Code for listening to FW events

gistfile1.as

private const SupportedFWEvents:Object = {
	onFwActiveDocumentChange: 1,
	onFwActiveSelectionChange: 1,
	onFwActiveToolChange: 1,
...
};

private function onPreinitialize() : void
{
		// we need to register these callbacks early in the startup process.
		// registering them from applicationComplete is too late. 
	if (ExternalInterface.available) {
		ExternalInterface.addCallback("IsFwCallbackInstalled",
			onIsFwCallbackInstalled);

			// create a handler for all the supported events.  we don't know yet
			// which events the JSML will actually listen for, but we have to
			// create the handlers now.  otherwise, we'll never get the events.
		for (var eventName in SupportedFWEvents) {
			ExternalInterface.addCallback(eventName,
				createFWEventHandler(eventName));
		}
	}
}



private function onIsFwCallbackInstalled(
	inFunctionName:String) : Boolean
{
	return (inFunctionName in SupportedFWEvents);
}



private function createFWEventHandler(
	inEventName:String) : Function
{

		return function()
			{
//console.log("method", inEventName);

					// only pass the event to the panel if it's actually listening
					// for it, to avoid the overhead of passing data to the JS side.
					// switching documents triggers 4 events, so they can add up.
				if (inEventName in registeredFWEvents) {
					onAppJSEvent({ type: inEventName });
				}
			};

}