NSOutlineView hiding a column while editing a row in another column

I have a NSOutlineView which I want to make several columns hidden in response to a user action. I have set up the outlineColumn to resize with table and the rest have fixed size, so that when one or more columns are hidden, the outlineColumn widens accordingly. In normal conditions

NSOutlineView hiding a column while editing a row in another column

I have a NSOutlineView which I want to make several columns hidden in response to a user action. I have set up the outlineColumn to resize with table and the rest have fixed size, so that when one or more columns are hidden, the outlineColumn widens accordingly. In normal conditions