Mercurial > gemma
annotate client/src/components/gauge/Waterlevel.vue @ 2816:c02cebff3f16
client: SPUC7/8: fix tooltip size and positioning
The size is now dynamically calculated based on the content and the tooltip is now
guaranteed to be visible instead of reaching out of the viewport.
author | Markus Kottlaender <markus@intevation.de> |
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date | Tue, 26 Mar 2019 19:37:55 +0100 |
parents | 97cf32cf2562 |
children | 53c2bd009c68 |
rev | line source |
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1 <template> |
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2 <div |
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3 class="d-flex flex-fill justify-content-center align-items-center diagram-container" |
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4 > |
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5 <div v-if="!waterlevels.length"> |
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6 <translate>No data available.</translate> |
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7 </div> |
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8 </div> |
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9 </template> |
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10 |
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11 <style lang="sass" scoped> |
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12 .diagram-container |
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13 /deep/ |
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14 .line |
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15 clip-path: url(#clip) |
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16 path |
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17 stroke: steelblue |
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18 stroke-width: 2 |
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19 fill: none |
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20 &.d3-line-chunked-chunk-gap |
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21 stroke-opacity: 0 |
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22 circle |
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23 stroke-width: 0 |
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24 fill: steelblue |
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25 &.d3-line-chunked-chunk-predicted-point |
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26 fill-opacity: 0.6 |
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27 |
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28 .hdc-line, |
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29 .ldc-line, |
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30 .mw-line |
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31 stroke-width: 1 |
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32 fill: none |
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33 clip-path: url(#clip) |
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34 .hdc-line |
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35 stroke: red |
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36 .ldc-line |
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37 stroke: green |
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38 .mw-line |
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39 stroke: grey |
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40 .ref-waterlevel-label |
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41 font-size: 11px |
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42 fill: #999 |
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43 .hdc-ldc-area |
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44 fill: rgba(0, 255, 0, 0.1) |
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45 .now-line |
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46 stroke: #999 |
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47 stroke-width: 1 |
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48 stroke-dasharray: 5, 5 |
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49 clip-path: url(#clip) |
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50 .now-line-label |
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51 font-size: 11px |
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52 fill: #999 |
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53 .prediction-area |
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54 fill: steelblue |
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55 fill-opacity: 0.2 |
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56 clip-path: url(#clip) |
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57 |
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58 path.nash-sutcliffe |
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59 fill: none |
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60 stroke: black |
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61 stroke-width: 1 |
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62 clip-path: url(#clip) |
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63 &.ns72 |
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64 fill: rgba(0, 0, 0, 0.05) |
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65 text.nash-sutcliffe |
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66 font-size: 10px |
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67 clip-path: url(#clip) |
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68 tspan:last-child |
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69 font-size: 9px |
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70 fill: #777 |
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71 |
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72 .tick |
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73 line |
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74 stroke-dasharray: 5 |
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75 stroke: #ccc |
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76 |
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77 .zoom |
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78 cursor: move |
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79 fill: none |
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80 pointer-events: all |
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81 .brush |
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82 .selection |
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83 stroke: none |
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84 fill-opacity: 0.2 |
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85 .handle |
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86 stroke: rgba($color-info, 0.5) |
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87 fill: rgba($color-info, 0.5) |
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88 |
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89 .chart-dots |
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90 clip-path: url(#clip) |
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91 .chart-dot |
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92 fill: steelblue |
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93 stroke: steelblue |
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94 pointer-events: none |
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95 opacity: 0 |
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96 transition: opacity 0.1s |
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97 .chart-tooltip |
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98 opacity: 0 |
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99 transition: opacity 0.3s |
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100 rect |
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101 fill: #fff |
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102 stroke: #ccc |
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103 text |
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104 fill: #666 |
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105 font-size: 12px |
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106 tspan:last-child |
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107 font-weight: bold |
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108 </style> |
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109 |
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110 <script> |
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111 /* This is Free Software under GNU Affero General Public License v >= 3.0 |
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112 * without warranty, see README.md and license for details. |
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113 * |
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114 * SPDX-License-Identifier: AGPL-3.0-or-later |
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115 * License-Filename: LICENSES/AGPL-3.0.txt |
