/**
 * Interface Elements for jQuery
 * Fisheye menu
 * 
 * http://interface.eyecon.ro
 * 
 * Copyright (c) 2006 Stefan Petre
 * Dual licensed under the MIT (MIT-LICENSE.txt) 
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 */
/**
 * Build a Fisheye menu from a list of links
 *
 * @name Fisheye
 * @description Build a Fisheye menu from a list of links
 * @param Hash hash A hash of parameters
 * @option String items items selection
 * @option String container container element
 * @option Integer itemWidth the minimum width for each item
 * @option Integer maxWidth the maximum width for each item
 * @option String itemsText selection of element that contains the text for each item
 * @option Integer proximity the distance from element that make item to interact
 * @option String valign vertical alignment
 * @option String halign horizontal alignment
 * @option String group separator width
 * @type jQuery
 * @cat Plugins/Interface
 * @author Stefan Petre
 */
jQuery.iFisheye = {
build : function(options)
{
        
return this.each(
function()
{
var el = this;
                var showContainer = 0;
el.fisheyeCfg = {
items : jQuery(options.items, this),
container: jQuery(options.container, this),
pos : jQuery.iUtil.getPosition(this),
itemWidth: options.itemWidth,
itemsText: options.itemsText,
proximity: options.proximity,
valign: options.valign,
halign: options.halign,
maxWidth : options.maxWidth,
                    groupSeparatorWidth : options.groupSeparatorWidth
};
jQuery.iFisheye.positionContainer(el, 0);
jQuery(window).bind(
'resize',
function()
{
el.fisheyeCfg.pos = jQuery.iUtil.getPosition(el);
jQuery.iFisheye.positionContainer(el, 0);
jQuery.iFisheye.positionItems(el);
}
);
jQuery.iFisheye.positionItems(el);
el.fisheyeCfg.items
.bind(
'mouseover',
function()
{
jQuery(el.fisheyeCfg.itemsText, this).get(0).style.display = 'block';
}
)
.bind(
'mouseout',
function()
{
jQuery(el.fisheyeCfg.itemsText, this).get(0).style.display = 'none';
}
);
jQuery(document).bind(
'mousemove',
function(e)
{
var pointer = jQuery.iUtil.getPointer(e);
var toAdd = 0;
if (el.fisheyeCfg.halign && el.fisheyeCfg.halign == 'center')
var posx = pointer.x - el.fisheyeCfg.pos.x - (el.offsetWidth - el.fisheyeCfg.itemWidth * el.fisheyeCfg.items.size())/2 - el.fisheyeCfg.itemWidth/2;
else if (el.fisheyeCfg.halign && el.fisheyeCfg.halign == 'right')
var posx = pointer.x - el.fisheyeCfg.pos.x - el.offsetWidth + el.fisheyeCfg.itemWidth * el.fisheyeCfg.items.size();
else 
var posx = pointer.x - el.fisheyeCfg.pos.x;
var posy = Math.pow(pointer.y - el.fisheyeCfg.pos.y - el.offsetHeight/2,2);
el.fisheyeCfg.items.each(
function(nr)
{
distance = Math.sqrt(
Math.pow(posx - nr*el.fisheyeCfg.itemWidth, 2)
+ posy
);
distance -= el.fisheyeCfg.itemWidth/2;
distance = distance < 0 ? 0 : distance;
distance = distance > el.fisheyeCfg.proximity ? el.fisheyeCfg.proximity : distance;
distance = el.fisheyeCfg.proximity - distance;
extraWidth = el.fisheyeCfg.maxWidth * distance/el.fisheyeCfg.proximity;
this.style.width = el.fisheyeCfg.itemWidth + extraWidth + 'px';
this.style.left = el.fisheyeCfg.itemWidth * nr + toAdd + 'px';
toAdd += extraWidth;
}
);
jQuery.iFisheye.positionContainer(el, toAdd);
}
);
}
            
)
        
},
positionContainer : function(el, toAdd)
{
if (el.fisheyeCfg.halign)
if (el.fisheyeCfg.halign == 'center')
el.fisheyeCfg.container.get(0).style.left = (el.offsetWidth - el.fisheyeCfg.itemWidth * el.fisheyeCfg.items.size())/2 - toAdd/2 + 'px';
else if (el.fisheyeCfg.halign == 'left')
el.fisheyeCfg.container.get(0).style.left =  - toAdd/el.fisheyeCfg.items.size() + 'px';
else if (el.fisheyeCfg.halign == 'right')
el.fisheyeCfg.container.get(0).style.left =  (el.offsetWidth - el.fisheyeCfg.itemWidth * el.fisheyeCfg.items.size()) - toAdd/2 + 'px';
el.fisheyeCfg.container.get(0).style.width = el.fisheyeCfg.itemWidth * el.fisheyeCfg.items.size() + toAdd + 'px';
    },
positionItems : function(el)
{
el.fisheyeCfg.items.each(
function(nr)
{
                this.style.width = el.fisheyeCfg.itemWidth + 'px';
                this.style.left = el.fisheyeCfg.itemWidth * nr + 'px';
}
);
}
};
jQuery.fn.Fisheye = jQuery.iFisheye.build;