Hi Graham, hi Kyle!
Another thing to be aware of is that if you do it right, the ruler
views managed by the scrollview also "just work" and allow for the
view's zoom. I don't think you should be doing what you're doing to
the NSClipView.
I don't know what crossed my mind, but I used methods in my NSDocument
class to scale the clip view ... When looking into Graham's GCZoomView
I found nearly 90% of my code (although much better structured!), but
used for scaling the custom view. I think I got a better understanding
of scroll views, now:
NSDocument -> NSScrollView -> NSClipView -> Custom View
The document wires IBActions for zoom actions. The scroll view
provides rulers / scrollers (more or less) automatically and contains
a subview with the clipped content of the custom view. The scaling is
done in the custom view itself, changing its frame size, but its
internal coordinates remain unchanged.
Things have worked out well, the scrollers appear just as expected.
Tomorrow I just have to tweak a little for zooms < 1, as the custom
view should not be reduced < 100% (to show e. g. a grid), but the
drawing itself has to. So problem, I did that before by handling the
zoom factor inside -drawRect.
Thanks again a lot for your help!
Matthias
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