On Tue, 27 Jan 2009 17:10:20 -0800, Jerry Krinock <je...@ieee.org> said:
>Butt if the possible problem involves a document, I believe it would
>be a better user experience to use a sheet instead of a dialog. But,
>arghhh, the method
> -[NSApp
>beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo:]
>returns immediately, sending its return message to a modal delegate
>selector. So I must go back up the nest, all the way up to the event
>which drove the process, and split all these methods into two methods,
>the code "before" and "after" the sheet runs. Repeat this for all
>other possible entry points into this innermost method. And there
>goes another afternoon.
>
>-(void)methodC1 {
> // Some code here (C1)
>
> [NSApp beginSheet:...
> modalForWindow:...
> modalDelegate:self
> didEndSelector:@selector(didEndSheet:returnCode:contextInfo:)
>}
The delegate does not have to be self, and the didEndSelector does not have
to be named didEndSheet: (it can have any name you like, as long as its
parameters are NSWindow*, int, void*). So, yes, it's true that methodC1 now
ends and we have to re-enter elsewhere, but it is up to you *where* we
reenter, and you can use that fact to help straighten out some of the logic.
Furthermore, when there is a sequence of events that can bring up a sequence
of sheets in various ways according to various logic, don't forget about
contextInfo. The contextInfo that you hand in to the call to beginSheet:
comes back out in your didEnd method, so it can tell that method where to go
next. It might be some sort of carrier of state and/or even an invocation.
m.
--
matt neuburg, phd = m...@tidbits.com, <http://www.tidbits.com/matt/>
A fool + a tool + an autorelease pool = cool!
One of the 2007 MacTech Top 25: <http://tinyurl.com/2rh4pf>
AppleScript: the Definitive Guide - Second Edition!
<http://www.amazon.com/gp/product/0596102119>
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