On Jul 23, 2008, at 10:43, Rick Mann wrote:
What attribute of the contained views does NSScrollView (or the NSScroller, whatever) use to determine what the scroll bars look like? I read the doc a couple times, but I couldn't quite figure it out. Is it the bounds.size of my contained view? What if I'm setting a CoreGraphics CTM to zoom in on my drawing (my drawing code is all done using the CoreGraphics API)...I would want the extent of the scrollable area to grow accordingly...what attribute do I change?
The scroll bars depend on the ratio of the clip view bounds size (i.e. self.enclosingScrollView.contentView.bounds.size) to your view's frame (i.e. self.frame.size). So, if you zoom in to 200%, you should double your view's frame size to get the scrollbars to do the right thing. Depending on how you go about drawing the view's scaled contents, you may or may not want to change the view bounds.
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