一般在视频区域中做框样式,作应由视频插件自己来实现,但是出于其它一些原因自己琢磨了一个使用HTML标签来实现框选区域的方法,按照行外应该属于笨方法,虽然有点笨,可能在其他方面有借鉴意义,在这里拿出来跟大家分享。
对于一个视频插件OBJECT,每个边从中间点均分两份, 两个相对边的中间点之间的连线也按中间点分为两份,对于每一份定义一个div标签与其对应,为了保证每份的长度不写死,使其依赖于边的宽和高,定义每份的长度为 50%,宽度定义为1px。 使用绝对定位将每份的div,对应到视频对象的边上。
同时由于OBJECT属于窗口级别对象,对于任意div都不能显示在上层,即时定义z-index属性。为解决这个问题,经过查证后,在div内部预置一个<iframe>标签则可以解决这个问题。
下面给出演示代码,在chrome下可以看见框选有效,其样式需要再调节。
<html>
<body>
<div style="position:absolute; left:50%; top:50%; margin-left:-100; margin-top:-100; width:200px; height:200px;"> <object style="position:absolute; top:0px; left:0px;" height="200px" width="200px" type="image/jpeg" data="./meinv.jpg">
</object> <!-- top left -->
<div id="BoxBorder_topLeft" style="width:50%; height:1px; position:absolute; top:0px; left:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- top right -->
<div id="BoxBorder_topRight" style="width:50%; height:1px; position:absolute; top:0px; left:50%; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- right top -->
<div id="BoxBorder_rightTop" style="width:1px; height:50%; position:absolute; top:0px; right:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- right down -->
<div id="BoxBorder_rightDown" style="width:1px; height:50%; position:absolute; top:50%; right:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- bottom left -->
<div id="BoxBorder_bottomLeft" style="width:50%; height:1px; position:absolute; bottom:0px; left:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- bottom right -->
<div id="BoxBorder_bottomRight" style="width:50%; height:1px; position:absolute; bottom:0px; right:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- left top -->
<div id="BoxBorder_leftTop" style="width:1px; height:50%; position:absolute; top:0px; left:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- left down -->
<div id="BoxBorder_leftDown" style="width:1px; height:50%; position:absolute; top:50%; left:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- vertical up -->
<div id="BoxBorder_verticalUp" style="width:1px; height:50%; position:absolute; left:50%; top:0px; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- vertical down -->
<div id="BoxBorder_verticalDown" style="width:1px; height:50%; position:absolute; left:50%; top:50%; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- horizon left -->
<div id="BoxBorder_horizonLeft" style="width:50%; height:1px; position:absolute; left:0px; top:50%; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <!-- horizon right -->
<div id="BoxBorder_horizonRight" style="width:50%; height:1px; position:absolute; left:50%; top:50%; ">
<iframe src="javascript:false" style="position:absolute; visibility:inherit; top:0px; left:0px; width:100%; height:100%; z-index:-1;;"></iframe>
<div style="width:100%; height:100%; background:red;"></div>
</div> <script>window.createPopup();</script>
</div>
</body>
</html>