Hi all,
Bill Dudney provides this sample app to show a CATiledLayer presenting
a large image in multiple levels of detail <http://bill.dudney.net/roller/objc/entry/catiledlayer_example
>. In his sample code, he implements a rudamentary form of scrolling
with the arrow keys.
I'd like to subclass NSClipView to allow me to scroll a sublayer of
the document view's backing layer.
The idea is to reposition the sublayer of the document view's backing
layer when the scroll bars are manipulated, just as if I where to
press an arrow key in the sample app. Furthermore, I'd like the scroll
bars to consider the size of the sublayer of the backing layer of the
document view instead of the size of the document view. This allows me
to have a sublayer that is potentially larger than it's superlayer
(the backing layer of the document view).
I've been able to reposition the sublayer when the scroll bars are
clicked by overriding NSClipView's scrollToPoint: method. However, I
can't seem to or I don't see how I can make my NSClipView subclass use
the bounds and frame of the sublayer without manipulating the document
view's frame. This problem gives situations such as the scroll bars
not accurately representing the length of the sublayer.
Has anyone ever attempted to do something like this before? Any
suggestions or ideas would be appreciated!
Thanks :-)
Kiel
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