尝试创建滚动水平缩略图导航，在不使用时隐藏在左侧

Question

我正在尝试重新创建以下类型的滚动缩略图导航，如以下教程中所述：

http://tympanus.net/codrops/2010/05/10/scrollable-thumbs-menu/

我需要我的拇指从左侧水平滑出。我已经尽我所能修改了代码，但我无法让它工作。 （认为​​问题出在jquery的前三分之一处）。

这是我迄今为止所得到的：

HTML

<ul class="menu" id="menu">
    <li>
        <a href="#"></a>
        <div class="sc_menu_wrapper">
            <div class="sc_menu">
                <a href="#"><img src="images/gallery/1.jpg" alt=""/></a>
                <a href="#"><img src="images/gallery/2.jpg" alt=""/></a>
                <a href="#"><img src="images/gallery/3.jpg" alt=""/></a>
                <a href="#"><img src="images/gallery/4.jpg" alt=""/></a>
                <a href="#"><img src="images/gallery/5.jpg" alt=""/></a>
            </div>
        </div>
    </li>
    </ul>

CSS

/* Navigation Style */
ul.menu{
position: fixed;
top: 0px; 
left:0px;
width: 100%;
}

ul.menu li{
position:relative;
width: 100% 
}

ul.menu li > a{
position:absolute;
top:300px;
left:0px;
width:40px;
height:200px;
background-color:#e7e7e8;
}

/* Thumb Scrolling Style */

div.sc_menu_wrapper {
position: absolute;
right: 0px; 
height: 220px;
overflow: hidden;
top: 300px; 
left:0px;
visibility:hidden;
}

div.sc_menu {
height: 200px; 
visibility:hidden;
}

.sc_menu a {
display: block;
background-color:#e7e7e8;
}
.sc_menu img {
display: block;
border: none;
opacity:0.3;
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=30);
}

JQUERY

  $(function(){

      // function to make the thumbs menu scrollable 
            function buildThumbs($elem){
                var $wrapper        = $elem.next();
                var $menu       = $wrapper.find('.sc_menu');
                var inactiveMargin  = 220;

                // move the scroll down to the beggining (move as much as the height of the menu)

                $wrapper.scrollRight($menu.outerHeight());

               //when moving the mouse up or down, the wrapper moves (scrolls) up or down 

                $wrapper.bind('mousemove',function(e){

                    var wrapperWidth    = $wrapper.width();
                    var menuWidth   = $menu.outerWidth() + 2 * inactiveMargin;
                    var top     = (e.pageX - $wrapper.offset().right) * (menuWidth - wrapperWidth) / wrapperWidth - inactiveMargin;

                   $wrapper.scrollRight(right+10);
                });
            }

      var stacktime;

      $('#menu li > a').bind('mouseover',function () {
          var $this = $(this);

          buildThumbs($this);

          var pos   =   $this.next().find('a').size();
          var f =   function(){
              if(pos==0) clearTimeout(stacktime);
              $this.next().find('a:nth-child('+pos+')').css('visibility','visible');
              --pos;
          };

          // each thumb will appear with a delay 
          stacktime = setInterval(f , 50);
      });


      /// on mouseleave of the whole <li> the scrollable area is hidden 
      $('#menu li').bind('mouseleave',function () {
          var $this = $(this);
          clearTimeout(stacktime);
          $this.find('.sc_menu').css('visibility','hidden').find('a').css('visibility','hidden');
          $this.find('.sc_menu_wrapper').css('visibility','hidden');
      });

      // when hovering a thumb, change its opacity 
      $('.sc_menu a').hover(
      function () {
          var $this = $(this);
          $this.find('img')
          .stop()
          .animate({'opacity':'1.0'},400);
      },
      function () {
          var $this = $(this);
          $this.find('img')
          .stop()
          .animate({'opacity':'0.3'},400);
      }
  );
  });

想知道是否有鹰眼能够指出我哪里出错了。由于我对 JQuery 的了解有限，我猜它就在那里。

我真的很感谢任何人花时间来查看这个问题。

谢谢你！

Answer 1

我为您发布了一个 演示 :)

我无法让您的代码与演示一起使用，但首先需要改变的是所有权利都向左移动。不存在 scrollRight 这样的东西。这只是代码中解决了这些问题的第一个函数。

  // function to make the thumbs menu scrollable 
        function buildThumbs($elem){
            var $wrapper       = $elem.next();
            var $menu          = $wrapper.find('.sc_menu');
            var inactiveMargin = 220;

