Making 'return' Begin Editing, like Finder does

FROM : Jerry Krinock
DATE : Mon Feb 04 00:30:36 2008

I've implemented the following method in my NSTableView subclass which 
makes the 'return' key begin editing, like Finder does.  It works, but 
I don't like that hard-coded keycode 0xd for 'carriage return'.

Is there a better way to do this?  I tried to implement  -
insertNewline:, but it never gets invoked.

Thanks,

Jerry Krinock

- (void)keyDown:(NSEvent*)event {
    NSString *s = [event charactersIgnoringModifiers] ;
    unichar keyChar = 0 ;
    BOOL didDo = NO ;
    if ([s length] == 1) {
        keyChar = [s characterAtIndex:0] ;
        if (keyChar == 0xd) {
            // Unless editing is already in process, which is not the
            // case we're trying to handle here, an entire row will
            // be selected and therefore [self selectedColumn] will
            // be the "no selection" indicator, -1. So, we edit column
            // 0.  If the user wants a different column, they can
            // easily tab to it.
            [self editColumn:0
                          row:[self selectedRow]
                    withEvent:nil
                      select:YES] ;
            didDo = YES ;
        }
    }

    if (!didDo) {
        [super keyDown:event] ;
    }
}