javascript - React 组件被调用但未正确渲染

Question

我有一个用 VictoryPie 实现的饼图。我想当鼠标悬停在每个切片上时显示一个标签。

我在 MouseFollowToolTip 组件中放置了一条打印语句。当页面加载时，语句已打印五次，这是有道理的，因为有五个切片。然后，当我在饼图周围移动鼠标时，它会继续打印。

但是，它在任何时候都不会显示与切片关联的标签。

import React from 'react';
import Grid from '$components/grid';
import { VictoryLegend, VictoryPie, VictoryTooltip, VictoryLabel, Selection } from 'victory';

const creditScoreMakeup = [
    {
        x: 'Payment history',
        y: 35,
        label:
            'The best way for you to improve \nyour credit score is to \nfocus on making payments on time.',
    },
    {
        x: 'Credit utilization',
        y: 30,
        label:
            'You should try to carry little \nto no balance on your credit card \nto lower your credit utilization and \nimprove your credit score.',
    },
    {
        x: 'Length of history',
        y: 15,
        label:
            'A longer credit history provides lenders with more information about how you use credit which helps them predict how you will behave financially long-term.',
    },
    {
        x: 'Credit diversity',
        y: 10,
        label:
            'Having a mix of loans and credit cards \ngives lenders the impression that you can \nhandle various forms of credit responsibly.',
    },
    {
        x: 'Credit inquiries',
        y: 10,
        label:
            'Having many inquiries in a \nshort period of time in your \ncredit history suggests that you \nare in financial trouble and need \na significant amount of money.',
    },
];

class MouseFollowToolTip extends React.Component {

  static defaultEvents = [
    {
      target: "data",
      eventHandlers: {
        onMouseOver: evt => {
          const { x, y } = Selection.getSVGEventCoordinates(evt);
          return {
            mutation: () => ({
              target: "labels",
              x,
              y,
              active: true
            })
          };
        },
        onMouseMove: evt => {
          const { x, y } = Selection.getSVGEventCoordinates(evt);
          return {
            mutation: () => ({
              target: "labels",
              x,
              y,
              active: true
            })
          };
        },
        onMouseOut: () => {
          return { target: "labels", mutation: () => ({ active: false }) };
        }
      }
    }
  ];
  render() {
    console.log("called")
    return <VictoryTooltip {...this.props} pointerLength={0} renderInPortal={false} />;
  }
}


class CreditScore extends React.Component {
  render() {
    return (

        <svg width={1000} height={1000}>
            <VictoryLegend
                standalone={false}
                renderInPortal={false}
                colorScale="green"
                legendWidth={50}
                x={20}
                y={40}
                gutter={20}
                title="Legend"
                centerTitle
                style={{ border: { stroke: 'black' } }}
                data= {creditScoreMakeup.map((a, ind) => {
                    return { name: a.x };
                })}
            />
            <VictoryPie
                    colorScale="green"
                    data={creditScoreMakeup}
                    standalone={false}
                    renderInPortal={false}
                    width={800}
                    height={400}
                    padding-right={100}
                    style={{ parent: { maxWidth: '50%' } }}
                    //labels={d => `${d.label}%`}
                    labelComponent= {<MouseFollowToolTip/>}
                />


            </svg>

    );
  }

}

我做了一个sandbox here

Answer 1

这是一个跟踪 CreditScore 组件内鼠标移动的解决方案:

class MouseFollowTooltip extends VictoryTooltip {
  render() {
    return (
      <VictoryTooltip
        {...this.props}
        pointerLength={16}
        renderInPortal={false}
      />
    );
  }
}

class CreditScore extends React.Component {
  state = {
    x: 0,
    y: 0
  };

  updateCoords = e => {
    this.setState({ x: e.clientX, y: e.clientY });
  };

  render() {
    return (
      <svg onMouseMove={this.updateCoords} width={1000} height={1000}>
        <VictoryLegend
          standalone={false}
          renderInPortal={false}
          colorScale="green"
          legendWidth={50}
          x={20}
          y={40}
          gutter={20}
          title="Legend"
          centerTitle
          style={{ border: { stroke: "black" } }}
          data={creditScoreMakeup.map((a, ind) => {
            return { name: a.x };
          })}
        />
        <VictoryPie
          colorScale="green"
          data={creditScoreMakeup}
          standalone={false}
          renderInPortal={false}
          width={800}
          height={400}
          padding-right={100}
          style={{ parent: { maxWidth: "50%" } }}
          labels={d => `${d.label}%`}
          labelComponent={
            <MouseFollowTooltip x={this.state.x} y={this.state.y} />
          }
        />
      </svg>
    );
  }
}

代码沙箱:https://codesandbox.io/s/muddy-forest-6n4fp