/*****************************************************
 * 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 = 1000;
ypSlideOutMenu.minCPUResolution = 10;

ypSlideOutMenu.defaultDisplayDelay = 1000; // added by ARC
ypSlideOutMenu.defaultDisplayTimer = null; // added by ARC
ypSlideOutMenu.defaultMenu = null; // added by ARC

// 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;

    if (ypSlideOutMenu.defaultMenu != id) { // don't hide the default menu

      var strCSS = "";
      strCSS += '#' + this.id + 'Container { visibility:hidden; ';
      strCSS += 'left:' + left + 'px; ';
      strCSS += 'top:' + top + 'px; ';
      strCSS += 'overflow:hidden; z-index:10000; }';
      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 += '}';

      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
    if (ypSlideOutMenu.defaultMenu != this.id) {
      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);

    // don't show default menu soon
    if (ypSlideOutMenu.defaultDisplayTimer) { ypSlideOutMenu.defaultDisplayTimer = window.clearTimeout(ypSlideOutMenu.defaultDisplayTimer) }

  }
};

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);
  }
  // show default menu soon
  if (ypSlideOutMenu.defaultMenu) {
    ypSlideOutMenu.defaultDisplayTimer = window.setTimeout("ypSlideOutMenu.showMenu('" + ypSlideOutMenu.defaultMenu + "')", ypSlideOutMenu.defaultDisplayDelay);
  }
};

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() { };