Re: Design patterns

FROM : Mike Abdullah
DATE : Sun Jul 23 18:52:34 2006

On 23 Jul 2006, at 12:46PM, Trygve Inda wrote:

> I am wondering what the general consensus is on handling sheets. I 
> currently
> have two simple sheets managed by my AppController which require a few
> methods:
>
> - (IBAction)showPluginWindow:(id)sender
> - (void)pluginTableDoubleClick:(id)sender
> - (IBAction)okButtonAction:(id)sender
> - (IBAction)cancelButtonAction:(id)sender
> - (void)sheetDidEnd:(NSWindow *)sheet returnCode:(int)returnCode
> contextInfo:(void *)contextInfo
>
> I have similar methods for a prefs sheet. Should these be put into 
> separate
> objects?
>
> Both sheets act upon data that the main app needs to know about, 
> although
> with the prefs sheet I have a dict in my main app that just has a 
> series of
> keys for the user preferences.
>
> The sheets are stored in my main nib file. Is there any advantage 
> to moving
> them to their own nib and making the separate objects?


I don't know in your particular case (it all depends what the sheet s 
doing really), but I generally put my sheets in their own NIB and 
make the owner a custom NSWindowController.  I then create the window 
controller when the sheet is required and use the window controller 
to handle any logic specific to the sheet.
>
> If I had a complex window that really needed a window Controller, I 
> would
> use a different nib and make it an object, but for relatively 
> simple sheets
> with a few controls, what do the masses think?
>
> I guess some of this leads to... How many methods in a class is 
> reasonable
> and is there any way (good idea?) to move some of them into a separate
> source file. (Can, or is it normal for a class have more then 
> one .m file?)


I think you're after a "Category" :)
>
> Thanks,
>
> Trygve
>
>
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