下面以一个环形图为例，现在想做的效果是图例初始化时默认显示第一个图的文字，上代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<script type="text/javascript" src="js/echarts.js" ></script>
</head>
<body>
<div id="main" style="width: 800px;height: 500px;"></div>
<script type="text/javascript">
var myChart = echarts.init(document.getElementById(\'main\'));
var ass = {
normal: {
show: false,
position: \'center\',
textStyle: {
fontSize : \'30\',
fontWeight: \'bold\'
}
},
emphasis: {
show: true,
textStyle: {
fontSize: \'30\',
fontWeight: \'bold\'
}
}
};
var resultData = [
{value:335, name:\'直接访问\'},
{value:310, name:\'邮件营销\'},
{value:234, name:\'联盟广告\'},
{value:135, name:\'视频广告\'},
{value:1548, name:\'搜索引擎\'}
];
var option = {
legend: {
orient: \'vertical\',
x: \'left\',
data:[\'直接访问\',\'邮件营销\',\'联盟广告\',\'视频广告\',\'搜索引擎\']
},
series: [
{
name:\'访问来源\',
type:\'pie\',
radius: [\'50%\', \'70%\'],
avoidLabelOverlap: false,
label: {
normal: {
show: false,
position: \'center\',
textStyle: {
fontSize : \'30\',
fontWeight: \'bold\'
}
},
emphasis: {
show: true,
textStyle: {
fontSize: \'30\',
fontWeight: \'bold\'
}
}
},
labelLine: {
normal: {
show: false
}
},
data:resultData
}
]
};
function emphasis(){
var dataLen = option.series[0].data.length;
// 高亮当前图形
myChart.dispatchAction({
type: \'highlight\',
seriesIndex: 0,
dataIndex: 0
});
}
function unemphasis(){
var dataLen = option.series[0].data.length;
// 取消之前高亮的图形
myChart.dispatchAction({
type: \'downplay\',
seriesIndex: 0,
dataIndex: 0
});
}
myChart.setOption(option);
emphasis();
myChart.on(\'mouseover\', function(a){
if(a.dataIndex!=0){
unemphasis();
}
})
myChart.on(\'mouseout\', function(){
emphasis();
})
</script>
</body>
</html>
效果