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116 * |
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117 * Copyright (C) 2018 by via donau |
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118 * – Österreichische Wasserstraßen-Gesellschaft mbH |
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119 * Software engineering by Intevation GmbH |
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120 * |
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121 * Author(s): |
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122 * Markus Kottländer <markus.kottlaender@intevation.de> |
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123 */ |
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124 |
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125 import { mapState, mapGetters } from "vuex"; |
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126 import * as d3Base from "d3"; |
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127 import { lineChunked } from "d3-line-chunked"; |
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128 import { startOfDay, endOfDay } from "date-fns"; |
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129 import debounce from "debounce"; |
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130 |
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131 // we should load only d3 modules we need but for now we'll go with the lazy way |
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132 // https://www.giacomodebidda.com/how-to-import-d3-plugins-with-webpack/ |
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133 // d3-line-chunked plugin: https://github.com/pbeshai/d3-line-chunked |
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134 const d3 = Object.assign(d3Base, { lineChunked }); |
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135 |
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136 export default { |
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137 data() { |
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138 return { |
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139 svg: null, |
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140 diagram: null, |
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141 navigation: null, |
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142 dimensions: null, |
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143 extent: null, |
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144 scale: null, |
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145 axes: null |
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146 }; |
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147 }, |
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148 computed: { |
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149 ...mapState("gauges", [ |
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150 "dateFrom", |
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151 "dateTo", |
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152 "waterlevels", |
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153 "nashSutcliffe" |
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154 ]), |
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155 ...mapGetters("gauges", ["selectedGauge"]) |
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156 }, |
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157 methods: { |
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158 drawDiagram() { |
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159 // remove old diagram and exit if necessary data is missing |
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160 d3.select(".diagram-container svg").remove(); |
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161 if (!this.selectedGauge || !this.waterlevels.length) return; |
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162 |
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163 // PREPARE HELPERS |
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164 |
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165 // HDC/LDC/MW for the selected gauge |
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166 const refWaterLevels = JSON.parse( |
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167 this.selectedGauge.properties.reference_water_levels |
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168 ); |
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169 |
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170 // dimensions (widths, heights, margins) |
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171 this.dimensions = this.getDimensions(); |
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172 |
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173 // get min/max values for date and waterlevel axis |
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174 this.extent = this.getExtent(refWaterLevels); |
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175 |
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176 // scaling helpers |
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177 this.scale = this.getScale(); |
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178 |
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179 // creating the axes based on the scales |
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180 this.axes = { |
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181 x: d3 |
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182 .axisTop(this.scale.x) |
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183 .tickSizeInner(this.dimensions.mainHeight) |
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184 .tickSizeOuter(0), |
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185 y: d3 |
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186 .axisRight(this.scale.y) |
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187 .tickSizeInner(this.dimensions.width) |
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188 .tickSizeOuter(0), |
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189 x2: d3.axisBottom(this.scale.x2) |
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190 }; |
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191 |
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192 // DRAW DIAGRAM/NAVIGATION AREAS |
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193 |
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194 // create svg |
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195 this.svg = d3 |
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196 .select(".diagram-container") |
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197 .append("svg") |
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198 .attr("width", "100%") |
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199 .attr("height", "100%"); |
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200 |
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201 // create container for main diagram |
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202 this.diagram = this.svg |
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203 .append("g") |
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204 .attr("class", "main") |
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205 .attr( |
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206 "transform", |
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207 `translate(${this.dimensions.mainMargin.left}, ${ |
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208 this.dimensions.mainMargin.top |
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209 })` |
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210 ); |
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211 |
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212 // create container for navigation diagram |
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213 this.navigation = this.svg |
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214 .append("g") |
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215 .attr("class", "nav") |
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216 .attr( |
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217 "transform", |
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218 `translate(${this.dimensions.navMargin.left}, ${ |
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219 this.dimensions.navMargin.top |
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220 })` |
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221 ); |
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222 |
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223 // define visible area, everything outside this area will be hidden |
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224 this.svg |
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225 .append("defs") |
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226 .append("clipPath") |
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227 .attr("id", "clip") |
