0 Replies Latest reply: Jan 4, 2013 8:26 AM by user-Rachna RSS

    JS Menu - 508 issue

    user-Rachna
      All,

      Below is the code for the menu, we are using. This only works for mouse hovering. I need to make it work with keyboard navigation too as per the 508 rules but I am not good in this.

      Here is the code:


      var ddsmoothmenu={

      //Specify full URL to down and right arrow images (23 is padding-right added to top level LIs with drop downs):
      arrowimages: {down:['downarrowclass', '/i/down.gif', 23], right:['rightarrowclass', '/i/blank.gif']},
      transition: {overtime:300, outtime:300}, //duration of slide in/ out animation, in milliseconds
      shadow: {enable:false, offsetx:5, offsety:5}, //enable shadow?
      showhidedelay: {showdelay: 100, hidedelay: 200}, //set delay in milliseconds before sub menus appear and disappear, respectively

      ///////Stop configuring beyond here///////////////////////////

      detectwebkit: navigator.userAgent.toLowerCase().indexOf("applewebkit")!=-1, //detect WebKit browsers (Safari, Chrome etc)
      detectie6: document.all && !window.XMLHttpRequest,
      css3support: window.msPerformance || (!document.all && document.querySelector), //detect browsers that support CSS3 box shadows (ie9+ or FF3.5+, Safari3+, Chrome etc)

      getajaxmenu:function($, setting){ //function to fetch external page containing the panel DIVs
           var $menucontainer=$('#'+setting.contentsource[0]) //reference empty div on page that will hold menu
           $menucontainer.html("Loading Menu...")
           $.ajax({
                url: setting.contentsource[1], //path to external menu file
                async: true,
                error:function(ajaxrequest){
                     $menucontainer.html('Error fetching content. Server Response: '+ajaxrequest.responseText)
                },
                success:function(content){
                     $menucontainer.html(content)
                     ddsmoothmenu.buildmenu($, setting)
                }
           })
      },


      buildmenu:function($, setting){
           var smoothmenu=ddsmoothmenu
           var $mainmenu=$("#"+setting.mainmenuid+">ul") //reference main menu UL
           $mainmenu.parent().get(0).className=setting.classname || "ddsmoothmenu"
           var $headers=$mainmenu.find("ul").parent()
           $headers.focus(
                function(e){
                     $(this).children('a:eq(0)').addClass('selected')
                },
                function(e){
                     $(this).children('a:eq(0)').removeClass('selected')
                }
           )
           $headers.each(function(i){ //loop through each LI header
                var $curobj=$(this).css({zIndex: 100-i}) //reference current LI header
                var $subul=$(this).find('ul:eq(0)').css({display:'block'})
                $subul.data('timers', {})
                this._dimensions={w:this.offsetWidth, h:this.offsetHeight, subulw:$subul.outerWidth(), subulh:$subul.outerHeight()}
                this.istopheader=$curobj.parents("ul").length==1? true : false //is top level header?
                $subul.css({top:this.istopheader && setting.orientation!='v'? this._dimensions.h+"px" : 0})
                $curobj.children("a:eq(0)").css(this.istopheader? {paddingRight: smoothmenu.arrowimages.down[2]} : {}).append( //add arrow images
                     '<img src="'+ (this.istopheader && setting.orientation!='v'? smoothmenu.arrowimages.down[1] : smoothmenu.arrowimages.right[1])
                     +'" class="' + (this.istopheader && setting.orientation!='v'? smoothmenu.arrowimages.down[0] : smoothmenu.arrowimages.right[0])
                     + '" style="border:0;" />'
                )
                if (smoothmenu.shadow.enable && !smoothmenu.css3support){ //if shadows enabled and browser doesn't support CSS3 box shadows
                     this._shadowoffset={x:(this.istopheader?$subul.offset().left+smoothmenu.shadow.offsetx : this._dimensions.w), y:(this.istopheader? $subul.offset().top+smoothmenu.shadow.offsety : $curobj.position().top)} //store this shadow's offsets
                     if (this.istopheader)
                          $parentshadow=$(document.body)
                     else{
                          var $parentLi=$curobj.parents("li:eq(0)")
                          $parentshadow=$parentLi.get(0).$shadow
                     }
                     this.$shadow=$('<div class="ddshadow'+(this.istopheader? ' toplevelshadow' : '')+'"></div>').prependTo($parentshadow).css({left:this._shadowoffset.x+'px', top:this._shadowoffset.y+'px'}) //insert shadow DIV and set it to parent node for the next shadow div
                }

