t you get with network.getScale(). When fired by clicking the zoom in or zoom out navigation buttons, the pointer property of the object passed will be null.  Passes an object with properties structured as:
<pre class="prettyprint lang-js">{
  direction: '+'/'-',
  scale: Number,
  pointer: {x:pointer_x, y:pointer_y}
}
</pre></td>
            </tr>
            <tr><td id="event_showPopup">showPopup</td>
                <td><code>id of item corresponding to popup</code></td>
                <td>Fired when th