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228 .append("rect") |
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229 .attr("width", this.dimensions.width) |
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230 .attr("height", this.dimensions.mainHeight); |
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231 |
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232 // DRAW DIAGRAM PARTS |
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233 |
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234 // Each drawSomething function (with the exception of drawRefLines) |
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235 // returns a fuction to update the respective chart/area/etc. These |
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236 // updater functions are used by the zoom feature to rescale all elements. |
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237 const updaters = []; |
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238 |
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239 // draw |
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240 this.drawRefLines(refWaterLevels); // static, doesn't need an updater |
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241 updaters.push(this.drawAxes()); |
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242 updaters.push(this.drawWaterlevelCharts()); |
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243 updaters.push(this.drawNowLines()); |
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244 updaters.push(this.drawPredictionAreas()); |
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245 updaters.push(this.drawNashSutcliffe(24)); |
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246 updaters.push(this.drawNashSutcliffe(48)); |
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247 updaters.push(this.drawNashSutcliffe(72)); |
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248 |
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249 // INTERACTIONS |
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250 |
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251 // create rectanlge on the main chart area to capture mouse events |
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252 const eventRect = this.svg |
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253 .append("rect") |
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254 .attr("class", "zoom") |
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255 .attr("width", this.dimensions.width) |
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256 .attr("height", this.dimensions.mainHeight) |
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257 .attr( |
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258 "transform", |
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259 `translate(${this.dimensions.mainMargin.left}, ${ |
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260 this.dimensions.mainMargin.top |
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261 })` |
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262 ); |
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263 |
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264 this.createZoom(updaters, eventRect); |
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265 this.createTooltips(eventRect); |
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266 }, |
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267 getDimensions() { |
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268 // dimensions and margins |
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269 const svgWidth = document.querySelector(".diagram-container").clientWidth; |
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270 const svgHeight = document.querySelector(".diagram-container") |
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271 .clientHeight; |
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272 const mainMargin = { top: 20, right: 20, bottom: 110, left: 80 }; |
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273 const navMargin = { |
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274 top: svgHeight - mainMargin.top - 65, |
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275 right: 20, |
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276 bottom: 30, |
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277 left: 80 |
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278 }; |
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279 const width = +svgWidth - mainMargin.left - mainMargin.right; |
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280 const mainHeight = +svgHeight - mainMargin.top - mainMargin.bottom; |
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281 const navHeight = +svgHeight - navMargin.top - navMargin.bottom; |
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282 |
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283 return { width, mainHeight, navHeight, mainMargin, navMargin }; |
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284 }, |
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285 getExtent(refWaterLevels) { |
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286 return { |
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287 // set min/max values for the date axis |
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288 date: [startOfDay(this.dateFrom), endOfDay(this.dateTo)], |
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289 // set min/max values for the waterlevel axis |
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290 // including HDC (+ 1/8 HDC-LDC) and LDC (- 1/4 HDC-LDC) |
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291 waterlevel: d3.extent( |
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292 [ |
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293 ...this.waterlevels, |
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294 { |
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295 waterlevel: |
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296 refWaterLevels.HDC + |
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297 (refWaterLevels.HDC - refWaterLevels.LDC) / 8 |
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298 }, |
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299 { |
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300 waterlevel: Math.max( |
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301 refWaterLevels.LDC - |
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302 (refWaterLevels.HDC - refWaterLevels.LDC) / 4, |
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303 0 |
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304 ) |
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305 } |
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306 ], |
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307 d => d.waterlevel |
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308 ) |
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309 }; |
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310 }, |
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311 getScale() { |
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312 // scaling helpers to convert real world values into pixels |
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313 const x = d3.scaleTime().range([0, this.dimensions.width]); |
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314 const y = d3.scaleLinear().range([this.dimensions.mainHeight, 0]); |
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315 const x2 = d3.scaleTime().range([0, this.dimensions.width]); |
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316 const y2 = d3.scaleLinear().range([this.dimensions.navHeight, 0]); |
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317 |
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318 // setting the min and max values for the diagram axes |
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319 x.domain(d3.extent(this.extent.date)); |
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320 y.domain(this.extent.waterlevel); |
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321 x2.domain(x.domain()); |
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322 y2.domain(y.domain()); |
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323 |
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324 return { x, y, x2, y2 }; |
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325 }, |
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326 drawAxes() { |
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327 this.diagram |
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328 .append("g") |
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329 .attr("class", "axis--x") |
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330 .attr("transform", `translate(0, ${this.dimensions.mainHeight})`) |
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331 .call(this.axes.x) |
