[GitHub] [echarts] phatlewt commented on issue #14539: Sunburst series click event sends the wrong data when coming back from multi level drilled down state

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

phatlewt commented on issue #14539:
URL: https://github.com/apache/echarts/issues/14539#issuecomment-1114061187

   Technically i think it's the correct functionality- the center of a sunburst chart is always considered the "root" so it should always show the root or the top level of the data hierarchy.
   
   I was also facing the same problem so I clicked around the browser inspector of the echarts object and I think I found a solution, which is to get the chart model's series viewRoot:
   
   let viewRoot = myChart._model.getSeries()[0]._viewRoot;
   console.log(viewRoot);
   
   of interest are these properties: name (name of current node), depth (depth of tree; 0=root, 1=1st level, etc.), children[] (array of data objects under current level).
   
   so within the click handler you can do:
   
   ```
   myChart.on('click', 'series', (e)=>
   { 
        console.log(e.data);
        let viewRoot = myChart._model.getSeries()[0]._viewRoot;
        switch(viewRoot.depth)
        {
              case 0: /*do something for root*/ break;
              case 1: /*do something for 1st level*/ break;
              ..etc..
        }
   });
   ```
   
   if you need to get the chart object at some other point in the code:
   `   echarts.getInstanceByDom(document.getElementById("your chart element id"))._model.getSeries()[0]._viewRoot`
   
   I've only just discovered this charting library last week so am quite new and still exploring it too.
   


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