[Feature] How to obtain the pixel point at the center of the highest point of each grouping column

[ryanuo]

What problem does this feature solve?

我想要拿到每一个分组柱状图的最高点的中心点, 打算拿graphic实现 现在拿不到每一组最高点的x,y的坐标像素点 想要加标签

What does the proposed API look like?

option = {
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'shadow'
    }
  },
  legend: {},
  grid: {
    left: '3%',
    right: '4%',
    bottom: '3%',
    containLabel: true
  },
  xAxis: [
    {
        "type": "category",
        "position": "bottom",
        "data": [
            "Alipay+",
            "",
            ""
        ],
        "axisLabel": {
            "color": "#ffffff",
            "fontSize": 12,
            "lineHeight": 16
        }
    },
    {
        "type": "category",
        "position": "bottom",
        "data": [
            "",
            "WF",
            ""
        ],
        "axisLabel": {
            "color": "#ffffff",
            "fontSize": 12,
            "lineHeight": 16
        }
    },
    {
        "type": "category",
        "position": "bottom",
        "data": [
            "",
            "",
            "HK Biz"
        ],
        "axisLabel": {
            "color": "#ffffff",
            "fontSize": 12,
            "lineHeight": 16
        }
    }
],
  yAxis: [
    {
      type: 'value'
    }
  ],
  series:[
    {
        "name": "USD",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 0,
        "data": [
            1000000000015.99
        ]
    },
    {
        "name": "USD",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 1,
        "data": [
            "",
            999999999999.99
        ]
    },
    {
        "name": "USD",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 2,
        "data": [
            "",
            "",
            999999999999.99
        ]
    },
    {
        "name": "EUR",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 0,
        "data": [
            1080699999999.91
        ]
    },
    {
        "name": "CNY",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 1,
        "data": [
            "",
            1408400000000
        ]
    },
    {
        "name": "CNY",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 2,
        "data": [
            "",
            "",
            1408400000000
        ]
    },
    {
        "name": "Others(US $)",
        "type": "bar",
        "barWidth": 22,
        "xAxisIndex": 1,
        "data": [
            "",
            2115000000000
        ]
    }
]
};

[ryanuo]

尝试了convertToPixel方法 拿不到返回为NaN

// 假设 myChart 是您的 ECharts 实例
// 您需要等待 chart 完成渲染
myChart.on('finished', function () {
    
    // 假设我们要获取第二个 X 轴（xAxisIndex: 1）第二个柱子（dataIndex: 1）的顶点坐标
    var xAxisIndex = 1;
    var dataIndex = 1;
    var series = myChart.getOption().series;
    var seriesUsingXAxisIndex = series.filter(function(serie) {
      return serie.xAxisIndex === xAxisIndex;
    });

    // 找到最高柱子顶部的像素坐标
    var highestBarPixelCoord = null;
    var highestYValue = 0;
    
    seriesUsingXAxisIndex.forEach(function(serie, index) {
        var barTopValue = serie.data[dataIndex];
        if(barTopValue > highestYValue) {
            highestYValue = barTopValue;
            // 柱子顶部的像素坐标
            highestBarPixelCoord = myChart.convertToPixel({
                seriesIndex: serie.seriesIndex  // 或者使用 seriesId
            }, [dataIndex, barTopValue]);
        }
    });

    if (highestBarPixelCoord) {
        console.log('Highest bar pixel coordinates:', highestBarPixelCoord);
    } else {
        console.error('Failed to convert data point to pixel coordinate');
    }
});

[ryanuo]

拿中心像素点 放标签

[Ovilia]

I tried this and can get the pixels position correctly:

myChart.convertToPixel(
    {
      seriesIndex: 0
    },
    ['Alipay+', 1000000000015.99]
  )