Mega Code Archive
With MooTools it is easy to define often used actions as custom events for elements
<![CDATA[
<!--
MooTools is released under the Open Source MIT license,
which gives you the possibility to use it and modify
it in every circumstance.
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style rel="stylesheet" type="text/css">
div.floated {
width: 400px;
float: left;
margin-left: 1em;
}
input#myElement, div#myScrollElement {
border: 1px solid black;
background-color: #f9f9f9;
float: left;
margin: 5px;
padding: 3px;
width: 134px;
}
div#myDivElement {
clear: left;
width: 150px;
}
div#myScrollElement {
width: 200px;
height: 200px;
overflow: auto;
float: left;
background-color: #e8a3a3;
}
div#myScrollElement div {
height: 500px;
}
div#myOtherDivElement {
margin-top: 10px;
font-weight: bold;
float: left;
}
</style>
<script type="text/javascript" src="mootools.js"></script>
<script type="text/javascript">
// We define a custom event called "keyenter" which is based on the keyup event
Element.Events.keyenter = {
base: 'keyup',
condition: function(e){
// We can basically put any logic here.
// In this example we return true, when the pressed key is the
// Enter-Button so the keyenter event gets fired.
return e.key=='enter';
}
};
window.addEvent('domready', function(){
// First Example
// Here we add the custom event to the input-element
$('myElement').addEvent('keyenter', function(e){
// We can do everything here: submitting a form, sending an AJAX-Request and so on
// because it only fires when the user presses the Enter-Button
e.stop();
// But instead we only change the text of an element.
$('myDivElement').set('text', 'You pressed enter').highlight();
});
// Second Example
var el = $('myScrollElement'),
color = new Color(el.getStyle('background-color')).hsb;
el.addEvent('mousewheel', function(e){
e.stop(); // prevent the mousewheel from scrolling the page.
// Again we just set the text of an element and highlight it
$('myOtherDivElement').set('text', 'Wheel ' + (e.wheel < 0 ? 'down' : 'up')).highlight();
// But we add some nice logic to it to change the background-color
var hue = color[0];
if (e.wheel < 0){
hue -= 5;
if(hue < 0) hue = 360;
} else {
hue += 5;
if (hue > 360) hue = 0;
}
color[0] = hue;
this.setStyle('background-color', color.hsbToRgb());
});
});
</script>
<title>Slider Demo</title>
</head>
<body>
<h1>Custom Events</h1>
<h2>Introduction</h2>
<p>
With MooTools it is easy to define often used actions as custom events for elements.
This is especially useful for input-elements. This demo shows you how to define
a custom event, that only fires when you press the Enter-Button inside the given element.
</p>
<input type="text" id="myElement" name="myElement" value="Press enter here" />
<div class="help floated">
<strong>Why?</strong> Custom events are really useful when the standard
events are just not enough. See the Mouseenter-Demo for a more advanced
example.
</div>
<div id="myDivElement"></div>
<h2>Mousewheel-Event</h2>
<p>
The mousewheel event is a custom MooTools-Event, which allows you to use the
scrollwheel as an event, because every browser handles it differently. Try to
use your mousewheel over the element below.
</p>
<div id="myScrollElement"><div></div></div>
<div id="myOtherDivElement"></div>
</body>
</html>
]]>