/* Ultimate Fade-in slideshow (v2.1)

* Last updated: Sept 10th, 2009. This notice must stay intact for usage 

* Author: Dynamic Drive at http://www.dynamicdrive.com/

* Visit http://www.dynamicdrive.com/ for full source code

*/



//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize



var fadeSlideShow_descpanel={

    controls: [['x.png',7,7], ['restore.png',10,11], ['loading.gif',54,55]], //full URL and dimensions of close, restore, and loading images

    fontStyle: 'normal 11px Verdana', //font style for text descriptions

    slidespeed: 200 //speed of description panel animation (in millisec)

}



//No need to edit beyond here...



jQuery.noConflict()



function fadeSlideShow(settingarg){

    this.setting=settingarg

    settingarg=null

    var setting=this.setting

    setting.fadeduration=setting.fadeduration? parseInt(setting.fadeduration) : 500

    setting.curimage=(setting.persist)? fadeSlideShow.routines.getCookie("gallery-"+setting.wrapperid) : 0

    setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty

    setting.currentstep=0 //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)

    setting.totalsteps=setting.imagearray.length*(setting.displaymode.cycles>0? setting.displaymode.cycles : Infinity) //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)

    setting.fglayer=0, setting.bglayer=1 //index of active and background layer (switches after each change of slide)

    setting.oninit=setting.oninit || function(){}

    setting.onslide=setting.onslide || function(){}

    if (setting.displaymode.randomize) //randomly shuffle order of images?

        setting.imagearray.sort(function() {return 0.5 - Math.random()})

    var preloadimages=[] //preload images

    setting.longestdesc="" //get longest description of all slides. If no desciptions defined, variable contains ""

    for (var i=0; i<setting.imagearray.length; i++){ //preload images

        preloadimages[i]=new Image()

        preloadimages[i].src=setting.imagearray[i][0]

        if (setting.imagearray[i][3] && setting.imagearray[i][3].length>setting.longestdesc.length)

            setting.longestdesc=setting.imagearray[i][3]

    }

    var closebutt=fadeSlideShow_descpanel.controls[0] //add close button to "desc" panel if descreveal="always"

    setting.closebutton=(setting.descreveal=="always")? '<img class="close" src="'+closebutt[0]+'" style="float:right;cursor:hand;cursor:pointer;width:'+closebutt[1]+'px;height:'+closebutt[2]+'px;margin-left:2px" title="Hide Description" />' : ''

    var slideshow=this

    jQuery(document).ready(function($){ //fire on DOM ready

        var setting=slideshow.setting

        var fullhtml=fadeSlideShow.routines.getFullHTML(setting.imagearray) //get full HTML of entire slideshow

        setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'white', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main slideshow DIV

        if (setting.$wrapperdiv.length==0){ //if no wrapper DIV found

            alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")

            return

        }

        setting.$gallerylayers=$('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 

            .css({position:'absolute', left:0, top:0, width:'100%', height:'100%', background:'white'})

            .appendTo(setting.$wrapperdiv)

        var $loadingimg=$('<img src="'+fadeSlideShow_descpanel.controls[2][0]+'" style="position:absolute;width:'+fadeSlideShow_descpanel.controls[2][1]+';height:'+fadeSlideShow_descpanel.controls[2][2]+'" />')

            .css({left:setting.dimensions[0]/2-fadeSlideShow_descpanel.controls[2][1]/2, top:setting.dimensions[1]/2-fadeSlideShow_descpanel.controls[2][2]}) //center loading gif

            .appendTo(setting.$wrapperdiv)

        var $curimage=setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage) //prefill both layers with entire slideshow content, hide all images, and return current image

        if (setting.longestdesc!=""){ //if at least one slide contains a description (feature is enabled)

            fadeSlideShow.routines.adddescpanel($, setting)

            if (setting.descreveal=="always"){ //position desc panel so it's visible to begin with

                setting.$descpanel.css({top:setting.dimensions[1]-setting.panelheight})

                setting.$descinner.click(function(e){ //asign click behavior to "close" icon

                    if (e.target.className=="close"){

                        slideshow.showhidedescpanel('hide')

                    }

                })

                setting.$restorebutton.click(function(e){ //asign click behavior to "restore" icon

                    slideshow.showhidedescpanel('show')

