The NSTextField has a superview and a frame. It is fully visible and has the following declaration:

- (id) initWithFrame: (NSRect) frameRect {
    if ((self = [super initWithFrame: NSMakeRect(0, 0, 300, 20)])) {
        label = [[NSTextField alloc] initWithFrame: NSMakeRect(47, 1, 233, 18)];

        [[label cell] setAllowsUndo: NO];
        [[label cell] setLineBreakMode: NSLineBreakByTruncatingMiddle];
        [[label cell] setScrollable: NO];
        [label setBezeled: NO];
        [label setBordered: NO];
        [label setDrawsBackground: NO];
        [label setEditable: NO];
        [label setFont: [NSFont menuFontOfSize: 14.0f]];
        [label setSelectable: NO];
        [label setTextColor: [NSColor textColor]];

        [self addSubview: label];

        NSLog(@"%@", NSStringFromRect([label visibleRect]));
    }

    return self;
}