Re: [I] [Feature] Allow drag-to-zoom even when toolbox.feature.dataZoom.show is false [echarts]

["unitrongroup-ir (via GitHub)" <gi...@apache.org>]

unitrongroup-ir commented on issue #21367:
URL: https://github.com/apache/echarts/issues/21367#issuecomment-6024706082

   +1, we needed the same thing (Plotly-like drag zoom with our own zoom buttons outside the chart).
   
   In case it helps someone until this is there: we keep the toolbox but make it invisible with `itemSize: 0`. With `show: false` the feature isn't rendered at all and dragging does nothing. Then we switch the select mode on ourselves:
   
   ```js
   toolbox: {
     show: true,
     itemSize: 0,
     showTitle: false,
     feature: { dataZoom: { yAxisIndex: 'none', filterMode: 'none' } }
   }
   ```
   
   ```js
   chart.dispatchAction({ type: 'takeGlobalCursor', key: 'dataZoomSelect', dataZoomSelectActive: true });
   ```
   
   After `setOption(option, { notMerge: true })` the select mode is off again, so we dispatch it after every update. Dispatch it with `dataZoomSelectActive: false` before the `setOption` too, otherwise you run into #21661.
   


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