macOS window which has left pane like finder

[McBgnr]

How to go about making a window which has a left pane like finder. A number of items appear on the left pane in Finder window and each of these when selected show contents of the directory on the right pane.

How to make such a left/right pane type of window.

 

[skunkworker]

Have 2 NSViews. When someone clicks on the left, update the right

 

[McBgnr]

So the NSView on the left will have buttons for individual items ? or a TreeView can be used for that?

 

[Sydde]

I believe Finder uses a specific AppKit object: investigate NSRuleEditor.

 

[Krevnik]

NSOutlineView with some tweaks in the delegate and data source is used for the "Source List" pane. I've done some work with them, and it's actually not terrible (although not great) to pull it off in 10.5 or 10.6. 10.4 and earlier is a royal pain to handle though.

NSRuleEditor is more for editing predicates like you would for a smart search folder, a smart playlist, and so on.