Kiểu bài đăng phổ biến có các thumbnai (img của picasa,blogger) dạng hàng ngang có nút bấm 2 đầu để tiến lù như hình.
Bước 1:
Thêm đoạn mã dưới đây vào trước thẻ ]]></b:skin> trong template của bạn.
#gallery{-moz-box-shadow:0 2px 7px #555;-webkit-box-shadow:0 2px 7px #555;box-shadow:0px 2px 7px #555;-moz-border-radius:10px;-webkit-border-radius:10px;border-radius:10px;position:relative;margin:0 35px 20px;width:540px;height:126px;background:#F4F4F4}
#gallery .belt{position:absolute;top:0;left:0;list-style-type:none}
#gallery .panel{float:left;margin:20px;width:84px;height:86px;background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguzNJjgLH2mMwgpi9MBDFA-n3K5EfSierq9_XQLa44GP10JPK5KuVKiks3JPIL9qWCsOF0g6kEMB9g-vgBVnIfOEWJNWLh_5hmrUFiSY_NwTiHzgZaumKFNvDdaspYodgnSVOn43Pxezjp/) bottom center no-repeat;overflow:hidden}
#gallery .panel img{float:left;border:1px solid #DDD;margin:5px;width:72px;height:72px;background:#FFF;padding:0px}
#gallery .panel img:hover{filter:alpha(opacity=50);-moz-opacity:0.5;-khtml-opacity:0.5;opacity:0.5}
Bước 2:
Thêm đoạn mã dưới đây vào trước thẻ </head>.
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js' type='text/javascript'></script>
<script src='http://duyphaminfo.googlecode.com/svn/trunk/auto-slider.js' type='text/javascript'></script>
<script type='text/javascript'>
//<![CDATA[
stepcarousel.setup({
galleryid: "gallery",
beltclass: "belt",
panelclass: "panel",
autostep: {enable:true, moveby:1, pause:6000},
panelbehavior: {speed:500, wraparound:true, persist:true},
defaultbuttons: {enable: true, moveby: 2, leftnav: ["https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPi6BD24Ya9TStZNco_3dAsAnw7NALTzms9cNbMoUG5galPcOhMEo7qlmfdfkpKP4kjKr-f0jOczaGNsIjBHzpdgSe44gaZ6ABuFpj0RK506Wj-Aa-vOvcvxEtyZuw3wQ-4VwnnS86u6Qt/", -40, 36], rightnav: ["https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOGUn41S0MvfOk0kgte5SvpgZ13wdTbilWeB7EZgCYFyLtxbDdSQE-dKXF-tA1E2TLIAoHwRT7JildKZzcvuqJwuHRHAOkAp9r6gtdA2M6cAwSnP1gETRKTi3_DAmYGapbn_i-U1mQ5_q2/", 2, 36]},
contenttype: ["external"]
})
//]]>
</script>
Bước 3:
Tìm thẻ <b:section class='main' id='main' showaddelement='yes'/> hoặc <b:section class='main' id='main' showaddelement='no'/> và thêm vào sau nó đoạn mã dưới đây:
<b:widget id='PopularPosts2' locked='false' title='' type='PopularPosts'>
<b:includable id='main'>
<div id='gallery'>
<ul class='belt'>
<b:loop values='data:posts' var='post'>
<li class='panel'>
<b:if cond='data:showThumbnails == "false"'>
<b:if cond='data:showSnippets == "false"'>
<a expr:href='data:post.href' rel='bookmark' expr:title='data:post.title'><data:post.title/></a>
<b:else/>
<div class='item-title'>
<a expr:href='data:post.href' rel='bookmark' expr:title='data:post.title'><data:post.title/></a>
</div>
<div class='item-snippet'>
<data:post.snippet/>
</div>
</b:if>
<b:else/>
<a expr:href='data:post.href' rel='bookmark' expr:title='data:post.title'>
<b:if cond='data:post.thumbnail'>
<img expr:alt='data:post.title' expr:src='data:post.thumbnail'/>
<b:else/>
<img alt='no image' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBOl8Sg6AOMjkULgieR3aYJM74gL5ATKDV-SYZ90s8-PRMrkrUHNscXdph5Zhyphenhyphen1Hq3JpLACdDR-Gd1ifTdpUrbQg6aQTMDuZTD1uI4WXw0AwLM9nyqEpzc_Koo-_p1TXlefe1LL16CZT6t/'/>
</b:if>
</a>
</b:if>
</li>
</b:loop>
</ul>
</div>
</b:includable>
</b:widget>
Bước 4:
Chuyển qua tab Phần tử trang và chọn chỉnh sửa widget PopularPost2 vừa tạo ở Bước 3. Phần Hiển thị chọn hình ảnh thu nhỏ và Hiển thị tối đa 10 bài đăng.
