Re: Scrollers on custom view appearing but not disappearing

FROM : Quincey Morris
DATE : Sat Mar 01 01:46:34 2008

On Feb 29, 2008, at 16:00, Steve Weller wrote:

> - (void) setFrameSize:(NSSize)newSize
> {
>     NSSize cSize;
>     cSize = [self canvasSize];  // Provides a size
>
>     // Use the larger dimensions of the two rects
>     if(newSize.width > cSize.width)
>         cSize.width = newSize.width;
>     if(newSize.height > cSize.height)
>         cSize.height = newSize.height;
>     
>        [super setFrameSize:cSize];
> }
>
> And this works as long as the window is only made smaller. If the 
> window is made larger then the scrollers do not disappear.
>
> Is my approach the right one for what I am trying to achieve?


Probably not. There are various ways the view frame can change, and 
they don't all funnel through the setFrameSize method.

If you register to receive NSViewFrameDidChangeNotification's for your 
view (remembering to call setPostsFrameChangedNotifications: YES), it 
might work to do something like this in the notification method:

   [[NSNotificationCenter defaultCenter] removeObserver: self];
   NSRect frame = [self frame];
   // calculate new frame
   [self setFrame: frame];
   [[NSNotificationCenter defaultCenter] addObserver: self ...