On 01 May 2012, at 7:42 pm, Quincey Morris wrote: > 3. That protocol has a method 'control:isValidObject:'. > >> "This method gives the delegate the opportunity to validate the contents of >> the control’s cell (or selected cell). > > That seems like what you want, if you query the formatter directly from this > delegate method.
I hadn't noticed that one before. However, for some reason, it does not get called on my delegate. > Whether NSTableView has an automated mechanism for querying the formatter > itself, I don't know, and I can't find any documentation that suggests it > might. Well, the NSControlTextEditingDelegate protocol also provides 'control:didFailToFormatString:errorDescription:', which seems to be to the point of what I want: > Invoked when the formatter for the cell belonging to the specified control > cannot convert a string to an underlying object. > > Return Value: YES if the value in the string parameter should be accepted as > is; otherwise, NO if the value in the parameter should be rejected. And unlike control:isValidObject:, it does get called on my delegate. Unfortunately, my return value of NO seems to be ignored. The thing about all this is that a few revs back, when I was using a dumb array with NSTableViewDataSource and no bindings, I was getting the validation behaviour for free. Now it's gone. I guess I should re-trace my steps and try to figure out what subtle critical difference I've introduced. cheers, b -- Ben Kennedy, chief magician Zygoat Creative Technical Services http://www.zygoat.ca _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
