Mercurial > gemma

annotate client/src/components/layers/LegendElement.vue @ 5219:de86a96d55c3 new-fwa

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author Thomas Junk <thomas.junk@intevation.de>
date Tue, 12 May 2020 10:04:06 +0200
parents 9b1da062cbee
children 453a33b0717d
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rev   line source
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1 <template>
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2 <div :id="id" class="legendelement">
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3 <div v-if="layer.get('id') === 'FAIRWAYMARKS'">
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4 <img
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5 v-if="!isVectorLayer"
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6 style="margin: 0 auto;display: flex;"
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7 src="@/assets/fm_legend.svg"
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8 :key="id"
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9 />
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10 </div>
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11 <div v-else="">
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12 <img
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13 v-if="!isVectorLayer"
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14 style="margin: 0 auto;display: flex;"
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15 :src="imgSrc"
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16 :key="id"
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17 />
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18 </div>
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19 </div>
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20 </template>
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21
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22 <script>
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23 /* This is Free Software under GNU Affero General Public License v >= 3.0
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24 * without warranty, see README.md and license for details.
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25 *
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26 * SPDX-License-Identifier: AGPL-3.0-or-later
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27 * License-Filename: LICENSES/AGPL-3.0.txt
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28 *
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29 * Copyright (C) 2018 by via donau
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30 * – Österreichische Wasserstraßen-Gesellschaft mbH
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31 * Software engineering by Intevation GmbH
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32 *
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33 * Author(s):
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34 * Thomas Junk <thomas.junk@intevation.de>
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35 */
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36 import { mapState } from "vuex";
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37
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38 import { Map, View } from "ol";
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39 import Feature from "ol/Feature";
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40 import { Vector as VectorLayer } from "ol/layer";
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41 import { Vector as VectorSource } from "ol/source";
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42 import Polygon from "ol/geom/Polygon";
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43 import LineString from "ol/geom/LineString";
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44 import Point from "ol/geom/Point";
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45 import { HTTP } from "@/lib/http";
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46 import { Stroke, Style, Fill } from "ol/style";
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47
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48 export default {
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49 props: ["layer"],
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50 data: function() {
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51 return {
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52 myMap: null,
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53 src: null,
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54 url: null
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55 };
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56 },
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57 computed: {
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58 ...mapState("map", ["layers", "ongoingRefresh"]),
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59 isVectorLayer() {
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60 return this.layer.getType() === "VECTOR";
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61 },
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62 imgSrc() {
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63 // if (this.layer.get("id") === "DISTANCEMARKSAXIS") {
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64 // return require("@/assets/distancemarks-axis.png");
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65 // }
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66 return this.src;
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67 },
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68 id() {
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69 return (
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70 "legendelement-" +
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71 this.layer
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72 .get("label")
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73 .toLowerCase()
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74 .replace(/\s/g, "")
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75 );
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76 },
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77 mstyle() {
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78 if (this.layer && this.layer.getStyle) {
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79 return this.layer.getStyle();
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80 }
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81 }
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82 },
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83 watch: {
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84 ongoingRefresh() {
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85 if (this.ongoingRefresh) return;
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86 if (
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87 this.layer.get("id") === "OPENSTREETMAP" ||
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88 this.layer.get("id") === "INLANDECDIS" ||
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89 this.layer.get("id") === "BOTTLENECKISOLINE" ||
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90 this.layer.get("id") === "DIFFERENCES"
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91 ) {
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92 // TODO: Do something useful?
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93 return;
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94 }
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95 if (this.isVectorLayer) {
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96 this.recreateLayers();
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97 } else {
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98 this.loadImageSrc();
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99 }
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100 },
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101 mstyle(newStyle, oldStyle) {
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102 // only recreate if there already was a style before
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103 if (oldStyle) {
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104 this.recreateLayers();
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105 }
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106 }
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107 },
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108 mounted() {
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109 if (this.layer.getType() == "VECTOR") {
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110 this.initMap();
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111 } else {
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112 if (
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113 this.layer.get("id") === "OPENSTREETMAP" ||
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114 this.layer.get("id") === "INLANDECDIS" ||
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115 this.layer.get("id") === "BOTTLENECKISOLINE" ||
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116 this.layer.get("id") === "DIFFERENCES"
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117 ) {
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118 // TODO: Do something useful?
