show/hide NSTabView

FROM : Torsten Curdt
DATE : Wed May 14 20:42:49 2008

While the code below seemed to have worked OK for showing/hiding a 
NSTextView I am now not really sure what's going on when using it on a 
NSTabView.

    - (void) showDetails:(BOOL)show animate:(BOOL)animate
    {
        NSSize fullSize = NSMakeSize(455, 302);

        NSRect windowFrame = [[self window] frame];

        if (show) {

            [tabView setFrameSize:fullSize];
            [tabView setNeedsDisplay:YES];
            windowFrame.origin.y -= fullSize.height;
            windowFrame.size.height += fullSize.height;
            [[self window] setFrame: windowFrame
                            display: YES
                            animate: animate];

        } else {
            [tabView setFrameSize:NSMakeSize(0,0)];
            [tabView setNeedsDisplay:YES];
            windowFrame.origin.y += fullSize.height;
            windowFrame.size.height -= fullSize.height;
            [[self window] setFrame: windowFrame
                            display: YES
                            animate: animate];

        }

        NSRect tabFrame = [tabView frame];

        NSLog(@"(%f,%f) (%fx%f)", tabFrame.origin.x, 
tabFrame.origin.y, tabFrame.size.width, tabFrame.size.height);
    }

While hiding works just fine ...when shown again the tabFrame height 
turns out to be 604 ...so double of what I was setting.

Now I thought that this might be related to the "autoresize subviews" 
setting in IB. But for whatever reason I cannot unset it.
I save it and when I open the NIB in IB again ...it's back checked.

What's going on?

cheers
--
Torsten