Mercurial > gemma

annotate client/src/components/gauge/Waterlevel.vue @ 2647:c52bf6f994c0

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overview2: bottleneckview added
author Thomas Junk <thomas.junk@intevation.de>
date Thu, 14 Mar 2019 14:07:25 +0100
parents 30697735a7bc
children 4ffae834276e
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1 <template>
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2 <div class="flex-fill diagram-container"></div>
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3 </template>
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4
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5 <style lang="sass" scoped>
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6 .diagram-container
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7 /deep/
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8 .line
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9 stroke: steelblue
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10 stroke-width: 2
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11 fill: transparent
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12 clip-path: url(#clip)
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13
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14 .zoom
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15 cursor: move
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16 fill: none
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17 pointer-events: all
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18
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19 .hdc-line,
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20 .ldc-line,
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21 .mw-line
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22 stroke-width: 1
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23 fill: transparent
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24 clip-path: url(#clip)
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25 .hdc-line
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26 stroke: red
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27 .ldc-line
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28 stroke: green
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29 .mw-line
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30 stroke: grey
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31 .ref-waterlevel-label
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32 font-size: 11px
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33 fill: #999
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34 .hdc-ldc-area
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35 fill: rgba(0, 255, 0, 0.15)
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36 .brush
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37 .selection
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38 stroke: transparent
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39 fill-opacity: 0.2
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40 .handle
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41 stroke: rgba($color-info, 0.5)
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42 fill: rgba($color-info, 0.5)
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43 </style>
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44
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45 <script>
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46 /* This is Free Software under GNU Affero General Public License v >= 3.0
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47 * without warranty, see README.md and license for details.
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48 *
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49 * SPDX-License-Identifier: AGPL-3.0-or-later
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50 * License-Filename: LICENSES/AGPL-3.0.txt
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51 *
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52 * Copyright (C) 2018 by via donau
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53 * – Österreichische Wasserstraßen-Gesellschaft mbH
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54 * Software engineering by Intevation GmbH
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55 *
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56 * Author(s):
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57 * Markus Kottländer <markus.kottlaender@intevation.de>
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58 */
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59
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60 import { mapState, mapGetters } from "vuex";
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61 import * as d3 from "d3";
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62 import debounce from "debounce";
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63
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64 export default {
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65 computed: {
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66 ...mapState("gauges", ["waterlevels"]),
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67 ...mapGetters("gauges", ["selectedGauge"])
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68 },
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69 watch: {
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70 waterlevels() {
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71 this.drawDiagram();
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72 }
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73 },
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74 methods: {
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75 drawDiagram() {
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76 if (!this.selectedGauge || !this.waterlevels.length) return;
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77
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78 // remove old diagram
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79 d3.select(".diagram-container svg").remove();
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80
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81 // get HDC/LDC/MW of the gauge
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82 let refWaterLevels = JSON.parse(
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83 this.selectedGauge.properties.reference_water_levels
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84 );
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85
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86 // CREATE SVG AND SET DIMENSIONS/MARGINS
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87
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88 let svgWidth = document.querySelector(".diagram-container").clientWidth;
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89 let svgHeight = document.querySelector(".diagram-container").clientHeight;
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90 let svg = d3
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91 .select(".diagram-container")
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92 .append("svg")
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93 .attr("width", "100%")
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94 .attr("height", "100%");
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95 let mainMargin = { top: 50, right: 20, bottom: 110, left: 80 },
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96 navMargin = {
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97 top: svgHeight - mainMargin.top - 35,
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98 right: 20,
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99 bottom: 30,
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100 left: 80
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101 },
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102 width = +svgWidth - mainMargin.left - mainMargin.right,
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103 mainHeight = +svgHeight - mainMargin.top - mainMargin.bottom,
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104 navHeight = +svgHeight - navMargin.top - navMargin.bottom;
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105
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106 // PREPARING AXES/SCALING
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107
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108 // scaling helpers to convert real values to pixels
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109 // based on the diagrams dimensions
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110 let x = d3.scaleTime().range([0, width]),
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111 x2 = d3.scaleTime().range([0, width]),
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112 y = d3.scaleLinear().range([mainHeight, 0]),
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113 y2 = d3.scaleLinear().range([navHeight, 0]);
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114 // find min/max values for the waterlevel axis
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115 // including hdc/ldc (+/- 100 cm)
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116 let WaterlevelMinMax = d3.extent(
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117 [
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118 ...this.waterlevels,
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119 { waterlevel: refWaterLevels.HDC + 100 },
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120 { waterlevel: Math.max(refWaterLevels.LDC - 100, 0) }
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121 ],
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122 d => d.waterlevel
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123 );
