javascript - 如何通过拖动整个底部边框线而不是右下角来调整div高度?
问题描述
我有一个反应组件。我可以通过添加resize: vertical;
overflow: auto;
我的 css 文件来调整高度。但是,我只能通过拖动边框的右下角来进行调整。是否可以将其更改为整个底线?或者任何其他反应api可以实现这一点?这是我如何通过拖动右下角来调整高度的示例。
这是我的组件。
<div class='map'>
<MyMapComponent
handleChange={this.handleChange}
handleSubmit={this.handleSubmit}
date ={this.state.date}
getMap={this.getMap}
updateStatus = {this.state.updateStatus}
filter={this.state.filter}
filterList={this.state.filterList}
inputProps={{
classes: {
input: classes.multilineColor
}
}}
>
{/*this.getMap()*/}
</MyMapComponent>
</div>
这是我的css文件。
.map{
border: 2px solid;
padding: 20px;
width: 300px;
resize: vertical;
overflow: auto;
}
解决方案
我按照这个水平调整大小面板示例来创建一个垂直的。
这是我编辑的调整大小面板
import React from "react"
import ReactDOM from "react-dom";
import './ResizablePanels.css';
class ResizablePanels extends React.Component {
eventHandler = null
constructor () {
super()
this.state = {
isDragging: false,
panels: [800, 300, 0]
}
}
componentDidMount () {
ReactDOM.findDOMNode(this).addEventListener('mousemove', this.resizePanel)
ReactDOM.findDOMNode(this).addEventListener('mouseup', this.stopResize)
ReactDOM.findDOMNode(this).addEventListener('mouseleave', this.stopResize)
}
startResize = (event, index) => {
this.setState({
isDragging: true,
currentPanel: index,
initialPos: event.clientY
})
}
stopResize = () => {
if (this.state.isDragging) {
console.log(this.state)
this.setState(({panels, currentPanel, delta}) => ({
isDragging: false,
panels: {
...panels,
[currentPanel]: (panels[currentPanel] || 0) - delta,
[currentPanel - 1]: (panels[currentPanel - 1] || 0) + delta
},
delta: 0,
currentPanel: null
}))
console.log(this.state)
}
}
resizePanel = (event) => {
if (this.state.isDragging) {
//console.log(event.clientY +" "+this.state.initialPos);
const delta = event.clientY - this.state.initialPos
this.setState({
delta: delta
})
}
}
render() {
const rest = this.props.children.slice(1);
// console.log(this.props);
return (
<div className="panel-container" onMouseUp={() => this.stopResize()}>
<div className="panel" style={{height: this.state.panels[0]}}>
{this.props.children[0]}
</div>
{[].concat(...rest.map((child, i) => {
return [
<div onMouseDown={(e) => this.startResize(e, i + 1)}
key={"resizer_" + i}
style={this.state.currentPanel === i+1 ? {top: this.state.delta} : {}}
className="resizer"></div>,
<div key={"panel_" + i} className="panel" style={{height: this.state.panels[i + 1]}}>
{child}
</div>
]
}))}
</div>
)
}
}
export default ResizablePanels;
这是我的这个面板的 css 文件
@import url('https://fonts.googleapis.com/css?family=Ubuntu');
html {
background: #333;
font-family: sans-serif;
}
h1 {
color: white;
}
.panel-container {
display: flex;
min-height: 100%;
justify-content: center;
flex-direction: column;
text-align: center;
}
.panel {
background: #EEE;
border: 0px solid gray;
padding: 1px;
}
.panel:first-child {
}
.resizer {
height: 8px;
background: darkGray;
position: relative;
cursor: row-resize;
flex-shrink: 0;
-webkit-user-select: none; /* Chrome all / Safari all */
-moz-user-select: none; /* Firefox all */
-ms-user-select: none; /* IE 10+ */
user-select: none; /* Likely future */
}
.resizer::after,
.resizer::before {
content: "";
border-left: 1px solid #333;
position: absolute;
top: 50%;
transform: translateX(-100%);
right: 0;
display: inline-block;
height: 20px;
margin: 0 2px;
}
.resizer::before {
top: 0;
}
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