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332 .selectAll(".tick text") |
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333 .attr("y", 15); |
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334 this.diagram // label |
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335 .append("text") |
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336 .text(this.$gettext("Waterlevel [cm]")) |
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337 .attr("text-anchor", "middle") |
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338 .attr( |
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339 "transform", |
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340 `translate(-45, ${this.dimensions.mainHeight / 2}) rotate(-90)` |
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341 ); |
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342 this.diagram |
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343 .append("g") |
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344 .call(this.axes.y) |
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345 .selectAll(".tick text") |
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346 .attr("x", -25); |
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347 |
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348 this.navigation |
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349 .append("g") |
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350 .attr("class", "axis axis--x") |
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351 .attr("transform", `translate(0, ${this.dimensions.navHeight})`) |
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352 .call(this.axes.x2); |
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353 |
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354 return () => { |
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355 this.diagram |
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356 .select(".axis--x") |
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357 .call(this.axes.x) |
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358 .selectAll(".tick text") |
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359 .attr("y", 15); |
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360 }; |
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361 }, |
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362 drawWaterlevelCharts() { |
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363 const waterlevelChartDrawer = isNav => { |
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364 return d3 |
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365 .lineChunked() |
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366 .x(d => this.scale[isNav ? "x2" : "x"](d.date)) |
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367 .y(d => this.scale[isNav ? "y2" : "y"](d.waterlevel)) |
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368 .curve(d3.curveLinear) |
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369 .isNext(this.isNext(900)) |
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370 .pointAttrs({ r: isNav ? 1.7 : 2.2 }) |
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371 .chunk(d => (d.predicted ? "predicted" : "line")) |
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372 .chunkDefinitions({ predicted: {} }); |
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373 }; |
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374 |
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375 this.diagram |
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376 .append("g") |
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377 .attr("class", "line") |
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378 .datum(this.waterlevels) |
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379 .call(waterlevelChartDrawer()); |
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380 |
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381 this.navigation |
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382 .append("g") |
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383 .attr("class", "line") |
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384 .datum(this.waterlevels) |
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385 .call(waterlevelChartDrawer(true)); |
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386 |
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387 return () => { |
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388 this.diagram.select(".line").call(waterlevelChartDrawer()); |
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389 }; |
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390 }, |
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391 drawNowLines() { |
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392 const nowLine = d3 |
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393 .line() |
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394 .x(d => this.scale.x(d.x)) |
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395 .y(d => this.scale.y(d.y)); |
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396 |
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397 const nowLabel = selection => { |
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398 selection.attr( |
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399 "transform", |
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400 `translate(${this.scale.x(new Date())}, ${this.scale.y( |
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401 this.extent.waterlevel[1] - 16 |
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402 )})` |
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403 ); |
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404 }; |
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405 |
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406 // draw in main |
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407 this.diagram |
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408 .append("path") |
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409 .datum([ |
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410 { x: new Date(), y: this.extent.waterlevel[0] }, |
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411 { x: new Date(), y: this.extent.waterlevel[1] - 20 } |
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412 ]) |
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413 .attr("class", "now-line") |
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414 .attr("d", nowLine); |
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415 this.diagram // label |
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416 .append("text") |
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417 .text(this.$gettext("Now")) |
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418 .attr("class", "now-line-label") |
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419 .attr("text-anchor", "middle") |
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420 .call(nowLabel); |
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421 |
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422 // draw in nav |
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423 this.navigation |
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424 .append("path") |
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425 .datum([ |
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426 { x: new Date(), y: this.extent.waterlevel[0] }, |
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427 { x: new Date(), y: this.extent.waterlevel[1] - 20 } |
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428 ]) |
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429 .attr("class", "now-line") |
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430 .attr( |
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431 "d", |
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432 d3 |
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433 .line() |
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434 .x(d => this.scale.x2(d.x)) |
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435 .y(d => this.scale.y2(d.y)) |
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436 ); |
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437 |
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438 return () => { |
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439 this.diagram.select(".now-line").attr("d", nowLine); |
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440 this.diagram.select(".now-line-label").call(nowLabel); |
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441 }; |
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442 }, |
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443 drawPredictionAreas() { |
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444 const predictionArea = isNav => |
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445 d3 |
