Echart实现鼠标移入移出事件
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
