将 ol-ext 导入到 React - Open Layers 6 项目中

Question

我正在尝试建立一个 React 项目，我想在其中使用 ol-ext 提供的一些工具。我环顾四周，从库的创建者那里找到了一些Codesandbox项目，但由于在项目中导入库的方式导致错误，我无法使它们正常工作。

语法是否有问题或与 ol-ext 和其他开放层版本不兼容？

Answer 1

对于遇到相同问题的人，我设法使其工作，并实现了交互转换功能示例。下面是代码：

.JS：

// Import stylesheets
import './style.css';
import "ol/ol.css";
import "ol-ext/dist/ol-ext.css";
import Transform from "ol-ext/interaction/Transform";
import Stamen from 'ol/source/Stamen';
import { Map, View } from "ol";
import { defaults } from "ol/control";
import * as olEvents from 'ol/events';
import TileLayer from 'ol/layer/Tile';
import { Style, Fill, Text, Icon, Stroke, RegularShape } from "ol/style";
import {Polygon, LineString, Point, Circle} from 'ol/geom';
import VectorLayer from "ol/layer/Vector";
import VectorSource from "ol/source/Vector";
import Feature from "ol/Feature";

var interaction = new Transform ({
enableRotatedTransform: false,
/* Limit interaction inside bbox * /
condition: function(e, features) {
return ol.extent.containsXY([-465960, 5536486, 1001630, 6514880], e.coordinate[0], e.coordinate[1]);
},
/* */
addCondition: olEvents.condition,
// filter: function(f,l) { return f.getGeometry().getType()==='Polygon'; },
// layers: [vector],
hitTolerance: 2,
translateFeature: false,
scale: true,
rotate: true,
translate: true,
stretch: true
});
var circle = new RegularShape({
fill: new Fill({color:[255,255,255,0.01]}),
stroke: new Stroke({width:1, color:[0,0,0,0.01]}),
radius: 8,
points: 10
});
interaction.setStyle ('rotate',
new Style({
text: new Text ({
text:'uf0e2', 
font:"16px Fontawesome",
textAlign: "left",
fill:new Fill({color:'red'})
}),
image: circle
}));
// Center of rotation
interaction.setStyle ('rotate0',
new Style({
text: new Text ({
text:'uf0e2', 
font:"20px Fontawesome",
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'red' })
}),
}));
// Style the move handle
interaction.setStyle('translate',
new Style({
text: new Text ({
text:'uf047', 
font:"20px Fontawesome", 
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'red' })
})
}));

// Layers
var layers = [
new TileLayer({ 
title:'terrain-background',
source: new Stamen({ layer: 'terrain' })
})
]
// The map
var map = new Map({
target: null,
view: new View({
zoom: 5,
center: [261720, 5951081]
}),
controls: defaults({ "attribution": false }),
layers: layers
});
// Style
function getStyle(feature) {
return [ new Style({
image: new RegularShape({
fill: new Fill({ color: [0,0,255,0.4]}),
stroke: new Stroke({color: [0,0,255,1],width: 1}),
radius: 10,
points: 3,
angle: feature.get('angle')||0
}),
fill: new Fill({color: [0,0,255,0.4]}),
stroke: new Stroke({color: [0,0,255,1],width: 1})
})];
}
// New vector layer
var vector = new VectorLayer({
name: 'Vecteur',
source: new VectorSource({ wrapX: false }),
style: getStyle
})
map.addLayer(vector);
vector.getSource().addFeature(new Feature(new Polygon([[[34243, 6305749], [-288626, 5757848], [210354, 5576845], [300000, 6000000], [34243, 6305749]]])));
vector.getSource().addFeature(new Feature(new LineString([[406033, 5664901], [689767, 5718712], [699551, 6149206], [425601, 6183449]])));
vector.getSource().addFeature(new Feature(new Point(    [269914, 6248592])));
vector.getSource().addFeature(new Feature(new Circle( [500000, 6400000], 100000 )));
// Set cursor style
Transform.prototype.Cursors['rotate'] = 'url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAXAgMAAACdRDwzAAAAAXNSR0IArs4c6QAAAAlQTFRF////////AAAAjvTD7AAAAAF0Uk5TAEDm2GYAAAABYktHRACIBR1IAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH2wwSEgUFmXJDjQAAAEZJREFUCNdjYMAOuCCk6goQpbp0GpRSAFKcqdNmQKgIILUoNAxIMUWFhoKosNDQBKDgVAilCqcaQBogFFNoGNjsqSgUTgAAM3ES8k912EAAAAAASUVORK5CYII=') 5 5, auto';
Transform.prototype.Cursors['rotate0'] = 'url('data:image/png;base64,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') 5 5, auto';
map.addInteraction(interaction);