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446 .area() |
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447 .defined(d => d.predicted && d.min && d.max) |
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448 .x(d => this.scale[isNav ? "x2" : "x"](d.date)) |
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449 .y0(d => this.scale[isNav ? "y2" : "y"](d.min)) |
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450 .y1(d => this.scale[isNav ? "y2" : "y"](d.max)); |
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451 |
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452 this.diagram |
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453 .append("path") |
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454 .datum(this.waterlevels) |
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455 .attr("class", "prediction-area") |
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456 .attr("d", predictionArea()); |
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457 |
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458 this.navigation |
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459 .append("path") |
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460 .datum(this.waterlevels) |
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461 .attr("class", "prediction-area") |
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462 .attr("d", predictionArea(true)); |
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463 |
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464 return () => { |
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465 this.diagram.select(".prediction-area").attr("d", predictionArea()); |
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466 }; |
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467 }, |
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468 drawRefLines(refWaterLevels) { |
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469 // filling area between HDC and LDC |
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470 this.diagram |
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471 .append("rect") |
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472 .attr("class", "hdc-ldc-area") |
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473 .attr("x", 0) |
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474 .attr("y", this.scale.y(refWaterLevels.HDC)) |
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475 .attr("width", this.dimensions.width) |
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476 .attr( |
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477 "height", |
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478 this.scale.y(refWaterLevels.LDC) - this.scale.y(refWaterLevels.HDC) |
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479 ); |
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480 |
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481 const refWaterlevelLine = d3 |
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482 .line() |
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483 .x(d => this.scale.x(d.x)) |
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484 .y(d => this.scale.y(d.y)); |
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485 |
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486 // HDC |
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487 this.diagram |
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488 .append("path") |
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489 .datum([ |
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490 { x: 0, y: refWaterLevels.HDC }, |
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491 { x: this.extent.date[1], y: refWaterLevels.HDC } |
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492 ]) |
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493 .attr("class", "hdc-line") |
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494 .attr("d", refWaterlevelLine); |
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495 this.diagram // label |
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496 .append("text") |
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497 .text(`HDC (${refWaterLevels.HDC})`) |
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498 .attr("class", "ref-waterlevel-label") |
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499 .attr("x", 5) |
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500 .attr("y", this.scale.y(refWaterLevels.HDC) - 3); |
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501 // LDC |
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502 this.diagram |
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503 .append("path") |
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504 .datum([ |
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505 { x: 0, y: refWaterLevels.LDC }, |
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506 { x: this.extent.date[1], y: refWaterLevels.LDC } |
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507 ]) |
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508 .attr("class", "ldc-line") |
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509 .attr("d", refWaterlevelLine); |
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510 this.diagram // label |
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511 .append("text") |
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512 .text(`LDC (${refWaterLevels.LDC})`) |
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513 .attr("class", "ref-waterlevel-label") |
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514 .attr("x", 5) |
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515 .attr("y", this.scale.y(refWaterLevels.LDC) - 3); |
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516 // MW |
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517 this.diagram |
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518 .append("path") |
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519 .datum([ |
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520 { x: 0, y: refWaterLevels.MW }, |
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521 { x: this.extent.date[1], y: refWaterLevels.MW } |
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522 ]) |
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523 .attr("class", "mw-line") |
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524 .attr("d", refWaterlevelLine); |
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525 this.diagram // label |
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526 .append("text") |
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527 .text(`MW (${refWaterLevels.MW})`) |
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528 .attr("class", "ref-waterlevel-label") |
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529 .attr("x", 5) |
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530 .attr("y", this.scale.y(refWaterLevels.MW) - 3); |
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531 }, |
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532 drawNashSutcliffe(hours) { |
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533 const coeff = this.nashSutcliffe.coeffs.find(c => c.hours === hours); |
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534 const dateNow = new Date(this.nashSutcliffe.when); |
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535 const dateStart = new Date(dateNow.getTime() - hours * 60 * 60 * 1000); |
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536 |
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537 const nashSutcliffeBox = hours => { |
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538 return d3 |
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539 .area() |
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540 .x(d => this.scale.x(d)) |
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541 .y0(() => this.dimensions.mainHeight + 0.5) |
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542 .y1(() => this.dimensions.mainHeight - 15 * (hours / 24)); |
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543 }; |
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|
544 |
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545 const nashSutcliffeLabel = (label, date, hours) => { |
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546 let days = hours / 24; |
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547 label |
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548 .attr("x", this.scale.x(date) + 3) |
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|
549 .attr("y", this.dimensions.mainHeight - (15 * days + 0.5) + 12); |
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550 }; |
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Markus Kottlaender <markus@intevation.de>
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|
551 |
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552 // Show nash-sutcliffe only when x-axis extent is smaller than 35 days |
