option = {
legend: {
orient: 'horizontal', // 'vertical'
x: 'right', // 'center' | 'left' | {number},
y: 'top', // 'center' | 'bottom' | {number}
backgroundColor: '#eee',
borderColor: 'rgba(178,34,34,0.8)',
borderWidth: 4,
padding: 10, // [5, 10, 15, 20]
itemGap: 20,
textStyle: {color: 'red'},
selected: {
'降水量' : false
},
data: [
{
name:'蒸发量',
icon : 'image://../asset/ico/favicon.png',
textStyle:{fontWeight:'bold', color:'green'}
},
'降水量','最高气温', '最低气温'
]
},
xAxis :{
data : ['周一','周二','周三','周四','周五','周六','周日']
},
yAxis : [
{
type : 'value',
axisLabel : {
formatter: '{value} ml'
}
},
{
type : 'value',
axisLabel : {
formatter: '{value} °C'
},
splitLine : {show : false}
}
],
series : [
{
name:'蒸发量',
type:'bar',
data:[2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6]
},
{
name:'最高气温',
type:'line',
yAxisIndex: 1,
data:[11, 11, 15, 13, 12, 13, 10]
},
{
name:'降水量',
type:'bar',
data:[2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6]
}
]
};
// 动态添加默认不显示的数据
var ecConfig = require('echarts/config');
myChart.on(ecConfig.EVENT.LEGEND_SELECTED, function (param){
var selected = param.selected;
var len;
var added;
if (selected['最低气温']) {
len = option.series.length;
added = false;
while (len--) {
if (option.series[len].name == '最低气温') {
// 已经添加
added = true;
break;
}
}
if (!added) {
myChart.showLoading({
text : '数据获取中',
effect: 'whirling'
});
setTimeout(function (){
option.series.push({
name:'最低气温',
type:'line',
yAxisIndex: 1,
data:[-2, 1, 2, 5, 3, 2, 0]
});
myChart.hideLoading();
myChart.setOption(option);
}, 2000)
}
}
});
参考地址：http://echarts.baidu.com/echarts2/doc/example/legend.html
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