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annotate client/src/components/layers/LegendElement.vue @ 4324:36d384326407

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BottleneckDialogue: Prototype for delete of surveys implemented
author Thomas Junk <thomas.junk@intevation.de>
date Wed, 04 Sep 2019 14:39:51 +0200
parents ee4c47c3e7b2
children 827157bbc2a8
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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 <img
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4 v-if="!isVectorLayer"
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5 style="margin: 0 auto;display: flex;"
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6 :src="imgSrc"
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7 :key="id"
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8 />
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9 </div>
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10 </template>
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11
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12 <script>
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13 /* This is Free Software under GNU Affero General Public License v >= 3.0
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14 * without warranty, see README.md and license for details.
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15 *
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16 * SPDX-License-Identifier: AGPL-3.0-or-later
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17 * License-Filename: LICENSES/AGPL-3.0.txt
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18 *
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19 * Copyright (C) 2018 by via donau
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20 * – Österreichische Wasserstraßen-Gesellschaft mbH
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21 * Software engineering by Intevation GmbH
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22 *
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23 * Author(s):
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24 * Thomas Junk <thomas.junk@intevation.de>
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25 */
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26 import { mapState } from "vuex";
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27
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28 import { Map, View } from "ol";
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29 import Feature from "ol/Feature";
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30 import { Vector as VectorLayer } from "ol/layer";
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31 import { Vector as VectorSource } from "ol/source";
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32 import LineString from "ol/geom/LineString";
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33 import Point from "ol/geom/Point";
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34 import { HTTP } from "@/lib/http";
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35
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36 export default {
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37 props: ["layer"],
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38 data: function() {
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39 return {
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40 myMap: null,
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41 src: null,
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42 url: null
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43 };
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44 },
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45 computed: {
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46 ...mapState("map", ["layers", "ongoingRefresh"]),
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47 isVectorLayer() {
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48 return this.layer.getType() === "VECTOR";
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49 },
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50 imgSrc() {
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51 // if (this.layer.get("id") === "DISTANCEMARKSAXIS") {
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52 // return require("@/assets/distancemarks-axis.png");
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53 // }
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54 return this.src;
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55 },
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56 id() {
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57 return (
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58 "legendelement-" +
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59 this.layer
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60 .get("label")
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61 .toLowerCase()
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62 .replace(/\s/g, "")
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63 );
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64 },
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65 mstyle() {
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66 if (this.layer && this.layer.getStyle) {
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67 return this.layer.getStyle();
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68 }
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69 }
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70 },
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71 watch: {
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72 ongoingRefresh() {
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73 if (this.ongoingRefresh) return;
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74 if (
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75 this.layer.get("id") === "OPENSTREETMAP" ||
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76 this.layer.get("id") === "INLANDECDIS" ||
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77 this.layer.get("id") === "BOTTLENECKISOLINE" ||
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78 this.layer.get("id") === "DIFFERENCES"
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79 ) {
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80 // TODO: Do something useful?
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81 return;
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82 }
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83 if (this.isVectorLayer) {
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84 this.recreateLayers();
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85 } else {
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86 this.loadImageSrc();
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87 }
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88 },
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89 mstyle(newStyle, oldStyle) {
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90 // only recreate if there already was a style before
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91 if (oldStyle) {
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92 this.recreateLayers();
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93 }
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94 }
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95 },
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96 mounted() {
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97 if (this.layer.getType() == "VECTOR") {
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98 this.initMap();
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99 } else {
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100 if (
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101 this.layer.get("id") === "OPENSTREETMAP" ||
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102 this.layer.get("id") === "INLANDECDIS" ||
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103 this.layer.get("id") === "BOTTLENECKISOLINE" ||
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104 this.layer.get("id") === "DIFFERENCES"
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105 ) {
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106 // TODO: Do something useful?
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107 return;
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108 }
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109 if (this.layer.get("id") !== "DISTANCEMARKSAXIS") {
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110 this.url =
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111 `/internal/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=` +
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112 this.layer.getSource().getParams().LAYERS +
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113 `&legend_options=columns:4;fontAntiAliasing:true`;
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114 } else {
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115 this.url =
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116 `/internal/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&SCALE=80000&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=` +
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117 this.layer.getSource().getParams().LAYERS +
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118 `&legend_options=columns:1;fontAntiAliasing:true;forceLabels:off`;
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119 }
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120
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121 this.loadImageSrc();
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122 }
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123 },
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124 methods: {
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125 loadImageSrc() {
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126 HTTP.get(this.url, {
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127 headers: {
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128 "X-Gemma-Auth": localStorage.getItem("token")
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129 },
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130 responseType: "blob"
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131 }).then(response => {
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132 this.src = URL.createObjectURL(response.data);
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133 });
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134 },
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135 recreateLayers() {
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136 let vector = this.createVectorLayer();
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137
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138 this.myMap.removeLayer(this.myMap.getLayers()[0]);
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139 this.myMap.addLayer(vector);
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140 },
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141 initMap() {
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142 let vector = this.createVectorLayer();
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143
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144 this.myMap = new Map({
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145 layers: [vector],
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146 target: this.id,
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147 controls: [],
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148 interactions: [],
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149 view: new View({
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150 center: [0, 0],
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151 zoom: 3,
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152 projection: "EPSG:4326"
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153 })
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154 });
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155 },
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156 createVectorLayer() {
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157 let mapStyle = this.layer.getStyle();
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158
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159 let feature = new Feature({
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160 geometry: new LineString([[-1, -1], [0, 0], [1, 1]])
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161 });
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162
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163 // special case if we need to call the style function with a special
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164 // parameter or to detect a point layer
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165 let legendStyle = this.layer.get("forLegendStyle");
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166 if (legendStyle) {
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167 if (legendStyle) {
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168 feature.setGeometry(new Point([0, 0]));
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169 }
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170 mapStyle = this.layer.getStyleFunction()(
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171 feature,
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172 legendStyle.resolution,
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173 true
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174 );
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175 }
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176
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177 // we could add extra properties here, if they are needed for
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178 // the styling function in the future. An idea is to extend the
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179 // this.layer["forLegendStyle"] for it.
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180 // FIXME, this is a special case for the Fairway Dimensions style
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181 feature.set("level_of_service", "");
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182 return new VectorLayer({
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183 source: new VectorSource({
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184 features: [feature],
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185 wrapX: false
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186 }),
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187 style: mapStyle
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188 });
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189 }
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190 }
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191 };
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192 </script>
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193
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194 <style lang="scss" scoped>
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195 .legendelement {
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196 max-height: 1.5rem;
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197 width: 2rem;
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198 overflow: hidden;
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199 }
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200 </style>