Cairngorm Code

package samples
{
    import com.adobe.cairngorm.task.Task;

    import mx.events.StyleEvent;
    import mx.styles.StyleManager;

    /**
     * A task that loads a runtime stylesheet.
     */
    public class LoadStylesheet extends Task
    {
        //------------------------------------------------------------------------
        //
        //  Private properties
        //
        //------------------------------------------------------------------------

        private var loader:IEventDispatcher;

        //------------------------------------------------------------------------
        //
        //  Public properties
        //
        //------------------------------------------------------------------------

        //-------------------------------
        //  Simple bindables
        //-------------------------------

        [Bindable]
        public var url:String;

        //------------------------------------------------------------------------
        //
        //  Implementation : TaskflowTask
        //
        //------------------------------------------------------------------------

        override protected function performTask():void
        {
            if (url == null)
                fault();

            loader = StyleManager.loadStyleDeclarations(url);
            loader.addEventListener(StyleEvent.COMPLETE, onLoadingComplete);
            loader.addEventListener(StyleEvent.ERROR, onLoadingError);
        }

        //------------------------------------------------------------------------
        //
        //  Event listeners
        //
        //------------------------------------------------------------------------

        private function onLoadingComplete(event:StyleEvent):void
        {
            loader.removeEventListener(StyleEvent.ERROR, onLoadingError);
            cleanUp();
            complete();
        }

        private function onLoadingError(event:StyleEvent):void
        {
            cleanUp(); // TODO Don't clean-up fault listener due to framework bug!
            fault();
        }

        private function cleanUp():void
        {
            loader.removeEventListener(StyleEvent.COMPLETE, onLoadingComplete);
            loader = null;
        }
    }
}