value for translate.
 
 mxEvent.UP and mxEvent.DOWN fire if the current root is changed by executing
 a mxCurrentRootChange. The event name depends on the location of the root in
 the cell hierarchy with respect to the current root. The <code>root</code>
 and <code>previous</code> properties contain the new and previous root,
 respectively.</div>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<section role="region">
<ul 