jQuery幻燈片相簿JS效果
使用css樣式，我們已經把上圖右下角的圖示加了上去，但是想要實現控制效果，我們需要使用JS來實現，程式碼如下
<script type="text/javascript">
$(function() {
/**
* interval : 显示的图像之间的时间
* current : 控制当前图像的数量
* current_thumb : 该指数目前的拇指包装
* nmb_thumb_wrappers : 拇指包装总数
* nmb_images_wrapper : 图像的数量在每个包装器
*/
var interval = 4000;
var current = 0;
var current_thumb = 0;
var nmb_thumb_wrappers = $('#msg_thumbs .msg_thumb_wrapper').length;
var nmb_images_wrapper = 6;
/**
* 启动幻灯片
*/
play();
/**
* 显示控制时
* 鼠标移至画面
*/
slideshowMouseEvent();
function slideshowMouseEvent(){
$('#msg_slideshow').unbind('mouseenter')
.bind('mouseenter',showControls)
.andSelf()
.unbind('mouseleave')
.bind('mouseleave',hideControls);
}
/**
* 点击网格图标
* 显示了拇指视图、暂停幻灯片和隐藏控件
*/
$('#msg_grid').bind('click',function(e){
hideControls();
$('#msg_slideshow').unbind('mouseenter').unbind('mouseleave');
pause();
$('#msg_thumbs').stop().animate({'top':'0px'},500);
e.preventDefault();
});
/**
* 关闭拇指视图,
* 显示控件
*/
$('#msg_thumb_close').bind('click',function(e){
showControls();
slideshowMouseEvent();
$('#msg_thumbs').stop().animate({'top':'-230px'},500);
e.preventDefault();
});
/**
* 暂停或播放图标
*/
$('#msg_pause_play').bind('click',function(e){
var $this = $(this);
if($this.hasClass('msg_play'))
play();
else
pause();
e.preventDefault();
});
/**
* 点击控制下或上一页,
* 暂停幻灯片,
* 显示下一个图像
*/
$('#msg_next').bind('click',function(e){
pause();
next();
e.preventDefault();
});
$('#msg_prev').bind('click',function(e){
pause();
prev();
e.preventDefault();
});
/**
* 显示和隐藏控件功能
*/
function showControls(){
$('#msg_controls').stop().animate({'right':'15px'},500);
}
function hideControls(){
$('#msg_controls').stop().animate({'right':'-110px'},500);
}
/**
* 启动幻灯片
*/
function play(){
next();
$('#msg_pause_play').addClass('msg_pause').removeClass('msg_play');
playtime = setInterval(next,interval)
}
/**
* 停止幻灯片
*/
function pause(){
$('#msg_pause_play').addClass('msg_play').removeClass('msg_pause');
clearTimeout(playtime);
}
/**
* 显示下一个图像
*/
function next(){
++current;
showImage('r');
}
/**
* 显示之前的图像
*/
function prev(){
--current;
showImage('l');
}
/**
* 显示一个图像
* dir:左或右
*/
function showImage(dir){
/**
* 拇指包装所示,总是包含当前图像的一个
*/
alternateThumbs();
/**
* 将显示在full模式的经验
*/
var $thumb = $('#msg_thumbs .msg_thumb_wrapper:nth-child('+current_thumb+')')
.find('a:nth-child('+ parseInt(current - nmb_images_wrapper*(current_thumb -1)) +')')
.find('img');
if($thumb.length){
var source = $thumb.attr('alt');
var $currentImage = $('#msg_wrapper').find('img');
if($currentImage.length){
$currentImage.fadeOut(function(){
$(this).remove();
$('<img />').load(function(){
var $image = $(this);
resize($image);
$image.hide();
$('#msg_wrapper').empty().append($image.fadeIn());
}).attr('src',source);
});
}
else{
$('<img />').load(function(){
var $image = $(this);
resize($image);
$image.hide();
$('#msg_wrapper').empty().append($image.fadeIn());
}).attr('src',source);
}
}
else{ //this is actually not necessary since we have a circular slideshow
if(dir == 'r')
--current;
else if(dir == 'l')
++current;
alternateThumbs();
return;
}
}
/**
*拇指包装所示,总是包含当前图像的一个
*/
function alternateThumbs(){
$('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+current_thumb+')')
.hide();
current_thumb = Math.ceil(current/nmb_images_wrapper);
/**
* 如果到达最后,重新开开始
*/
if(current_thumb > nmb_thumb_wrappers){
current_thumb = 1;
current = 1;
}
/**
* 如果我们点击,则结束
*/
else if(current_thumb == 0){
current_thumb = nmb_thumb_wrappers;
current = current_thumb*nmb_images_wrapper;
}
$('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+current_thumb+')')
.show();
}
/**
* 单击下一个或前拇指包装
*/
$('#msg_thumb_next').bind('click',function(e){
next_thumb();
e.preventDefault();
});
$('#msg_thumb_prev').bind('click',function(e){
prev_thumb();
e.preventDefault();
});
function next_thumb(){
var $next_wrapper = $('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+parseInt(current_thumb+1)+')');
if($next_wrapper.length){
$('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+current_thumb+')')
.fadeOut(function(){
++current_thumb;
$next_wrapper.fadeIn();
});
}
}
function prev_thumb(){
var $prev_wrapper = $('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+parseInt(current_thumb-1)+')');
if($prev_wrapper.length){
$('#msg_thumbs').find('.msg_thumb_wrapper:nth-child('+current_thumb+')')
.fadeOut(function(){
--current_thumb;
$prev_wrapper.fadeIn();
});
}
}
/**
* 点击一个拇指,显示图像(拇指的alt属性)
*/
$('#msg_thumbs .msg_thumb_wrapper > a').bind('click',function(e){
var $this = $(this);
$('#msg_thumb_close').trigger('click');
var idx = $this.index();
var p_idx = $this.parent().index();
current = parseInt(p_idx*nmb_images_wrapper + idx + 1);
showImage();
e.preventDefault();
}).bind('mouseenter',function(){
var $this = $(this);
$this.stop().animate({'opacity':1});
}).bind('mouseleave',function(){
var $this = $(this);
$this.stop().animate({'opacity':0.5});
});
/**
* 调整,以适应图像在容器(400 x 400)
*/
function resize($image){
var theImage = new Image();
theImage.src = $image.attr("src");
var imgwidth = theImage.width;
var imgheight = theImage.height;
var containerwidth = 400;
var containerheight = 400;
if(imgwidth > containerwidth){
var newwidth = containerwidth;
var ratio = imgwidth / containerwidth;
var newheight = imgheight / ratio;
if(newheight > containerheight){
var newnewheight = containerheight;
var newratio = newheight/containerheight;
var newnewwidth =newwidth/newratio;
theImage.width = newnewwidth;
theImage.height= newnewheight;
}
else{
theImage.width = newwidth;
theImage.height= newheight;
}
}
else if(imgheight > containerheight){
var newheight = containerheight;
var ratio = imgheight / containerheight;
var newwidth = imgwidth / ratio;
if(newwidth > containerwidth){
var newnewwidth = containerwidth;
var newratio = newwidth/containerwidth;
var newnewheight =newheight/newratio;
theImage.height = newnewheight;
theImage.width= newnewwidth;
}
else{
theImage.width = newwidth;
theImage.height= newheight;
}
}
$image.css({
'width' :theImage.width,
'height':theImage.height
});
}
});
</script>提示：對於上面的JS程式碼，對於新手不需要會寫，只要能按照註解看懂會用即可
下面我們把程式碼融合一下
