Adobe FLEX 2 - CREATING AND EXTENDING COMPONENTS, Руководство пользователя

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Writing an effect for a transition 245
// Check whether angleTo is set.
if (isNaN(angleTo))
{
// If not, look in propertyChanges.end for a value.
// Otherwise, set it to 360.
angleTo = (propertyChanges.end["rotation"] != undefined) ?
propertyChanges.end["rotation"] : 360;
}
// Create a Tween object. The tween begins playing immediately.
var tween:Tween =
createTween(this, angleFrom, angleTo, duration);
}
// Override onTweenUpdate() method.
override public function onTweenUpdate(val:Object):void {
target.rotation = val;
}
// Override onTweenEnd() method.
override public function onTweenEnd(val:Object):void {
// All classes that implement onTweenEnd()
// must call super.onTweenEnd().
super.onTweenEnd(val);
}
}
}