Advanced User Interface Controls and Components
Occurs before an item is removed from the tree collection.
| Param | Type | Details |
|---|---|---|
| e | Object | An event object which contains the item |
This event can be handled by binding the 'itemremoved' event to the Menu widget object.
Supported in: v1.0.
An example explaining how to create a handle to the itemremoving event in Menu widget.
By handling this event you can prevent removing of items depending on some custom conditions. By returning a false value, you can cancel this event. Whenever the 'Remove Item' button is clicked the currently selected item will be removed from the Menu, until only one root item remains.
$(document).ready(function() {
// Create an instance of Menu widget
var $bar = $('#menu').menu();
// Get the item that is currently selected in Menu
var getCurrentSelection = function(){
return $bar.menu("option", "selectedItem");
}
// When 'Remove Item' button is clicked, it removes the currently selected item from the Menu
var remove = function(){
$bar.menu("removeItem", getCurrentSelection());
}
// Create a handler to the itemremoving event
$tree.on({
"itemremoving": function(e){
var itemCount = $bar.menu("getList").length;
if (itemCount <= 1)
return false;
});
});
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="css/integralui.menu.css" />
<link rel="stylesheet" href="css/themes/theme-blue.css" />
<script type="text/javascript" src="external/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="external/jquery.ui.core.min.js"></script>
<script type="text/javascript" src="external/jquery.ui.widget.min.js"></script>
<script type="text/javascript" src="js/jquery.integralui.widget.min.js"></script>
<script type="text/javascript" src="js/jquery.integralui.menu.min.js"></script>
</head>
<body>
<button type="button" onclick="remove()" />Clear</button>
<div id="menu" class="widget">
<ul>
<li><span>MenuItem1</span></li>
<li><span>MenuItem2</span>
<ul>
<li><span>MenuItem21</span></li>
<li>><span>MenuItem22</span></li>
<li ><span>MenuItem23</span></li>
<ul>
<li><span>MenuItem231</span></li>
<li ><span>MenuItem232</span>
<ul>
<li><span>MenuItem2321</span></li>
<li><span>MenuItem2322</span></li>
</ul>
</li>
<li><span>MenuItem233</span></li>
</ul>
</li>
<li><span>MenuItem24</span></li>
</ul>
</li>
<li ><span>MenuItem3</span></li>
<ul>
<li><span>MenuItem31</span></li>
<li><span>MenuItem32</span></li>
<li><span>MenuItem33</span></li>
</ul>
</li>
</ul>
</div>
</body>
</html>
.widget
{
width: 600px;
height: 0;
}
A sample which demonstrates how you can create and/or modify a tree hierarchy using several different methods.