Mercurial > gemma
annotate client/src/components/Pdftool.vue @ 2037:11cb57f85c60 unify_imports
Merged default into branch.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 25 Jan 2019 11:53:28 +0100 |
parents | b275d5e14087 |
children | 1dafdbfca100 |
rev | line source |
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1 <template> |
1480 | 2 <div |
3 :class="[ | |
4 'box ui-element rounded bg-white text-nowrap', | |
5 { expanded: showPdfTool } | |
6 ]" | |
7 > | |
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8 <div style="width: 20rem"> |
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9 <h6 class="mb-0 py-2 px-3 border-bottom d-flex align-items-center"> |
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10 <font-awesome-icon icon="file-pdf" class="mr-2"></font-awesome-icon> |
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11 <translate>Generate PDF</translate> |
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12 <font-awesome-icon |
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13 icon="times" |
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14 class="ml-auto text-muted" |
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15 @click="$store.commit('application/showPdfTool', false)" |
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16 ></font-awesome-icon> |
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17 </h6> |
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18 <div class="p-3"> |
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19 <b><translate>Choose format:</translate></b> |
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20 <select v-model="form.format" class="form-control d-block w-100"> |
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21 <option value="landscape"><translate>landscape</translate></option> |
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22 <option value="portrait"><translate>portrait</translate></option> |
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23 </select> |
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24 <select v-model="form.resolution" class="form-control d-block w-100"> |
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25 <option value="80">80 dpi</option> |
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26 <option value="120">120 dpi</option> |
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27 <option value="200">200 dpi</option> |
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28 </select> |
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29 <select v-model="form.paperSize" class="form-control d-block w-100"> |
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30 <option value="a3"><translate>ISO A3</translate></option> |
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31 <option value="a4"><translate>ISO A4</translate></option> |
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32 </select> |
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33 <!-- |
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34 <small class="d-block my-2"> |
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35 <input |
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36 type="radio" |
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37 id="pdfexport-downloadtype-download" |
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38 value="download" |
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39 v-model="form.downloadType" |
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40 selected |
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42 <label for="pdfexport-downloadtype-download" class="ml-1 mr-2"> |
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43 <translate>Download</translate> |
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44 </label> |
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45 <input |
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46 type="radio" |
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47 id="pdfexport-downloadtype-open" |
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48 value="open" |
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49 v-model="form.downloadType" |
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51 <label for="pdfexport-downloadtype-open" class="ml-1"> |
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52 <translate>Open in new window</translate> |
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53 </label> |
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54 </small> |
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55 --> |
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56 <button |
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57 @click="download" |
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58 type="button" |
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59 v-bind:disabled="!readyToGenerate" |
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60 class="btn btn-sm btn-info d-block w-100" |
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62 <translate>Generate PDF</translate> | |
63 </button> | |
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64 </div> |
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65 </div> |
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66 </div> |
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67 </template> |
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68 |
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69 <script> |
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70 /* This is Free Software under GNU Affero General Public License v >= 3.0 |
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71 * without warranty, see README.md and license for details. |
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72 * |
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73 * SPDX-License-Identifier: AGPL-3.0-or-later |
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74 * License-Filename: LICENSES/AGPL-3.0.txt |
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75 * |
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76 * Copyright (C) 2018, 2019 by via donau |
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77 * – Österreichische Wasserstraßen-Gesellschaft mbH |
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78 * Software engineering by Intevation GmbH |
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79 * |
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80 * Author(s): |
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81 * * Markus Kottländer <markus.kottlaender@intevation.de> |
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82 * * Bernhard E. Reiter <bernhard@intevation.de> |
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83 * * Fadi Abbud <fadi.abbud@intevation.de> |
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84 */ |
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85 import { mapGetters, mapState } from "vuex"; |
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86 import jsPDF from "jspdf"; |
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87 import { getPointResolution } from "ol/proj.js"; |
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88 import locale2 from "locale2"; |
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89 |
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90 var paperSizes = { |
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91 // in millimeter, landscape [width, height] |
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92 a3: [420, 297], |