            // move the scroll down to the beggining (move as much as the height of the menu)

            $wrapper.scrollLeft($menu.outerHeight());

           //when moving the mouse up or down, the wrapper moves (scrolls) up or down 

            $wrapper.bind('mousemove',function(e){

                var wrapperWidth = $wrapper.width();
                var menuWidth    = $menu.outerWidth() + 2 * inactiveMargin;
                var left         = (e.pageX - $wrapper.offset().left) * (menuWidth - wrapperWidth) / wrapperWidth - inactiveMargin;

               $wrapper.scrollLeft(left+10);
            });
        }

哦，在这段 CSS 中添加一个 float:left：

.sc_menu img {
 display: block;
 border: none;
 float: left;
 opacity:0.3;
 filter:progid:DXImageTransform.Microsoft.Alpha(opacity=30);
}

---

更新以使滚动和突出显示正常工作 - 它可能不是最有效的方法，但我没有更改代码与原版相差这么多。 此处更新了演示。

CSS

/* Navigation Style */
ul.menu{
 position: fixed;
 top: 0px;
 left:0px;
 width: 100%;
}

ul.menu li{
 position:relative;
 width: 100%
}

ul.menu li > a {
 display: block;
 position:absolute;
 top:300px;
 left:0px;
 width:40px;
 height:200px;
 background-color:#e7e7e8;
}

/* Thumb Scrolling Style */

div.sc_menu_wrapper {
 position: relative;
 height: 220px;
 overflow: hidden;
 top: 300px;
 left: 0px;
 visibility:hidden;
}

div.sc_menu {
 height: 195px;
 visibility:hidden;
 overflow: hidden;
 position: absolute;
 top: 0;
 left: 0;
 display: block;
 top: 0;
 left: 0;
 width: 100%;
}

.sc_menu a {
 background-color:#e7e7e8;
}
.sc_menu img {
 height: 195px;
 width: 130px;
 float: left;
 display: block;
 border: none;
 opacity:0.3;
 filter:progid:DXImageTransform.Microsoft.Alpha(opacity=30);
}

脚本

$(function(){
 // function to make the thumbs menu scrollable
 function buildThumbs($elem) {
  var $wrapper = $elem.next();
  var $menu = $wrapper.find('.sc_menu');
  var leftOffset = $wrapper.offset().left;

  // move the scroll left to the beggining
  $wrapper.scrollLeft(0);
  // make menuWidth (width of all images side by side) include the offset
  var menuWidth = leftOffset;
  // calculate the width of the menu by adding each image width (includes any padding, border & margin)
  $menu.find('img').each(function(){
   $(this).css('left', menuWidth );
   menuWidth += $(this).outerWidth(true);
  });
  // set calculated menu width - if not done, the images will wrap to the next line
  $menu.width(menuWidth);

  //when moving the mouse left or right, the wrapper moves (scrolls) left or right
  $wrapper.bind('mousemove', function(e){
   var wrapperWidth = $wrapper.outerWidth(true);
   var left = ( e.pageX - leftOffset ) * (menuWidth - wrapperWidth) / wrapperWidth;
   $wrapper.scrollLeft(left);
  });
 }

 var stacktime;
 $('#menu li > a').bind('mouseover', function(){
  var $this = $(this);
  // set up thumbnail scrolling
  buildThumbs($this);
  var pos = 0,
      len = $this.next().find('a').length;
  var f = function () {
   if (pos > len) { clearTimeout(stacktime); }
   $this.next().find('a:nth-child(' + pos + ')').css('visibility', 'visible');
   pos++;
  };
  // each thumb will appear with a delay
  stacktime = setInterval(f, 50);
 });

 // on mouseleave, the whole the scrollable area is hidden
 $('#menu li').bind('mouseleave', function(){
  var $this = $(this);
  clearTimeout(stacktime);
  $this.find('.sc_menu').css('visibility', 'hidden').find('a').css('visibility', 'hidden');
  $this.find('.sc_menu_wrapper').css('visibility', 'hidden');
 });

 // when hovering a thumb, change its opacity
 $('.sc_menu a').hover(function(){
  $(this).find('img').stop().animate({ 'opacity': '1.0' }, 400);
 }, function () {
  $(this).find('img').stop().animate({ 'opacity': '0.3' }, 400);
 });
});