Style function v0.12

by Vladimir Vershinin

HTML

<script src="https://unpkg.com/vue@latest/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.3.1/build/ol.js"></script>
<script src="https://unpkg.com/[email protected]/dist/vuelayers.umd.js"></script>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/vuelayers.css">
<div id="app">
  <vl-map ref="map" data-projection="EPSG:4326">
    <vl-view ref="view" :zoom.sync="zoom" :center.center="center"></vl-view>

    <vl-layer-tile>
      <vl-source-osm></vl-source-osm>
    </vl-layer-tile>

    <vl-layer-vector id="new-way">
      <vl-source-vector :features="features1">
        <vl-style-func :func="createStyleFunc()"></vl-style-func>
      </vl-source-vector>
    </vl-layer-vector>
    
        <vl-layer-vector id="deprecated">
      <vl-source-vector :features="features2">
        <vl-style-func :factory="createStyleFunc"></vl-style-func>
      </vl-source-vector>
    </vl-layer-vector>
  </vl-map>
</div>

CSS

html, body, #app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

#app {
  display: flex;
  flex-direction: column;
}

.vl-map {
  overflow: hidden;
}

JavaScript

new Vue({
  el: '#app',
  data() {
    return {
      zoom: 2,
      center: [0, 0],
      features1: [{
        type: 'Feature',
        geometry: {
          type: 'LineString',
          coordinates: [
            [10, 10],
            [-10, -10],
          ],
        },
      }],
      features2: [{
        type: 'Feature',
        geometry: {
          type: 'LineString',
          coordinates: [
            [20, 20],
            [-20, 20],
          ],
        },
      }],
    }
  },
  methods: {
    createStyleFunc() {
      return feature => {
        const geometry = feature.getGeometry()
        var styles = []
        styles.push(VueLayers.olExt.createStyle({
          geom: geometry,
          strokeColor: [33, 31, 48, 1],
          strokeWidth: 3
        }))

        geometry.forEachSegment(function(start, end) {
          var dx = end[0] - start[0]
          var dy = end[1] - start[1]
          var rotation = -Math.atan2(dy, dx)
          // arrows
          styles.push(VueLayers.olExt.createStyle({
            geom: VueLayers.olExt.createPointGeom(start),
            imageRadius: 6,
            strokeColor: [33, 31, 48, 1],
            fillColor: [33, 31, 48, 1],
            strokeWidth: 1
          }))

          styles.push(VueLayers.olExt.createStyle({
            geom: VueLayers.olExt.createPointGeom(end),
            imageSrc: 'https://img.icons8.com/carbon-copy/2x/arrow.png',
            imageRotation: rotation,
            imageOpacity: 1,
            imageScale: 0.2
          }))
        })
        return styles
      }
    },
  },
})