GGB+JS样例6 - 监听点的改变

摘要: 本文介绍基于GeoGebra和JavaScript的小程序样例 - 监听点的改变。

网页代码:


<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>监听点改变的事件</title>
</head>
<body>
<p id="xy"></p>
<div id="applet"></div>
<script src="../GeoGebra/deployggb.js"></script>
<script>
  var applet1 = new GGBApplet({filename: '2d.ggb', appletOnLoad: function() {
    ggbApplet.registerUpdateListener('pointChanged');
    pointChanged('C');
  }});
  applet1.setHTML5Codebase('../GeoGebra/HTML5/5.0/web/', true);
  window.onload = function() {
    applet1.inject('applet', 'html5');
  };
  function pointChanged(name) {
    if (ggbApplet.getObjectType(name) === 'point') {
      document.getElementById('xy').innerText = name + ': (' + ggbApplet.getXcoord(name) +
       ', ' + ggbApplet.getYcoord(name) + ')';
    }
  }
</script>
</body>
</html>

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