I am using an NSScrollview to scroll programatically. I have hidden the horizental and vertical scrollers but the user is still able to scroll using the mouse wheel.I want to prevent thismanual scrolling.

This is how I am doing the automatic scrolling 

```
- (IBAction)scrollToMidAnimated:(id)sender
{
    [NSAnimationContext beginGrouping];
    [[NSAnimationContext currentContext] setDuration:2.0];
    NSClipView* clipView = [self.scrollView contentView];
    NSPoint newOrigin = [clipView bounds].origin;
    newOrigin.y = [self.scrollView contentView].frame.size.height/2.0;
    [[clipView animator] setBoundsOrigin:newOrigin];
    [NSAnimationContext endGrouping];
}

```

It works perfectly but I want to prevent the user from manual scrolling(I only want to scroll programatically).Is there any way to do that?