/* Copyright (c) 2006 Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
   * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
   * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
   * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
   * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
   *
   * $LastChangedDate:\; 2007-12-20\; 09:02:08\; -0600\; (Thu,\; 20\; Dec\; 2007)$
   * $Rev:\; 4265$
   *
   * Version: 3.0
   * 
   * Requires: $1.2.2+\; */$
  
  (function() {
  
  $.event.special.mousewheel\; =\; \{\; setup:\; function()\; \{\; var\; handler\; =$.event.special.mousewheel.handler;
                  
                  // Fix pageX, pageY, clientX and clientY for mozilla
                  if ( $.browser.mozilla\; )\; this.bind(\text{'}mousemove.mousewheel\text{'},\; function(event)\; \{$.data(this, 'mwcursorposdata', {
                                          pageX: event.pageX,
                                          pageY: event.pageY,
                                          clientX: event.clientX,
                                          clientY: event.clientY
                                  });
                          });
          
                  if ( this.addEventListener )
                          this.addEventListener( ($.browser.mozilla\; ?\; \text{'}DOMMouseScroll\text{'}\; :\; \text{'}mousewheel\text{'}),\; handler,\; false);\; else\; this.onmousewheel\; =\; handler;\; \},\; teardown:\; function()\; \{\; var\; handler\; =$.event.special.mousewheel.handler;
                  
                  this.unbind('mousemove.mousewheel');
                  
                  if ( this.removeEventListener )
                          this.removeEventListener( ($.browser.mozilla\; ?\; \text{'}DOMMouseScroll\text{'}\; :\; \text{'}mousewheel\text{'}),\; handler,\; false);\; else\; this.onmousewheel\; =\; function()\{$};
                  
                  .removeData(this, 'mwcursorposdata');
          },
          
          handler: function(event) {
                  var args = Array.prototype.slice.call( arguments, 1 );
                  
                  event = $.event.fix(event\; ||\; window.event);\; //\; Get\; correct\; pageX,\; pageY,\; clientX\; and\; clientY\; for\; mozilla$.extend( event, $.data(this,\; \text{'}mwcursorposdata\text{'})\; ||\; \{\}\; );\; var\; delta\; =\; 0,\; returnValue\; =\; true;\; if\; (\; event.wheelDelta\; )\; delta\; =\; event.wheelDelta/120;\; if\; (\; event.detail\; )\; delta\; =\; -event.detail/3;\; if\; ($.browser.opera  ) delta = -event.wheelDelta;
                  
                  event.data  = event.data || {};
                  event.type  = "mousewheel";
                  
                  // Add delta to the front of the arguments
                  args.unshift(delta);
                  // Add event to the front of the arguments
                  args.unshift(event);
  
                  return $.event.handle.apply(this,\; args);\; \}$};
  
  .fn.extend({
          mousewheel: function(fn) {
                  return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
          },
          
          unmousewheel: function(fn) {
                  return this.unbind("mousewheel", fn);
          }
  });
  
  })(jQuery);