Hello Jean-Noël, extending a singleton class is currently not supported. I think it's not an easy task anyway. Both classes do have the getInstance method. But what should they return? Always the instance of the extended class, or an instance of the class you are using? The last option could get some problem if you call it on both classes. You would have two objects which is kind of odd for a singleton. But you can always patch a class using a mixin, or don't use the qooxdoo singleton type and implement the singleton pattern by yourself. But then you have to take care of the problems I just described. Best, Martin -- View this message in context: http://n2.nabble.com/Extending-a-singleton-class-tp4593441p4596651.html Sent from the qooxdoo mailing list archive at Nabble.com.
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