Re: Headcount

From: Magnus Lie Hetland <[email protected]>
>
> Right. My first thought was to introduce yet another cusomisable
> mechanism for deciding which setFoos are excempt from the "if None"
> guard... But it seems that customisable things like these are
> proliferating, and I'm not sure if it's just a groove I can't get out
> of ;)
>
> But it is a possibility... I.e.:
>
>   if (not self.mustHaveWidget(attr)) or self.widget is not None:
>       # Set the attribute
>

that's a possibility.

> All getters can be protected, I guess.

They already are: in Proxy.pull there's a

        if not self.wrapper.widget: return

>
> And another thing: We could introduce a specific exception for
> handling this. I.e. the getter code could raise a NoWidgetException if
> we try to get an attribute before there's a widget; the front-end
> could ignore that, because the value would be in proxy.state. If we
> have something like the DummyWidget that raises this exception on all
> attribute accesses, that could be used instead of comparing with None
> too... But without much gain, I guess. (The None stuff is simple,
> clean, and easy to understand.)
>

You are all fond of exceptions but exceptions are slow <wink>., especially in
jython :(.
Anyway see above.

regards.



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