/*****************************************************
 * ypslideoutmenu
 * http://ypslideoutmenus.sourceforge.net/
 * 3/04/2001
 * 
 * a nice little script to create exclusive, slide-out
 * menus for ns4, ns6, mozilla, opera, ie4, ie5 on 
 * mac and win32. i've got no linux or unix to test on but 
 * it should(?) work... 
 *
 * licensed under afl 2.0
 * http://www.opensource.org/licenses/afl-2.0.php
 *
 * revised: 
 * - 08/29/2002 : added .hideall()
 * - 04/15/2004 : added .writecss() to support more 
 *                than 30 menus.
 *
 * --youngpup--
 *****************************************************/

ypslideoutmenu.registry = []
ypslideoutmenu.anilen = 250
ypslideoutmenu.hidedelay = 500
ypslideoutmenu.mincpuresolution = 10

// constructor
function ypslideoutmenu(id, dir, left, top, width, height)
{
	this.ie  = document.all ? 1 : 0
	this.ns4 = document.layers ? 1 : 0
	this.dom = document.getelementbyid ? 1 : 0
	this.css = "";

	if (this.ie || this.ns4 || this.dom) {
		this.id			 = id
		this.dir		 = dir
		this.orientation = dir == "left" || dir == "right" ? "h" : "v"
		this.dirtype	 = dir == "right" || dir == "down" ? "-" : "+"
		this.dim		 = this.orientation == "h" ? width : height
		this.hidetimer	 = false
		this.anitimer	 = false
		this.open		 = false
		this.over		 = false
		this.starttime	 = 0

		// global reference to this object
		this.gref = "ypslideoutmenu_"+id
		eval(this.gref+"=this")

		// add this menu object to an internal list of all menus
		ypslideoutmenu.registry[id] = this

		var d = document

		var strcss = "";
		strcss += '#' + this.id + 'container { visibility:hidden; '
		strcss += 'left:' + left + 'px; '
		strcss += 'top:' + top + 'px; '
		strcss += 'width:' + width + 'px; '
		strcss += 'height:' + height + 'px; '		
		strcss += 'overflow:hidden; z-index:10000; }'
		strcss += '#' + this.id + 'container, #' + this.id + 'content { position:absolute; '
		strcss += '}'

		this.css = strcss;

		this.load()
	}
}

ypslideoutmenu.writecss = function() {
	document.writeln('<style type="text/css">');

	for (var id in ypslideoutmenu.registry) {
		document.writeln(ypslideoutmenu.registry[id].css);
	}

	document.writeln('</style>');
}

ypslideoutmenu.prototype.load = function() {
	var d = document
	var lyrid1 = this.id + "container"
	var lyrid2 = this.id + "content"
	var obj1 = this.dom ? d.getelementbyid(lyrid1) : this.ie ? d.all[lyrid1] : d.layers[lyrid1]
	if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrid2] : this.ie ? d.all[lyrid2] : d.getelementbyid(lyrid2)
	var temp

	if (!obj1 || !obj2) window.settimeout(this.gref + ".load()", 100)
	else {
		this.container	= obj1
		this.menu		= obj2
		this.style		= this.ns4 ? this.menu : this.menu.style
		this.homepos	= eval("0" + this.dirtype + this.dim)
		this.outpos		= 0
		this.accelconst	= (this.outpos - this.homepos) / ypslideoutmenu.anilen / ypslideoutmenu.anilen 

		// set event handlers.
		if (this.ns4) this.menu.captureevents(event.mouseover | event.mouseout);
		this.menu.onmouseover = new function("ypslideoutmenu.showmenu('" + this.id + "')")
		this.menu.onmouseout = new function("ypslideoutmenu.hidemenu('" + this.id + "')")

		//set initial state
		this.endslide()
	}
}
	
ypslideoutmenu.showmenu = function(id)
{
	var reg = ypslideoutmenu.registry
	var obj = ypslideoutmenu.registry[id]
	
	if (obj.container) {
		obj.over = true

		// close other menus.
		for (menu in reg) if (id != menu) ypslideoutmenu.hide(menu)

		// if this menu is scheduled to close, cancel it.
		if (obj.hidetimer) { reg[id].hidetimer = window.cleartimeout(reg[id].hidetimer) }

		// if this menu is closed, open it.
		if (!obj.open && !obj.anitimer) reg[id].startslide(true)
	}
}

ypslideoutmenu.hidemenu = function(id)
{
	// schedules the menu to close after <hidedelay> ms, which
	// gives the user time to cancel the action if they accidentally moused out
	var obj = ypslideoutmenu.registry[id]
	if (obj.container) {
		if (obj.hidetimer) window.cleartimeout(obj.hidetimer)
		obj.hidetimer = window.settimeout("ypslideoutmenu.hide('" + id + "')", ypslideoutmenu.hidedelay);
	}
}

ypslideoutmenu.hideall = function()
{
	var reg = ypslideoutmenu.registry
	for (menu in reg) {
		ypslideoutmenu.hide(menu);
		if (menu.hidetimer) window.cleartimeout(menu.hidetimer);
	}
}

ypslideoutmenu.hide = function(id)
{
	var obj = ypslideoutmenu.registry[id]
	obj.over = false

	if (obj.hidetimer) window.cleartimeout(obj.hidetimer)
	
	// flag that this scheduled event has occured.
	obj.hidetimer = 0

	// if this menu is open, close it.
	if (obj.open && !obj.anitimer) obj.startslide(false)
}

ypslideoutmenu.prototype.startslide = function(open) {
	this[open ? "onactivate" : "ondeactivate"]()
	this.open = open
	if (open) this.setvisibility(true)
	this.starttime = (new date()).gettime()	
	this.anitimer = window.setinterval(this.gref + ".slide()", ypslideoutmenu.mincpuresolution)
}

ypslideoutmenu.prototype.slide = function() {
	var elapsed = (new date()).gettime() - this.starttime
	if (elapsed > ypslideoutmenu.anilen) this.endslide()
	else {
		var d = math.round(math.pow(ypslideoutmenu.anilen-elapsed, 2) * this.accelconst)
		if (this.open && this.dirtype == "-")		d = -d
		else if (this.open && this.dirtype == "+")	d = -d
		else if (!this.open && this.dirtype == "-")	d = -this.dim + d
		else										d = this.dim + d

		this.moveto(d)
	}
}

ypslideoutmenu.prototype.endslide = function() {
	this.anitimer = window.cleartimeout(this.anitimer)
	this.moveto(this.open ? this.outpos : this.homepos)
	if (!this.open) this.setvisibility(false)
	if ((this.open && !this.over) || (!this.open && this.over)) {
		this.startslide(this.over)
	}
}

ypslideoutmenu.prototype.setvisibility = function(bshow) { 
	var s = this.ns4 ? this.container : this.container.style
	s.visibility = bshow ? "visible" : "hidden"
}
ypslideoutmenu.prototype.moveto = function(p) { 
	this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}
ypslideoutmenu.prototype.getpos = function(c) {
	return parseint(this.style[c])
}

// events
ypslideoutmenu.prototype.onactivate		= function() { }
ypslideoutmenu.prototype.ondeactivate	= function() { }