[Sugar-devel] flickering mouse in an activity on an xo

[Erik Blankinship]

On Sun, Aug 29, 2010 at 1:51 PM, Gary Martin <garycmartin at googlemail.com>wrote:

> Hi Erik,
>
> On 29 Aug 2010, at 18:17, Erik Blankinship wrote:
>
> >
> > FWIW, the cursor flickers just like that in pygame based activities.
> Physics is pygame based, and the flicker was pretty annoying as the cursor
> is a key part of the UI, pygame also didn't pickup the Sugar cursor default
> shape — so I cheated, I switch off the cursor, and place a pygame sprite in
> the same place. No flicker, correct looking cursor. Total hack of course
> (though code in the end was easy/minimal).
> >
> > Just a handful of lines in physics.py, most of which there to hide the
> fake pygame canvas cursor when the cursor moves into the toolbar area:
> >
> >
> http://git.sugarlabs.org/projects/physics/repos/mainline/blobs/master/physics.py
> >
> > Interesting...  thanks for sharing the workaround.  That should work for
> the hamster library too.  When I get a chance to try it out, I will report
> back to this thread.
> >
> > Is there somewhere to get the sugar cursor graphics within sugar itself?
>  I see that physics imports its own local copy:
> >
> http://git.sugarlabs.org/projects/physics/repos/mainline/blobs/master/standardcursor.png
>
> You can find the original git rep that I made standardcursor.png out of at:
>
>
> http://git.sugarlabs.org/projects/sugar-artwork/repos/mainline/trees/master/cursor/sugar
>
> But you'll note that the png's (a sequence of 12 animation states, and one
> hotspot file), requires a slice and dice to get an individual cursor out.
>
> These png images, to the best of my knowledge, do not end up in an actual
> build – the build scripts do some funky things with these and output a
> rather curious format (Xcursor I think), that seem to live in:
>
>        /usr/share/icons/sugar/cursors
>
> Sure it all makes perfect sense for an X windows developer – there's
> probably some X library somewhere for reading them in and converting to
> other image representations.
>
>
This has been very helpful.  Thank you.

It seems that there are two action items:
One: where in trac do I upvote preventing mouse pointers from flickering in
pygame / hamster?
Two: can someone update the sugar almanac with examples so that python
developers access the cursor graphics?
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