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I ran into a very strange problem:

I have an NSOutlineView set to NSTableViewSelectionHighlightStyleSourceList. Under certain conditions, the second level is not indented and shown at the same level as the root node.

I believe that is, because the first level is expected to be a "group" level. However, on 10.8 everything is indented properly by default. I only caught this while testing on 10.7. Looks like this behavior changed across releases.

Second level is not indented if:

  • on Mac OS X 10.7 Lion (always same behavior)
  • OR on 10.8 only if I implement - (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item to return NO

How can I get each level to be indented as one would expect for a hierarchal layout and keep the source list style?

Unexpected indentation:

unexpected indentation

Mark
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1 Answers1

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It seems that the indentation only starts on the 3rd level. So, to get around this, you need to add a node that wraps all your current root nodes. That root node will be styled much like the default OSX group node:

enter image description here

Not ideal, depending on your UI, but better than using the regular NSOutlineView styling.

If you don't want to show the root header, you could use outlineView:heightOfRowByItem: to set the height to 0.

rdougan
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