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outlineView(_:isGroupItem:)

Returns a Boolean that indicates whether a given row should be drawn in the “group row” style.

Declaration

@MainActor optional func outlineView(_ outlineView: NSOutlineView, isGroupItem item: Any) -> Bool

Parameters

  • outlineView:

    The outline view that sent the message.

  • item:

    An item in the outline view.

Return Value

true to indicate a particular row should have the “group row” style drawn for that row, otherwise false.

Discussion

If the cell in that row is an instance of NSTextFieldCell and contains only a string value, the “group row” style attributes are automatically applied for that cell.