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553 // (3024000000 ms). Since it shows squares representing 1, 2 and 3 days |
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554 // it does not make sense to show them on a x-axis with hundres of days. |
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|
555 if ( |
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Markus Kottlaender <markus@intevation.de>
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|
556 coeff.samples && |
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557 this.scale.x.domain()[1] - this.scale.x.domain()[0] < 3024000000 |
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558 ) { |
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|
559 this.diagram |
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|
560 .append("path") |
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parents:
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|
561 .datum([dateStart, dateNow]) |
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Markus Kottlaender <markus@intevation.de>
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562 .attr("class", "nash-sutcliffe ns" + hours) |
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Markus Kottlaender <markus@intevation.de>
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|
563 .attr("d", nashSutcliffeBox(hours)); |
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|
564 this.diagram |
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parents:
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|
565 .append("text") |
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parents:
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|
566 .attr("class", "nash-sutcliffe ns" + hours) |
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567 .call(nashSutcliffeLabel, dateStart, hours) |
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parents:
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diff
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|
568 .append("tspan") |
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parents:
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|
569 .text(coeff.value.toFixed(2)) |
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client: waterlevel diagram: optimized code for better readability
Markus Kottlaender <markus@intevation.de>
parents:
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570 .select(function() { |
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Markus Kottlaender <markus@intevation.de>
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571 return this.parentNode; |
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Markus Kottlaender <markus@intevation.de>
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|
572 }) |
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changeset
|
573 .append("tspan") |
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|
574 .text(` (${coeff.samples})`) |
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parents:
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|
575 .attr("dy", -1); |
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Markus Kottlaender <markus@intevation.de>
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changeset
|
576 |
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577 return () => { |
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578 this.diagram |
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579 .select("path.nash-sutcliffe.ns" + hours) |
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580 .attr("d", nashSutcliffeBox(hours)); |
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581 this.diagram |
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582 .select("text.nash-sutcliffe.ns" + hours) |
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583 .call(nashSutcliffeLabel, dateStart, hours); |
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584 }; |
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585 } |
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586 }, |
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587 createZoom(updaters, eventRect) { |
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588 const brush = d3 |
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589 .brushX() |
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590 .handleSize(4) |
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591 .extent([[0, 0], [this.dimensions.width, this.dimensions.navHeight]]); |
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592 |
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593 const zoom = d3 |
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594 .zoom() |
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595 .scaleExtent([1, Infinity]) |
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596 .translateExtent([ |
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597 [0, 0], |
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598 [this.dimensions.width, this.dimensions.mainHeight] |
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599 ]) |
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600 .extent([[0, 0], [this.dimensions.width, this.dimensions.mainHeight]]); |
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601 |
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602 brush.on("brush end", () => { |
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603 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") |
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604 return; // ignore brush-by-zoom |
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605 let s = d3.event.selection || this.scale.x2.range(); |
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606 this.scale.x.domain(s.map(this.scale.x2.invert, this.scale.x2)); |
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607 updaters.forEach(u => u && u()); |
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608 this.svg |
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609 .select(".zoom") |
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610 .call( |
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611 zoom.transform, |
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612 d3.zoomIdentity |
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613 .scale(this.dimensions.width / (s[1] - s[0])) |
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614 .translate(-s[0], 0) |
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615 ); |
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616 }); |
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617 |
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618 zoom.on("zoom", () => { |
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619 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") |
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620 return; // ignore zoom-by-brush |
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621 let t = d3.event.transform; |
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622 this.scale.x.domain(t.rescaleX(this.scale.x2).domain()); |
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623 updaters.forEach(u => u && u()); |
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624 this.navigation |
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625 .select(".brush") |
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626 .call(brush.move, this.scale.x.range().map(t.invertX, t)); |
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627 }); |
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628 zoom.on("start", () => { |
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629 this.svg.select(".chart-dot").style("opacity", 0); |
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630 this.svg.select(".chart-tooltip").style("opacity", 0); |
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631 }); |
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632 |
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|
633 this.navigation |
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634 .append("g") |
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635 .attr("class", "brush") |
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|
636 .call(brush) |
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637 .call(brush.move, this.scale.x.range()); |
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638 |
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639 eventRect.call(zoom); |
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640 }, |
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|
641 createTooltips(eventRect) { |
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642 // create clippable container for the dot |
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643 this.diagram |
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|
644 .append("g") |
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|
645 .attr("class", "chart-dots") |
