Delay help

On Jul 1, 10:56 am, Gregory Weston <u....RemoveThis@splook.com> wrote:
> In article
> <8b480d16-aafe-4baa-8b32-af0eac0fd....RemoveThis@27g2000hsf.googlegroups.com>,
>
>  JoeG <joe.gar....RemoveThis@gmail.com> wrote:
> > I am writing a program that calculates the various scores needed to
> > construct a DnD character. While doing the calculations, I ask the
> > user what skills they want trained by popping up a dialog panel. I
> > need to pause the rest of the calculations until the user pressed the
> > button in the dialog giving his choice. Everything I have tried so far
> > results in an infinite loop. Do I need to implement threading here, or
> > is there another option? Any suggestions would be greatly appreciated.
> > Thanks
>
> This isn't the problem threading was invented to solve; it's really
> almost the opposite. Essentially what you need to do is put the
> calculations on hold while collecting the new input. Just cache whatever
> you've got, display the dialog and let the normal event loop go. Then
> use the dismissal of the dialog as the signal to retrieve your cached
> information and resume the calc.
>
> The specific technique for doing that depends on information about your
> project which you haven't told us. The big question is: are you using
> Carbon or Cocoa?
>
> --
> "Harry?" Ron's voice was a mere whisper. "Do you smell something ... burning?"
>    - Harry Potter and the Odor of the Phoenix

I am using Cocoa and Xcode 3.0 to do this. This is also the first time
I've used Cocoa and Objective C to do this kind of project.

In article
<952e0b15-fd92-4795-966e-5e6b8b53433d.RemoveThis@m36g2000hse.googlegroups.com>,
JoeG <joe.garifo.RemoveThis@gmail.com> wrote:

> On Jul 1, 10:56 am, Gregory Weston <u....RemoveThis@splook.com> wrote:
> > In article
> > <8b480d16-aafe-4baa-8b32-af0eac0fd....RemoveThis@27g2000hsf.googlegroups.com>,
> >
> >  JoeG <joe.gar....RemoveThis@gmail.com> wrote:
> > > I am writing a program that calculates the various scores needed to
> > > construct a DnD character. While doing the calculations, I ask the
> > > user what skills they want trained by popping up a dialog panel. I
> > > need to pause the rest of the calculations until the user pressed the
> > > button in the dialog giving his choice. Everything I have tried so far
> > > results in an infinite loop. Do I need to implement threading here, or
> > > is there another option? Any suggestions would be greatly appreciated.
> > > Thanks
> >
> > This isn't the problem threading was invented to solve; it's really
> > almost the opposite. Essentially what you need to do is put the
> > calculations on hold while collecting the new input. Just cache whatever
> > you've got, display the dialog and let the normal event loop go. Then
> > use the dismissal of the dialog as the signal to retrieve your cached
> > information and resume the calc.
> >
> > The specific technique for doing that depends on information about your
> > project which you haven't told us. The big question is: are you using
> > Carbon or Cocoa?
>
> I am using Cocoa and Xcode 3.0 to do this. This is also the first time
> I've used Cocoa and Objective C to do this kind of project.

So do as much work as you can/want-to up front, cache your data and/or
partial results, display the sheet, and have the did-end method you
designated gather the rest of the data from the sheet and kick off the
next phase of the calculation.

<http://developer.apple.com/documentation/Cocoa/Conceptual/Sheets/Tasks/U
singCustomSheets.html#//apple_ref/doc/uid/20001290>

I'm not sure how to take the "to do this kind of project" phrase. If
you're fairly new to Objective-C, I'd recommend you spend the money to
get a copy of Aaron Hillegass' "Cocoa Programming for Mac OS X."

<http://www.bookpool.com/ss?qs=0321503619>

--
"Harry?" Ron's voice was a mere whisper. "Do you smell something ... burning?"
- Harry Potter and the Odor of the Phoenix

On 30/06/2008, JoeG wrote in message <8b480d16-aafe-4baa-8b32-
af0eac0fd1e7 RemoveThis @27g2000hsf.googlegroups.com>:

> I am writing a program that calculates the various scores needed to
> construct a DnD character. While doing the calculations, I ask the
> user what skills they want trained by popping up a dialog panel. I
> need to pause the rest of the calculations until the user pressed the
> button in the dialog giving his choice.

I don't understand why you need to pause the calculations just for that
period of time. Either you have the details you need, in which case you
may as well complete them, or you don't, in which case why start them ?

Simon.
--
http://www.hearsay.demon.co.uk