On May 1, 2012, at 19:20 , Ben Kennedy wrote: > The issue I'm still having is that non-bound columns (i.e., those controlled > by the latter two NSTableViewDataSource methods) are not enforcing validity > when the attached formatter returns NO from > getObjectValue:forString:errorDescription:.
I don't know that I've ever had to deal with this specific scenario, but examination of the documentation leads to the following observations: 1. You can implement a table view delegate that conforms to the NSTableViewDelegate protocol. 2. That's a sub-protocol of the NSControlTextEditingDelegate protocol. 3. That protocol has a method 'control:isValidObject:'. 4. The documentation of that method: > https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/NSControlTextEditingDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intf/NSControlTextEditingDelegate says this: > "This method gives the delegate the opportunity to validate the contents of > the control’s cell (or selected cell). In validating, the delegate should > check the value in the object parameter and determine if it falls within a > permissible range, has required attributes, accords with a given context, and > so on. Examples of objects subject to such evaluations are an NSDate object > that should not represent a future date or a monetary amount (represented by > an NSNumber object) that exceeds a predetermined limit." That seems like what you want, if you query the formatter directly from this delegate method. 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. I bet there's an easier answer staring us right in the face. _______________________________________________ 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