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93 a4: [297, 210] |
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94 }; |
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95 |
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96 export default { |
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97 name: "pdftool", |
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98 data() { |
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99 return { |
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100 form: { |
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101 format: "landscape", |
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102 paperSize: "a4", |
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103 downloadType: "download", |
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104 resolution: "120" |
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105 }, |
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106 logoImageForPDF: null, // a HTMLImageElement instance |
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107 readyToGenerate: true // if the user is allowed to press the button |
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108 }; |
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109 }, |
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110 computed: { |
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111 ...mapState("application", ["showPdfTool", "logoForPDF"]), |
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112 ...mapState("bottlenecks", ["selectedSurvey"]), |
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113 ...mapState("map", ["openLayersMap", "isolinesLegendImgDataURL"]), |
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114 ...mapGetters("map", ["getLayerByName"]), |
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115 ...mapState("user", ["user"]) |
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116 }, |
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117 methods: { |
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118 download() { |
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119 // disable button while working on it |
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120 this.readyToGenerate = false; |
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121 |
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122 console.log( |
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123 "will generate pdf with", |
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124 this.form.paperSize, |
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125 this.form.format, |
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126 this.form.resolution |
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127 ); |
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128 var width, height; |
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129 |
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130 if (this.form.format !== "portrait") { |
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131 // landscape, default |
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132 width = paperSizes[this.form.paperSize][0]; |
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133 height = paperSizes[this.form.paperSize][1]; |
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134 } else { |
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135 // switch width and height |
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136 width = paperSizes[this.form.paperSize][1]; |
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137 height = paperSizes[this.form.paperSize][0]; |
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138 } |
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139 |
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140 // FUTURE: consider margins |
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141 |
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142 // dots per mm = dots per inch / (25.4 mm/inch) |
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143 var pixelsPerMapMillimeter = this.form.resolution / 25.4; |
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144 var mapSizeForPrint = [ |
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145 // in pixel |
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146 Math.round(width * pixelsPerMapMillimeter), |
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147 Math.round(height * pixelsPerMapMillimeter) |
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148 ]; |
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149 |
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150 // generate PDF and open it |
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151 // our units are milimeters; width 0 x height 0 is left upper corner |
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152 |
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153 // Step 1 prepare and save current map extend |
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154 // Then add callback "rendercomplete" for Step 3 |
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155 // which will generate the pdf and resets the map view |
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156 // Step 2 which starts rendering a map with the necessary image size |
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157 |
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158 var map = this.openLayersMap; |
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159 var mapSize = map.getSize(); // size in pixels of the map in the DOM |
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160 // Calculate the extent for the current view state and the passed size. |
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161 // The size is the pixel dimensions of the box into which the calculated |
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162 // extent should fit. |
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163 var mapExtent = map.getView().calculateExtent(mapSize); |
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164 |
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165 var pdf = new jsPDF(this.form.format, "mm", this.form.paperSize); |
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166 var northarrowSize = 3; |
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167 var self = this; |
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168 |
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169 // set a callback for after the next complete rendering of the map |
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170 map.once("rendercomplete", function(event) { |
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171 let canvas = event.context.canvas; |
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172 |
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173 // because we are using Web Mercator, a pixel represents |
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174 // a differently sizes spot depending on the place of the map. |
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175 // So we use a value calculated from the center of the current view. |
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176 let view = map.getView(); |
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177 let proj = view.getProjection(); |
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178 let metersPerPixel = // average meters (reality) per pixel (map) |
