NSTableView example that treats TAB & ENTER keystroke as special command

gistfile1.txt

//Subclass NSTableView and override the textDidEndEditing method. Then change the custom class of NSTableView instance in IB to the subclass.
- (void) textDidEndEditing: (NSNotification *) notification
{
  NSInteger editedColumn = [self editedColumn];
  NSInteger editedRow = [self editedRow];
  NSInteger lastRow = [self numberOfRows];
  NSInteger lastCol = [self numberOfColumns];
  NSDictionary *userInfo = [notification userInfo];
  int textMovement = [(NSNumber *)[userInfo valueForKey:@"NSTextMovement"] intValue];
  [super textDidEndEditing: notification];
  
  if (textMovement == NSTabTextMovement)
  {
    if (editedColumn != lastCol - 1 )
    {
      [self selectRowIndexes:[NSIndexSet indexSetWithIndex:editedRow] byExtendingSelection:NO];
      [self editColumn: editedColumn+1 row: editedRow withEvent: nil select: YES];
    }
    else
    {
      if (editedRow !=lastRow-1)
      {
        [self editColumn:0 row:editedRow + 1 withEvent:nil select:YES];
      }
      else
      {
        [self editColumn:0 row:0 withEvent:nil select:YES]; // Go to the first cell
      }
    }
  }
  else if (textMovement == NSReturnTextMovement)
  {
    if(editedRow !=lastRow-1)
    {
      [self selectRowIndexes:[NSIndexSet indexSetWithIndex:editedRow+1] byExtendingSelection:NO];
      [self editColumn: editedColumn row: editedRow+1 withEvent: nil select: YES];
    }
    else
    {
      if (editedColumn !=lastCol - 1)
      {
        [self editColumn:editedColumn+1 row:0 withEvent:nil select:YES];
      }
      else
      {
        [self editColumn:0 row:0 withEvent:nil select:YES]; //Go to the first cell
      }
    }
  }
}