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如何制作电子地图地图弹窗(map pop)具体演示地址:http://www.planabc.net/demo/mappop.html 这个实例,基本上是应用hover来实现隐藏/显示效果。 实例初始部分内容被隐藏,当hover时让其隐藏的内容显示。对于初始的隐藏我们可以通过,对父元素设置相对位置(position : relative;),对其要隐藏的子元素设置绝对位置(position : absolute;),然后对要隐藏的子元素设置margin属性,并给于无限大负值让其移动无限远隐藏,而当hover触发时,通过对隐藏的子元素重新设置margin值让其显示。对于图片中变化的部分我们可以通过hover时背景图的变化来实现。 首先我们要准备好分析用的图片,如下总共7张,或许有人要问,为什么背景触发的图片使用一张,而不使用5张。其实部分原因大家应该可以看出,就是以后维护的方便,修改一张图总比修改5张图片来的方便,其次使用5张图浏览器需要加载5次,而使用1张图浏览器只需要加载一次就行了。那或许有朋友要问了,那我把2张背景图放在一张上可以吗?按照你上面的理论,不是更方便吗?是的,放一张上从逻辑上是可以的,但有时候还要考虑到图片的大小和图片加载的速度。 首先我们要显示5部分内容,内容结构相似,我们可以选用无序列表来显示介绍的图片和内容: <ul> <li><a id="map01" href="#map01"><img src="/Article/bin/200703/20070305141544739.jpg" alt="Post Office" />This is the Popsville community <strong>Post Office</strong>, your home of over-priced postage. Click map for more</a></li> <li><a id="map02" href="#map02"><img src="/Article/bin/200703/20070305141544740.jpg" alt="Dew Drop Inn" />Home is where the beer is. And that means the <strong>Dew Drop Inn</strong>. Live music on the weekends. Click map for more</a></li> <li><a id="map03" href="#map03"><img src="/Article/bin/200703/20070305141544236.jpg" alt="River Beach" />Spend lazy summer afternoons at the beautiful <strong>River Beach</strong>. Hang out on the nude beach. Click map for more</a></li> <li><a id="map04" href="#map04"><img src="/Article/bin/200703/20070305141544869.jpg" alt="Woodland Traders" />Our local <strong>Woodland Traders</strong> is a veritable Mecca of consumer goods and hardware. Click map for more</a></li> <li><a id="map05" href="#map05"><img src="/Article/bin/200703/20070305141544260.jpg" alt="Wild Game Diner" />Country living means road kill, and the <strong>Wild Game Diner</strong> prepares it with special sauce. Click map for more</a></li> </ul> 对于a中的内容我们进行隐藏,我们考虑增加span元素来实现,代码修改如下: <ul> <li><a id="map01" href="#map01"><span class="offset"><img src="/Article/bin/200703/20070305141544739.jpg" alt="Post Office" />This is the Popsville community <strong>Post Office</strong>, your home of over-priced postage. Click map for more</span></a></li> <li><a id="map02" href="#map02"><span class="offset"><img src="/Article/bin/200703/20070305141544740.jpg" alt="Dew Drop Inn" />Home is where the beer is. And that means the <strong>Dew Drop Inn</strong>. Live music on the weekends. Click map for more</span></a></li> <li><a id="map03" href="#map03"><span class="offset"><img src="/Article/bin/200703/20070305141544236.jpg" alt="River Beach" />Spend lazy summer afternoons at the beautiful <strong>River Beach</strong>. Hang out on the nude beach. Click map for more</span></a></li> <li><a id="map04" href="#map04"><span class="offset"><img src="/Article/bin/200703/20070305141544869.jpg" alt="Woodland Traders" />Our local <strong>Woodland Traders</strong> is a veritable Mecca of consumer goods and hardware. Click map for more</span></a></li> <li><a id="map05" href="#map05"><span class="offset"><img src="/Article/bin/200703/20070305141544260.jpg" alt="Wild Game Diner" />Country living means road kill, and the <strong>Wild Game Diner</strong> prepares it with special sauce. Click map for more</span></a></li> </ul> 在显示的时候文字会跟着图片排版,为了方便我们对其中的描述文字进行样式调整而不影响图片的布局,我们单独给描述文字增加span元素,代码修改如下: <ul> <li><a id="map01" href="#map01"><span class="offset"><img src="/Article/bin/200703/20070305141544739.jpg" alt="Post Office" /><span>This is the Popsville community <strong>Post Office</strong>, your home of over-priced postage. Click map for more</span></span></a></li> <li><a id="map02" href="#map02"><span class="offset"><img src="/Article/bin/200703/20070305141544740.jpg" alt="Dew Drop Inn" /><span>Home is where the beer is. And that means the <strong>Dew Drop Inn</strong>. Live music on the weekends. Click map for more</span></span></a></li> <li><a id="map03" href="#map03"><span class="offset"><img src="/Article/bin/200703/20070305141544236.jpg" alt="River Beach" /><span>Spend lazy summer afternoons at the beautiful <strong>River Beach</strong>. Hang out on the nude beach. Click map for more</span></span></a></li> <li><a id="map04" href="#map04"><span class="offset"><img src="/Article/bin/200703/20070305141544869.jpg" alt="Woodland Traders" /><span>Our local <strong>Woodland Traders</strong> is a veritable Mecca of consumer goods and hardware. Click map for more</span></span></a></li> <li><a id="map05" href="#map05"><span class="offset"><img src="/Article/bin/200703/20070305141544260.jpg" alt="Wild Game Diner" /><span>Country living means road kill, and the <strong>Wild Game Diner</strong> prepares it with special sauce. Click map for more</span></span></a></li> </ul> XHTML部分我们已经写好,下面将是我们对其表现的设计部分,即CSS部分。 