图例设置 maxItemWidth 后 value 一直被省略且没有 tip #3908

需要注册交互：

registerInteraction('ellipsis-text', {
  start: [
    {
      trigger: 'legend-item-name:mousemove',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'legend-item-name:touchstart',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'axis-label:mousemove',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'axis-label:touchstart',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
  ],
  end: [
    { trigger: 'legend-item-name:mouseleave', action: 'ellipsis-text:hide' },
    { trigger: 'legend-item-name:touchend', action: 'ellipsis-text:hide' },
    { trigger: 'axis-label:mouseleave', action: 'ellipsis-text:hide' },
    { trigger: 'axis-label:touchend', action: 'ellipsis-text:hide' },
  ],
});

内置没有为 legend-item-value 注册交互，复写一下这个交互就行，如下：

registerInteraction('ellipsis-text', {
  start: [
    {
      trigger: 'legend-item-name:mousemove',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'legend-item-name:touchstart',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'legend-item-value:mousemove',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'legend-item-value:touchstart',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'axis-label:mousemove',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
    {
      trigger: 'axis-label:touchstart',
      action: 'ellipsis-text:show',
      throttle: { wait: 50, leading: true, trailing: false },
    },
  ],
  end: [
    { trigger: 'legend-item-name:mouseleave', action: 'ellipsis-text:hide' },
    { trigger: 'legend-item-name:touchend', action: 'ellipsis-text:hide' },
    { trigger: 'legend-item-value:mouseleave', action: 'ellipsis-text:hide' },
    { trigger: 'legend-item-value:touchend', action: 'ellipsis-text:hide' },
    { trigger: 'axis-label:mouseleave', action: 'ellipsis-text:hide' },
    { trigger: 'axis-label:touchend', action: 'ellipsis-text:hide' },
  ],
});

经确认，上方代码可以让 legend-item-name 和 legend-item-value 同事被裁减，并展示 tip。但目前 G2 不支持只为 legend-item-name 设置 ellipsis，而 legend-item-value 不设置 ellipsis