class App extends Component {
state = {
name: 'React',
styles: false,
scale: true,
stretch: true,
disableStretch: false,
rotate: true,
translate: true,
translateFeature: false,
forceMatching: false,
info: "Hello there"
};

setHandleStyleInput = (event) => {
this.setState({styles: event.target.checked})
if (!interaction instanceof Transform) return;
if (event.target.checked) {
// Style the rotate handle
var circle = new RegularShape({
fill: new Fill({color:[255,255,255,0.01]}),
stroke: new Stroke({width:1, color:[0,0,0,0.01]}),
radius: 8,
points: 10
});
interaction.setStyle ('rotate',
new Style({
text: new Text ({
text:'uf0e2', 
font:"16px Fontawesome",
textAlign: "left",
fill:new Fill({color:'yellow'})
}),
image: circle
}));
// Center of rotation
interaction.setStyle ('rotate0',
new Style({
text: new Text ({
text:'uf0e2', 
font:"20px Fontawesome",
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'yellow' })
}),
}));
// Style the move handle
interaction.setStyle('translate',
new Style({
text: new Text ({
text:'uf047', 
font:"20px Fontawesome", 
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'yellow' })
})
}));
interaction.setStyle ('scaleh1', 
new Style({
text: new Text ({
text:'uf07d', 
font:"bold 20px Fontawesome", 
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'yellow' })
})
}));
interaction.style.scaleh3 = interaction.style.scaleh1;
interaction.setStyle('scalev',
new Style({
text: new Text ({
text:'uf07e', 
font:"bold 20px Fontawesome", 
fill: new Fill({ color:[255,255,255,0.8] }),
stroke: new Stroke({ width:2, color:'yellow' })
})
}));
interaction.style.scalev2 = interaction.style.scalev;
} else {
interaction.setDefaultStyle();
}
// Refresh
interaction.set('translate', interaction.get('translate'));

}
setPropertieScale = (p) =>{
this.setState({scale: p.target.checked})
if (p.target.checked) this.setState({ disableStretch: false});
else this.setState({ disableStretch: true});
}
setPropertieStretch = (p) =>{
this.setState({stretch: p.target.checked})
}
setPropertieRotate = (p) =>{
this.setState({rotate: p.target.checked})
}
setPropertieTranslate = (p) =>{
this.setState({translate: p.target.checked})
}
setPropertieTranslateFeature = (p) =>{
this.setState({translateFeature: p.target.checked})
}
componentDidMount() {

map.setTarget("map");
}
componentDidUpdate(prevState) {
/** Style the transform handles for the current interaction
*/
if(this.state.scale !== prevState.scale || this.state.stretch !== prevState.stretch || this.state.rotate !== prevState.rotate || this.state.translate !== prevState.translate || this.state.styles !== prevState.styles){

var interaction = new Transform ({
enableRotatedTransform: false,
/* Limit interaction inside bbox * /
condition: function(e, features) {
return ol.extent.containsXY([-465960, 5536486, 1001630, 6514880], e.coordinate[0], e.coordinate[1]);
},
/* */
addCondition: olEvents.condition,
// filter: function(f,l) { return f.getGeometry().getType()==='Polygon'; },
// layers: [vector],
hitTolerance: 2,
translateFeature: this.state.translateFeature,
scale: this.state.scale,
rotate: this.state.rotate,
translate: this.state.translate,
stretch: this.state.stretch
});
interaction.set('translate', interaction.get('translate'));
// Style handles
}
}
render() {
var info = "Heyyou"
// Events handlers
var startangle = 0;
var d=[0,0];
// Handle rotate on first point
var firstPoint = false;
interaction.on (['select'], function(e) {
if (firstPoint && e.features && e.features.getLength()) {
interaction.setCenter(e.features.getArray()[0].getGeometry().getFirstCoordinate());
}
});
interaction.on (['rotatestart','translatestart'], function(e){
// Rotation
startangle = e.feature.get('angle')||0;
// Translation
d=[0,0];
});
interaction.on('rotating', (e)=>{
info= "rotate: "+((e.angle*180/Math.PI -180)%360+180).toFixed(2)
// Set angle attribute to be used on style !
e.feature.set('angle', startangle - e.angle);
});
interaction.on('translating', (e) =>{
d[0]+=e.delta[0];
d[1]+=e.delta[1];
info= "translate: "+d[0].toFixed(2)+","+d[1].toFixed(2)

