On Jul 17, 2008, at 7:50 PM, Mike Rossetti wrote:
Before I spend a lot of time attempting the following I would
appreciate any advice based on your experience:
I've got a drawing-like application where I'd like the user to be
able to rotate individual elements of the drawing. When the mouse
is hovering over an element I draw a manipulation image (a CALayer)
and what I'd like to do is to let the user mouse click in a little
rotator control nubby and drag to rotate.
I'm considering using a QCCompositionLayer and pulling in a nice
Quartz Composition I put together that behaves (at least in Quartz
Composer) as I'd like.
Is this a foolish or a wise direction to take?
There is nothing built in to do this, so you'd have to figure out some
way to express your render tree to the QCComposition (or at least part
of it) so that it can output the manipulations so you can then apply
them to the layer. I don't think this will work very well honestly,
and I think it would likely be easier for you to replicate this
functionality in code (both in terms of the amount of code to support
this and the effort required to make it work correctly).
--
David Duncan
Apple DTS Animation and Printing
[EMAIL PROTECTED]
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