Re: Touch screen

[Tristan Van Berkom <vantr touchtunes com>]

> What widgets in particular do not work well with a touchscreen and 

Well everything works; the only big differences are:

1. the human finger is alot less acurate than a mouse

2. a mouse gives you relational coordinates and
a touchscreen gives you coordinates of where
you "clicked". 

> in what way are they less than ideal?

In general it depends on the product but for
a few examples:

if you have a screen with alot of buttons
you want those buttons to emit "clicked" when
the're "pressed" not "released"; seeing as
fingers are big and clumsy (its hard to
touch that small area on screen as it is).

I've written my own GtkHScale/GtkVScale
kit for a mixer screen (with vol/balance/trebble....)
so that you have to touch the `knob' of the scroller
if you want to scroll. Without this; the result
is someone touching the button on top of
the volume scroller and the volume raising
a good notch (ouch!).


Regards,
                -Tristan


John K Luebs wrote:
> On Thu, Jan 16, 2003 at 05:33:18PM -0500, Tristan Van Berkom wrote:
> > 2. You're going to notice that gtk is
> > not intended for a touchscreen (I mean
> > the Gtk widget set). so you'll need
> > to write some of your own widgets.
>
> What widgets in particular do not work well with a touchscreen and in
> what way are they less than ideal?
>
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