Select sync workaround

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/en/v5.3.0/build/ol.js"></script>
<script src="https://unpkg.com/[email protected]/lib/index.umd.js"></script>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/lib/style.css">
<div id="app">
  <p>Center: {{ center }} Zoom: {{ zoom }}</p>
  <p>Features: {{ features }} </p>
  <p>Selected: {{ selectedFeatures }}</p>
  <vl-map ref="map" data-projection="EPSG:4326" @pointermove="onMapPointerMove" :style="{cursor: mapCursor}">
    <vl-view :zoom.sync="zoom" :center.sync="center"></vl-view>
    
    <vl-layer-tile>
      <vl-source-osm></vl-source-osm>
    </vl-layer-tile>
    
    <vl-interaction-select :features.sync="selected">
      <vl-style-box>
        <vl-style-icon src="https://img.icons8.com/ultraviolet/50/000000/place-marker.png" :anchor="[0.5, 1]"></vl-style-icon>
      </vl-style-box>
    </vl-interaction-select>
      
    <vl-layer-vector>
      <vl-source-vector>
        <vl-feature v-for="feature in features" :key="feature" :id="feature.id">
          <vl-geom-point :coordinates.sync="feature.geometry.coordinates"></vl-geom-point>
        </vl-feature>
      
        <vl-style-box>
          <vl-style-icon src="https://img.icons8.com/office/50/000000/place-marker.png" :anchor="[0.5, 1]"></vl-style-icon>
        </vl-style-box>
      </vl-source-vector>
    </vl-layer-vector>
    
    <vl-overlay v-for="feature in selectedFeatures" 
                :key="feature.id" 
                :id="feature.id"
                :position="feature.geometry.coordinates" 
                :auto-pan="true" 
                :auto-pan-animation="{ duration: 300 }">
                <div style="background: grey">
                  {{ feature }}
                </div>
    </vl-overlay>
  </vl-map>  
  <a href="https://icons8.com/icon/30622/place-marker">Place Marker icon by Icons8</a>
</div>

CSS

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

JavaScript

new Vue({
	el: '#app',
  data () {
  	return {
    	zoom: 3,
      center: [25.25135774256233, 45.39334701133322],
      selected: [],
      mapCursor: 'default',
      features: [
      	{
        	"type": "Feature",
          "id": "marker",
          "properties": {},
          "geometry": {
          	"type": "Point",
            "coordinates": [25.25135774256233, 45.39334701133322],
          },
        },
      ],
    }
  },
  computed: {
  	selectedFeatureIds () {
    	return this.selected.map(feature => feature.id)
    },
  	selectedFeatures () {
    	return this.features.filter(feature => this.selectedFeatureIds.includes(feature.id))
    },
  },
  mounted () {
  	setInterval(() => {
    	let feature = this.features[0]
      feature.geometry.coordinates = [
        feature.geometry.coordinates[0] + Math.random(),
        feature.geometry.coordinates[1] + Math.random()
      ]
    }, 2000)
  },
  methods: {
  	onMapPointerMove ({ pixel }) {
      let hit = this.$refs.map.forEachFeatureAtPixel(pixel, () => true)

			if (hit) {
      	this.mapCursor = 'pointer'
      } else {
      	this.mapCursor = 'default'
      }
    },
  },
})