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<div class="apiDetail">
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<h2><span>Function(event, treeId, treeNode)</span><span class="path">setting.callback.</span>onMouseDown</h2>
<h3>Overview<span class="h3_info">[ depends on <span class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
<div class="desc">
<p></p>
<div class="longdesc">
<p>Used to capture the event when mouse down.</p>
<p class="highlight_red">If you set 'setting.callback.beforeMouseDown',and return false, zTree will not trigger the 'onMouseDown' callback.</p>
<p>Default: null</p>
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<h3>Function Parameter Descriptions</h3>
<div class="desc">
<h4><b>event</b><span>js event Object</span></h4>
<p>event Object</p>
<h4 class="topLine"><b>treeId</b><span>String</span></h4>
<p>zTree unique identifier: <b class="highlight_red">treeId</b>, easy for users to control.</p>
<h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>
<p>JSON data object of the node which mouse over</p>
<p class="highlight_red">If the DOM which mouse over isn't a node, it will return null.</p>
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<h3>Examples of setting & function</h3>
<h4>1. When mouse down, alert info about 'tId' and 'name'.</h4>
<pre xmlns=""><code>function zTreeOnMouseDown(event, treeId, treeNode) {
alert(treeNode ? treeNode.tId + ", " + treeNode.name : "isRoot");
};
var setting = {
callback: {
onMouseDown: zTreeOnMouseDown
}
};
......</code></pre>
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