Lưu thiết lập và xem thành quả.
Thanks blog.duypham.info
ThêmSử dụng css + js như cũ để áp dụng vào các bài viết tùy ý thì sử dụng đoạn code sau:
<div id='gallery'>
<ul class='belt'>
<li class='panel'><a href='url-bai-viet-1.html' title='title bai viet 1'><img src='anh-bai-viet-1.png'/></a></li>
<li class='panel'><a href='url-bai-viet-2.html' title='title bai viet 2'><img src='anh-bai-viet-2.png'/></a></li>
</ul>
</div>
Xem thêm nội dung file auto-slider.js nếu bạn muốn tham khảo hiệu ứng chuyển động này
//Step Carousel Viewer: By Dynamic Drive, at http://www.dynamicdrive.com
//** Created: March 19th, 08'
//** Aug 16th, 08'- Updated to v 1.4:
//1) Adds ability to set speed/duration of panel animation (in milliseconds)
//2) Adds persistence support, so the last viewed panel is recalled when viewer returns within same browser session
//3) Adds ability to specify whether panels should stop at the very last and first panel, or wrap around and start all over again
//4) Adds option to specify two navigational image links positioned to the left and right of the Carousel Viewer to move the panels back and forth
//** Aug 27th, 08'- Nav buttons (if enabled) also repositions themselves now if window is resized
//** Sept 23rd, 08'- Updated to v 1.6:
//1) Carousel now stops at the very last visible panel, instead of the last panel itself. In other words, no more white space at the end.
//2) Adds ability for Carousel to auto rotate dictated by the new parameter: autostep: {enable:true, moveby:1, pause:3000}
//2i) During Auto Rotate, Carousel pauses onMouseover, resumes onMouseout. Clicking Carousel halts auto rotate.
//** Oct 22nd, 08'- Updated to v 1.6.1, which fixes functions stepBy() and stepTo() not stopping auto stepping of Carousel when called.
var stepcarousel = {
ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="ajaxloadr.gif" style="vertical-align: middle" /> Fetching Content. Please wait...</div>', //customize HTML to show while fetching Ajax content
defaultbuttonsfade: 0.4, //Fade degree for disabled nav buttons (0=completely transparent, 1=completely opaque)
configholder: {},
getCSSValue: function (val) { //Returns either 0 (if val contains 'auto') or val as an integer
return (val == "auto") ? 0 : parseInt(val)
},
getremotepanels: function ($, config) { //function to fetch external page containing the panel DIVs
config.$belt.html(this.ajaxloadingmsg)
$.ajax({
url: config.contenttype[1], //path to external content
async: true,
error: function (ajaxrequest) {
config.$belt.html('Error fetching content.<br />Server Response: ' + ajaxrequest.responseText)
},
success: function (content) {
config.$belt.html(content)
config.$panels = config.$gallery.find('.' + config.panelclass)
stepcarousel.alignpanels($, config)
}
})
},
getoffset: function (what, offsettype) {
return (what.offsetParent) ? what[offsettype] + this.getoffset(what.offsetParent, offsettype) : what[offsettype]
},
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
},
fadebuttons: function (config, currentpanel) {
config.$leftnavbutton.fadeTo('fast', currentpanel == 0 ? this.defaultbuttonsfade : 1)
config.$rightnavbutton.fadeTo('fast', currentpanel == config.lastvisiblepanel ? this.defaultbuttonsfade : 1)
},
addnavbuttons: function (config, currentpanel) {
config.$leftnavbutton = jQuery('<img src="' + config.defaultbuttons.leftnav[0] + '">')
.css({
zIndex: 50,
position: 'absolute',
left: config.offsets.left + config.defaultbuttons.leftnav[1] + 'px',
top: config.offsets.top + config.defaultbuttons.leftnav[2] + 'px',
cursor: 'hand',
cursor: 'pointer'
})
.attr({
title: 'Back ' + config.defaultbuttons.moveby + ' panels'
})
.appendTo('body')
config.$rightnavbutton = jQuery('<img src="' + config.defaultbuttons.rightnav[0] + '">')
.css({
zIndex: 50,
position: 'absolute',
