This script allows you to build a pie menu. It uses unordered lists (<ul>) to define a menu, which means that not only is it easy to configure, but it will ‘gracefully degrade’ in older browsers!
Source code for index.html
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<!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">
<head>
<title>My project</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script type="text/javascript" src="/webtoolkit.piemenu.js"></script>
<script type="text/javascript">
PieContextMenu.attach('container', 'menu1');
</script>
</head>
<body>
<ul id="menu1" class="PieContextMenu" style="display: none;">
<li><a href="#"><img src="/icon1.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon2.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon3.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon4.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon5.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon6.gif" alt="" /></a></li>
<li><a href="#"><img src="/icon7.gif" alt="" /></a></li>
</ul>
<div class="container">Cointainer1</div>
</body>
</html>
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Source code for webtoolkit.piemenu.js
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/**
*
* Javascript pie menu
* http://www.webtoolkit.info/
*
**/
var PieContextMenu = {
// private properties.
itemWidth : 34,
itemHeight : 34,
menuClassName : 'PieContextMenu',
menus : new Array,
menuElement : null,
menuElementId : null,
// private properties. Browser detect. Do not touch! :)
IE : ( document.all && document.getElementById && !window.opera ),
FF : (!document.all && document.getElementById && !window.opera),
// private method. Initialize
init : function () {
if ( PieContextMenu.FF ) {
document.addEventListener("DOMContentLoaded", PieContextMenu.domReady, false);
}
if ( PieContextMenu.IE ) {
document.write("<scr" + "ipt id=__ieinit_PieContextMenu defer=true " +
"src=//:><\/script>");
var script = document.getElementById("__ieinit_PieContextMenu");
script.onreadystatechange = function() {
if ( this.readyState != "complete" ) return;
this.parentNode.removeChild( this );
PieContextMenu.domReady();
};
script = null;
}
},
// private method. Initialize all menus.
domReady : function () {
var menus = document.body.getElementsByTagName('ul');
for(var i = 0; i < menus.length; i++) {
var className = menus[i].className.replace(/^\s+/g, "").replace(/\s+$/g, "");
var classArray = className.split(/[ ]+/g);
for (var k = 0; k < classArray.length; k++) {
if (classArray[k] == PieContextMenu.menuClassName && menus[i].id) {
PieContextMenu.initMenu(menus[i].id);
}
}
}
PieContextMenu.initEvents();
},
// private method.
initMenu : function (menuId) {
var list = document.getElementById(menuId);
list.style.position = "absolute";
list.style.margin = "0px";
list.style.padding = "0px";
list.style.listStyleType = "none";
var items = list.getElementsByTagName('li');
var images = list.getElementsByTagName('img');
for(var i=0; i<images.length; i++) {
images[i].style.border = "0px";
if (document.all && document.getElementById && !window.opera) {
images[i].style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="/icon_bg.png", sizingMethod="crop")';
} else {
images[i].style.background = "url(/icon_bg.png)";
}
}
var step = (2.0 * Math.PI) / (1.0 * (items.length));
var rotation = (90 / 180) * Math.PI;
var radius = Math.sqrt(this.itemWidth) * Math.sqrt(items.length) * 2.5;
for(var i=0; i<items.length; i++) {
var x = Math.cos(i*step - rotation) * radius - (this.itemWidth / 2);
var y = Math.sin(i*step - rotation) * radius - (this.itemHeight / 2);
items[i].style.position = "absolute";
items[i].style.display = "block";
items[i].style.fontSize = "0px";
items[i].style.left = Math.round(x) + "px";
items[i].style.top = Math.round(y) + "px";
}
},
// public method. Attaches context menus to specific class names
attach : function (classNames, menuId) {
if (typeof(classNames) == "string") {
PieContextMenu.menus[classNames] = menuId;
}
if (typeof(classNames) == "object") {
for (x = 0; x < classNames.length; x++) {
PieContextMenu.menus[classNames[x]] = menuId;
}
}
},
// public method. Sets up events
initEvents : function () {
if ( PieContextMenu.IE || PieContextMenu.FF ) {
document.oncontextmenu = PieContextMenu.show;
document.onclick = PieContextMenu.hide;
}
},
// private method. Shows context menu
show : function (e) {
PieContextMenu.hide();
var menuElementId = PieContextMenu.getMenuElementId(e);
if (menuElementId) {
var m = PieContextMenu.getMousePosition(e);
var s = PieContextMenu.getScrollPosition(e);
PieContextMenu.menuElement = document.getElementById(menuElementId);
PieContextMenu.menuElement.style.left = m.x + s.x + 'px';
PieContextMenu.menuElement.style.top = m.y + s.y + 'px';
PieContextMenu.menuElement.style.display = 'block';
return false;
}
return false;
},
// private method. Hides context menu
hide : function () {
if (PieContextMenu.menuElement) {
PieContextMenu.menuElement.style.display = 'none';
PieContextMenu.menuElement = null;
}
},
// private method. Get which context menu to show
getMenuElementId : function (e) {
if (PieContextMenu.IE) {
PieContextMenu.attachedElement = event.srcElement;
} else {
PieContextMenu.attachedElement = e.target;
}
while(PieContextMenu.attachedElement != null) {
var className = PieContextMenu.attachedElement.className;
if (typeof(className) != "undefined") {
className = className.replace(/^\s+/g, "").replace(/\s+$/g, "")
var classArray = className.split(/[ ]+/g);
for (i = 0; i < classArray.length; i++) {
if (PieContextMenu.menus[classArray[i]]) {
return PieContextMenu.menus[classArray[i]];
}
}
}
if (PieContextMenu.IE) {
PieContextMenu.attachedElement = PieContextMenu.attachedElement.parentElement;
} else {
PieContextMenu.attachedElement = PieContextMenu.attachedElement.parentNode;
}
}
return null;
},
// private method. Returns mouse position
getMousePosition : function (e) {
e = e ? e : window.event;
var position = {
'x' : e.clientX,
'y' : e.clientY
}
return position;
},
// private method. Get document scroll position
getScrollPosition : function () {
var x = 0;
var y = 0;
if( typeof( window.pageYOffset ) == 'number' ) {
x = window.pageXOffset;
y = window.pageYOffset;
} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
x = document.documentElement.scrollLeft;
y = document.documentElement.scrollTop;
} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
x = document.body.scrollLeft;
y = document.body.scrollTop;
}
var position = {
'x' : x,
'y' : y
}
return position;
}
}
PieContextMenu.init();
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