                    $(this).css({visibility:'hidden'})

                })

            }

            else{ //display desc panel on demand (mouseover)

                setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidedescpanel('show')})

                setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidedescpanel('hide')})

            }

        }

        setting.$wrapperdiv.bind('mouseenter', function(){setting.ismouseover=true}) //pause slideshow mouseover

        setting.$wrapperdiv.bind('mouseleave', function(){setting.ismouseover=false})

        if ($curimage.get(0).complete){ //accounf for IE not firing image.onload

            $loadingimg.hide()

            slideshow.paginateinit($)

            slideshow.showslide(setting.curimage)

        }

        else{ //initialize slideshow when first image has fully loaded

            $loadingimg.hide()

            slideshow.paginateinit($)

            $curimage.bind('load', function(){slideshow.showslide(setting.curimage)})

        }

        setting.oninit.call(slideshow) //trigger oninit() event

        $(window).bind('unload', function(){ //clean up and persist

            if (slideshow.setting.persist) //remember last shown image's index

                fadeSlideShow.routines.setCookie("gallery-"+setting.wrapperid, setting.curimage)

            jQuery.each(slideshow.setting, function(k){

                if (slideshow.setting[k] instanceof Array){

                    for (var i=0; i<slideshow.setting[k].length; i++){

                        if (slideshow.setting[k][i].tagName=="DIV") //catches 2 gallerylayer divs, gallerystatus div

                            slideshow.setting[k][i].innerHTML=null

                        slideshow.setting[k][i]=null

                    }

                }

            })

            slideshow=slideshow.setting=null

        })

    })

}



fadeSlideShow.prototype={



    navigate:function(keyword){

        var setting=this.setting

        clearTimeout(setting.playtimer)

        if (setting.displaymode.type=="auto"){ //in auto mode

            setting.displaymode.type="manual" //switch to "manual" mode when nav buttons are clicked on

            setting.displaymode.wraparound=true //set wraparound option to true

        }

        if (!isNaN(parseInt(keyword))){ //go to specific slide?

            this.showslide(parseInt(keyword))

        }

        else if (/(prev)|(next)/i.test(keyword)){ //go back or forth inside slide?

            this.showslide(keyword.toLowerCase())

        }

    },



    showslide:function(keyword){

        var slideshow=this

        var setting=slideshow.setting

        if (setting.displaymode.type=="auto" && setting.ismouseover && setting.currentstep<=setting.totalsteps){ //if slideshow in autoplay mode and mouse is over it, pause it

            setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)

            return

        }

        var totalimages=setting.imagearray.length

        var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)

            : (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)

            : Math.min(keyword, totalimages-1)

        var $slideimage=setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show() //hide all images except current one

        var imgdimensions=[$slideimage.width(), $slideimage.height()] //center align image

        $slideimage.css({marginLeft: (imgdimensions[0]>0 && imgdimensions[0]<setting.dimensions[0])? setting.dimensions[0]/2-imgdimensions[0]/2 : 0})

        $slideimage.css({marginTop: (imgdimensions[1]>0 && imgdimensions[1]<setting.dimensions[1])? setting.dimensions[1]/2-imgdimensions[1]/2 : 0})

        setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0}) //background layer becomes foreground

            .stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function(){ //Callback function after fade animation is complete:

                clearTimeout(setting.playtimer)

                try{

                    setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)

                }catch(e){

                    alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)

                }

                setting.currentstep+=1

                if (setting.displaymode.type=="auto"){

                    if (setting.currentstep<=setting.totalsteps || setting.displaymode.cycles==0)

                        setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)

                }

            }) //end callback function

        setting.$gallerylayers.eq(setting.fglayer).css({zIndex:999}) //foreground layer becomes background

        setting.fglayer=setting.bglayer

        setting.bglayer=(setting.bglayer==0)? 1 : 0

        setting.curimage=imgindex

        if (setting.$descpanel)

            setting.$descpanel.css({visibility:(setting.imagearray[imgindex][3])? 'visible' : 'hidden'})

        if (setting.imagearray[imgindex][3])

            setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3])

        if (setting.displaymode.type=="manual" && !setting.displaymode.wraparound){

            this.paginatecontrol()

