我花了相当长的时间编写此代码片段,以突出显示我在使用d3时遇到的一个非常令人沮丧的问题,并且会共同做出反应,特别是尝试根据组件状态动态更新工具提示时.
首先,我尝试尽力使代码片段简短完整(为简洁起见,您可以跳过css.只需注意单选按钮组,然后将鼠标悬停在图形组件中):
class GraphComponent extends React.Component {
constructor(props) {
super(props);
}
// Lifecycle Components
drawGraph() {
const { buttonName } = this.props;
const myData = [
{x:25, y:30, name:"tommy", age:"24"},
{x:108, y:82, name:"joey", age:"21"},
{x:92, y:107, name:"nicky", age:"23"},
{x:185, y:50, name:"peter", age:"27"},
{x:65, y:80, name:"mickie", age:"4"},
{x:165, y:80, name:"gregie", age:"14"},
{x:154, y:10, name:"tammie", age:"24"},
{x:102, y:42, name:"benny", age:"29"}
]
// var myD3tip = d3Tip()
var myD3tip = d3.tip()
.attr('class', 'd3-tip')
.offset([-20,0])
.html(d => `<p>D3 Tip: ${buttonName}: ${d[buttonName]}</p>`)
console.log('buttonName outside mouseover', buttonName)
const divToolTip = d3.select('div#myTooltip')
const points = d3.select('#mySvg').select('g.points')
points.call(myD3tip)
points
.selectAll('circle')
.data(myData)
.enter()
.append('circle')
.attr('cx', d => d.x)
.attr('cy', d => d.y)
.attr('r', 8)
.attr('fill', 'blue')
.on('mouseover', function(d) {
myD3tip.show(d)
console.log('buttonName in mouseover', buttonName)
divToolTip
.style('opacity', 1)
.style('left', d3.mouse(this)[0] + 'px')
.style('top', (d3.mouse(this)[1]) + 'px')
.html(`<p>Div Tip: ${buttonName}: ${d[buttonName]}</p>`)
})
.on('mouseout', function(d) {
myD3tip.hide(d)
divToolTip
.style('opacity', 0)
})
}
componentDidUpdate() {
this.drawGraph()
}
componentDidMount() {
this.drawGraph()
}
render() {
return (
<svg id="mySvg">
<g className="points" />
</svg>
)
}
}
class GraphContainer extends React.Component {
constructor(props) {
super(props);
this.state = {
ageOrName: "age"
}
this.handleChange = this.handleChange.bind(this);
}
handleChange = (event) => {
this.setState({ ageOrName: event.target.value })
}
render() {
const { ageOrName } = this.state;
const ageOrNameOptions = ["age", "name"];
const ageOrNameButtons =
<form>
<div>
{ageOrNameOptions.map((d, i) => {
return (
<label key={i+d}>
<input
type={"radio"}
value={ageOrNameOptions[i]}
checked={ageOrName === ageOrNameOptions[i]}
onChange={this.handleChange}
/>
<span>{ageOrNameOptions[i]}</span>
</label>
)
})}
</div>
</form>;
return (
<div>
{ageOrNameButtons}
<GraphComponent
buttonName={ageOrName}
/>
</div>
)
}
}
ReactDOM.render(
<GraphContainer />,
document.getElementById('root')
);
/* Div ToolTip */
#myTooltip {
opacity: 0;
position: absolute;
pointer-events: none;
background-color: lightblue;
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* ========== */
/* D3 ToolTip */
/* ========== */
.d3-tip {
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
box-sizing: border-box;
display: inline;
font-size: 10px;
width: 100%;
line-height: 1;
color: #444;
content: "\25BC";
position: absolute;
text-align: center;
}
/* Style northward tooltips differently */
.d3-tip.n:after {
margin: -1px 0 0 0;
top: 100%;
left: 0;
}
/* ========== */
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.2.0/umd/react.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.2.0/umd/react-dom.development.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-tip/0.8.0-alpha.1/d3-tip.js"></script>
<div id="root">
<svg id="mySvg">
</div>
<div id="myTooltip"></div>
概述是这样的:
我有2个组件,一个容器组件和一个图形组件.容器组件具有ageOrName状态,以及带有“ age”和“ name”的单选按钮,用于更新此状态.然后,容器组件将此值传递到图形组件中.