首先我们清除一下元素默认的边距(内边距和外边距)和设置img的默认边框为0: * { margin:0; padding:0; } img { border:0; } 我们定义下ul的样式,包括ul的预设标记,大小,高度,边框: ul { list-style-type:none; background: transparent url(/Article/bin/200703/20070305141543118.jpg) no-repeat 0 0; width:350px; height:250px; border:1px solid #000; } 对于li的显示方式设置内联(display: inline;)行布局: ul li { display:inline; } 下面是我们讲解的重点,隐藏/显示效果。 对li中的a元素我们设置其块元素显示(display: block;),让其相对位置(position: relative;),并使链接不显示下划线。 ul li a { position:relative; display:block; text-decoration:none; } 让类选择器为offset的span隐藏,至于怎样隐藏文章开头已经分析了: ul li a span.offset { position:absolute; margin-top:-9000px; margin-left:-9000px; } 如上已经实现了内容隐藏,现在我们制作考虑触发显示的效果: ul li a:hover span.offset, ul li a:focus span.offset, ul li a:active span.offset { color: #000; background-image:none; background-color:#ffffde; border:1px solid #000; display:block; width:150px; height:auto; text-decoration:none; cursor:pointer; } 我们再来对span中的文字描述进行样式修饰,因为span开始是被隐藏的,所以设置只需在触发的情况下设置就可以了: ul li a:hover span.offset span, ul li a:focus span.offset span, ul li a:active span.offset span { display:block; width:140px; height:120px; margin:5px; } 隐藏显示效果我们是达到了,但具体的map触发范围,定位,还有背景的变换我们还没实现,继续往下探讨,仅以map01为例,其他雷同。 设置map01的宽度和高度,以及外边距位置: ul li a#map01 { width:80px; height:60px; margin-top:0; margin-left:130px; } 当触发时改变其背景图片(图片的位置注意和map01的外边距margin位置相对应): ul li a#map01:hover, ul li a#map01:focus, ul#cmp li a#map01:active { background:transparent url(/Article/bin/200703/20070305141543592.jpg) no-repeat -130px 0px; } 设置触发后描述部分的位置,开始我们对于a元素设置了1px的边框,那么要让map01中的描述显示在右侧,并且和a元素的位置top相同,则要让类选择器为offset的span上移1px(我们通过margin-top的负值来实现),设置描述部分的外左边距,刚才我们设置了map01的外左边距为130px(ul的总宽为350px),那我们可以设置描述部分的外边距大于220px(350px-130px)。 ul li a#map01:hover span.offset, ul li a#map01:focus span.offset, ul li a#map01:active span.offset { margin-top:-1px; margin-left:230px; } 根据上面map01的设置方法来设置map02/map03/map04/map05,如下: ul li a#map02 { width:110px; height:75px; margin-top:-50px; margin-left:235px; } ul li a#map02:hover, ul li a#map02:focus, ul li a#map02:active { background:transparent url(/Article/bin/200703/20070305141543592.jpg) no-repeat -235px -10px; } ul li a#map02:hover span.offset, ul li a#map02:focus span.offset, ul li a#map02:active span.offset { margin-top:-11px; margin-left:125px; } ul li a#map03 { width:75px; height:95px; margin-top:3px; margin-left:115px; } ul li a#map03:hover, ul li a#map03:focus, ul li a#map03:active { background:transparent url(/Article/bin/200703/20070305141543592.jpg) no-repeat -115px -88px; } ul li a#map03:hover span.offset, ul li a#map03:focus span.offset,ul li a#map03:active span.offset { margin-top:-89px; margin-left:245px; } ul li a#map04 { width:110px; height:120px; margin-top:-60px; margin-left:5px; } ul li a#map04:hover, ul li a#map04:focus, ul li a#map04:active { background:transparent url(/Article/bin/200703/20070305141543592.jpg) no-repeat -5px -123px; } ul li a#map04:hover span.offset, ul li a#map04:focus span.offset, ul li a#map04:active span.offset { margin-top:-124px; margin-left:355px; } ul li a#map05 { width:95px; height:97px; margin-top:-90px; margin-left:240px; } ul li a#map05:hover, ul li a#map05:focus, ul li a#map05:active { background:transparent url(/Article/bin/200703/20070305141543592.jpg) no-repeat -240px -153px; } ul li a#map05:hover span.offset, ul li a#map05:focus span.offset, ul li a#map05:active span.offset { margin-top:-154px; margin-left:120px; } 可能有某些朋友看上面的map代码的位置有些糊涂了,下面几点或许有助于朋友们理解: 1、li元素设置为了内联行布局; 2、当一个li和另外一个li的大小超过ul的大小时,另一个li将换行显示。 作者:佚名 文章来源:IT 点击数: 更新时间:2007-3-5
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