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179 getPointResolution(proj, view.getResolution(), view.getCenter()) * |
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180 proj.getMetersPerUnit(); |
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181 // DEBUG console.log("metersPerPixel = ", metersPerPixel); |
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182 |
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183 let scaleNominator = Math.round( |
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184 // the x in 1:x map scale |
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185 1000 * pixelsPerMapMillimeter * metersPerPixel |
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186 ); |
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187 console.log("scaleNominator = ", scaleNominator); |
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188 |
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189 var data = canvas.toDataURL("image/jpeg"); |
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190 pdf.addImage(data, "JPEG", 0, 0, width, height); |
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191 self.addScaleBar(pdf, width, height, scaleNominator); |
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192 self.addNorthArrow(pdf, 15, 9, northarrowSize); |
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193 self.addPageInfo(pdf); |
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194 self.addAboutBox(pdf, width, height); |
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195 |
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196 if (self.getLayerByName("Bottleneck isolines").isVisible) { |
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197 self.addLegend(pdf, width, height); |
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198 } |
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199 |
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200 pdf.save("map.pdf"); |
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201 // reset to original size |
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202 map.setSize(mapSize); |
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203 map.getView().fit(mapExtent, { size: mapSize }); |
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204 |
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205 // as we are done: re-enable button |
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206 self.readyToGenerate = true; |
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207 }); |
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208 |
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209 // trigger rendering |
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210 this.prepareRendering(function() { |
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211 map.setSize(mapSizeForPrint); |
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212 map.getView().fit(mapExtent, { size: mapSizeForPrint }); |
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213 |
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214 /* |
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215 let a = document.createElement("a"); |
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216 a.href = src; // need the generated PDF in here (as dataURL?) |
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217 |
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218 if (this.form.downloadType === "download") |
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219 a.download = src.substr(src.lastIndexOf("/") + 1); |
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220 else a.target = "_blank"; |
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221 |
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222 document.body.appendChild(a); |
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223 a.click(); |
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224 document.body.removeChild(a); |
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225 */ |
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226 }); |
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227 }, |
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228 prepareRendering(callback) { |
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229 // call callback() once the preparations are done |
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230 this.logoImageForPDF = new Image(); |
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231 |
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232 this.logoImageForPDF.onload = function() { |
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233 callback(); |
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234 }; |
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235 |
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236 if (this.logoForPDF) { |
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237 this.logoImageForPDF.src = this.logoForPDF; |
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238 } else { |
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239 this.logoImageForPDF.src = "/img/gemma-logo-for-pdf.png"; |
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240 } |
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241 }, |
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242 addRoundedBox(doc, x, y, w, h) { |
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243 // draws a rounded background box at (x,y) width x height |
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244 // using jsPDF units |
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245 doc.setDrawColor(255, 255, 255); |
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246 doc.setFillColor(255, 255, 255); |
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247 doc.roundedRect(x, y, w, h, 3, 3, "FD"); |
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248 }, |
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249 addScaleBar(doc, docWidth, docHeight, scaleNominator) { |
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250 // scaleNominator is the x in 1:x of the map scale |
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251 |
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252 // hardcode maximal width for now and place in lower right corner |
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253 let maxWidth = 80; // in mm |
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254 |
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255 // reduce width until we'll find a nice number for printing |
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256 // strategy: |
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257 // 1. check which unit prefix we shall use to get [10:10000[ |
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258 // 2. using a mapping for the leading digit to get [1:10[ |
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259 // 3. select a smaller number which is nicely dividable |
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260 // 4. scale up again to get length in paper mm and to be shown |
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261 |
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262 // from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/log10#Polyfill |
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263 let log10 = |
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264 Math.log10 || // more precise, but unsupported by IE |
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265 function(x) { |