if (firstPoint) {
interaction.setCenter(e.features.getArray()[0].getGeometry().getFirstCoordinate());
}
});
interaction.on('scaling', (e) => {
info= "scale: "+e.scale[0].toFixed(2)+","+e.scale[1].toFixed(2)
if (firstPoint) {
interaction.setCenter(e.features.getArray()[0].getGeometry().getFirstCoordinate());
}
});
interaction.on(['rotateend', 'translateend', 'scaleend'], (e) =>{
this.setState({info: info})
info= ""
});
return (
<div>
<div id="map" style={{width:"500px", height:"400px"}}></div>
<div className="options" >
<h2>Options:</h2>
<ul><li>
<input
className="style"
type="checkbox"
checked={this.state.styles}
onChange={this.setHandleStyleInput} />
<label> styles transform handles (using fontawesome)</label>
</li><li>
<input
className="scale"
type="checkbox"
checked={this.state.scale}
onChange={this.setPropertieScale} /><label> enable scale</label>
</li><li>
<input
className="stretch"
type="checkbox"
checked={this.state.stretch}
onChange={this.setPropertieStretch} disabled={this.state.disableStretch} />
<label> enable stretch</label>
</li><li>
<input
className="rotate"
type="checkbox"
checked={this.state.rotate}
onChange={this.setPropertieRotate} />
<label> enable rotate</label>
</li><li>
<input
className="translate"
type="checkbox"
checked={this.state.translate}
onChange={this.setPropertieTranslate} />
<label> enable translate</label>
</li><li>
<input
className="translateFeature"
type="checkbox"
checked={this.state.translateFeature}
onChange={this.setPropertieTranslateFeature} />
<label> translate when click on feature</label>
</li><li>
SetRotateCenter:
<button onClick={()=>{firstPoint=false; interaction.setCenter()}}>objects</button>
<button onClick={()=>{firstPoint=false; interaction.setCenter(map.getView().getCenter())}}>view center</button>
<button onClick={()=>{firstPoint=true;}}>first point</button>
</li><li>
<hr/>
Use <i>Shift</i> to add object to tranform
<hr/>
Use <i>Shift</i> key to preserve proportions when scaling (see keepAspectRatio).
<br />
Use <i>Ctrl</i> key to modify the center when scaling.
</li></ul>
<div style={{background:"white", padding:"0 0.45em"}}><span id="info"></span>{this.state.info}</div>
</div>
</div>
);
}
}

