New event system...

I have commited updates for EvtHandler to cvs. I've also checked in a
little sample, called EventDemo.

Well, it works. And we do not have to add a HashTable to EvtHandler,
because with the new system the EventListener doesn't get added to a
Frame-, Dialog-... EvtHandler.listeners but to the EvtHandler of the
window it belongs to. ( A new instance of EvtHandler is created every
time a new Window instance is created as it is the base class of all
Windows).
What we also do not need is a parameter EventType in the callback
function ForwardEvent, as we are already forwarding an Event and so we
can check its type...

For example, button.Clicked += gets added to
Button.Control.Window.EvtHandler.listeners. EVT_BUTTON on the other hand
would add it to Frame.Window.EvtHandler.listeners.

The old system ( EVT_... ) gets handled like before. So it doesn't
benefit from the new possibility to add more than one EventListener to a
control, etc...

Alexander Olk



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