dispatch an event on the last frame of the child MovieClip as a bubbling event, and listen for it in the parent class code.

// on the last frame of the mc_try
dispatchEvent(new Event("ExampleComplete", true));

// in your background class
addEventListener("ExampleComplete", exampleCompleteHandler);
function exampleCompleteHandler(e:Event):void {
    // swap examples
}

[henke37]

I would just add the listener to the right object instead of using a bubbling event. It helps when you use the same event type multiple times.

[Lou22]

Thanks so much for the help - it works now!