彩票走势图

有时候需要用饼图做数据分析，而展示分布数据，使用饼图是一个相当棒的方式，你不用说太多，直接在饼图中显示，就能把信息传达清楚。

选择amCharts制作饼图也是一个很棒的选择，因为amCharts的饼图可以自动适配小容器，甚至是一个200x200px 的容器，他也是i可以自动适应的。

• 下载amCharts

让我们来看看下面的例子：

1、将饼图插入200px 宽的边栏

2、我们还可以设置半径，让图表变得更大些，图表大小很合适，但是标签超出，被截断

边栏内边距可以调整，这里有几个技巧：

• 使图表容器变大
• 使用新div，让图表和内边距适应

这里有个例子：

如上图，大容器包含小容器。

3、我们需要一个CSS实现它：

#chartwrapper {
position: relative;
width: 200px;
height: 200px;
}
#chartdiv {
position: absolute;
top: -30px;
left: -30px;
width : 260px;
height : 260px;
}

4、最后结果如下图，书籍标签没有被截断但是超出了。

5、无边框的效果

6、完整的JS代码：

var chart = AmCharts.makeChart("chartdiv", {
"type": "pie",
"theme": "none",
"dataProvider": [
{
"country": "Lithuania",
"litres": 501.9
},
{
"country": "Czech Republic",
"litres": 301.9
}, {
"country": "Ireland",
"litres": 201.1
}, {
"country": "Germany",
"litres": 165.8
}, {
"country": "Australia",
"litres": 139.9
}],
"valueField": "litres",
"titleField": "country",
//"radius": "28%",
"labelRadius": 4,
"labelText": "[[percents]]%"
});

CSS

body {
font-family: Verdana;
font-size: 12px;
padding: 30px;
}
p {
margin-bottom: 20px;
}
#sidebar {
width: 200px;
background: #eee;
float: right;
margin-left: 30px;
}
#sidebar h2 {
font-size: 18px;
text-align: center;
background: #dfdfdf;
border-bottom: 2px solid #fff;
padding: 10px;
}
#sidebar p {
padding: 10px;
margin: 0;
}
#chartwrapper {
position: relative;
width : 200px;
height : 200px;
background: #fff;
/*border: 1px dotted #c00;*/
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
#chartdiv {
position: absolute;
top: -30px;
left: -30px;
width : 260px;
height : 260px;
/*border: 1px dotted #0c0;*/
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}

HTML

<script type="text/javascript" src="//www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="//www.amcharts.com/lib/3/pie.js"></script>
<script type="text/javascript" src="//www.amcharts.com/lib/3/themes/none.js"></script>

<div id="sidebar">
<h2>Sidebar</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam egestas sapien at purus lacinia, ac accumsan justo consequat. </p>
<div id="chartwrapper">
<div id="chartdiv"></div>
</div>
<p>Curabitur eget sollicitudin nisi. Curabitur dapibus at mi a elementum. Nullam ut nisi diam. Nulla ac enim feugiat, imperdiet dolor a, commodo ipsum.</p>
</div>

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