[ka-Map-users] Technical alternatives for SVG on IE
rst at alum.mit.edu
Fri Apr 28 16:47:46 EDT 2006
Paul Spencer writes:
> > Robert Thau wrote:
> > I tried playing with <canvas> in Firefox. Works fine if you're just
> > drawing an essentially static overlay. The only way I could think of
> > to get mouse sensitivity, though, was to overlay a transparent image
> > with an <imagemap>, and add <area> tags for the mouse sensitive areas.
> > It works, but for large numbers of overlays it can be slow. On the
> > other hand, I'm not sure what else you *can* do to display
> > mouse-sensitive polygonal areas in Safari...
> If you are rendering the svg overlay on the server side anyway then a
> round-trip to the server via ajax would get you a tooltip quite
> quickly and with minimal browser impact. Just a thought.
run, in response to a mouse event, to kick off the XMLHttpRequest.
The reason for the imagemap hackery I described was to make that
happen if you were rendering graphics on a <canvas>. If you're
using SVG, there's no point at all --- you can put mouse handlers
on the SVG objects directly.
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