Well,
I implemented "prepareContent" method for my NSTreeController for
create the colors objects with predicate filters. And this work fine.
Now, the problem is how update data in NSOutlineView when I add a new
colored object. The first option is to call "prepareContent", but with
this,
Hello,
I am trying to make a grouped tree of my core data, to show in an
outlineview. I have been researching how to do it and the only thing I
have discovered is that inheriting NSTreeNode is useless.
I want group the root entities for his color. So, the root branches
are the colors, and