        }

        if (setting.$status) //if status container defined

            setting.$status.html(setting.curimage+1 + "/" + totalimages)

    },



    showhidedescpanel:function(state, showcontrol){

        var setting=this.setting

        var endpoint=(state=="show")? setting.dimensions[1]-setting.panelheight : this.setting.dimensions[1]

        setting.$descpanel.stop().animate({top:endpoint}, fadeSlideShow_descpanel.slidespeed, function(){

            if (setting.descreveal=="always" && state=="hide")

                setting.$restorebutton.css({visibility:'visible'}) //show restore button

        })

    },



    paginateinit:function($){

        var slideshow=this

        var setting=this.setting

        if (setting.togglerid){ //if toggler div defined

            setting.$togglerdiv=$("#"+setting.togglerid)

            setting.$prev=setting.$togglerdiv.find('.prev').data('action', 'prev')

            setting.$next=setting.$togglerdiv.find('.next').data('action', 'next')

            setting.$prev.add(setting.$next).click(function(e){ //assign click behavior to prev and next controls

                var $target=$(this)

                slideshow.navigate($target.data('action'))

                e.preventDefault()

            })

            setting.$status=setting.$togglerdiv.find('.status')

        }

    },



    paginatecontrol:function(){

        var setting=this.setting

            setting.$prev.css({opacity:(setting.curimage==0)? 0.4 : 1}).data('action', (setting.curimage==0)? 'none' : 'prev')

            setting.$next.css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1}).data('action', (setting.curimage==setting.imagearray.length-1)? 'none' : 'next')

            if (document.documentMode==8){ //in IE8 standards mode, apply opacity to inner image of link

                setting.$prev.find('img:eq(0)').css({opacity:(setting.curimage==0)? 0.4 : 1})

                setting.$next.find('img:eq(0)').css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1})

            }

    }



    

}



fadeSlideShow.routines={



    getSlideHTML:function(imgelement){

        var layerHTML=(imgelement[1])? '<a href="'+imgelement[1]+'" target="'+imgelement[2]+'">\n' : '' //hyperlink slide?

        layerHTML+='<img src="'+imgelement[0]+'" style="border-width:0;" />\n'

        layerHTML+=(imgelement[1])? '</a>\n' : ''

        return layerHTML //return HTML for this layer

    },



    getFullHTML:function(imagearray){

        var preloadhtml=''

        for (var i=0; i<imagearray.length; i++)

            preloadhtml+=this.getSlideHTML(imagearray[i])

        return preloadhtml

    },



    adddescpanel:function($, setting){

        setting.$descpanel=$('<div class="fadeslidedescdiv"></div>')

            .css({position:'absolute', visibility:'hidden', width:'100%', left:0, top:setting.dimensions[1], font:fadeSlideShow_descpanel.fontStyle, zIndex:'1001'})

            .appendTo(setting.$wrapperdiv)

        $('<div class="descpanelbg"></div><div class="descpanelfg"></div>') //create inner nav panel DIVs

            .css({position:'absolute', left:0, top:0, width:setting.$descpanel.width()-8, padding:'4px'})

            .eq(0).css({background:'black', opacity:0.7}).end() //"descpanelbg" div

            .eq(1).css({color:'white'}).html(setting.closebutton + setting.longestdesc).end() //"descpanelfg" div

            .appendTo(setting.$descpanel)

        setting.$descinner=setting.$descpanel.find('div.descpanelfg')

        setting.panelheight=setting.$descinner.outerHeight()

        setting.$descpanel.css({height:setting.panelheight}).find('div').css({height:'100%'})

        if (setting.descreveal=="always"){ //create restore button

            setting.$restorebutton=$('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] +'" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:1002;width:'+fadeSlideShow_descpanel.controls[1][1]+'px;height:'+fadeSlideShow_descpanel.controls[1][2]+'px;cursor:pointer;cursor:hand" />')

                .appendTo(setting.$wrapperdiv)





        }

    },





    getCookie:function(Name){ 

        var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair

        if (document.cookie.match(re)) //if cookie found

            return document.cookie.match(re)[0].split("=")[1] //return its value

        return null

    },



    setCookie:function(name, value){

        document.cookie = name+"=" + value + ";path=/"

    }

}