Vue+Openlayer使用modify修改要素的完整代码
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2022-04-10 21:07:34
vue+openlayer使用modify修改要素,具体内容如下所示:import{modify}from"ol/interaction"; 可自动捕捉 可修改点、线、面。不用自己声明要修...
vue+openlayer使用modify修改要素,具体内容如下所示:
import { modify } from "ol/interaction";
- 可自动捕捉
- 可修改点、线、面。不用自己声明要修改的要素类型
直接修改要素
核心代码:
// 修改要素核心代码 modifyfeature() { this.modify = new modify({ source: this.linestringlayer.getsource(), }); this.map.addinteraction(this.modify); },
完整代码:
<template> <div id="map" style="height: 100vh; width: 100vw"></div> </template> <script> import "ol/ol.css"; import { map, view, feature } from "ol"; import { osm, vector as vectorsource } from "ol/source"; import { vector as vectorlayer, tile as tilelayer } from "ol/layer"; import { point, linestring, polygon } from "ol/geom"; import { modify } from "ol/interaction"; export default { data() { return { map: {}, linestringlayer: {}, modify: {}, }; }, created() {}, mounted() { this.initmap(); this.addlayer(); this.modifyfeature(); }, computed: {}, methods: { initmap() { this.map = new map({ target: "map", layers: [ new tilelayer({ source: new osm(), }), ], view: new view({ projection: "epsg:4326", center: [104.2979180563, 30.528298024], zoom: 18, }), }); }, addlayer() { this.linestringlayer = new vectorlayer({ source: new vectorsource(), }); this.linestringlayer.getsource().addfeature( new feature({ geometry: new linestring([ [104.2979180563, 30.528298024], [104.2987389704, 30.527798338], ]), }) ); this.map.addlayer(this.linestringlayer); }, // 修改要素核心代码 modifyfeature() { this.modify = new modify({ source: this.linestringlayer.getsource(), //这里要用source }); this.map.addinteraction(this.modify); }, }, }; </script>
此外,可通过this.modify.setactive(false)来禁用modify对象,this.modify.getactive()获取激活状态
先选中要素,再修改要素
核心代码:
注意:这里一定要用features属性,不要用source!!!!
modifyfeature() { this.modify = new modify({ //注意:这里一定要用features属性,不要用source!!!! features: this.select.getfeatures(), }); this.map.addinteraction(this.modify); },
完整代码:
<template> <div id="map" style="height: 100vh; width: 100vw"></div> </template> <script> import "ol/ol.css"; import { map, view, feature } from "ol"; import { osm, vector as vectorsource, xyz } from "ol/source"; import { vector as vectorlayer, tile as tilelayer } from "ol/layer"; import select from "ol/interaction/select"; import { point, linestring, polygon } from "ol/geom"; import { modify } from "ol/interaction"; export default { data() { return { map: {}, linestringlayer: {}, draw: {}, modify: {}, select: {}, }; }, created() {}, mounted() { this.initmap(); this.pointermove(); this.addlayer(); this.selectfeature(); this.modifyfeature(); }, computed: {}, methods: { initmap() { this.map = new map({ target: "map", layers: [ new tilelayer({ source: new osm(), }), ], view: new view({ projection: "epsg:4326", center: [104.2979180563, 30.528298024], zoom: 18, }), }); }, pointermove() { this.map.on("pointermove", (e) => { const ishover = this.map.hasfeatureatpixel(e.pixel); this.map.gettargetelement().style.cursor = ishover ? "pointer" : ""; }); }, addlayer() { this.linestringlayer = new vectorlayer({ source: new vectorsource(), }); this.linestringlayer.getsource().addfeature( new feature({ geometry: new linestring([ [104.2979180563, 30.528298024], [104.2987389704, 30.527798338], ]), }) ); this.map.addlayer(this.linestringlayer); }, selectfeature() { this.select = new select(); this.map.addinteraction(this.select); }, modifyfeature() { this.modify = new modify({ //注意:这里一定要用features属性,不要用source!!!! features: this.select.getfeatures(), }); this.map.addinteraction(this.modify); }, }, }; </script>
ps:openlayers修改矢量要素
将以下代码放到demo下examples中即可运行
<!doctype html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta name="apple-mobile-web-app-capable" content="yes"> <title>modify feature</title> <link rel="stylesheet" href="../theme/default/style.css" rel="external nofollow" rel="external nofollow" type="text/css"> <link rel="stylesheet" href="style.css" rel="external nofollow" rel="external nofollow" type="text/css"> <style type="text/css"> </style> <script src="../lib/openlayers.js"></script> <script type="text/javascript"> var map, vectors, controls; function init(){ map = new openlayers.map('map'); var wms = new openlayers.layer.wms( "openlayers wms", "http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'}); openlayers.feature.vector.style['default']['strokewidth'] = '2'; vectors = new openlayers.layer.vector("vector layer"); var geometry = openlayers.geometry.fromwkt( 'polygon((110 20,120 20,120 10,110 10,110 20),(112 17,118 18,118 16,112 15,112 17))' ); vectors.addfeatures([new openlayers.feature.vector(geometry)]); map.addlayers([wms, vectors]); //画图形 controls = new openlayers.control.drawfeature(vectors, openlayers.handler.polygon); map.addcontrol(controls); controls.activate(); map.setcenter(new openlayers.lonlat(110, 20), 3); } function update() { // 修改 controls.deactivate(); controls = new openlayers.control.modifyfeature(vectors); map.addcontrol(controls); controls.activate(); } function deactivate(){ controls.deactivate(); } </script> </head> <body onload="init()"> <div id="map" class="smallmap"></div> <div><input type = "button" value = "修改" onclick = "update()"/> <input type = "button" value = "取消" onclick = "deactivate()"/> </div> </body> </html>
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