                $curobj.hover
      (
                     function(e){
                          var $targetul=$subul //reference UL to reveal
                          var header=$curobj.get(0) //reference header LI as DOM object
                          clearTimeout($targetul.data('timers').hidetimer)
                          $targetul.data('timers').showtimer=setTimeout(function(){
                               header._offsets={left:$curobj.offset().left, top:$curobj.offset().top}
                               var menuleft=header.istopheader && setting.orientation!='v'? 0 : header._dimensions.w
                               menuleft=(header._offsets.left+menuleft+header._dimensions.subulw>$(window).width())? (header.istopheader && setting.orientation!='v'? -header._dimensions.subulw+header._dimensions.w : -header._dimensions.w) : menuleft //calculate this sub menu's offsets from its parent
                               if ($targetul.queue().length<=1){ //if 1 or less queued animations
                                    $targetul.css({left:menuleft+"px", width:header._dimensions.subulw+'px'}).animate({height:'show',opacity:'show'}, ddsmoothmenu.transition.overtime)
                                    if (smoothmenu.shadow.enable && !smoothmenu.css3support){
                                         var shadowleft=header.istopheader? $targetul.offset().left+ddsmoothmenu.shadow.offsetx : menuleft
                                         var shadowtop=header.istopheader?$targetul.offset().top+smoothmenu.shadow.offsety : header._shadowoffset.y
                                         if (!header.istopheader && ddsmoothmenu.detectwebkit){ //in WebKit browsers, restore shadow's opacity to full
                                              header.$shadow.css({opacity:1})
                                         }
                                         header.$shadow.css({overflow:'', width:header._dimensions.subulw+'px', left:shadowleft+'px', top:shadowtop+'px'}).animate({height:header._dimensions.subulh+'px'}, ddsmoothmenu.transition.overtime)
                                    }
                               }
                          }, ddsmoothmenu.showhidedelay.showdelay)
                     },
                     function(e){
                          var $targetul=$subul
                          var header=$curobj.get(0)
                          clearTimeout($targetul.data('timers').showtimer)
                          $targetul.data('timers').hidetimer=setTimeout(function(){
                               $targetul.animate({height:'hide', opacity:'hide'}, ddsmoothmenu.transition.outtime)
                               if (smoothmenu.shadow.enable && !smoothmenu.css3support){
                                    if (ddsmoothmenu.detectwebkit){ //in WebKit browsers, set first child shadow's opacity to 0, as "overflow:hidden" doesn't work in them
                                         header.$shadow.children('div:eq(0)').css({opacity:0})
                                    }
                                    header.$shadow.css({overflow:'hidden'}).animate({height:0}, ddsmoothmenu.transition.outtime)
                               }
                          }, ddsmoothmenu.showhidedelay.hidedelay)
                     }
                ) //end hover




           }) //end $headers.each()
           if (smoothmenu.shadow.enable && smoothmenu.css3support){ //if shadows enabled and browser supports CSS3 shadows
                var $toplevelul=$('#'+setting.mainmenuid+' ul li ul')
                var css3shadow=parseInt(smoothmenu.shadow.offsetx)+"px "+parseInt(smoothmenu.shadow.offsety)+"px 5px #aaa" //construct CSS3 box-shadow value
                var shadowprop=["boxShadow", "MozBoxShadow", "WebkitBoxShadow", "MsBoxShadow"] //possible vendor specific CSS3 shadow properties
                for (var i=0; i<shadowprop.length; i++){
                     $toplevelul.css(shadowprop, css3shadow)
                }
           }
           $mainmenu.find("ul").css({display:'none', visibility:'visible'})
      },

      init:function(setting){
           if (typeof setting.customtheme=="object" && setting.customtheme.length==2){ //override default menu colors (default/hover) with custom set?
                var mainmenuid='#'+setting.mainmenuid
                var mainselector=(setting.orientation=="v")? mainmenuid : mainmenuid+', '+mainmenuid
                document.write('<style type="text/css">\n'
                     mainselector' ul li a {background:'+setting.customtheme[0]+';}\n'
                     mainmenuid' ul li a:hover {background:'+setting.customtheme[1]+';}\n'
                +'</style>')
           }
           this.shadow.enable=(document.all && !window.XMLHttpRequest)? false : this.shadow.enable //in IE6, always disable shadow
           jQuery(document).ready(function($){ //ajax menu?
                if (typeof setting.contentsource=="object"){ //if external ajax menu
                     ddsmoothmenu.getajaxmenu($, setting)
                }
                else{ //else if markup menu
                     ddsmoothmenu.buildmenu($, setting)
                }
           })
      }

      } //end ddsmoothmenu variable