/*****************************************************
 * ypSlideOutMenu
 * 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... 
 *
 * --youngpup--
 *****************************************************/




ypSlideOutMenuSet.registry = [];

function ypSlideOutMenuSet(sDir, iAniLen, iHideDelay, iTargetResolution, oParent)
{
        this.child = null;
        this.aniLen = iAniLen ? iAniLen : 250;
        this.hideDelay = iHideDelay ? iHideDelay : 1000;
        this.targetResolution = iTargetResolution ? iTargetResolution : 10;

        if (oParent) {
                this.parent = oParent;
                oParent.child = this;
        }
        else {
                this.parent = null;
        }

        this.showMenu = showMenu;
        this.hideMenu = hideMenu;
        this.hideAll = hideAll;
        this.addMenu = addMenu;
        this.hide = hide;

        var aRegistry = [];
        var oThis = this;
        var iIndex = ypSlideOutMenuSet.registry.length;

        ypSlideOutMenuSet.registry[iIndex] = this;

        function addMenu(id, left, top, width, height) {
                return aRegistry[id] = new ypSlideOutMenu(id, sDir, left, top, width, height, this);
        }

        function showMenu(id) {
                var reg = aRegistry
                var obj = aRegistry[id]

                // if this is a sub-menu, hold open it's parent
                if (this.parent != null) {
                        this.parent.parent.showMenu(this.parent.id);
                }

                if (obj.container) {
                        obj.over = true

                        // close other menus.
                        for (menu in reg) if (id != menu) oThis.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)
                }
        }

        function hideMenu(id, delay) {
                if (!delay) delay = this.hideDelay;

                // schedules the menu to close after <hideDelay> ms, which
                // gives the user time to cancel the action if they accidentally moused out
                var obj = aRegistry[id]

                // if this is a sub-menu, schedule it's parent to close
                if (this.parent != null) {
                        this.parent.parent.hideMenu(this.parent.id, this.hideDelay);
                }

                if (obj.container) {
                        if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
                        obj.hideTimer = window.setTimeout("ypSlideOutMenuSet.registry[" + iIndex + "].hide('" + id + "')", delay);
                }
        }

        function hideAll() {
                var reg = aRegistry
                for (menu in reg) {
                        this.hide(menu);
                        if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
                }
        }

        function hide(id) {
                var obj = aRegistry[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)

                // if there are child menusets, close them
                if (obj.child != null) {
                        obj.child.hideAll();
                }
        }


}

// constructor
function ypSlideOutMenu(id, dir, left, top, width, height, parent)
{
	this.ie  = document.all ? 1 : 0
	this.ns4 = document.layers ? 1 : 0
	this.dom = document.getElementById ? 1 : 0

	if (this.ie || this.ns4 || this.dom) {
                this.parent      = parent
		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 = '<style type="text/css">';
                strCSS += '#' + this.id + 'Container { visibility:hidden; '
		strCSS += 'left:' + left + 'px; '
		strCSS += 'top:' + top + 'px; '
		strCSS += 'overflow:hidden; }'
		strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
		strCSS += 'width:' + width + 'px; '
		strCSS += 'height:' + height + 'px; '
		strCSS += 'clip:rect(0 ' + width + ' ' + height + ' 0); '
		strCSS += '}'
                strCSS += '</style>';

                d.write(strCSS)

		this.load()
	}
}

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
        var oThis = this;

	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) / this.parent.aniLen / this.parent.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 + "')")
		this.menu.onmouseover = function() { oThis.parent.showMenu(oThis.id) }
                this.menu.onmouseout = function() { oThis.parent.hideMenu(oThis.id) }

		//set initial state
		this.endSlide()
	}
}
	
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()", this.parent.targetResolution)
        }

ypSlideOutMenu.prototype.slide = function() {
	var elapsed = (new Date()).getTime() - this.startTime
	if (elapsed > this.parent.aniLen) this.endSlide()
	else {
		var d = Math.round(Math.pow(this.parent.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() { }