1// ------------------------------------------------------------------- 2// Image Thumbnail Viewer Script- By Dynamic Drive, available at: http://www.dynamicdrive.com 3// Last updated: Jan 22nd, 2007 4// ------------------------------------------------------------------- 5 6var thumbnailviewer={ 7enableTitle: true, //Should "title" attribute of link be used as description? 8enableAnimation: true, //Enable fading animation? 9definefooter: '<div class="footerbar">CLOSE X</div>', //Define HTML for footer interface 10defineLoading: '<img src="loading.gif" /> Loading Image...', //Define HTML for "loading" div 11 12/////////////No need to edit beyond here///////////////////////// 13 14scrollbarwidth: 16, 15opacitystring: 'filter:progid:DXImageTransform.Microsoft.alpha(opacity=10); -moz-opacity: 0.1; opacity: 0.1', 16targetlinks:[], //Array to hold links with rel="thumbnail" 17 18createthumbBox:function(){ 19//write out HTML for Image Thumbnail Viewer plus loading div 20document.write('<div id="thumbBox" onClick="thumbnailviewer.closeit()"><div id="thumbImage"></div>'+this.definefooter+'</div>')
21document.write('<div id="thumbLoading">'+this.defineLoading+'</div>') 22this.thumbBox=document.getElementById("thumbBox") 23this.thumbImage=document.getElementById("thumbImage") //Reference div that holds the shown image 24this.thumbLoading=document.getElementById("thumbLoading") //Reference "loading" div that will be shown while image is fetched 25this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes 26}, 27 28 29centerDiv:function(divobj){ //Centers a div element on the page 30var ie=document.all && !window.opera 31var dom=document.getElementById 32var scroll_top=(ie)? this.standardbody.scrollTop : window.pageYOffset 33var scroll_left=(ie)? this.standardbody.scrollLeft : window.pageXOffset 34var docwidth=(ie)? this.standardbody.clientWidth : window.innerWidth-this.scrollbarwidth 35var docheight=(ie)? this.standardbody.clientHeight: window.innerHeight 36var docheightcomplete=(this.standardbody.offsetHeight>this.standardbody.scrollHeight)? this.standardbody.offsetHeight : this.standardbody.scrollHeight //Full scroll height of document 37var objwidth=divobj.offsetWidth //width of div element 38var objheight=divobj.offsetHeight //height of div element 39var topposition=(docheight>objheight)? scroll_top+docheight/2-objheight/2+"px" : scroll_top+10+"px" //Vertical position of div element: Either centered, or if element height larger than viewpoint height, 10px from top of viewpoint 40divobj.style.left=docwidth/2-objwidth/2+"px" //Center div element horizontally 41divobj.style.top=Math.floor(parseInt(topposition))+"px" 42divobj.style.visibility="visible" 43}, 44 45showthumbBox:function(){ //Show ThumbBox div 46this.centerDiv(this.thumbBox) 47if (this.enableAnimation){ //If fading animation enabled 48this.currentopacity=0.1 //Starting opacity value 49this.opacitytimer=setInterval("thumbnailviewer.opacityanimation()", 20) 50} 51}, 52 53 54loadimage:function(link){ //Load image function that gets attached to each link on the page with rel="thumbnail" 55if (this.thumbBox.style.visibility=="visible") //if thumbox is visible on the page already 56this.closeit() //Hide it first (not doing so causes triggers some positioning bug in Firefox 57var imageHTML='<img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" />' //Construct HTML for shown image 58if (this.enableTitle && link.getAttribute("title")) //Use title attr of the link as description? 59imageHTML+='<br />'+link.getAttribute("title") 60this.centerDiv(this.thumbLoading) //Center and display "loading" div while we set up the image to be shown 61this.thumbImage.innerHTML=imageHTML //Populate thumbImage div with shown image's HTML (while still hidden) 62this.featureImage=this.thumbImage.getElementsByTagName("img")[0] //Reference shown image itself 63this.featureImage.onload=function(){ //When target image has completely loaded 64thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div 65thumbnailviewer.showthumbBox() //Display "thumbbox" div to the world! 66} 67if (document.all && !window.createPopup) //Target IE5.0 browsers only. Address IE image cache not firing onload bug: panoramio.com/blog/onload-event/ 68this.featureImage.src=link.getAttribute("href") 69this.featureImage.onerror=function(){ //If an error has occurred while loading the image to show 70thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div, game over 71} 72}, 73 74setimgopacity:function(value){ //Sets the opacity of "thumbimage" div per the passed in value setting (0 to 1 and in between) 75var targetobject=this.featureImage 76if (targetobject.filters && targetobject.filters[0]){ //IE syntax 77if (typeof targetobject.filters[0].opacity=="number") //IE6 78targetobject.filters[0].opacity=value*100 79else //IE 5.5 80targetobject.style.filter="alpha(opacity="+value*100+")" 81} 82else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax 83targetobject.style.MozOpacity=value 84else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax 85targetobject.style.opacity=value 86else //Non of the above, stop opacity animation 87this.stopanimation() 88}, 89 90opacityanimation:function(){ //Gradually increase opacity function 91this.setimgopacity(this.currentopacity) 92this.currentopacity+=0.1 93if (this.currentopacity>1) 94this.stopanimation() 95}, 96 97stopanimation:function(){ 98if (typeof this.opacitytimer!="undefined") 99clearInterval(this.opacitytimer) 100}, 101 102 103closeit:function(){ //Close "thumbbox" div function 104this.stopanimation() 105this.thumbBox.style.visibility="hidden" 106this.thumbImage.innerHTML="" 107this.thumbBox.style.left="-2000px" 108this.thumbBox.style.top="-2000px" 109}, 110 111cleanup:function(){ //Clean up routine on page unload 112this.thumbLoading=null 113if (this.featureImage) this.featureImage.onload=null 114this.featureImage=null 115this.thumbImage=null 116for (var i=0; i<this.targetlinks.length; i++) 117this.targetlinks[i].onclick=null 118this.thumbBox=null 119}, 120 121dotask:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload) 122var tasktype=(window.addEventListener)? tasktype : "on"+tasktype 123if (target.addEventListener) 124target.addEventListener(tasktype, functionref, false) 125else if (target.attachEvent) 126target.attachEvent(tasktype, functionref) 127}, 128 129init:function(){ //Initialize thumbnail viewer script by scanning page and attaching appropriate function to links with rel="thumbnail" 130if (!this.enableAnimation) 131this.opacitystring="" 132var pagelinks=document.getElementsByTagName("a") 133for (var i=0; i<pagelinks.length; i++){ //BEGIN FOR LOOP 134if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail"){ //Begin if statement 135pagelinks[i].onclick=function(){ 136thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding 137thumbnailviewer.loadimage(this) //Load image 138return false 139} 140this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link 141} //end if statement 142} //END FOR LOOP 143//Reposition "thumbbox" div when page is resized 144this.dotask(window, function(){if (thumbnailviewer.thumbBox.style.visibility=="visible") thumbnailviewer.centerDiv(thumbnailviewer.thumbBox)}, "resize") 145 146 147} //END init() function 148 149} 150
151thumbnailviewer.createthumbBox() //Output HTML for the image thumbnail viewer 152thumbnailviewer.dotask(window, function(){thumbnailviewer.init()}, "load") //Initialize script on page load 153thumbnailviewer.dotask(window, function(){thumbnailviewer.cleanup()}, "unload")
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