Why is my header selectable and the cell not editable

Question

I have two questions related to NSOutlineView:

1. Why is my Header selectable even though I tell it that it is a Group (otherwise it would not have the "Hide" on the right:

   

   // I am telling the view that the given item is a group by implementing
   -(BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item;
   

2. I am using a view-based outline and so I can't press Enter or click on a leaf to edit it. Is there a simple way (with the default view-based setup so achieve this functionality).

   Please note that I tried to achieve this by binding to editable on the given column. But the method is never called.

Answer 1

At least I was able to answer the first part of my own question.

I had to implement the method like so in order to make the header unselectable:

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item{
    // Add your own logic here to determine whether a cell should be selectable 
    return ![self isHeader:item];
}

I have created a little sample project that does the following.

• Display a list of items
• Edit the items in a master-detail fashion
• Remove and add items
• Usage of bindings

Check out besi/mac-quickies on github. Most of the stuff is either done in IB or can be found in the AppDelegate