On Jan 31, 2005, at 3:38 PM, Edwards, Waverly wrote:
I'm currently looking at migrating from Quickdraw to CoreGraphics.
I've been reading Quartz 2D References today and I'm not too clear on
current limitations of CG.
My app will be drawing thousands of polygons and lines, circles,
squares, etc (but mostly polygons) to represent a map (roads, bodies
of water, interstates, cities, states etc)
I am not finding any API's for polygon drawing
A way to test what polygon my mouse is currently over.
A way to test if an object is within a particular region ( a free hand
lasso or rectangle)
CG Paths don't really seem to be as effective as regions as I'm
understanding them.
As it stands now, it does not look like a good idea to even try using
CG as all the functionality associated with QD does not exist within
CG.
Am I overlooking something or should I wait to see what will be added
to CG in future OS releases?
One of the big differences in Quartz is there is no XOR rasterop type
functionality. So if you currently do any interactive graphics by
using the complement mode that XOR provides you will have to rewrite
that functionality in Quartz. In Quartz you can use overlay windows to
create a similar functionality. In the end I believe using the overlay
window of Quartz will provide a nicer looking UI experience than XOR
but the move may be painful.
Because of the above issue we have yet to make the jump from Quickdraw
to Quartz, though we do support Quartz for printing. I'm not sure that
Scott or Bryan mentioned that Quickdraw is deprecated meaning Apple is
no longer doing anything to the Quickdraw code. So the question is not
IF you will have to move to Quartz as much as WHEN. For us it's now
figuring out when I've got a month or two to make the transition.
As Bryan and Scott already mentioned most of what you are looking for
does exist in CG or has a way to implement via code.
Mike
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