On Dec 27, 2009, at 5:41 PM, Iceberg-Dev wrote: > On Dec 27, 2009, at 11:48 PM, Graham Cox wrote: > >> On 28/12/2009, at 9:40 AM, Iceberg-Dev wrote: >> >>> Problem: what if you need to access the contextual info from the >>> panel:shouldShowFilename: method? >>> >>> >>> I haven't found a method to access the contextual information in >>> NSSavePanel, NSPanel, NSWindow. >> >> >> Typically the delegate is the controller that calls beginSheet... so >> whatever it passed as contextInfo is available to any delegate method >> because it's something internal to this controller object. > > Can't disagree with that. > >> If you've organised your code in such a way that the controller is not the >> delegate, you might want to reconsider that. > > I could but isn't the purpose of a contextual info to be "contextual" and so > not attached to the controller instance?
The panel's delegate and its modalDelegate are two logically separate things (although you may choose to use the same object for both roles). The modalDelegate is only messaged with the didEndSelector that you provide, and the contextInfo is passed as a parameter in that message. Any of the delegate methods (as opposed to the modalDelegate method) are not provided the contextInfo. The contextInfo is only relevant to the modalDelegate. While you may use the controller that calls beginSheet:... as the delegate, you may also use a separate object that knows about a specific instance of the panel -- that is, you might wrap up the delegate behavior and what you're thinking of as context info into a class and pass an instance of that. That allows a single controller to run multiple open panels simultaneously without crossing its wires (although I would probably recommend using a controller per instance). Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