left: config.offsets.left + config.$gallery.get(0)
.offsetWidth + config.defaultbuttons.rightnav[1] + 'px',
top: config.offsets.top + config.defaultbuttons.rightnav[2] + 'px',
cursor: 'hand',
cursor: 'pointer'
})
.attr({
title: 'Forward ' + config.defaultbuttons.moveby + ' panels'
})
.appendTo('body')
config.$leftnavbutton.bind('click', function () { //assign nav button event handlers
stepcarousel.stepBy(config.galleryid, -config.defaultbuttons.moveby)
})
config.$rightnavbutton.bind('click', function () { //assign nav button event handlers
stepcarousel.stepBy(config.galleryid, config.defaultbuttons.moveby)
})
if (config.panelbehavior.wraparound == false) { //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
this.fadebuttons(config, currentpanel)
}
return config.$leftnavbutton.add(config.$rightnavbutton)
},
stopautostep: function (config) {
clearTimeout(config.steptimer)
clearTimeout(config.resumeautostep)
},
alignpanels: function ($, config) {
var paneloffset = 0
config.paneloffsets = [paneloffset] //array to store upper left offset of each panel (1st element=0)
config.panelwidths = [] //array to store widths of each panel
config.$panels.each(function (index) { //loop through panels
var $currentpanel = $(this)
$currentpanel.css({
float: 'none',
position: 'absolute',
left: paneloffset + 'px'
}) //position panel
$currentpanel.bind('click', function (e) {
return config.onpanelclick(e.target)
}) //bind onpanelclick() to onclick event
paneloffset += stepcarousel.getCSSValue($currentpanel.css('marginRight')) + parseInt($currentpanel.get(0)
.offsetWidth || $currentpanel.css('width')) //calculate next panel offset
config.paneloffsets.push(paneloffset) //remember this offset
config.panelwidths.push(paneloffset - config.paneloffsets[config.paneloffsets.length - 2]) //remember panel width
})
config.paneloffsets.pop() //delete last offset (redundant)
var addpanelwidths = 0
var lastpanelindex = config.$panels.length - 1
config.lastvisiblepanel = lastpanelindex
for (var i = config.$panels.length - 1; i >= 0; i--) {
addpanelwidths += (i == lastpanelindex ? config.panelwidths[lastpanelindex] : config.paneloffsets[i + 1] - config.paneloffsets[i])
if (config.gallerywidth > addpanelwidths) {
config.lastvisiblepanel = i //calculate index of panel that when in 1st position reveals the very last panel all at once based on gallery width
}
}
config.$belt.css({
width: paneloffset + 'px'
}) //Set Belt DIV to total panels' widths
config.currentpanel = (config.panelbehavior.persist) ? parseInt(this.getCookie(window[config.galleryid + "persist"])) : 0 //determine 1st panel to show by default
config.currentpanel = (typeof config.currentpanel == "number" && config.currentpanel < config.$panels.length) ? config.currentpanel : 0
if (config.currentpanel != 0) {
var endpoint = config.paneloffsets[config.currentpanel] + (config.currentpanel == 0 ? 0 : config.beltoffset)
config.$belt.css({
left: -endpoint + 'px'
})
}
if (config.defaultbuttons.enable == true) { //if enable default back/forth nav buttons
var $navbuttons = this.addnavbuttons(config, config.currentpanel)
$(window)
.bind("load resize", function () { //refresh position of nav buttons when page loads/resizes, in case offsets weren't available document.oncontentload
config.offsets = {
left: stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"),
top: stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")
}
config.$leftnavbutton.css({
left: config.offsets.left + config.defaultbuttons.leftnav[1] + 'px',
top: config.offsets.top + config.defaultbuttons.leftnav[2] + 'px'
})
config.$rightnavbutton.css({
left: config.offsets.left + config.$gallery.get(0)
.offsetWidth + config.defaultbuttons.rightnav[1] + 'px',
top: config.offsets.top + config.defaultbuttons.rightnav[2] + 'px'
})
})
}