接受ageOrName作为道具的图形组件使用该道具来更改工具提示中的文本.但是,它不起作用.为了绝对的完整性,我列出了2个!不同的工具提示:
>使用d3-tip库创建的工具提示
>从页面上的div创建的自定义工具提示
我有两个console.logs()来在图形组件内部显示ageOrName prop的值,并且我已经意识到一些非常重要的问题.根据我是否在“ on.mouseover”调用之内,道具的价值有所不同.我不知道为什么.
对于我的应用程序来说,使它正常工作非常重要,对此,我们将提供任何帮助!
编辑:几乎可以肯定会在2天之内悬赏这个问题(现在想).即使会尽快提供答案也会奖励.
解决方法:
即使选择了名称输入后,{buttonName}仍会恢复使用年龄的主要原因是,在第一次drawGraph调用期间鼠标悬停功能已绑定到圆上,下次再次调用时,发生了d3更新逻辑,该逻辑没有将新的mouseover事件添加到现有圈子(基于新的{buttonName}.
我想出了两种解决方法:
>只需在mouseover函数本身中获取当前的{buttonName}.这是如何做:
.on('mouseover', function(d) {
var { buttonName } = that.props;
myD3tip.html(d => `<p>D3 Tip: ${buttonName}: ${d[buttonName]}</p>`).show(d);
class GraphComponent extends React.Component {
constructor(props) {
super(props);
}
// Lifecycle Components
drawGraph() {
var that = this;
const { buttonName } = this.props;
const myData = [
{x:25, y:30, name:"tommy", age:"24"},
{x:108, y:82, name:"joey", age:"21"},
{x:92, y:107, name:"nicky", age:"23"},
{x:185, y:50, name:"peter", age:"27"},
{x:65, y:80, name:"mickie", age:"4"},
{x:165, y:80, name:"gregie", age:"14"},
{x:154, y:10, name:"tammie", age:"24"},
{x:102, y:42, name:"benny", age:"29"}
]
// var myD3tip = d3Tip()
var myD3tip = d3.tip()
.attr('class', 'd3-tip')
.offset([-20,0])
.html(d => `<p>D3 Tip: ${buttonName}: ${d[buttonName]}</p>`)
const divToolTip = d3.select('div#myTooltip')
const points = d3.select('#mySvg').select('g.points')
points.call(myD3tip)
points
.selectAll('circle')
.data(myData)
.enter()
.append('circle')
.attr('cx', d => d.x)
.attr('cy', d => d.y)
.attr('r', 8)
.attr('fill', 'blue');
d3.select('#mySvg').select('g.points').selectAll('circle')
.on('mouseover', function(d) {
var { buttonName } = that.props;
myD3tip.html(d => `<p>D3 Tip: ${buttonName}: ${d[buttonName]}</p>`).show(d);
divToolTip
.style('opacity', 1)
.style('left', d3.mouse(this)[0] + 'px')
.style('top', (d3.mouse(this)[1]) + 'px')
.html(`<p>Div Tip: ${buttonName}: ${d[buttonName]}</p>`)
})
.on('mouseout', function(d) {
myD3tip.hide(d)
divToolTip
.style('opacity', 0)
})
}
componentDidUpdate() {
this.drawGraph()
}
componentDidMount() {
this.drawGraph()
}
render() {
return (
<svg id="mySvg">
<g className="points" />
</svg>
)
}
}
class GraphContainer extends React.Component {
constructor(props) {
super(props);
this.state = {
ageOrName: "age"
}
this.handleChange = this.handleChange.bind(this);
}
handleChange = (event) => {
this.setState({ ageOrName: event.target.value })
}
render() {
const { ageOrName } = this.state;
const ageOrNameOptions = ["age", "name"];
const ageOrNameButtons =
<form>
<div>
{ageOrNameOptions.map((d, i) => {
return (
<label key={i+d}>
<input
type={"radio"}
value={ageOrNameOptions[i]}
checked={ageOrName === ageOrNameOptions[i]}
onChange={this.handleChange}
/>
<span>{ageOrNameOptions[i]}</span>
</label>
)
})}
</div>
</form>;
return (
<div>
{ageOrNameButtons}
<GraphComponent
buttonName={ageOrName}
/>
</div>
)
}
}
ReactDOM.render(
<GraphContainer />,
document.getElementById('root')
);
/* Div ToolTip */
#myTooltip {
opacity: 0;
position: absolute;
pointer-events: none;
background-color: lightblue;
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* ========== */
/* D3 ToolTip */
/* ========== */
.d3-tip {
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
box-sizing: border-box;
display: inline;
font-size: 10px;
width: 100%;
line-height: 1;
color: #444;
content: "\25BC";
position: absolute;
text-align: center;
}
/* Style northward tooltips differently */
.d3-tip.n:after {
margin: -1px 0 0 0;
top: 100%;
left: 0;
}
/* ========== */
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-tip/0.8.0-alpha.1/d3-tip.js"></script>
<div id="root">
<svg id="mySvg"></svg>
</div>
<div id="myTooltip"></div>
>在每个drawGraph调用期间绑定mouseover事件:(类似这样)
points.select('circle')
....
