/*****************************************************
 * slideOutMenu
 * 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--
 *****************************************************/

slideOutMenu.Registry = []
slideOutMenu.aniLen = 450
slideOutMenu.hideDelay = 275
slideOutMenu.minCPUResolution = 10

// constructor
function slideOutMenu(id, dir, left, top, width, height)
{
  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.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 = "slideOutMenu_"+id
    eval(this.gRef+"=this")

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

    var d = document
    d.write('<style type="text/css">')
    d.write('#' + this.id + 'Container { visibility:hidden; ')
    d.write('left:' + left + 'px; ')
    d.write('top:' + top + 'px; ')
    d.write('overflow:hidden; }')
    d.write('#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; ')
    d.write('width:' + width + 'px; ')
    d.write('height:' + height + 'px; ')
//    d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ')
    d.write('}')
    d.write('</style>')

    this.load()
  }
}

slideOutMenu.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) / slideOutMenu.aniLen / slideOutMenu.aniLen

    // set event handlers.
    if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
//    this.menu.onmouseover = new Function("slideOutMenu.showMenu('" + this.id + "')")
//    this.menu.onmouseout = new Function("slideOutMenu.hideMenu('" + this.id + "')")

    //set initial state
    this.endSlide()
  }
}

slideOutMenu.showMenu = function(id)
{
  var reg = slideOutMenu.Registry
  var obj = slideOutMenu.Registry[id]

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

    // 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)
  }
}

slideOutMenu.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 = slideOutMenu.Registry[id]
     if (obj.container) {
       if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
       obj.hideTimer = window.setTimeout("slideOutMenu.hide('" + id + "')", slideOutMenu.hideDelay);
     }
}

slideOutMenu.hide = function(id)
{
  var obj = slideOutMenu.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)
}

slideOutMenu.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()", slideOutMenu.minCPUResolution)
}

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

slideOutMenu.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)
  }
}

slideOutMenu.prototype.setVisibility = function(bShow) {
  var s = this.ns4 ? this.container : this.container.style
  s.visibility = bShow ? "visible" : "hidden"
}
slideOutMenu.prototype.moveTo = function(p) {
  this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : (p) + "px"
}
slideOutMenu.prototype.getPos = function(c) {
  return parseInt(this.style[c])
}

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