if (config.autostep && config.autostep.enable) { //enable auto stepping of Carousel? var $carouselparts = config.$gallery.add(typeof $navbuttons != "undefined" ? $navbuttons : null)
$carouselparts.bind('click', function () {
stepcarousel.stopautostep(config)
config.autostep.status = "stopped"
})
$carouselparts.hover(function () { //onMouseover
stepcarousel.stopautostep(config)
config.autostep.hoverstate = "over"
}, function () { //onMouseout
if (config.steptimer && config.autostep.hoverstate == "over" && config.autostep.status != "stopped") {
config.resumeautostep = setTimeout(function () {
stepcarousel.autorotate(config.galleryid)
config.autostep.hoverstate = "out"
}, 500)
}
})
config.steptimer = setTimeout(function () {
stepcarousel.autorotate(config.galleryid)
}, config.autostep.pause) //automatically rotate Carousel Viewer
} //end enable auto stepping check
this.statusreport(config.galleryid)
config.oninit()
config.onslideaction(this)
},
stepTo: function (galleryid, pindex) { /*User entered pindex starts at 1 for intuitiveness. Internally pindex still starts at 0 */
var config = stepcarousel.configholder[galleryid]
if (typeof config == "undefined") {
alert("There's an error with your set up of Carousel Viewer \"" + galleryid + "\"!")
return
}
stepcarousel.stopautostep(config)
var pindex = Math.min(pindex - 1, config.paneloffsets.length - 1)
var endpoint = config.paneloffsets[pindex] + (pindex == 0 ? 0 : config.beltoffset)
if (config.panelbehavior.wraparound == false && config.defaultbuttons.enable == true) { //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
this.fadebuttons(config, pindex)
}
config.$belt.animate({
left: -endpoint + 'px'
}, config.panelbehavior.speed, function () {
config.onslideaction(this)
})
config.currentpanel = pindex
this.statusreport(galleryid)
},
stepBy: function (galleryid, steps) { //isauto if defined indicates stepBy() is being called automatically
var config = stepcarousel.configholder[galleryid]
if (typeof config == "undefined") {
alert("There's an error with your set up of Carousel Viewer \"" + galleryid + "\"!")
return
}
stepcarousel.stopautostep(config)
var direction = (steps > 0) ? 'forward' : 'back' //If "steps" is negative, that means backwards
var pindex = config.currentpanel + steps //index of panel to stop at
if (config.panelbehavior.wraparound == false) { //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
pindex = (direction == "back" && pindex <= 0) ? 0 : (direction == "forward") ? Math.min(pindex, config.lastvisiblepanel) : pindex
if (config.defaultbuttons.enable == true) { //if default nav buttons are enabled, fade them in and out depending on if at start or end of carousel
stepcarousel.fadebuttons(config, pindex)
}
} else { //else, for normal stepBy behavior
if (pindex > config.lastvisiblepanel && direction == "forward") {
//if destination pindex is greater than last visible panel, yet we're currently not at the end of the carousel yet
pindex = (config.currentpanel < config.lastvisiblepanel) ? config.lastvisiblepanel : 0
} else if (pindex < 0 && direction == "back") {
//if destination pindex is less than 0, yet we're currently not at the beginning of the carousel yet
pindex = (config.currentpanel > 0) ? 0 : config.lastvisiblepanel /*wrap around left*/
}
}
var endpoint = config.paneloffsets[pindex] + (pindex == 0 ? 0 : config.beltoffset) //left distance for Belt DIV to travel to
if (pindex == 0 && direction == 'forward' || config.currentpanel == 0 && direction == 'back' && config.panelbehavior.wraparound == true) { //decide whether to apply "push pull" effect
config.$belt.animate({
left: -config.paneloffsets[config.currentpanel] - (direction == 'forward' ? 100 : -30) + 'px'
}, 'normal', function () {
config.$belt.animate({
left: -endpoint + 'px'
}, config.panelbehavior.speed, function () {
config.onslideaction(this)
})
})
} else
config.$belt.animate({
