Hi Chris. You could try alternating between two image with strings.
In this case you should be able to determine the length of each one
and string them together. Now if either is shorter than the screen
length you may have to generalize this to an n-buffering method or
pool. You could do something like this using an iterator if you are
feeling adventurous.
As for the text aliasing and jittering these are different issue and
you'll have to give more information and or examples which illustrate
the problems b/c i don't see them in the composition you provided.
In the future it would be helpful if you made your compositions which
you provide to the list for help a little more digestible by using
macros to encapsulate your functionality.
.xX
Future reference, you should make your composition a little easier to
digest by using macros.
On May 25, 2006, at 1:49 PM, ChrisB wrote:
I have uploaded a scrolling news ticker that I need some help with.
This works, though it is a serious hack. Two main problems. First,
since I can't seem to make the length of the story determine the
speed of the scrolling (it creates some loop that QC won't allow me
to do), I had to truncate every story to a fixed width. This also
means that I am not able to string stories end to end for a
continuous scrolling ticker. It has to break between each.
The other problem is dialing the font size and image width in for a
crisp font when this is displayed at the bottom of a full screen
nib. The text becomes aliased and look bad. It also jitters as it
scrolls rather than being a smooth travel across the screen.
The content will eventually pull from internal rss feeds, but right
now, the quality and functionality of this QC piece is just not there.
Has anyone else made a ticker in QC? My other option may be to just
ditch QC, and write this all in Cocoa/Quartz, but I am far from
knowing what I need in order to pull that off. I really need some
help with this, or some guidance on where to locate one already
made. This is a key part of a tool we are trying to put together
for the school. Back to my Programming with Quartz book to see if
there is another way outside of QC.
Thanks,
Chris
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