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    • [翻译]用css制作星级评分 I

      原文:Creating a Star Rater using CSS 链接:http://komodomedia.com/blog/index.php/2005/08/24/creating-a-star-rater-using-css/
      版权:版权归原作者所有,翻译文档版权归本人|greengnn,和blueidea。

      先看看效果

      网页防刷新重复提交、防后退解决方法

      HTML&CSS

      Step 1: XHTML

       <ul class="star-rating">   
          <li><a href="#" title="Rate this 1 star out of 5" class="one-star">1</a></li>    
          <li><a href="#" title="Rate this 2 stars out of 5" class="two-stars">2</a></li>   
          <li><a href="#" title="Rate this 3 stars out of 5" class="three-stars">3</a></li>   
          <li><a href="#" title="Rate this 4 stars out of 5" class="four-stars">4</a></li>  
          <li><a href="#" title="Rate this 5 stars out of 5" class="five-stars">5</a></li>
       </ul>
      

      这里只介绍静态的技术,随后会给出系统的应用,你也是自己加程序来尝试一下,还可以采用ajax来做出绚丽的效果

      Step 2:图像|Graphics

      为了节省您的空间和宽带,我们采用gif图,这个图片就是打分的按钮。



      Step 3:CSS

      1. .star-rating{
      2. list-style: none; /* turn off the default list image bullets*/
      3. margin: 3px; /*I wan’t some space around this thing*/
      4. padding: 0px; /* I’m anal. I’m pretty sure OL’s have a default padding of 0px, but we’ll set it to 0px just to be safe*/
      5. width: 100px; /*This list is 5 stars, each star is 20px, therefore it should be 5 x 20px = 100px wide*/
      6. height: 20px; /* The height of each star is 20px. Since this is a horizontal list, we will set the list height to the height of the star.*/
      7. position: relative; /*Very important. We will be using absolute positioning later. We want to use relatively-absolute positioning.*/
      8. background: url(star_rating.gif) top left repeat-x; /* By repeating this image horizontally, the list will appear to have five stars.*/

      根据代码我们知道:

      去掉了ul的margin和padding以及list-style,定义了高20px宽100px的一个区块

      下来时按钮元素的制作,下面是css

      1. .star-rating li{
      2. padding:0px; /* no padding at all*/
      3. margin:0px; /* no margin at all*/
      4. /**/ /*Backslash hack, this causes IE5 Mac NOT to see this rule*/
      5. float: left; /* for any other browser, we are going to float left, this makes a horizontal list*/
      6. /* */ /* end the IE5 Backslash hack*/ 7. }

      这段代码让li实现横向排放,并解决IE5 MAC bug

      继承上面的按钮元素样式,再定义鼠标动作,下面是css

      1. .star-rating li a{
      2. display:block; /* we want a block item, so that we can mess with its height and width*/
      3. width:20px; /* easy stuff, we want the width to be the same as the star width*/
      4. height: 20px; /* same as the width*/
      5. text-decoration: none; /* remove the underline from the link*/
      6. text-indent: -9000px; /* indent the text off the screen using a image-replacement technique, we dont want to see the text anymore.*/
      7. z-index: 20; /*we’ll come back to this*/
      8. position: absolute; /*we can now control the exact x and y coordinates of each star, relative to the parent UL*/
      9. padding: 0px; /*once again, we don’t need any padding*/
      10. background-image:none; /* we will not show the star*/
      11. }
      12.
      13. .star-rating li a:hover{
      14. background: url(star_rating.gif) left bottom; /*this is where the magic is*/
      15. z-index: 1; /*move this star to the bottom of the z-index stack*/
      16. left: 0px; /*move this star all the way to the left, aligned with the side of the UL parent item*/ 17. }

      下来我们要考虑怎样才能显示不同的星级,三星?四星?原理是什么,我们继续将背景图片横向重复显示,然后定义a和a:hover的宽度来区分选择的星级。

      下面是css

      1. .star-rating a.one-star{
      2. left: 0px;
      3. }
      4.
      5. .star-rating a.one-star:hover{
      6. width:20px;
      7. }
      8. .star-rating a.two-stars{
      9. left:20px;
      10. }
      11. .star-rating a.two-stars:hover{
      12. width: 40px;
      13. }
      14. .star-rating a.three-stars{
      15. left: 40px;
      16. }
      17. .star-rating a.three-stars:hover{
      18. width: 60px;
      19. }
      20. .star-rating a.four-stars{
      21. left: 60px;
      22. }
      23. .star-rating a.four-stars:hover{
      24. width: 80px;
      25. }
      26. .star-rating a.five-stars{
      27. left: 80px;
      28. }
      29. .star-rating a.five-stars:hover{
      30. width: 100px;
      31. }

      到此,这个制作完成

      网页防刷新重复提交、防后退解决方法

      HTML&CSS

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