带文本的气泡图点重叠时只显示单个标签（文本） #3618

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Reproduction link

https://antv-g2.gitee.io/zh/examples/point/bubble#bubble-text

Steps to reproduce

带文本的气泡图中如果对应的x,y轴的值相同则只会显示一个数据标签（文本），其中最后原始数据中的最后四个点设置为x,y相同，只显示最后一个点MC的标签 代码如下：

import { Chart } from '@antv/g2';

const data = [
    { x: 86.5, y: 102.9, z: 14.7, name: 'DE', country: 'Germany' },
  { x: 80.8, y: 91.5, z: 15.8, name: 'FI', country: 'Finland' },
  { x: 80.4, y: 102.5, z: 12, name: 'NL', country: 'Netherlands' },
  { x: 80.3, y: 86.1, z: 11.8, name: 'SE', country: 'Sweden' },
  { x: 78.4, y: 70.1, z: 16.6, name: 'ES', country: 'Spain' },
  { x: 74.2, y: 68.5, z: 14.5, name: 'FR', country: 'France' },
  { x: 73.5, y: 83.1, z: 10, name: 'NO', country: 'Norway' },
  { x: 71, y: 93.2, z: 24.7, name: 'UK', country: 'United Kingdom' },
  { x: 69.2, y: 57.6, z: 10.4, name: 'IT', country: 'Italy' },
  { x: 68.6, y: 20, z: 16, name: 'RU', country: 'Russia' },
  { x: 65.5, y: 126.4, z: 35.3, name: 'US', country: 'United States' },
  { x: 65.4, y: 50.8, z: 28.5, name: 'BV', country: 'Hungary' },
  { x: 63.4, y: 51.8, z: 15.4, name: 'UT', country: 'Portugal' },
  { x: 80, y: 95, z: 13.8, name: 'VV', country: 'Belgium' },
  { x: 80, y: 95, z: 14.7, name: 'TC', country: 'Germany' },
  { x: 80, y: 95, z: 15.8, name: 'UE', country: 'Finland' },
  { x: 80, y: 95, z: 12, name: 'MC', country: 'Netherlands' }
];
const chart = new Chart({
  container: 'container',
  autoFit: true,
  height: 500,
  padding: [20, 20, 50, 80],
});
chart.data(data);
chart.scale({
  x: {
    alias: 'Daily fat intake', // 定义别名
    tickInterval: 5, // 自定义刻度间距
    max: 96, // 自定义最大值
    min: 62 // 自定义最小是
  },
  y: {
    alias: 'Daily sugar intake',
    tickInterval: 50,
    max: 165,
    min: 0
  },
  z: {
    alias: 'Obesity(adults) %'
  }
});
// 开始配置坐标轴
chart.axis('x', {
  label: {
    formatter: val => {
      return val   ' gr'; // 格式化坐标轴显示文本
    }
  },
  grid: {
    line: {
      style: {
        stroke: '#d9d9d9',
        lineWidth: 1,
        lineDash: [2, 2]
      }
    }
  }
});
chart.axis('y', {
  title: {
    offset: 64
  },
  label: {
    formatter: val => {
      if ( val > 0) {
        return val   ' gr';
      } else {
        return val;
      }
    }
  }
});
chart.legend(false);
chart.tooltip({
  title: 'country',
  showMarkers: false
});
chart
  .point()
  .position('x*y')
  .color('#1890ff')
  .size('z', [10, 40])
  .label('name', {
    layout: {
      type: 'Overlap',
    },
    offset: 0, 
    labelLine:true,
    style: {
      fill: '#1890FF',
      stroke: '#fff',
      lineWidth: 1,
    }
  })
  .shape('circle')
  .tooltip('x*y*z')
  .style({
    lineWidth: 1,
    stroke: '#1890ff',
    fillOpacity: 0.3,
  });
chart.annotation().line({
  top: true,
  start: [65, 'min'],
  end: [65, 'max'],
  text: {
    content: 'Safe fat intake 65g/day',
    position: 'end',
    autoRotate: false,
    style: {
      textAlign: 'start'
    }
  }
});
chart.annotation().line({
  top: true,
  start: ['min', 50],
  end: ['max', 50],
  text: {
    content: 'Safe sugar intake 50g/day',
    position: 'end',
    style: {
      textAlign: 'end'
    }
  }
});
chart.annotation().region({
  start: ['0%', '0%'],
  end: ['100%', '100%'],
  style: {
    lineWidth: 1,
    fillOpacity: 0,
    strokeOpacity: 1,
    stroke: '#545454',
  }
});

chart.interaction('element-active');

chart.render();

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