On 9/10/12 7:15 PM, "Quincey Morris" <[email protected]> wrote:
>On Sep 10, 2012, at 18:40 , Chuck Soper <[email protected]> wrote: > >> I understand how to bind an array controller (for an entity) to rows in >>a >> table, and how to bind a Text Field in the Table Cell View to an entity >> property. I'm not sure how to go about this for columns in a table. I >> assume that I may need to take a programmatic approach. Has anyone done >> this? Or, can someone point me in the right direction? > >You can't do this with bindings. Tables are row-oriented, and there's no >built-in behavior that will add or remove columns like it does for rows. > >If your colors have a name, you could (programmatically) create a column >for each existing column name, using the name as the column identifier, >which should ease the problem of matching columns to colors. You'll also >need a way of deciding what order to show the columns in. Then you can >use something like KVO to watch for changes in the set of colors, and >make corresponding adjustments to the table. Thanks for this advice. I need to extend this question a bit. Let's say my data model has two entities, House and Color. A house has one or more colors. Entities for my data model: House: Attributes: name; Relationships: colors (to-many). Color: Attributes: name; Relationships: house. At the moment, both relationships are marked as Optional, but I think I need to change that so that neither are Optional because a house always has at least one color. When adding additional colors, I understand that the following code can create a color object, but I'm not sure where to put this code or if I can use bindings instead. NSManagedObject *color = [NSEntityDescription insertNewObjectForEntityForName:@"Color" inManagedObjectContext:self.managedObjectContext]; [color setValue:@"Dark Blue" forKey:@"name"]; Essentially, I want each "color" object to be a bindable custom view. Ideally, this custom view would be a NSTableCellView subclass. My table would always have a single row, so I misspoke when I described that as a column. I'm not sure how I create and remove this view when creating and removing color objects. I think that Tim Isted's "A Bindable Custom NSView Subclass" blog post is close to what I'm looking for, but I haven't completely digested the article. http://www.timisted.net/blog/archive/a-bindable-custom-nsview-subclass/ Thanks for any tips or advice people have. Chuck _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
