<html>
<head>
<title>css圓角效果</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<style type="text/css">
div.RoundedCorner{background: #9BD1FA}
b.rtop, b.rbottom{display:block;background: #FFF}
b.rtop b, b.rbottom b{display:block;height: 1px;overflow: hidden; background: #9BD1FA}
b.r1{margin: 0 5px}
b.r2{margin: 0 3px}
b.r3{margin: 0 2px}
b.rtop b.r4, b.rbottom b.r4{margin: 0 1px;height: 2px}
</style>
</head>
<body>
<div class="RoundedCorner">
<b class="rtop"><b class="r1"></b><b class="r2"></b><b class="r3"></b><b class="r4"></b></b>
1
<b class="rbottom"><b class="r4"></b><b class="r3"></b><b class="r2"></b><b class="r1"></b></b>
</div>
</body>
</html>
當然這樣人為的把圓角值設定好,也非常好用了,基本上這段代碼拿過去就可以用,但是如果要改變這個圓角的大小,要在這個角上加邊框或基它的效果,那這段代碼拿來就發揮不了它的威力了.就想做一個抽像化的組件化的東西出來!今年可謂是花費了幾乎一天的時間!
想一想,圓角的四個角加在一起正好是一個圓,而圓的運算式是x*x+y*y=r*r,即x的平方加上y的平方等於半徑的平方!有了這個公式,那麼實現圓解的理論就得以角決了!
開始一步步的測試由沒有到有,由零難化到組件化吧!我把一個圓角實現分為這樣的結構
[頂部][頂部圓角顯示控制][/頂部]
[主體][主體左邊顯示圓解控制][主體內容][主體右邊顯示賀角控制][/主體]
[底部][底部圓解顯示控制][/底部]
得到今天的測試代碼:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>CSS圓角框加組件開發--測試過程</title>
<style type="text/css">
<!--
#box,#topbox,#bottombox{
width:400px;
}
#box .content{ background-color:#FFCC00;height:400px;}
<?php
for($y=1;$y<=4;$y++){
$x=(int)sqrt(4*4-$y*$y);
$sx=4-$x;
echo ".line{$y}{height:1px;overflow:hidden; background-color:#FFCC00;margin: 0 {$sx}px;}\n";
}
?>
-->
</style>
</head>
<body>
<div id="topbox">
<?php
for($y=4;$y>=1;$y--){
echo "<div class=\"line{$y}\"></div>\n";
}
?>
</div>
<div id="box">
<div class="content"> aaaaaaaaaaaaaaaaaa</div>
</div>
<div id="bottombox">
<?php
for($y=1;$y<=4;$y++){
echo "<div class=\"line{$y}\"></div>\n";
}
?>
</div>
</body>
</html>
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