/*======================================================================
  Javascript Menu 1.0
  Copyright (c) 2008 SCL Software (http://www.sclsoftware.com)
  You can use it freely as long as all copyright messages are intact.
======================================================================*/

if (typeof Scl == "undefined")
{
    var Scl = {};
}

(function()
{
    Scl.MenuItem = function(text, link, cssClass)
    {
        this.text = text;
        this.link = link;
        this.cssClass = cssClass;
    };

Scl.Menu = function(menuWidth)
{
    var instance = this;
    var menuDiv;
    var menuItems = new Array();
    var dockElement;
    var left = 0;
    var top = 0;
    var width = menuWidth ? menuWidth : 200;
    var height = 0;
    var hideThread;
    var fullVisible = false;
    var animationThread;
    var animationStart = 0;
    var animationEnd = 0;
    var ANIMATION_NONE = 0;
    var ANIMATION_VERTICAL = 1;
    this.animationType = ANIMATION_VERTICAL;
    this.animationSpeed = 10;
    this.animationStep = 15;
    this.margin = 0;
    this.menuCssClass = 'menu';
    this.menuItemCssClass = 'menuItem';
    this.rightToLeft = false;
    this.bottomToTop = false;
    this.hideTimeOut = 120;

this.addItem = function(text, link, cssClass)
{
    menuItems.push(new Scl.MenuItem(text, link, cssClass));
};

this.dockTo = function(element)
{
        addEvent(window, 'load', function(){ dockToElement(element); }, false);
};

this.showAt = function(element)
{
    initialize();

        var position = getPosition(element);
        position.y += (instance.bottomToTop) ? (height + instance.margin) * -1 : instance.margin + element.offsetHeight;

        show(position.x, position.y);
};

this.showAtPosition = function(x, y)
{
    initialize();
    show(x, y);
};

this.hide = function()
{
    hideThread = setTimeout(hideMenu, instance.hideTimeOut);
};

function dockToElement(element)
{
    if(typeof(element) == 'string')
            {
                element = document.getElementById(element);
            }

            dockElement = element;
        addEvent(element, 'mouseover', showAtDockElement, false);
        addEvent(element, 'mouseout', instance.hide, false);
};

function showAtDockElement()
{
        instance.showAt(dockElement);
};

function initialize()
{
    if(menuDiv == null)
    {
        createMenu();
    }
};

function show(x, y)
{
    cancelHide();

        menuDiv.style.left = x + 'px';
        menuDiv.style.top = y + 'px';

        // Asignar para la animacion
        left = x;
        top = y;

        switch(instance.animationType)
        {
            case ANIMATION_NONE:
            menuDiv.style.display = 'block';
            break;

            default:
            startAnimation(0, height);
            break;
        }
};

function createMenu()
    {
            menuDiv = document.createElement('div');
            menuDiv.style.position = 'absolute';

        var innerDiv = document.createElement('div');
            menuDiv.appendChild(innerDiv);

            innerDiv.className = instance.menuCssClass;
            innerDiv.style.width = width + 'px';

        addEvent(menuDiv, 'mouseover', cancelHide, false);
        addEvent(menuDiv, 'mouseout', instance.hide, false);

        // Add items
        for(var i=0; i< menuItems.length; i++)
        {
            var menuItemDiv = createMenuItem(menuItems[i]);
                innerDiv.appendChild(menuItemDiv);
        }

        // Add to the document
            document.body.appendChild(menuDiv);

        height = menuDiv.offsetHeight;
};

function createMenuItem(menuItem)
    {
            var menuItemDiv = document.createElement('div');
            menuItemDiv.className = menuItem.cssClass != null ? menuItem.cssClass : instance.menuItemCssClass;

            if(menuItem.link != null)
            {
                menuItemDiv.link = menuItem.link; // Crear la propiedad con el link para cada elemento
                menuItemDiv.onclick = function(){ window.location = menuItem.link; };
                var link = document.createElement('a');
                link.setAttribute('href', menuItem.link);
                link.appendChild(document.createTextNode(menuItem.text));
                menuItemDiv.appendChild(link);
            }

            return menuItemDiv;
};

function cancelHide()
{
    clearTimeout(hideThread);
    hideThread = null;
};

function hideMenu()
{
    switch(instance.animationType)
        {
            case ANIMATION_NONE:
            menuDiv.style.display = 'none';
            break;

            default:
            startAnimation(parseStyle(menuDiv.style.height), 0);
            break;
        }
};

function parseStyle(value)
{
    return parseInt(value.substring(0, value.length-2));
};

function getPosition(element)
        {
            var posx = 0;
            var posy = 0;

            if (element.offsetParent)
            {
                do
                {
                    posx += element.offsetLeft;
                    posy += element.offsetTop;

                    if (!element.offsetParent)
                    {
                         break;
                    }
                }
                while (element = element.offsetParent)
            }
            else if (element.x)
            {
                posx += element.x;
                posy += element.y;
            }

            return {x:posx, y:posy};
        };

        function addEvent(element, evType, functionName, useCapture)
        {
            if(element.addEventListener)
            {
                element.addEventListener(evType, functionName, useCapture);
            }
            else if(element.attachEvent)
            {
                element.attachEvent('on' + evType , functionName);
            }
            else
            {
                element['on' + evType] = functionName;
            }
        };

function startAnimation(start, end)
{
            var showing = end > start;

    if(showing & fullVisible)
    {
        return;
    }

    menuDiv.style.zIndex = showing ? 20 : 1;

    animationStart = start;
    animationEnd = end;
        menuDiv.style.overflow = 'hidden';
    menuDiv.style.display = 'block';
        menuDiv.style.height = animationStart + 'px';

        fullVisible = false;

        clearInterval(animationThread);

            switch(instance.animationType)
        {
            case ANIMATION_VERTICAL:
                if(instance.bottomToTop)
                    {
                    menuDiv.style.top = (top + height - menuDiv.offsetHeight) + 'px';
                }
                animationThread = setInterval(animateVertical, instance.animationSpeed);
            break;
        }
};

        function animateVertical()
        {
            var showing = animationEnd > animationStart;

            var strHeight = menuDiv.style.height;
            var animationHeight = parseInt(strHeight.substring(0, strHeight.length-2));

            if((showing & animationHeight >= animationEnd) || (!showing & animationHeight <= animationEnd))
            {
                clearInterval(animationThread);

        if(showing)
        {
            fullVisible = true;
        }
        else
        {
            menuDiv.style.display = 'none';
        }
            }
            else
            {
                animationHeight += showing ? instance.animationStep : -instance.animationStep;

                if((showing & animationHeight > animationEnd) || (!showing & animationHeight < animationEnd))
                {
                    animationHeight = animationEnd;
                }

                menuDiv.style.height = animationHeight + 'px';

                if(instance.bottomToTop)
                {
                    menuDiv.style.top = (top + height - animationHeight) + 'px';
                }
            }
        };
};
})();