我希望将鼠标悬停在圆圈上时显示工具提示。如果注释掉我附加的svg元素以设置容器的宽度和高度,则会出现工具提示。我在这里做错了什么?我完全遇到了障碍。以下是我何时不附加svg以及何时附加svg来设置容器
的大小的图像import React, {Component, useRef, useEffect} from 'react';
import * as d3 from "d3";
//import {withFauxDOM} from 'react-faux-dom';
//import ReactFauxDOM from 'react-faux-dom'
import Faux from "react-faux-dom"
import { select } from 'd3-selection'
import { createNoSubstitutionTemplateLiteral } from 'typescript';
import { extent, max, min } from "d3-array";
class Linechart extends Component {
constructor(props){
super(props)
this.createBarChart = this.createBarChart.bind(this)
}
componentDidMount() {
this.createBarChart()
}
componentDidUpdate() {
this.createBarChart()
}
createBarChart() {
var margin = {top: 30, right: 30, bottom: 30, left: 60},
width = 960 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
var node = this.node
var divObj = select(node)
// .append("svg")
// .attr("width", width + margin.left + margin.right)
// .attr("height", height + margin.top + margin.bottom)
// .append("g")
// .attr("transform","translate(" + margin.left + "," + margin.top + ")");
// Define the div for the tooltip
const tooltip = divObj
.append("div")
.style("position", "absolute")
.style("z-index", "10")
.style("visibility", "hidden")
.text("I am a simple tooltip");
divObj.append("svg:svg")
.append("circle")
.attr("stroke", "black")
.attr("fill", "aliceblue")
.attr("r", 50)
.attr("cx", 52)
.attr("cy", 52)
.on("mouseover", function(){return tooltip.style("visibility", "visible");})
.on("mousemove", function(){return tooltip.style("top", (d3.event.pageY-10)+"px").style("left",(d3.event.pageX+10)+"px");})
.on("mouseout", function(){return tooltip.style("visibility", "hidden");})
}
render() {
return <div ref={node => this.node = node} className="example_div"> </div>
}
}
export default Linechart;
答案 0 :(得分:1)
在调试d3代码时,总是查看一下DOM / Element检查器。在这种情况下,它告诉我您具有以下结构:
您附加了一个div
和一个svg
,另外一个svg
位于内部。由于这是错误的,因此它不知道要怎么做,即使它想显示工具提示,也不能这样做-因为在SVG世界中,DIV是完全未知的。
我认为您犯了一个错误,即意外地将divObj
改成svg
而不是div
,所以我更改了代码以追加大小svg
,而没有覆盖divObj
。
var margin = {
top: 30,
right: 30,
bottom: 30,
left: 60
},
width = 960 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
var divObj = d3.select(".example_div");
divObj
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Define the div for the tooltip
const tooltip = divObj
.append("div")
.style("position", "absolute")
.style("z-index", "10")
.style("visibility", "hidden")
.text("I am a simple tooltip");
divObj.append("svg:svg")
.append("circle")
.attr("stroke", "black")
.attr("fill", "aliceblue")
.attr("r", 50)
.attr("cx", 52)
.attr("cy", 52)
.on("mouseover", function() {
return tooltip.style("visibility", "visible");
})
.on("mousemove", function() {
return tooltip.style("top", (d3.event.pageY - 10) + "px").style("left", (d3.event.pageX + 10) + "px");
})
.on("mouseout", function() {
return tooltip.style("visibility", "hidden");
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>
<div class="example_div"></div>
现在,存在另一个问题,因为您有两个SVG而不是一个。我建议以下。我所做的只是确保仅存在一个SVG(具有调整大小的SVG),并将圆圈添加到该SVG中,而不是添加到新的SVG中。
var margin = {
top: 30,
right: 30,
bottom: 30,
left: 60
},
width = 960 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
var divObj = d3.select(".example_div");
var svg = divObj
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Define the div for the tooltip
const tooltip = divObj
.append("div")
.style("position", "absolute")
.style("z-index", "10")
.style("visibility", "hidden")
.text("I am a simple tooltip");
svg
.append("circle")
.attr("stroke", "black")
.attr("fill", "aliceblue")
.attr("r", 50)
.attr("cx", 52)
.attr("cy", 52)
.on("mouseover", function() {
return tooltip.style("visibility", "visible");
})
.on("mousemove", function() {
return tooltip.style("top", (d3.event.pageY - 10) + "px").style("left", (d3.event.pageX + 10) + "px");
})
.on("mouseout", function() {
return tooltip.style("visibility", "hidden");
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>
<div class="example_div"></div>