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SVG scribble control?

From: Dave Raggett <dsr@w3.org>
Date: Tue, 3 Aug 2004 14:44:00 +0100 (BST)
To: www-forms@w3.org
Message-ID: <Pine.LNX.4.58.0408031426470.2857@holly>

Hash: SHA1

Has there been any consideration of an input control that collects
pen trace data (scribble) over an image or a graphic represented by
SVG?  For instance, a control showing a rectangular portion of a
map over which you can make a gesture with a stylus or electronic

In essence this is a kind of upload control but one which is
specialized to collecting pen gestures over an associated
presentation, which forms an integral part of the content, and
as such can't be treated as part of the styling.

Some possible designs:

 a) an XForms element with a link to the image/graphic
    where the width/height is set via CSS

 b) an XForms element acting as a container for SVG

Such controls would be valuable for composite multimodal input,
for example, where you say "zoom in here" while drawing a rough
circle on the map. When submitted, the form would contain a
representation of the command (zoom) together with the ink
trace data represented in XML, see http://www.w3.org/TR/InkML/

It would then be up to a server-side script to interpret this
data and to return the updated map.

A refinement would be a way to just update the map, avoiding
the need to reload the entire page.

- -- 
 Dave Raggett <dsr@w3.org>  W3C lead for voice and multimodal.
 http://www.w3.org/People/Raggett +44 1225 866240 (or 867351)
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Received on Tuesday, 3 August 2004 09:44:04 UTC

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