.HTML：

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<div id="root"></div>

.CSS：

h1, p {
font-family: Lato;
}
a.icss-github-corner,
a.icss-github-corner-left {
font-size: 2.5em;
position: fixed;
top:0;
right: 0;
z-index: 1000;
color: #fff;
background-color: #333;
padding: .5em 2em 0;
text-align: center;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-transform-origin: 3.9em 3em;
-ms-transform-origin: 3.9em 3em;
transform-origin: 3.9em 3em;
overflow: hidden;
}
a.icss-github-corner-left {
left: 0;
right: auto;
-webkit-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-transform-origin: 1em 3.1em;
-ms-transform-origin: 1em 3.1em;
transform-origin: 1em 3.1em;
}
a.icss-github-corner:hover i,
a.icss-github-corner-left:hover i{
-webkit-animation: vertical 2s ease;
animation: vertical 2s ease;
}
a.icss-github-corner i,
a.icss-github-corner-left i,
i.icss-github-corner {
color: #fff;
position: relative;
display:inline-block;
font-style: normal;
background-color:currentColor;
-webkit-box-sizing: border-box;
box-sizing: border-box;
vertical-align: middle;
width: .8em;
height: .6em;
-webkit-border-radius: 45% 45% 45% 45% / 50%;
border-radius: 45% 45% 45% 45% / 50%;
background-color: currentColor;
-webkit-box-shadow: 0 .35em 0 -.2em, 
0 .38em 0 -.2em,
0 .41em 0 -.2em,
0 .44em 0 -.2em,
0 .47em 0 -.2em;
box-shadow: 0 .35em 0 -.2em, 
0 .38em 0 -.2em,
0 .41em 0 -.2em,
0 .44em 0 -.2em,
0 .47em 0 -.2em;
margin: .12em .1em .23em;
}
a.icss-github-corner i:before,
a.icss-github-corner-left i:before,
i.icss-github-corner:before {
content: "";
border-width: 0; 
position: absolute;
-webkit-box-sizing: border-box;
box-sizing: border-box;
border-width: .15em .15em;
border-style: solid;
-webkit-border-radius: 0.02em 60% 100% 80%;
border-radius: 0.02em 60% 100% 80%;
left: 0;
top: -.07em;
-webkit-transform: rotate(20deg);
-ms-transform: rotate(20deg);
transform: rotate(20deg);
}
a.icss-github-corner i:after,
a.icss-github-corner-left i:after,
i.icss-github-corner:after {
content: "";
border-width: 0; 
position: absolute;
-webkit-box-sizing: border-box;
box-sizing: border-box;
border-width: .15em .15em;
border-style: solid;
-webkit-border-radius: 0.02em 80% 100% 60%;
border-radius: 0.02em 80% 100% 60%;
left: .5em;
top: -.07em;
-webkit-transform: rotate(65deg);
-ms-transform: rotate(65deg);
transform: rotate(65deg);
}
@-webkit-keyframes vertical {
0%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
4%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
8%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
12%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
16%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
20%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
22%,100%{-webkit-transform:translate(0,0);transform:translate(0,0)}
}
@keyframes vertical {
0%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
4%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
8%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
12%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
16%{-webkit-transform:translate(0,-3px);transform:translate(0,-3px)}
20%{-webkit-transform:translate(0,3px);transform:translate(0,3px)}
22%,100%{-webkit-transform:translate(0,0);transform:translate(0,0)}
}
/**/
body {
font-family: 'Lucida Grande',Verdana,Geneva,Lucida,Arial,Helvetica,sans-serif;
font-size: 16px;
}
a, i, b {
color: #337ab7;
text-decoration: none;
}
button i {
color: #fff;
}
.ol-control.ol-bar .ol-control button i {
