[IxDA Discuss] select exact number widget?

[Michael Tuminello]

it's also a bit awkward to force multiple selection with only a  
single clicking device.  one could imagine a touchscreen using a  
chording version of the radio buttons, where you can actually touch  
multiple selections at once to make a selection...

for now I would think checkboxes with some kind of progressive  
feedback (1 of 3 selected, 2 of 3 selected, etc) would be easy enough  
to use and probably more space efficient and easier to use than some  
sort of drag and drop custom widget.

Michael

On Jan 5, 2007, at 4:37 PM, Jeff Howard wrote:

> Hi Victor,
>
> Two things come to mind.
>
> In Tog on Interface, Bruce Tognazzini wrote about the development of
> an idiom in-between checkboxes and radio buttons. Essentially an "at
> least one but perhaps more than one" set of checkboxes. When you
> deselected the last checkbox, it bumped the selection over to the
> next checkbox. This works well for enforcing a minimum number, but
> doesn't seem quite as good for restricting the maximum (though the
> shifting idea could work there too).
>
> What might be a better mapping in this case is something like what
> John Schrag mentions. Think of how the Illustrator gradient palette
> works. You need to select two colors, one for either end of the
> gradient. The palette begins with an arrow on either end of a
> continuum of colors. Those arrows always point to exactly two colors
> (forget for a moment that you can add more arrows) and you can drag
> either or both arrows to different values. In your example, imagine
> the apples are in a row. Two arrows are beneath the apples. You
> simply slide the two arrows left or right to point to the two apples
> you want and enforce exclusive selection. Two apples would be
> selected by default at the beginning, or there could be an empty
> space to "park" the arrows.
>
> // jeff
> ________________________________________________________________
> Welcome to the Interaction Design Association (IxDA)!
> To post to this list ....... discuss at ixda.org
> List Guidelines ............ http://listguide.ixda.org/
> List Help .................. http://listhelp.ixda.org/
> (Un)Subscription Options ... http://subscription-options.ixda.org/
> Announcements List ......... http://subscribe-announce.ixda.org/
> Questions .................. lists at ixda.org
> Home ....................... http://ixda.org/
> Resource Library ........... http://resources.ixda.org