• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
NSToolbarItem enable binding
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

NSToolbarItem enable binding


  • Subject: NSToolbarItem enable binding
  • From: Camille GOUREAU-SUIGNARD <email@hidden>
  • Date: Sat, 6 Jan 2007 09:21:27 +0100

Hi,

my problem is: the automatic validation of a toolbarItem via binding.

Entity B has a relationship whose destination is entity A with a delete rule 'Deny'.
Entity A populates an arrayController (C).
A tableView (D) has its rows binded to C.
A toolbarItem (E) has its action set to 'remove:' method from C (NSArrayController).
A deletable row/managed object (A) is one that is not the destination of any instance of B.
So I want E (NSToolbarItem) to be enbled/validated only if the selected instance of entity A is deletable (validateForDelete:).


I subclassed NSManagedObject to define entity A and created the method:

- (BOOL) deletable ;
{
	NSError	*erreur = nil ;
	return [self validateForDelete: &erreur] ;
}

I binded E (NSToolbarItem) 'enabled' to C with controller key 'selection' and model key path 'deletable'.

And my toolbarItem behaves very strangely: it isn't enabled for a few microseconds (when deletable is called) then immediatly re-enabled.
And I don't understand why.


1. could you explain me why it is re-enabled ?
2. is there a more elegant way to achieve my goal ?

Thanks a lot.

Camille Goureau

Et mon blog: www.lutin-ludique.com/bradype/


_______________________________________________

Cocoa-dev mailing list (email@hidden)

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:
This email sent to email@hidden


  • Prev by Date: Re: NSPopupButton with NSArrayController
  • Next by Date: Re: regarding transparent NSWindow.
  • Previous by thread: Re: Getting File Info
  • Next by thread: NSCell with various fonts
  • Index(es):
    • Date
    • Thread