[GitHub] [incubator-echarts] feishi20 commented on issue #11361: datazoom event not detected from roam mousewheel or toolbox

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

feishi20 commented on issue #11361:
URL: https://github.com/apache/incubator-echarts/issues/11361#issuecomment-719357075


   ```
   // source: ./node_modules/echarts/src/chart/map/MapView.js  (echarts@4.6.0)
    this.chart.on('geoRoam', (event: any) => {
       if (event) {
         const { type, zoom } = event;
   
         if (type === 'georoam' && zoom) {
           // zoom value may changed with roam
           const chartInfo = this.chart.getModel().getComponent('geo');
           if (chartInfo) {
             const currentZoom = chartInfo.coordinateSystem._zoom;
             ...
           }
         }
       }
     });
   ```


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