Bindings and nested checkboxes and enabled
I have two checkboxes in a preferences window which are bound to user defaults. The second checkbox should only be enabled if the first checkbox its true. I have this working great with bindings. The second checkboxe's enabled binding is bound to the value of the first one. However, if the first checkbox becomes false, the second checkbox goes unenabled, but remains checked. Is there any way with bindings to get the second checkbox to reset to false when the first checkbox is unchecked. I can't bind them both to the same value because there are cases when the first checkbox would be true and the second one would be false. If you need a visual: http://screencast.com/t/BbQOybP2KjN Thanks, Adam ___ 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
Re: Bindings and nested checkboxes and enabled
On Mar 15, 2009, at 8:41 PM, Adam Gerson wrote: I have two checkboxes in a preferences window which are bound to user defaults. The second checkbox should only be enabled if the first checkbox its true. I have this working great with bindings. The second checkboxe's enabled binding is bound to the value of the first one. However, if the first checkbox becomes false, the second checkbox goes unenabled, but remains checked. Is there any way with bindings to get the second checkbox to reset to false when the first checkbox is unchecked. I can't bind them both to the same value because there are cases when the first checkbox would be true and the second one would be false. If you need a visual: http://screencast.com/t/BbQOybP2KjN Thanks, Adam Hi, Adam, You'll probably want to set up a target-action method to do this, rather than trying to get a pure-bindings solution. The enabling can be done with bindings, certainly, but you can the act of resetting the checked state will likelyrequire a call to -[NSButton setState:] with a parameter of NSOffState from an IBAction called from the first checkbox. Hope this helps! Cheers, Andrew ___ 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
Re: Bindings and nested checkboxes and enabled
The logical answer is for some object in your application (probably your application delegate) to observe the first property using KVO and update the second property accordingly. After all, don't you want to update the second default anyway when the first changes? You also should be binding your second checkbox's enabled property to the same keypath as the first checkbox's value; bindings are usually done from view to controller, not view to view. --Kyle Sluder ___ 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
