On Mar 18, 2011, at 10:14 PM, Ken Thomases wrote: > On Mar 18, 2011, at 3:45 AM, Christian Ziegler wrote: > >> I'm having hard times figuring out how to bind an NSMatrix properly. I got >> an NSMatrix with NSButtonCells (checkboxes) and I want to somehow bind to my >> model which of these checkboxes are selected. What should work is binding >> the content objects of the NSMatrix to an ArrayController and fill the >> arrayController's content with NSButtonCells programmatically. > > Huh? An NSMatrix is a view (in the Model-View-Controller design pattern), an > array controller is a controller, and it provides access to model data. > NSButtonCells are not model data, they are elements of the view. You don't > "fill the arrayController's content with NSButtonCells".
Hehe shame on me! > > You should have a model property somewhere which is an array of objects to be > presented in the matrix. This might be as simple as strings for the names of > the checkboxes, or it might be objects each of which has a property which > will be the name of a checkbox. You bind the array controller's contentArray > to this model property (the array of objects). > > You then bind the matrix's content to the array controller's arrangedObjects. > If the objects are not themselves the values for the checkboxes, you also > bind the matrix's contentValues to the array controller's arrangedObjects > with a model key path which obtains the values for the checkboxes. > > You can bind the matrix's selectedObjects or selectedValues to another > controller's property, which is a to-many property with the appropriate > mutation accessors. You bind selectedObjects if you want to track the > objects which correspond to each checkbox. You bind selectedValues if you > want to track the values, if there's a distinction (see previous paragraph). > > It should also work to bind the matrix's selectedObjects to the array > controller's selection. Then you can bind the array controller's > selectionIndexes to a property of your coordinating controller (e.g. File's > Owner). That way, your property which tracks the selection can be related > back to the property which provided the array controller's content, instead > of merely being another array which shares some elements. > > I hope that helps. > > Regards, > Ken > Thanks Ken. I was assuming that it works that way, however I figured there must be an easier way. I will write a nice little model object then :) Cheers, Chris _______________________________________________ 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