.attr('fill', 'blue');
d3.select('#mySvg').select('g.points').selectAll('circle')
.on('mouseover', function(d) {
.....
class GraphComponent extends React.Component {
constructor(props) {
super(props);
}
// Lifecycle Components
drawGraph() {
const { buttonName } = this.props;
const myData = [
{x:25, y:30, name:"tommy", age:"24"},
{x:108, y:82, name:"joey", age:"21"},
{x:92, y:107, name:"nicky", age:"23"},
{x:185, y:50, name:"peter", age:"27"},
{x:65, y:80, name:"mickie", age:"4"},
{x:165, y:80, name:"gregie", age:"14"},
{x:154, y:10, name:"tammie", age:"24"},
{x:102, y:42, name:"benny", age:"29"}
]
// var myD3tip = d3Tip()
var myD3tip = d3.tip()
.attr('class', 'd3-tip')
.offset([-20,0])
.html(d => `<p>D3 Tip: ${buttonName}: ${d[buttonName]}</p>`);
const divToolTip = d3.select('div#myTooltip')
const points = d3.select('#mySvg').select('g.points')
points.call(myD3tip)
points
.selectAll('circle')
.data(myData)
.enter()
.append('circle')
.attr('cx', d => d.x)
.attr('cy', d => d.y)
.attr('r', 8)
.attr('fill', 'blue');
d3.select('#mySvg').select('g.points').selectAll('circle')
.on('mouseover', function(d) {
myD3tip.show(d)
divToolTip
.style('opacity', 1)
.style('left', d3.mouse(this)[0] + 'px')
.style('top', (d3.mouse(this)[1]) + 'px')
.html(`<p>Div Tip: ${buttonName}: ${d[buttonName]}</p>`)
})
.on('mouseout', function(d) {
myD3tip.hide(d)
divToolTip
.style('opacity', 0)
})
}
componentDidUpdate() {
this.drawGraph()
}
componentDidMount() {
this.drawGraph()
}
render() {
return (
<svg id="mySvg">
<g className="points" />
</svg>
)
}
}
class GraphContainer extends React.Component {
constructor(props) {
super(props);
this.state = {
ageOrName: "age"
}
this.handleChange = this.handleChange.bind(this);
}
handleChange = (event) => {
this.setState({ ageOrName: event.target.value })
}
render() {
const { ageOrName } = this.state;
const ageOrNameOptions = ["age", "name"];
const ageOrNameButtons =
<form>
<div>
{ageOrNameOptions.map((d, i) => {
return (
<label key={i+d}>
<input
type={"radio"}
value={ageOrNameOptions[i]}
checked={ageOrName === ageOrNameOptions[i]}
onChange={this.handleChange}
/>
<span>{ageOrNameOptions[i]}</span>
</label>
)
})}
</div>
</form>;
return (
<div>
{ageOrNameButtons}
<GraphComponent
buttonName={ageOrName}
/>
</div>
)
}
}
ReactDOM.render(
<GraphContainer />,
document.getElementById('root')
);
/* Div ToolTip */
#myTooltip {
opacity: 0;
position: absolute;
pointer-events: none;
background-color: lightblue;
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* ========== */
/* D3 ToolTip */
/* ========== */
.d3-tip {
line-height: 0.50;
font-weight: bold;
padding: 8px 8px;
padding-bottom: 0px;
border-radius: 10px;
border: 2px solid #444;
font-size: 0.9em;
}
/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
box-sizing: border-box;
display: inline;
font-size: 10px;
width: 100%;
line-height: 1;
color: #444;
content: "\25BC";
position: absolute;
text-align: center;
}
/* Style northward tooltips differently */
.d3-tip.n:after {
margin: -1px 0 0 0;
top: 100%;
left: 0;
}
/* ========== */
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-tip/0.8.0-alpha.1/d3-tip.js"></script>
<div id="root">
<svg id="mySvg"></svg>
</div>
<div id="myTooltip"></div>
(我个人选择第一种方法)
希望这可以帮助.