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SVG Map - Resizing circles onzoom and providing a hovering legend.

Posted on 2004-08-03
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Last Modified: 2012-06-21
Here is a demo of the svg my program is producing: http://www.dcs.ex.ac.uk/ug/cs02/djm/demoMap.svgz

I would like the spots to become smaller when a user zooms in (aswell as bigger again when someone zooms out). Clearly the circles will therefore need to be in a group.

I would also like to provide a hovering legend in the top left of the screen whoes size and position is not affected by the user scaling or panning/scrolling. Idealy this window would be moveable by the user.

Thanks for your help,
Dan.
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Question by:Dandalf
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by:Dandalf
ID: 11714078
First bit solved and looks like this:

         var svgdoc,svgroot;
       function doZoom(evt){
             var spots = svgroot.getElementById('spots')
             var nodes = spots.childNodes;
             for(var i=0; i<nodes.length; i++){
                   if(nodes.item(i).nodeType == 1){
                         nodes.item(i).setAttribute('r', 3/svgroot.currentScale);
                   }
             }
      }

Still looking to get a floating legend working however.

Dan.
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