[ka-Map-users] Mouse Wheel for Ka-Map

Wed Aug 31 11:59:06 EDT 2005

Here are some mouse wheel functions for zoom in and out if anyone is
interested.  If you use it, please send me a link to your page.

Ed

Just add on onmousewheel to your ka-map viewport div like this:

<div id="viewport" onmousewheel="wheel();">

//-----------------------------------------------------
// Put this in your <HEAD><SCRIPT> section, it includes 
// the handler and an initialization function for 
// non-ie browsers
//-----------------------------------------------------

function wheel(e)
{
  var wheelDelta;
  if (!e)
    e=window.event;
  if (e.wheelDelta)
    wheelDelta=e.wheelDelta;
  else if (e.detail)
    wheelDelta=e.detail*-1;
  if (wheelDelta>0)
	myZoomIn();
  else if (wheelDelta<0)
        myZoomOut();
}

if (window.addEventListener && navigator.product &&
navigator.product=="Gecko") {
  document.addEventListener("DOMMouseScroll",wheel,false);
//----------------------------------------------------------

---
Edward J. Cooley
Strategy Systems, Inc.
479-271-7400 - Fax: 479-271-7401
ecooley at strategysystems.com
http://www.strategysystems.com/