Re: Re: Touch screens and wxPython

From: Gene Mosher <gene_at_viewtouch_dot_com>
Date: Tue Dec 02 2003 - 19:57:53 CST

Karl Auerbach wrote:

>Wow, I hadn't thought I'd trigger such a long thread. ;-)
>As for the size of the buttons, wxPython does allow the user to define
>button shapes and sizes - so they can be super-sized and of whatever color
>and pattern we want.
It's important to allow the local voting officials to configure & define
the GUI, without anyone having to learn wxPython. Fortunately, this
system exists and is what I'm building a demo on. It will be available
very soon.

> Big buttons do, however, mean that a full ballot
>full of contests won't fit onto the screen at one time.
The GUI is not really the voting mechanism but, rather, the mechanism
which helps and enables the voter to 'build' a ballot. Whatever is on
the display at any given time should be only what is relevant to
enabling the voter to making the next selection in the ballot building

>How does the diebold and other systems deal with navigation through a
>ballot that occupies several screens?
I wouldn't know that but it also doesn't matter to me how they or anyone
else deals with it because I have been at it a lot longer than anybody
at Diebold has. I think that the demo I'm building will give us all
something real to push against and move us from discussions of
touchscreen gui theory into the realm of prototype and user feedback.
I, for one, would rather just be building the gui and refining it
according to feedback that just talking about it.

>As for touch screen wipe-downs and styli: I'm concerned that someone will
>pull out a ballpoint pen and punch a hole in the thing if it is covered
>with a film rather than a solid and somewhat inpenetrable layer of plastic
>or glass.
> --karl--
Vandalism is an administrative issue for the voting officials to
manage. If somebody damages the voting equipment then they will
certainly not be able to do it anonymously. They will be immediately
discovered as soon as the next voter enters the booth. If vandalism of
this nature does happen then a backup display can be inserted into the
place of the damaged display quickly, just as would be done if it had
failed. LCDs are pretty reliable, however.

Touchscreen sensors typically make the display surface more robust, not
more fragile. The thin layer of indium tin oxide which is used on
capacitance touchscreens increases the hardness of the glass to 7 on the
mohs scale. That's pretty good; it's equal to the hardness of quartz.
The touchscreen sensor manufacturers are the ones who can tell us
exactly what the deal is on such issues as this, however, and it varies
according to whether the technology is resistive, surface acoustic wave,
capacitance or something else that may replace these in the future.

Gene Mosher
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Received on Wed Dec 31 23:17:02 2003

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