if(!CU)
	var CU = {};

/**
 * Namespace and static functions for pie menus
 *
 */
CU.PieMenu = function() 
{
	/**
	 * The currently open piemenu
	 */
	var _elem;

	/**
	 * _elem visible/not
	 */
	var _visible = false;

	/**
	 * holds the setTimeout-id for autohiding the menu
	 */
	var _hideTimer = null;
	
	$(document).click(_hide);
	
	/**
	 * _hide event handler
	 */
	function _hide()
	{
		if(_visible && _elem)
		{
			_elem.hide();
			_visible = false;
		}
	}


	return {
		/**
		 * Menu autohide timeout, in seconds
		 */
		autoHideTimeout: 2,
		
		/**
		 * Function for displaying a menu
		 *
		 * @param CU.PieMenu.Leaf leaf The root menu leaf
		 * @param Object event the click event
		 */
		show: function(leaf,event)
		{
			var ev = $.event.fix( event || window.event || {} );
			
			if(_elem)
				_hide();	

			_elem = leaf;
		
			_elem.setPosition(ev.pageX-25,ev.pageY-25);
			_visible = true;
			_elem.show();
			_elem.showNeighbors();

			ev.stopPropagation();
		},

		/**
		 * Called when menu loses focus. Used to start auto hide timer
		 */
		offFocus: function()
		{
			if(_hideTimer == null)
				_hideTimer = setTimeout(_hide,CU.PieMenu.autoHideTimeout*1000);
		},

		/**
		 * Called when menu gets focus. Used to stop auto hide timer
		 */
		onFocus: function()
		{
			clearTimeout(_hideTimer);
			_hideTimer = null;
		}
	};
}();

/**
 * Piemenu leaf class
 *
 * The menus are built of these
 *
 * @param string text The text to show in the leaf
 * @param string link optional, the URL where clicking the leaf will take
 */
CU.PieMenu.Leaf = function(text,link)	
{
	/**
	 * A jQuery object containing the leaf's HTML element
	 */
	this.element;

	/**
	 * the neighboring leaves
	 */
	var _neighbors = { top:null,left:null,right:null,bottom:null };

	var _position = { x:0, y:0 };
	
	/**
	 * parent leaf
	 */
	var _parent = null;
	
	var _self = this;
	var _link = link;
	
	_self.element = $('<div class="pieMenu leaf"></div>').html(text);
	$(document.body).append(_self.element.hide());
	_self.element.hover(_onHover,_offHover);
	_self.element.click(_go);
	
	this.setParent = function(p)
	{
		_parent = p;
	};
	
	this.setPosition = function(x,y)
	{
		_self.element.css({left:x,top:y});
		_position.x = x;
		_position.y = y;
	};

	this.show = function(hideNeighbors)
	{
		_self.element.show();
	};

	this.hide = function()
	{
		_self.element.hide();
		_hideNeighbors();
	};

	/**
	 * add a neighbor leaf.
	 *
	 * @param string where Which neighbor the new leaf is. Can be left,top,right,bottom
	 * @param CU.PieMenu.Leaf leaf
	 */
	this.addNeighbor = function(where,leaf)
	{
		_neighbors[where] = leaf;
		leaf.setParent(this);
	};

	function _go()
	{
		if(_link)
			window.location = _link;
	}

	function _onHover()
	{
		CU.PieMenu.onFocus();
		
		//Only hide parent's neighbors if this leaf has neighbors.
		if(_parent && (_neighbors.left || _neighbors.top || _neighbors.right || _neighbors.bottom))
			_parent.hideNeighbors(_self);
			
		_showNeighbors();
	}

	function _offHover()
	{
		CU.PieMenu.offFocus();
	}
	
	function _showNeighbors()
	{
		for(property in _neighbors)
		{
			if(_neighbors[property] == null)
				continue;

			_neighbors[property].show(true);

			//The neighbors need to be positioned correctly so this switch does that...
			//TODO: change this cause this sucks and uses a hardcoded width =)
			switch(property)
			{
				case 'left':
					_neighbors[property].setPosition(_position.x-50,_position.y);
					break;
				case 'right':
					_neighbors[property].setPosition(_position.x+50,_position.y);
					break;
				case 'top':
					_neighbors[property].setPosition(_position.x,_position.y-50);
					break;
				case 'bottom':
					_neighbors[property].setPosition(_position.x,_position.y+50);
					break;
			}

			_neighbors[property].hideNeighbors();
		}
	}

	function _hideNeighbors(except)
	{
		for(property in _neighbors)
		{
			if(_neighbors[property] != null && _neighbors[property] != except)
				_neighbors[property].hide();
		}
	}

	//these two funcs need to be public too
	this.hideNeighbors = _hideNeighbors;
	this.showNeighbors = _showNeighbors;
}