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646 .append("circle") |
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647 .attr("class", "chart-dot") |
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|
648 .attr("r", 4); |
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|
649 |
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650 // create container for the tooltip |
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651 const tooltip = this.diagram.append("g").attr("class", "chart-tooltip"); |
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652 tooltip.append("rect"); |
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|
653 |
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654 const padding = 5; |
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|
655 |
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656 // create container for multiple text rows |
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657 const tooltipText = tooltip.append("text").attr("text-anchor", "middle"); |
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658 tooltipText.append("tspan").attr("alignment-baseline", "hanging"); |
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659 tooltipText |
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660 .append("tspan") |
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661 .attr("dy", 18) |
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|
662 .attr("alignment-baseline", "hanging"); |
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|
663 |
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664 eventRect |
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665 .on("mouseover", () => { |
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666 this.diagram.select(".chart-dot").style("opacity", 1); |
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667 this.diagram.select(".chart-tooltip").style("opacity", 1); |
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|
668 }) |
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669 .on("mouseout", () => { |
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670 this.diagram.select(".chart-dot").style("opacity", 0); |
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671 this.diagram.select(".chart-tooltip").style("opacity", 0); |
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672 }) |
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673 .on("mousemove", () => { |
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|
674 // find data point closest to mouse |
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|
675 const x0 = this.scale.x.invert( |
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676 d3.mouse(document.querySelector(".zoom"))[0] |
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|
677 ), |
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678 i = d3.bisector(d => d.date).left(this.waterlevels, x0, 1), |
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679 d0 = this.waterlevels[i - 1], |
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|
680 d1 = this.waterlevels[i] || d0, |
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681 d = x0 - d0.date > d1.date - x0 ? d1 : d0; |
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parents:
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|
682 |
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683 const coords = { |
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684 x: this.scale.x(d.date), |
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685 y: this.scale.y(d.waterlevel) |
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|
686 }; |
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687 |
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688 // position the dot |
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689 this.diagram |
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690 .select(".chart-dot") |
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691 .style("opacity", 1) |
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692 .attr("transform", `translate(${coords.x}, ${coords.y})`); |
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693 |
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694 // write date |
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695 this.diagram.select(".chart-tooltip text tspan:first-child").text( |
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696 d.date.toLocaleString([], { |
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697 year: "2-digit", |
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698 month: "2-digit", |
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699 day: "2-digit", |
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700 hour: "2-digit", |
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701 minute: "2-digit" |
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702 }) |
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703 ); |
2816
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704 // write waterlevel |
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705 this.diagram |
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706 .select(".chart-tooltip text tspan:last-child") |
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|
707 .text(d.waterlevel + " cm"); |
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708 |
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709 // get text dimensions |
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710 const textBBox = this.diagram |
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711 .select(".chart-tooltip text") |
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712 .node() |
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713 .getBBox(); |
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714 |
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715 this.diagram |
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716 .selectAll(".chart-tooltip text tspan") |
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717 .attr("x", textBBox.width / 2 + padding) |
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718 .attr("y", padding); |
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719 |
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720 // position and scale tooltip box |
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721 |
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722 let xMax = this.dimensions.width - textBBox.width; |
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723 let tooltipX = Math.min(coords.x - textBBox.width / 2, xMax); |
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724 let tooltipY = coords.y - textBBox.height * 2 + padding * 2; |
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725 this.diagram |
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726 .select(".chart-tooltip") |
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727 .style("opacity", 1) |
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728 .attr("transform", `translate(${tooltipX}, ${tooltipY})`) |
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729 .select("rect") |
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730 .attr("width", textBBox.width + padding * 2) |
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731 .attr("height", textBBox.height + padding * 2); |
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732 }); |
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733 }, |
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734 isNext(seconds) { |
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735 // helper to check whether points in the chart are "next to each other" |
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736 // for that they need to be exactly the specified amount of seconds apart. |
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737 return (prev, current) => current.date - prev.date === seconds * 1000; |
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738 } |
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|
739 }, |
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|
740 created() { |
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741 window.addEventListener("resize", debounce(this.drawDiagram), 100); |
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742 }, |
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|
743 mounted() { |
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744 this.drawDiagram(); |
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745 }, |
2590
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746 updated() { |
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|
747 this.drawDiagram(); |
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|
748 } |
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|
749 }; |
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Markus Kottlaender <markus@intevation.de>
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|
750 </script> |