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Re: Bindings, User Defaults and the UI
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Re: Bindings, User Defaults and the UI


  • Subject: Re: Bindings, User Defaults and the UI
  • From: Julian <email@hidden>
  • Date: Wed, 28 Sep 2005 20:52:19 -0400

Hey Jeffery,
For the 5th checkbox just add an IBAction like so and wire it up:

- (IBAction)test:(id)sender {
[[[NSUserDefaultsController sharedUserDefaultsController] values] setValue:THE_VALUE forKey:@"k1"];
[[[NSUserDefaultsController sharedUserDefaultsController] values] setValue:THE_VALUE forKey:@"k2"];
[[[NSUserDefaultsController sharedUserDefaultsController] values] setValue:THE_VALUE forKey:@"k3"];
[[[NSUserDefaultsController sharedUserDefaultsController] values] setValue:THE_VALUE forKey:@"k4"];
}


With all 4 other bound keys and whatever THE_VALUE, prob [NSNumber numberWithBool:YES || NO]

This will validate the items immediately and update the UI.

~Julian

On Sep 28, 2005, at 8:23 PM, Jeffrey E. Forcier wrote:

Greets all,

I'm attempting to set up a pseudo-prefpane utilizing an NSUserDefaultsController and some checkboxes bound to its values. However, when I set those values programmatically, the checkboxes do not correctly update to reflect the change.

Four checkboxes are bound directly to user defaults values, and a fifth checkbox reflects/sets the other four as a set. E.g. when the other four are off, its state is NSOffState; all on, NSOnState; some on and some off, NSMixedState. Clicking the fifth checkbox directly sets or clears all of the other four at once (or should, anyway).

The four checkboxes work fine on their own, as you'd expect. My custom code to provide the fifth checkbox's behavior works with regards to the reflection, as above (a method to update it is set via target-action on the other four).

My problem is that when I click on the fifth checkbox, the code for that--which sets all four values in the user defaults to true or false, depending--sets the controller values fine, but the checkboxes *do not reflect the changes*.

I found a note in the Cocoa Bindings docs describing this situation, which said to use proper key-value encoding when setting values programatically. At the time I had been using an NSUserDefaults object in the code, so I figured that was the issue.

But updating all my code to use NSUserDefaultsController.values() and its associated key-value compliant methods has not solved the problem. Any ideas?

Apologies for the newbieness as usual,
Jeff

--
Jeffrey E. Forcier
Junior Developer, Research and Development
Stroz Friedberg, LLC
15 Maiden Lane, 12th Floor
New York, NY 10038
[main]212-981-6540 [direct]212-981-6546
http://www.strozllc.com

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 >Bindings, User Defaults and the UI (From: "Jeffrey E. Forcier" <email@hidden>)

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