I am trying to understand how NSOutlineView and NSTreeController can be used in
conjunction (with bindings). In most examples the NSTreeController's "Content
Array" binding is pointed to a mutable array that has a specific format (like
below).
[theList addObject:[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber
numberWithBool:YES], @"isGroup",
@"Department",
@"name",
[NSArray
arrayWithObjects:
[NSDictionary dictionaryWithObjectsAndKeys:
@"Science", @"name",
nil],
[NSDictionary dictionaryWithObjectsAndKeys:
@"Art", @"name",
nil],
[NSDictionary dictionaryWithObjectsAndKeys:
@"History", @"name",
nil],
nil],
@"children",
nil]];
There are the following additional bindings that are done:
NSOutlineView bindings -
1. "Content" bound to NSTreeController's "arrangedObjects"
2. "Selection Index Paths: to NSTreeController's "selectionIndexPaths"
NSTableColumn bindings:
3. "Value" is bound to arrangedObjects.name
I have read the class reference for NSTreeController and NSOutlineView but I
still dont understand how the above works. Foe example, how does the
NSOutlineView know which values are leaves?
NSOutlineView class ref document describes how to implement the data source if
using conventional data sources. How does it work with bindings?
The above "special" format for the contents array is not discussed any where.
Please point me in the right direction.
Thanks
Hrishi
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