//** DD Drop Down Panel- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Dec 7th, 08'- Script created (Requires jquery 1.2.x)

var simpleGallery_navpanel={
        panel: {height:'45px', opacity:0.5, paddingTop:'5px', fontStyle:'bold 11px Verdana'}, //customize nav panel container
        images: [ '/template/xtemplate001/left.gif', '/template/xtemplate001/play.gif', '/template/xtemplate001/right.gif', '/template/xtemplate001/pause.gif'], //nav panel images (in that order)
        imageSpacing: {offsetTop:[-4, 0, -4], spacing:10}, //top offset of left, play, and right images, PLUS spacing between the 3 images
        slideduration: 500 //duration of slide up animation to reveal panel
}

function simpleGallery(settingarg){
        this.setting=settingarg
        settingarg=null
        var setting=this.setting
        setting.pause=parseInt(setting.pause)
        setting.fadeduration=parseInt(setting.fadeduration)
        setting.curimage=(setting.persist)? simpleGallery.routines.getCookie("gallery-"+setting.wrapperid) : 0
        setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty
        setting.ispaused=!setting.autoplay //ispaused reflects current state of gallery, autoplay indicates whether gallery is set to auto play
        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(){}
        var preloadimages=[] //temp array to preload images
        for (var i=0; i<setting.imagearray.length; i++){
                preloadimages[i]=new Image()
                preloadimages[i].src=setting.imagearray[i][0]
        }
        var slideshow=this
        jQuery(document).ready(function($){
                var setting=slideshow.setting
                setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'black', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main gallery DIV
                if (setting.$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})
                        .appendTo(setting.$wrapperdiv)
                setting.gallerylayers=setting.$gallerylayers.get() //cache stacked DIVs as DOM objects
                setting.navbuttons=simpleGallery.routines.addnavpanel(setting) //get 4 nav buttons DIVs as DOM objects
                $(setting.navbuttons).filter('img.navimages').css({opacity:0.8})
                        .bind('mouseover mouseout', function(e){
                                $(this).css({opacity:(e.type=="mouseover")? 1 : 0.8})
                        })
                        .bind('click', function(e){
                                var keyword=e.target.title.toLowerCase()
                                slideshow.navigate(keyword) //assign behavior to nav images
                        })
                setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidenavpanel('show')})
                setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidenavpanel('hide')})
                slideshow.showslide(setting.curimage) //show initial slide
                setting.oninit() //trigger oninit() event
                $(window).bind('unload', function(){ //clean up and persist
                        $(slideshow.setting.navbuttons).unbind()
                        if (slideshow.setting.persist) //remember last shown image's index
                                simpleGallery.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")
                                                        slideshow.setting[k][i].innerHTML=null
                                                slideshow.setting[k][i]=null
                                        }
                                }
                                slideshow.setting[k]=null
                        })
                        slideshow=slideshow.setting=null
                })
        })
}

simpleGallery.prototype={

        navigate:function(keyword){
                clearTimeout(this.setting.playtimer)
                if (!isNaN(parseInt(keyword))){
                        this.showslide(parseInt(keyword))
                }
                else if (/(prev)|(next)/i.test(keyword)){
                        this.showslide(keyword.toLowerCase())
                }
                else{ //if play|pause button
                        var slideshow=this
                        var $playbutton=$(this.setting.navbuttons).eq(1)
                        if (!this.setting.ispaused){ //if pause Gallery
                                this.setting.autoplay=false
                                $playbutton.attr({title:'Play', src:simpleGallery_navpanel.images[1]})
                        }
                        else if (this.setting.ispaused){ //if play Gallery
                                this.setting.autoplay=true
                                this.setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, this.setting.pause)
                                $playbutton.attr({title:'Pause', src:simpleGallery_navpanel.images[3]})
                        }
                        slideshow.setting.ispaused=!slideshow.setting.ispaused
                }
        },

        showslide:function(keyword){
                var slideshow=this
                var setting=slideshow.setting
                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)
                setting.gallerylayers[setting.bglayer].innerHTML=simpleGallery.routines.getSlideHTML(setting.imagearray[imgindex])
                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)
                                setting.gallerylayers[setting.bglayer].innerHTML=null  //empty bglayer (previously fglayer before setting.fglayer=setting.bglayer was set below)
                                try{
                                        setting.onslide(setting.gallerylayers[setting.fglayer], setting.curimage)
                                }catch(e){
                                        alert("Simple Controls Gallery: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)
                                }
                                if (setting.autoplay){
                                        setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.pause)
                                }
                        })
                setting.gallerylayers[setting.fglayer].style.zIndex=999 //foreground layer becomes background
                setting.fglayer=setting.bglayer
                setting.bglayer=(setting.bglayer==0)? 1 : 0
                setting.curimage=imgindex
                setting.navbuttons[3].innerHTML=(setting.curimage+1) + '/' + setting.imagearray.length
        },

        showhidenavpanel:function(state){
                var setting=this.setting
                var endpoint=(state=="show")? setting.dimensions[1]-parseInt(simpleGallery_navpanel.panel.height) : this.setting.dimensions[1]
                setting.$navpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration)
        }
}

simpleGallery.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" />'
                layerHTML+=(imgelement[1])? '</a>' : ''
                return layerHTML //return HTML for this layer
        },

        addnavpanel:function(setting){
                var interfaceHTML=''
                for (var i=0; i<3; i++){
                        var imgstyle='position:relative; border:0; cursor:hand; cursor:pointer; top:'+simpleGallery_navpanel.imageSpacing.offsetTop[i]+'px; margin-right:'+(i!=2? simpleGallery_navpanel.imageSpacing.spacing+'px' : 0)
                        var title=(i==0? 'Prev' : (i==1)? (setting.ispaused? 'Play' : 'Pause') : 'Next')
                        var imagesrc=(i==1)? simpleGallery_navpanel.images[(setting.ispaused)? 1 : 3] : simpleGallery_navpanel.images[i]
                        interfaceHTML+='<img class="navimages" title="' + title + '" src="'+ imagesrc +'" style="'+imgstyle+'" /> '
                }
                interfaceHTML+='<div class="gallerystatus" style="margin-top:1px">' + (setting.curimage+1) + '/' + setting.imagearray.length + '</div>'
                setting.$navpanel=$('<div class="navpanellayer"></div>')
                        .css({position:'absolute', width:'100%', height:simpleGallery_navpanel.panel.height, left:0, top:setting.dimensions[1], font:simpleGallery_navpanel.panel.fontStyle, zIndex:'1001'})
                        .appendTo(setting.$wrapperdiv)
                $('<div class="navpanellayerbg"></div><div class="navpanellayerfg"></div>')
                        .css({position:'absolute', left:0, top:0, width:'100%', height:'100%'})
                        .eq(0).css({background:'black', opacity:simpleGallery_navpanel.panel.opacity}) //"navpanellayerbg" div
                        .end().eq(1).css({paddingTop:simpleGallery_navpanel.panel.paddingTop, textAlign:'center', color:'white'}).html(interfaceHTML) //"navpanellayerfg" div
                        .end().appendTo(setting.$navpanel)
                return setting.$navpanel.find('img.navimages, div.gallerystatus').get() ////return 4 nav buttons DIVs as DOM objects
        },

        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=/"
        }
}