On Wednesday 09 July 2003 02:51 am, Ingo Hohmann wrote:

> On further investigation, I am opening a system window with my
> object as model. It seems that after the system window is closed,
> the actionMap is empty.

> Does closeBoxHit somehow send release to the model?

Yes. Look at #delete.

It says:

	model windowIsClosing; release.

And, of course, release drops the actionMaps.

However, I think that it should be the model's choice whether to 
release or not here (that models that care should probably call 
release from #windowIsClosing, rather than having it forced on them 
from the window).

Among other things, this prevents you from having multiple 
SystemWindows on the same model.

As other people have commented, perhaps in Morphic the SystemWindows 
should behave more like other Morphs.

Still, there's the compatibility with MVC to consider: most of the 
models of the SystemWindows don't know or care that they're being 
used in Morphic. And in MVC the window is more central, since it also 
has the controller loop in it (with its ideas of focus, etc.)

But it's interesting to note that StandardSystemView (the MVC 
equivalent of SystemWindow) in its #release method *doesn't* call 
model release; it just says:

	model windowIsClosing.

> Yes, I now nil'ed out the model before closing, and the actionMap
> stays intact.
>
> Are there better ways to close a SystemWindow?

You could hide them, or collapse them, or move them offscreen if you 
wanted, but you're going to run into the same problem with the 
#closeBoxHit.

If you have your own subclass of SystemWindow, you could override 
#closeBoxHit and/or #delete to do what you want.

In my opinion, it should be possible to re-use SystemWindows (and 
other Morphs) once they've been deleted.

> Is this a bug, or do I miss something? (I guess, only those
> messages should be released which have to do with the SystemWindow,
> not all messages.)

That's right.

I'd look at this as a bug.

-- 
Ned Konz
http://bike-nomad.com
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