[GitHub] [incubator-echarts] MousseWang opened a new issue #10429: 通过tooltip中的formatter中更改setOption配置,影响tooltip显示

[GitBox <gi...@apache.org>]

MousseWang opened a new issue #10429: 通过tooltip中的formatter中更改setOption配置,影响tooltip显示
URL: https://github.com/apache/incubator-echarts/issues/10429
 
 
   ### Version
   4.2.1
   
   ### Steps to reproduce
   ```
   tooltip: {
   	...
   	formatter: function(param) {
   	  getLen(myChart,param)
   	  var arr = []
   	  param.forEach(item => {
   		if(item.seriesName === 'Kline'){
   		  arr.push(item.name   '<br />');
   		  ...
   		}
   	  })
   	  return arr.join('')
   	},
   	position: function (pos, params, el, elRect, size) {
   		var obj = {top: 60};
   		obj[['left', 'right'][ (pos[0] < size.viewSize[0] / 2)]] = 60;
   		return obj;
   	}
    },
   ```
   
   ```
   function getLen(myChart,param){
         let data = {
           "MA10": '',
           ...
         }
         param.forEach(item => {
           item.seriesName === "MA10" ? data.MA10 = item.data : null;
           ...
         })
         myChart.setOption({
           legend:[
             {
               formatter: function (name) {
                 return `${name}:${data.MA10.toFixed(2)}`;
               },
             },
             ...
         ]
         })
       }
   ```
   
   ### What is expected?
   图例数据动态显示,tooltip正常
   
   ### What is actually happening?
   图例数据动态显示,tooltip只有在鼠标放置在烛型图上时出现,在放置在画布其他位置时不出现
   
   ---
   业务场景: 需要在图例中动态显示当前鼠标位置的数据
   
   我的解决方案: 在tooltip中的formatter中更改setOption配置,动态修改图例数据
   
   <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE -->
   

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