<template>
    <div
        class="d-flex buttoncontainer shadow-xs mb-3 position-absolute"
        :style="showSplitscreen ? 'margin-bottom: 51vh !important' : ''"
    >
        <button
            class="zoomButton border-0 bg-white rounded-left ui-element border-right"
            @click="zoomIn"
        >
            <i class="fa fa-plus"></i>
        </button>
        <button class="zoomButton border-0 bg-white rounded-right ui-element" @click="zoomOut">
            <i class="fa fa-minus"></i>
        </button>
    </div>
</template>

<style lang="sass" scoped>
.buttoncontainer
  bottom: 0
  left: 50%
  margin-left: -$icon-width

.zoomButton
  min-height: $icon-width
  min-width: $icon-width
  z-index: 2
  outline: none
  color: #666
</style>
<script>
/* This is Free Software under GNU Affero General Public License v >= 3.0
 * without warranty, see README.md and license for details.
 *
 * SPDX-License-Identifier: AGPL-3.0-or-later
 * License-Filename: LICENSES/AGPL-3.0.txt
 *
 * Copyright (C) 2018 by via donau 
 *   – Österreichische Wasserstraßen-Gesellschaft mbH
 * Software engineering by Intevation GmbH
 *
 * Author(s):
 * Thomas Junk <thomas.junk@intevation.de>
 */
import { mapState } from "vuex";

export default {
  name: "zoom",
  computed: {
    ...mapState("map", ["openLayersMap"]),
    ...mapState("application", ["showSplitscreen"]),
    zoomLevel: {
      get() {
        return this.openLayersMap.getView().getZoom();
      },
      set(value) {
        this.openLayersMap.getView().animate({ zoom: value, duration: 300 });
      }
    }
  },
  methods: {
    zoomIn() {
      this.zoomLevel = this.zoomLevel + 1;
    },
    zoomOut() {
      this.zoomLevel = this.zoomLevel - 1;
    }
  }
};
</script>