Vue+Openlayer使用modify修改要素的完整代码

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› JavaScript›JavaScript编程经验

原作者: [db:作者] 来自: [db:来源] 收藏邀请

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>

到此这篇关于Vue+Openlayer使用modify修改要素的文章就介绍到这了,更多相关Vue Openlayer修改要素内容请搜索极客世界以前的文章或继续浏览下面的相关文章希望大家以后多多支持极客世界！