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266 return Math.log(x) * Math.LOG10E; |
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267 }; |
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268 |
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269 let maxLength = maxWidth * scaleNominator; |
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270 |
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271 let unit = "mm"; |
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272 let unitConversionFactor = 1; |
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273 if (maxLength >= 1e7) { |
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274 // >= 10 km |
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275 unit = "km"; |
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276 unitConversionFactor = 1e6; |
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277 } else if (maxLength >= 1e4) { |
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278 // >= 10 m |
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279 unit = "m"; |
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280 unitConversionFactor = 1e3; |
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281 } |
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282 |
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283 maxLength /= unitConversionFactor; |
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284 |
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285 // DEBUG console.log(maxLength, unit); |
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286 let unroundedLength = maxLength; |
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287 let numberOfDigits = Math.floor(log10(unroundedLength)); |
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288 let factor = Math.pow(10, numberOfDigits); |
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289 let mapped = unroundedLength / factor; |
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290 // DEBUG console.log(mapped); |
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291 |
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292 var length = Math.floor(maxLength); // just to have an upper limit |
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293 |
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294 // manually only use numbers that are very nice to devide by 4 |
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295 // note that this is taken into account for rounding later |
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296 if (mapped > 8) { |
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297 length = 8 * factor; |
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298 } else if (mapped > 4) { |
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299 length = 4 * factor; |
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300 } else if (mapped > 2) { |
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301 length = 2 * factor; |
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302 } else { |
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303 length = factor; |
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304 } |
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305 |
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306 let size = (length * unitConversionFactor) / scaleNominator / 4; |
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307 |
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308 let x = docWidth - (size * 4 + 8); |
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309 let y = docHeight - 6; |
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310 |
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311 this.addRoundedBox(doc, x - 4, y - 4, size * 4 + 12, 10); |
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312 |
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313 doc.setDrawColor(0, 0, 0); |
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314 doc.setFillColor(0, 0, 0); |
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315 doc.rect(x, y, size, 1, "FD"); |
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316 doc.setFillColor(255, 255, 255); |
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317 doc.setDrawColor(0, 0, 0); |
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318 doc.rect(x + size, y, size, 1, "FD"); |
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319 doc.setFillColor(0, 0, 0); |
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320 doc.setDrawColor(0, 0, 0); |
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321 doc.rect(x + size * 2, y, size * 2, 1, "FD"); |
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322 doc.setFontSize(5); |
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323 doc.text(x, y + 3, "0"); |
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324 // /4 and could give 2.5. We still round, because of floating point arith |
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325 doc.text( |
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326 x + size, |
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327 y + 3, |
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328 (Math.round((length * 10) / 4) / 10).toString() |
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329 ); |
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330 doc.text(x + size * 2, y + 3, Math.round(length / 2).toString()); |
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331 doc.text(x + size * 4, y + 3, Math.round(length).toString() + " " + unit); |
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332 }, |
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333 |
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334 addNorthArrow(doc, x1, y1, size) { |
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335 var y2 = y1 + size * 3; |
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336 var x3 = x1 - size * 2; |
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337 var y3 = y1 + size * 5; |
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338 var x4 = x1 + size * 2; |
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339 //white triangle |
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340 doc.setFillColor(255, 255, 255); |
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341 doc.setDrawColor(255, 255, 255); |
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342 doc.triangle(x3 - 0.8, y3 + 1.2, x1, y1 - 1.2, x1, y2 + 0.6, "F"); |
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343 doc.triangle(x1, y1 - 1.2, x1, y2 + 0.6, x4 + 0.8, y3 + 1.2, "F"); |
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344 //north arrow |
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345 doc.setDrawColor(0, 0, 0); |
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346 doc.setFillColor(255, 255, 255); |
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347 doc.triangle(x3, y3, x1, y1, x1, y2, "FD"); |
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348 doc.setFillColor(0, 0, 0); |
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349 doc.triangle(x1, y1, x1, y2, x4, y3, "FD"); |
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350 doc.setFontSize(size * 3.1); |
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351 doc.setTextColor(255, 255, 255); |
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352 doc.setFontStyle("bold"); |
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353 doc.text(size < 3 ? x1 - 0.5 : x1 - 1.3, y3 + 1, "N"); |
