[GitHub] [echarts] SanLeen commented on issue #16491: [Feature] candlestick y-axis scalable

[GitBox]

SanLeen commented on issue #16491:
URL: https://github.com/apache/echarts/issues/16491#issuecomment-1035917319


   @pissang I have tried using `dataZoom`  to achieve.
   
   #### Problems
   
   1. `filterMode` gets weird
   
   > `filterMode: 'filter'`
   
   
![_scg10](https://user-images.githubusercontent.com/22147095/153545185-e5adffea-4272-478a-aedf-cad40016f045.gif)
   
   > `filterMode: 'weakFilter'`
   
   
![_scg11](https://user-images.githubusercontent.com/22147095/153545270-f95d421a-f0f2-48e7-bd9c-e5c7c435e449.gif)
   
   2.  Due to the upper and lower restrictions, it cannot be freely dragged up 
and down
   
   
![_scg12](https://user-images.githubusercontent.com/22147095/153545989-3d7a754d-94e8-445b-a6b3-a67e544a7254.gif)
   
   #### Desired Result
   
   
![_scg13](https://user-images.githubusercontent.com/22147095/153546372-2b96eda3-d810-471b-9c71-78b0c6afa1a1.gif)
   
   #### Demo Code
   
   ```typescript
   function splitData(rawData: number[][]) {
     let categoryData = [];
     let values = [];
     let volumes = [];
     for (let i = 0; i < rawData.length; i++) {
       categoryData.push(rawData[i].splice(0, 1)[0]);
       values.push(rawData[i]);
       volumes.push([i, rawData[i][4], rawData[i][0] > rawData[i][1] ? 1 : -1]);
     }
   
     return {
       categoryData: categoryData,
       values: values,
       volumes: volumes
     };
   }
   
   $.get(ROOT_PATH + '/data/asset/data/stock-DJI.json', function (rawData) {
     var data = splitData(rawData);
   
     myChart.setOption(
       (option = {
         animation: false,
         tooltip: {
           trigger: 'axis',
           axisPointer: {
             type: 'cross'
           }
         },
         axisPointer: {
           link: [
             {
               xAxisIndex: 'all'
             }
           ],
           label: {
             backgroundColor: '#777'
           }
         },
         grid: [
           {
             left: '10%',
             right: '8%',
             height: '50%'
           },
           {
             left: '10%',
             right: '8%',
             top: '63%',
             height: '16%'
           }
         ],
         xAxis: [
           {
             type: 'category',
             data: data.categoryData,
             boundaryGap: false,
             axisLine: { onZero: false },
             splitLine: { show: false },
             min: 'dataMin',
             max: 'dataMax',
             axisPointer: {
               z: 100
             }
           },
           {
             type: 'category',
             gridIndex: 1,
             data: data.categoryData,
             boundaryGap: false,
             axisLine: { onZero: false },
             axisTick: { show: false },
             splitLine: { show: false },
             axisLabel: { show: false },
             min: 'dataMin',
             max: 'dataMax'
           }
         ],
         yAxis: [
           {
             scale: true,
             splitArea: {
               show: true
             }
           },
           {
             scale: true,
             gridIndex: 1,
             splitNumber: 2,
             axisLabel: { show: false },
             axisLine: { show: false },
             axisTick: { show: false },
             splitLine: { show: false }
           }
         ],
         dataZoom: [
           {
             type: 'inside',
             xAxisIndex: [0, 1],
             start: 98,
             end: 100
           },
           {
             show: true,
             xAxisIndex: [0, 1],
             type: 'slider',
             top: '85%',
             start: 98,
             end: 100
           },
           {
             type: 'inside',
             yAxisIndex: 0,
           },
           {
             type: 'slider',
             yAxisIndex: 0,
             right: '2%',
             // filterMode: 'weakFilter', // 👈 switch filterMode
           }
         ],
         series: [
           {
             name: 'Dow-Jones index',
             type: 'candlestick',
             data: data.values
           },
           {
             name: 'Volume',
             type: 'bar',
             xAxisIndex: 1,
             yAxisIndex: 1,
             data: data.volumes
           }
         ]
       }),
       true
     );
   });
   ```


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