left: -endpoint + 'px'
}, config.panelbehavior.speed, function () {
config.onslideaction(this)
})
config.currentpanel = pindex
this.statusreport(galleryid)
},
autorotate: function (galleryid) {
var config = stepcarousel.configholder[galleryid]
if (config.$gallery.attr('_ismouseover') != "yes") {
this.stepBy(galleryid, config.autostep.moveby)
}
config.steptimer = setTimeout(function () {
stepcarousel.autorotate(galleryid)
}, config.autostep.pause)
},
statusreport: function (galleryid) {
var config = stepcarousel.configholder[galleryid]
var startpoint = config.currentpanel //index of first visible panel
var visiblewidth = 0
for (var endpoint = startpoint; endpoint < config.paneloffsets.length; endpoint++) { //index (endpoint) of last visible panel
visiblewidth += config.panelwidths[endpoint]
if (visiblewidth > config.gallerywidth) {
break
}
}
startpoint += 1 //format startpoint for user friendiness
endpoint = (endpoint + 1 == startpoint) ? startpoint : endpoint //If only one image visible on the screen and partially hidden, set endpoint to startpoint
var valuearray = [startpoint, endpoint, config.panelwidths.length]
for (var i = 0; i < config.statusvars.length; i++) {
window[config.statusvars[i]] = valuearray[i] //Define variable (with user specified name) and set to one of the status values
config.$statusobjs[i].text(valuearray[i] + " ") //Populate element on page with ID="user specified name" with one of the status values
}
},
setup: function (config) {
//Disable Step Gallery scrollbars ASAP dynamically (enabled for sake of users with JS disabled)
document.write('<style type="text/css">\n#' + config.galleryid + '{overflow: hidden;}\n</style>')
jQuery(document)
.ready(function ($) {
config.$gallery = $('#' + config.galleryid)
config.gallerywidth = config.$gallery.width()
config.offsets = {
left: stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"),
top: stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")
}
config.$belt = config.$gallery.find('.' + config.beltclass) //Find Belt DIV that contains all the panels
config.$panels = config.$gallery.find('.' + config.panelclass) //Find Panel DIVs that each contain a slide
config.panelbehavior.wraparound = (config.autostep && config.autostep.enable) ? true : config.panelbehavior.wraparound //if auto step enabled, set "wraparound" to true
config.onpanelclick = (typeof config.onpanelclick == "undefined") ? function (target) {} : config.onpanelclick //attach custom "onpanelclick" event handler
config.onslideaction = (typeof config.onslide == "undefined") ? function () {} : function (beltobj) {
$(beltobj)
.stop();
config.onslide()
} //attach custom "onslide" event handler
config.oninit = (typeof config.oninit == "undefined") ? function () {} : config.oninit //attach custom "oninit" event handler
config.beltoffset = stepcarousel.getCSSValue(config.$belt.css('marginLeft')) //Find length of Belt DIV's left margin
config.statusvars = config.statusvars || [] //get variable names that will hold "start", "end", and "total" slides info
config.$statusobjs = [$('#' + config.statusvars[0]), $('#' + config.statusvars[1]), $('#' + config.statusvars[2])]
config.currentpanel = 0
stepcarousel.configholder[config.galleryid] = config //store config parameter as a variable
if (config.contenttype[0] == "ajax" && typeof config.contenttype[1] != "undefined") //fetch ajax content?
stepcarousel.getremotepanels($, config)
else
stepcarousel.alignpanels($, config) //align panels and initialize gallery
}) //end document.ready
jQuery(window)
.bind('unload', function () { //clean up
if (config.panelbehavior.persist) {
stepcarousel.setCookie(window[config.galleryid + "persist"], config.currentpanel)
}
jQuery.each(config, function (ai, oi) {
oi = null
})
config = null
})
}
}
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