[sugar] PenTablet user interface
Mon Apr 7 16:24:45 EDT 2008
Great! I think the best thing to do right now is for me to release
what I have. Can you (or anybody else) suggest the best place to put
Here's what I have:
- a GTK widget for the 1-to-1 case. This is eventually destined for
sugar.graphics, I think.
- an activity that demonstrates the proposed interfaces for the
unconstrained drawing task (e.g. Paint)
- (soon) a GTK container widget for the unconstrained drawing task.
However, the actual behaviour of this widget is still to be
Would it make sense to create a branch in the sugar-toolkit repository
for the GTK widgets? For the activity, I could either host that on my
own svn server, or put it into an OLPC repository.
http://dubroy.com/blog - on programming, usability, and hci
On Mon, Apr 7, 2008 at 4:10 PM, Eben Eliason <eben.eliason at gmail.com> wrote:
> Hi Pat -
> I think that the technical solutions you've identified sound quite
> good, and make some nice improvements on my initial behavioral sketch
> as written up for the Paint activity. I'd definitely be interested in
> seeing any technical demos you have working, and also would like the
> chance to work with you on some graphical aspects of the widget and/or
> the experience (and hance, the API) for more complex use cases.
> - Eben
> On Mon, Apr 7, 2008 at 3:27 PM, Patrick Dubroy <pdubroy at gmail.com> wrote:
> > (This was posted to olpc-devel a few weeks ago, but I just realized
> > that it belongs more on this list)
> > Hi,
> > I'm working on a project to improve the PenTablet support. I have two
> > main goals:
> > 1. Build a GTK widget that an application developer could use to get
> > tablet support "for free". The widget would provide a 1-to-1 mapping
> > between the physical tablet and the on-screen drawing area. For
> > example, a penmanship application might have an area on-screen where a
> > child could practice their writing.
> > 2. For the more complicated case of freehand drawing in e.g. the Paint
> > activity, my goal is to define the interface through which the user
> > will be able to draw on an arbitrary area of the canvas.
> > Of course, this is all pending proper driver support for the
> > PenTablet. For now, I am prototyping these applications by reading
> > directly from /dev/input/event5.
> > I know that this has been discussed previously on the mailing list,
> > but to my knowledge there's been no agreement on exactly how the UI
> > will work for the PenTablet. I've created a page in the wiki
> > (http://wiki.laptop.org/go/PenTablet_UI) that summarizes the previous
> > suggestions that I am aware of. If you have any opinions on this,
> > please take a look at let me know what you think.
> > My personal feeling is that the best option is this:
> > - the tablet is always mapped to a rectangle in the center of the
> > screen. Using the grab button and the stylus, the canvas can be moved
> > around underneath the rectangle (Option 1 for Adjusting the Mapping)
> > - to allow for precise drawing, the user can engage a "hover mode" by
> > holding down the Alt key while dragging the stylus (Option B for
> > Precise Drawing)
> > I have an application which demonstrates some of these techniques,
> > which I could make available to anyone who is interested. I am also
> > planning on doing a small, informal user study to test some of the
> > techniques.
> > Pat
> > --
> > Patrick Dubroy
> > http://dubroy.com/blog - on programming, usability, and hci
> > _______________________________________________
> > Sugar mailing list
> > Sugar at lists.laptop.org
> > http://lists.laptop.org/listinfo/sugar
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