位置

¥Position

此示例演示如何使用工具提示位置模式设置。

¥This sample shows how to use the tooltip position mode setting.

const config = { type: 'line', data: data, options: { interaction: { intersect: false, mode: 'index', }, plugins: { title: { display: true, text: (ctx) => 'Tooltip position mode: ' + ctx.chart.options.plugins.tooltip.position, }, } } };

const config = {
  type: 'line',
  data: data,
  options: {
    interaction: {
      intersect: false,
      mode: 'index',
    },
    plugins: {
      title: {
        display: true,
        text: (ctx) => 'Tooltip position mode: ' + ctx.chart.options.plugins.tooltip.position,
      },
    }
  }
};

// Create a custom tooltip positioner to put at the bottom of the chart area components.Tooltip.positioners.bottom = function(items) { const pos = components.Tooltip.positioners.average(items); // Happens when nothing is found if (pos === false) { return false; } const chart = this.chart; return { x: pos.x, y: chart.chartArea.bottom, xAlign: 'center', yAlign: 'bottom', }; };

// Create a custom tooltip positioner to put at the bottom of the chart area
components.Tooltip.positioners.bottom = function(items) {
  const pos = components.Tooltip.positioners.average(items);
  // Happens when nothing is found
  if (pos === false) {
    return false;
  }
  const chart = this.chart;
  return {
    x: pos.x,
    y: chart.chartArea.bottom,
    xAlign: 'center',
    yAlign: 'bottom',
  };
};

const DATA_COUNT = 7; const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100}; const data = { labels: Utils.months({count: DATA_COUNT}), datasets: [ { label: 'Dataset 1', data: Utils.numbers(NUMBER_CFG), fill: false, borderColor: Utils.CHART_COLORS.red, backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5), }, { label: 'Dataset 2', data: Utils.numbers(NUMBER_CFG), fill: false, borderColor: Utils.CHART_COLORS.blue, backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5), }, ] };

const DATA_COUNT = 7;
const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100};
const data = {
  labels: Utils.months({count: DATA_COUNT}),
  datasets: [
    {
      label: 'Dataset 1',
      data: Utils.numbers(NUMBER_CFG),
      fill: false,
      borderColor: Utils.CHART_COLORS.red,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
    },
    {
      label: 'Dataset 2',
      data: Utils.numbers(NUMBER_CFG),
      fill: false,
      borderColor: Utils.CHART_COLORS.blue,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
    },
  ]
};

const actions = [ { name: 'Position: average', handler(chart) { chart.options.plugins.tooltip.position = 'average'; chart.update(); } }, { name: 'Position: nearest', handler(chart) { chart.options.plugins.tooltip.position = 'nearest'; chart.update(); } }, { name: 'Position: bottom (custom)', handler(chart) { chart.options.plugins.tooltip.position = 'bottom'; chart.update(); } }, ];

const actions = [
  {
    name: 'Position: average',
    handler(chart) {
      chart.options.plugins.tooltip.position = 'average';
      chart.update();
    }
  },
  {
    name: 'Position: nearest',
    handler(chart) {
      chart.options.plugins.tooltip.position = 'nearest';
      chart.update();
    }
  },
  {
    name: 'Position: bottom (custom)',
    handler(chart) {
      chart.options.plugins.tooltip.position = 'bottom';
      chart.update();
    }
  },
];

文档

¥Docs

• 数据结构（labels）

  ¥Data structures (labels)

• 折线

  ¥Line

• 工具提示

  ¥Tooltip

  • 位置模式

    ¥Position Modes

  • 自定义位置模式

    ¥Custom Position Modes