color: #fff;
}
a:hover {
text-decoration: underline;
}
a.title {
text-decoration: none;
}
h1 {
background: #1f6b75 url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAMAAABEpIrGAAACE1BMVEX///8A//8AgICA//8AVVVAQID///8rVVVJtttgv98nTmJ2xNgkW1ttyNsmWWZmzNZYxM4gWGgeU2JmzNNr0N1Rwc0eU2VXxdEhV2JqytQeVmMhVmNoydUfVGUgVGQfVGQfVmVqy9hqy9dWw9AfVWRpydVry9YhVmMgVGNUw9BrytchVWRexdGw294gVWQgVmUhVWPd4N6HoaZsy9cfVmQgVGRrytZsy9cgVWQgVWMgVWRsy9YfVWNsy9YgVWVty9YgVWVry9UgVWRsy9Zsy9UfVWRsy9YgVWVty9YgVWRty9Vsy9aM09sgVWRTws/AzM0gVWRtzNYgVWRuy9Zsy9cgVWRGcHxty9bb5ORbxdEgVWRty9bn6OZTws9mydRfxtLX3Nva5eRix9NFcXxOd4JPeINQeIMiVmVUws9Vws9Vw9BXw9BYxNBaxNBbxNBcxdJexdElWWgmWmhjyNRlx9IqXGtoipNpytVqytVryNNrytZsjZUuX210k5t1y9R2zNR3y9V4lp57zth9zdaAnKOGoaeK0NiNpquV09mesrag1tuitbmj1tuj19uktrqr2d2svcCu2d2xwMO63N+7x8nA3uDC3uDFz9DK4eHL4eLN4eIyYnDX5OM5Z3Tb397e4uDf4uHf5uXi5ePi5+Xj5+Xk5+Xm5+Xm6OY6aHXQ19fT4+NfhI1Ww89gx9Nhx9Nsy9ZWw9Dpj2abAAAAWnRSTlMAAQICAwQEBgcIDQ0ODhQZGiAiIyYpKywvNTs+QklPUlNUWWJjaGt0dnd+hIWFh4mNjZCSm6CpsbW2t7nDzNDT1dje5efr7PHy9PT29/j4+Pn5+vr8/f39/f6DPtKwAAABTklEQVR4Xr3QVWPbMBSAUTVFZmZmhhSXMjNvkhwqMzMzMzPDeD+xASvObKePPa+ffHVl8PlsnE0+qPpBuQjVJjno6pZpSKXYl7/bZyFaQxhf98hHDKEppwdWIW1frFnrxSOWHFfWesSEWC6R/P4zOFrix3TzDFLlXRTR8c0fEEJ1/itpo7SVO9Jdr1DVxZ0USyjZsEY5vZfiiAC0UoTGOrm9PZLuRl8X+Dq1HQtoFbJZbv61i+Poblh/97TC7n0neCcK0ETNUrz1/xPHf+DNAW9Ac6t8O8WH3Vp98f5lCaYKAOFZMLyHL4Y0fe319idMNgMMp+zWVSybUed/+/h7I4wRAG1W6XDy4XmjR9HnzvDRZXUAYDFOhC1S/Hh+fIXxen+eO+AKqbs+wAo30zDTDvDxKoJN88sjUzDFAvBzEUGFsnADoIvAJzoh2BZ8sner+Ke/vwECuQAAAABJRU5ErkJggg==") no-repeat scroll 10px center;
color: #fff;
font-size: 1.5em;
padding: 0.5em 50px;
margin:0;
}
h2 {
color: #337ab7;
font-size:1.1em;
margin: 0.5em 0;
}
.info {
background:#f5f5f5;
padding:0.5em;
margin: 1em 0;
}
.info ul {
margin:0;
}
#map {
float:left;
margin-right:1em;
background:#ddd;
}
.ol-attribution img {
vertical-align:middle;
}
.layerSwitcher {
display:inline-block;
background:#cdf;
padding:0.5em;
}
.btn {
color:#fff;
background:#369;
padding:0.5em;
text-decoration:none;
cursor:pointer;
display:inline-block;
margin-right:0.5em;
}
.block,
.options {
display: table;
margin: 0.5em;
position: relative;
z-index: 1;
margin:1em;
}
.options {
background: #def;
padding: 0.5em;
}
.options ul {
list-style: none;
padding-left: 0.5em;
}
i[class*="icss-"] {
position: relative;
display:inline-block;
font-style: normal;
background-color:currentColor;
box-sizing: border-box;
vertical-align: middle;
font-size: 1.5em;
}
i[class*="icss-"]:before, 
i[class*="icss-"]:after {
content: "";
border-width: 0; 
position: absolute;
}
i.icss-book {
width:1em;
height:.8em;
background-color: transparent; 
margin: 0 .03em .08em 0;
}
i.icss-book:before {
height: .8em;
width: 0.7em;
box-shadow: inset 0 0 0 0.15em, 
inset 0 -.48em,
.07em .07em;
border: 0.07em solid transparent;
border-width: 0 0.07em .07em 0;
border-radius: .05em .15em .1em .1em / .05em .05em .1em .05em;
transform: skewX(-20deg);
left: 0.15em;
}
i.icss-book:after {
width: .2em;
height: .2em;
background-color: transparent;
border: 0.05em solid currentColor;
border-color: currentColor transparent transparent currentColor;
border-radius: 50%;
transform: rotate(-45deg);
top: 0.67em;
left: .018em;
box-shadow: .13em -.15em 0 -.05em,
.51em -.33em 0 -.05em;
}
.experimental {
color:#fff; 
background: #f91; 
padding:.2em .5em;
display: inline-block;
-webkit-transform: rotate(-5deg);
transform: rotate(-5deg);
margin: -1em 0;
}
.ol-attribution ul {
font-size: .8em;
}

这里还有一个工作示例：StackBlitz