On Fri, Aug 22, 2008 at 3:58 PM, Paul Bruneau <[EMAIL PROTECTED]> wrote: > I feel I can nearly grasp what I need to do, but not quite. I know what I > shouldn't be doing--which is what I am doing and I feel I'm a little in the > weeds. I seek a nudge in the right direction if someone can help. > > I have a master-detail setup with a normal table displaying a list of > orders. Below it is my subclass of NSView which draws a tree diagram of the > selected order and its descendent order steps, each of which might have its > own descendants. In fact, here it is: > http://special-lite.com/satellite/Picture%204.png > > I am forcing the view to update after a change to one of the order step > objects in what I am sure is The Wrong Way™ by basically chucking > setNeedsDisplay into areas of my code such as the contextual menu handling > code, etc. This works great for GUI-driven changes even though it's wrong, > but it falls apart of course when changes occur due to Applescript. > > What I think I understand that I need is that when an object belonging to > the current selection of the table is modified, that a controller is > notified and it tells the view to update. Or perhaps I can programmatically > bind the view to the table's selection. > > I think I could maybe (maybe!) figure out how do this for the order (the > table's selection), but I am totally lost as to how I would do it for the > order's great-grandchildren order steps. > > If someone could give me a short breakdown of the idea of how to do it, I > will happily go read hours of documentation and examples to learn the > details. >
How about having the object post an NSNotification whenever it's changed? Your controller can observe the notification & call setNeedsDisplay accordingly. If you're posting a lot of notifications at the same time, you might look at coalescing them (http://developer.apple.com/documentation/Cocoa/Conceptual/Notifications/Articles/NotificationQueues.html) _______________________________________________ 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 [EMAIL PROTECTED]
