visibleLayers change issue

Question

API Team,

Several times I have asked for an event to added to the API that would fire when the visibleLayers ArrayCollection of a layer has changed and you have always said that I could just listen for the visibleLayers ArrayCollection change event. Well I have tried and tried again and I can not seem to get your suggestion to work... Here is what I an trying:ArcGISDynamicMapServiceLayer(layer).visibleLayers.addEventListener(CollectionEvent.COLLECTION_CHANGE,updateVisibilty);

Can you assist me in getting your suggestion to work?

RobertScheitlin__GISP · Answer

Dasa,

Your Adobe Knowledge is unmatched... Thanks again.

DasaPaddock · Answer

Since it's a bindable property you can use the ChangeWatcher.watch() method. Reference: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/binding/utils/ChangeWatcher.html

RobertScheitlin__GISP · Answer

Dasa,

Thanks for the sample...

I have an issue implementing it in the Flex viewer both 2.0 and earlier as the TOC does this instead of changing the visibleLayers arraycollectionArcGISDynamicMapServiceLayer(layer).visibleLayers = new ArrayCollection(visLayers);

Is there some event that I can use for the arrayCollection being replaced?