Build jQuery UI Draggable - Events in JavaScript

Description

The following code shows how to build jQuery UI Draggable - Events.

Example


<!-- Revised from demo code on http://jqueryui.com/ -->
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Draggable - Events</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css" rel="stylesheet" />
<!--from  www  . j  a  va  2 s  . co  m-->
<style>
#draggable { width: 16em; padding: 0 1em; }
#draggable ul li { margin: 1em 0; padding: 0.5em 0; } * html #draggable ul li { height: 1%; }
#draggable ul li span.ui-icon { float: left; }
#draggable ul li span.count { font-weight: bold; }
</style>
<script>
$(function() {
var $start_counter = $( "#event-start" ),
$drag_counter = $( "#event-drag" ),
$stop_counter = $( "#event-stop" ),
counts = [ 0, 0, 0 ];

$( "#draggable" ).draggable({
start: function() {
counts[ 0 ]++;
updateCounterStatus( $start_counter, counts[ 0 ] );
},
drag: function() {
counts[ 1 ]++;
updateCounterStatus( $drag_counter, counts[ 1 ] );
},
stop: function() {
counts[ 2 ]++;
updateCounterStatus( $stop_counter, counts[ 2 ] );
}
});

function updateCounterStatus( $event_counter, new_count ) {
// first update the status visually...
if ( !$event_counter.hasClass( "ui-state-hover" ) ) {
$event_counter.addClass( "ui-state-hover" )
.siblings().removeClass( "ui-state-hover" );
}
// ...then update the numbers
$( "span.count", $event_counter ).text( new_count );
}
});
</script>
</head>
<body>

<div id="draggable" class="ui-widget ui-widget-content">

<p>Drag me to trigger the chain of events.</p>

<ul class="ui-helper-reset">
<li id="event-start" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-play"></span>"start" invoked <span class="count">0</span>x</li>
<li id="event-drag" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-arrow-4"></span>"drag" invoked <span class="count">0</span>x</li>
<li id="event-stop" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-stop"></span>"stop" invoked <span class="count">0</span>x</li>
</ul>
</div>

<div class="demo-description">
<p>Layer functionality onto the draggable using the <code>start</code>, <code>drag</code>, and <code>stop</code> events.  Start is fired at the start of the drag; drag during the drag; and stop when dragging stops.</p>
</div>
</body>
</html>

Click to view the demo

The code above generates the following result.

Build jQuery UI Draggable - Events in JavaScript

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