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354 doc.setFontSize(size * 3); |
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355 doc.setTextColor(0, 0, 0); |
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356 doc.setFontStyle("normal"); |
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357 doc.text(size < 3 ? x1 - 0.5 : x1 - 1.3, y3 + 1, "N"); |
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358 }, |
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359 // add some text at specific coordinates and determine how many wrolds in single line |
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360 addText(doc, postitionX, positionY, size, color, lineWidth, text) { |
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361 // split the incoming string to an array, each element is a string of words in a single line |
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362 var textLines = doc.splitTextToSize(text, lineWidth); |
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363 // get the longest line to fit the white backround to it |
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364 var longestString = ""; |
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365 textLines.forEach(function(element) { |
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366 if (element.length > longestString.length) longestString = element; |
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367 }); |
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368 var indexOfMaxString = textLines.indexOf(longestString); |
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369 // white background (rectangular) around the text |
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370 doc.setFillColor(255, 255, 255); |
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371 doc.setDrawColor(255, 255, 255); |
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372 doc.rect( |
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373 postitionX - doc.getStringUnitWidth(textLines[indexOfMaxString]) / size, |
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374 size > 10 ? positionY - size / 1.8 : positionY - size / 2.4, |
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375 doc.getStringUnitWidth(textLines[indexOfMaxString]) * (size / 2.6), |
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376 textLines.length * (size / 2), |
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377 "FD" |
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378 ); |
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379 //rounded rectangular |
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380 /* doc.roundedRect( |
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381 postitionX - doc.getStringUnitWidth(textLines[indexOfMaxString]) / size, |
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382 size > 10 ? positionY - size / 1.8 : positionY - size / 2.6, |
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383 doc.getStringUnitWidth(textLines[indexOfMaxString]) * (size / 2.6), |
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384 textLines.length * (size / 2), |
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385 3, |
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386 3, |
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387 "FD" |
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388 ); */ |
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389 doc.setTextColor(color); |
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390 doc.setFontSize(size); |
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391 doc.text(postitionX, positionY, textLines); |
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392 }, |
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393 addPageInfo(doc) { |
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394 this.addRoundedBox(doc, 0, 0, 110, 8); |
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395 let str = |
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396 this.$gettext("Date of publication:") + |
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397 " " + |
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398 new Date().toLocaleString(locale2) + |
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399 " " + |
1962
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400 this.$gettext("– generated by:") + |
1903
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401 " " + |
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402 this.user; |
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403 this.addText(doc, 5, 5, 9, "black", 100, str); |
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404 }, |
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405 addAboutBox(doc, docWidth, docHeight) { |
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406 let top = docHeight - 20; |
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407 this.addRoundedBox(doc, 0, top, 120, 20); |
1947
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408 |
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409 let logoImage = this.logoImageForPDF; |
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410 let aspectRatio = logoImage.width / logoImage.height; |
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411 doc.addImage(logoImage, "PNG", 5, docHeight - 19, 110, 110 / aspectRatio); |
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412 |
1903
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413 let str = |
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414 "Dislaimer: Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua."; |
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415 this.addText(doc, 5, docHeight - 6, 8, "black", 115, str); |
1931
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client: pdf-gen: improve legend behaviour
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1928
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416 }, |
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417 addLegend(doc, docWidth) { |
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418 // transforming into an HTMLImageElement only to find out |
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419 // the width x height of the legend image |
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420 // FUTURE: find a better way to get the width and height |
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421 let legendImage = new Image(); |
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422 legendImage.src = this.isolinesLegendImgDataURL; |
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423 let aspectRatio = legendImage.width / legendImage.height; |
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424 |
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425 this.addRoundedBox(doc, docWidth - 54, 0, 54, 50 / aspectRatio + 4); |
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426 doc.addImage(legendImage, docWidth - 52, 2, 50, 50 / aspectRatio); |
1272
bc55ffaeb639
cleaned up client/src directory
Markus Kottlaender <markus@intevation.de>
parents:
diff
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427 } |
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Markus Kottlaender <markus@intevation.de>
parents:
diff
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428 } |
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Markus Kottlaender <markus@intevation.de>
parents:
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429 }; |
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430 </script> |