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119 return;
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120 }
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121 if (this.layer.get("id") !== "DISTANCEMARKSAXIS") {
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122 this.url =
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123 `/internal/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=` +
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124 this.layer.getSource().getParams().LAYERS +
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125 `&legend_options=columns:4;fontAntiAliasing:true`;
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126 } else {
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127 this.url =
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128 `/internal/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&SCALE=80000&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=` +
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129 this.layer.getSource().getParams().LAYERS +
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130 `&legend_options=columns:1;fontAntiAliasing:true;forceLabels:off`;
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131 }
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132
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133 this.loadImageSrc();
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134 }
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135 },
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136 methods: {
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137 loadImageSrc() {
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138 HTTP.get(this.url, {
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139 headers: {
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140 "X-Gemma-Auth": localStorage.getItem("token")
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141 },
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142 responseType: "blob"
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143 }).then(response => {
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144 this.src = URL.createObjectURL(response.data);
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145 });
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146 },
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147 recreateLayers() {
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148 let vector = this.createVectorLayer();
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149
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150 this.myMap.removeLayer(this.myMap.getLayers().getArray()[0]);
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151
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152 this.myMap.addLayer(vector);
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153 },
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154 initMap() {
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155 let vector = this.createVectorLayer();
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156
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157 this.myMap = new Map({
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158 layers: [vector],
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159 target: this.id,
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160 controls: [],
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161 interactions: [],
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162 view: new View({
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163 enableRotation: false,
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164 center: [0, 0],
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165 zoom: 3,
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166 projection: "EPSG:4326"
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167 })
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168 });
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169 },
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170 createVectorLayer() {
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171 let mapStyle = this.layer.getStyle();
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172 let feature;
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173 // show bottleneck legend as polygon
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174 if (this.layer.get("id") === "BOTTLENECKS") {
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175 feature = new Feature({
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176 geometry: new Polygon([
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177 [
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178 [-1.7, -1.2],
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179 [-1.7, 0.5],
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180 [1.7, 1.2],
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181 [1.7, -0.5]
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182 ]
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183 ])
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184 });
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185 if (typeof mapStyle === "function") {
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186 mapStyle = mapStyle();
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187 }
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188 mapStyle = new Style({
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189 stroke: new Stroke({
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190 color: mapStyle.getStroke().getColor(),
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191 // reduce the stroke width for better layout in map legend.
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192 width: 2
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193 }),
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194 fill: new Fill({
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195 color: mapStyle.getFill().getColor()
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196 })
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197 });
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198 } else {
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199 feature = new Feature({
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200 geometry: new LineString([
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201 [-1, -1],
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202 [0, 0],
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203 [1, 1]
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204 ])
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205 });
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206 }
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207 // special case if we need to call the style function with a special
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208 // parameter or to detect a point layer
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209 let legendStyle = this.layer.get("forLegendStyle");
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210 if (legendStyle) {
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211 if (legendStyle) {
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212 feature.setGeometry(new Point([0, 0]));
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213 }
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214 mapStyle = this.layer.getStyleFunction()(
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215 feature,
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216 legendStyle.resolution,
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217 true
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218 );
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219 }
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220
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221 // we could add extra properties here, if they are needed for
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222 // the styling function in the future. An idea is to extend the
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223 // this.layer["forLegendStyle"] for it.
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224 // FIXME, this is a special case for the Fairway Dimensions style
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225 feature.set("level_of_service", "");
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226 return new VectorLayer({
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227 source: new VectorSource({
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228 features: [feature],
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229 wrapX: false
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230 }),
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231 style: mapStyle
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232 });
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233 }
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234 }
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235 };
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236 </script>
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237
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238 <style lang="scss" scoped>
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239 .legendelement {
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240 max-height: 1.5rem;
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241 width: 2rem;
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242 overflow: hidden;
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243 }
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244 </style>