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124 // setting the min and max values for the diagram axes
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125 x.domain(d3.extent(this.waterlevels, d => d.date));
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126 y.domain(WaterlevelMinMax);
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127 x2.domain(x.domain());
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128 y2.domain(y.domain());
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129 // creating the axes based on these scales
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130 let xAxis = d3.axisBottom(x),
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131 xAxis2 = d3.axisBottom(x2),
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132 yAxis = d3.axisLeft(y);
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133
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134 // PREPARING CHART FUNCTIONS
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135
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136 // waterlevel line in big chart
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137 let mainLineChart = d3
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138 .line()
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139 .curve(d3.curveMonotoneX)
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140 .x(d => x(d.date))
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141 .y(d => y(d.waterlevel));
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142 // waterlevel line in small chart
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143 let navLineChart = d3
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144 .line()
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145 .curve(d3.curveMonotoneX)
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146 .x(d => x2(d.date))
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147 .y(d => y2(d.waterlevel));
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148 // hdc/ldc/mw
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149 let refWaterlevelLine = d3
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150 .line()
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151 .x(d => x(d.x))
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152 .y(d => y(d.y));
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153
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154 // DRAWING MAINCHART
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155
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156 // define visible chart area
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157 // everything outside this area will be hidden (clipped)
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158 svg
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159 .append("defs")
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160 .append("clipPath")
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161 .attr("id", "clip")
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162 .append("rect")
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163 .attr("width", width)
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164 .attr("height", mainHeight);
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165
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166 let mainChart = svg
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167 .append("g")
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168 .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`);
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169
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170 // axes
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171 mainChart
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172 .append("g")
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173 .attr("transform", `translate(0, ${mainHeight})`)
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174 .call(xAxis);
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175 mainChart // label
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176 .append("text")
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177 .text(this.$gettext("Waterlevel [cm]"))
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178 .attr("text-anchor", "middle")
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179 .attr("transform", `translate(-45, ${mainHeight / 2}) rotate(-90)`);
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180 mainChart.append("g").call(yAxis);
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181
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182 // reference waterlevels
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183 // filling area between HDC and LDC
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184 mainChart
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185 .append("rect")
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186 .attr("class", "hdc-ldc-area")
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187 .attr("x", 0)
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188 .attr("y", y(refWaterLevels.HDC))
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189 .attr("width", width)
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190 .attr("height", y(refWaterLevels.LDC) - y(refWaterLevels.HDC));
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191
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192 let lastDate = this.waterlevels[this.waterlevels.length - 1].date;
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193 // HDC
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194 mainChart
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195 .append("path")
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196 .datum([
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197 { x: 0, y: refWaterLevels.HDC },
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198 { x: lastDate, y: refWaterLevels.HDC }
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199 ])
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200 .attr("class", "hdc-line")
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201 .attr("d", refWaterlevelLine);
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202 mainChart // label
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203 .append("text")
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204 .text("HDC")
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205 .attr("class", "ref-waterlevel-label")
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206 .attr("x", x(lastDate) - 20)
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207 .attr("y", y(refWaterLevels.HDC) - 3);
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208 // LDC
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209 mainChart
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210 .append("path")
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211 .datum([
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212 { x: 0, y: refWaterLevels.LDC },
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213 { x: lastDate, y: refWaterLevels.LDC }
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214 ])
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215 .attr("class", "ldc-line")
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216 .attr("d", refWaterlevelLine);
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217 mainChart // label
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218 .append("text")
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219 .text("LDC")
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220 .attr("class", "ref-waterlevel-label")
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221 .attr("x", x(lastDate) - 20)
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222 .attr("y", y(refWaterLevels.LDC) - 3);
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223 // MW
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224 mainChart
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225 .append("path")
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226 .datum([
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227 { x: 0, y: refWaterLevels.MW },
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228 { x: lastDate, y: refWaterLevels.MW }
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229 ])
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230 .attr("class", "mw-line")
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231 .attr("d", refWaterlevelLine);
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232 mainChart // label
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233 .append("text")
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234 .text("MW")
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235 .attr("class", "ref-waterlevel-label")
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236 .attr("x", x(lastDate) - 20)
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237 .attr("y", y(refWaterLevels.MW) - 3);
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238
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239 // waterlevel chart
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240 mainChart
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241 .append("path")
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242 .datum(this.waterlevels)
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243 .attr("class", "line")
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244 .attr("d", mainLineChart);
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245
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246 // DRAWING NAVCHART
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247
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248 let navChart = svg
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249 .append("g")
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250 .attr("transform", `translate(${navMargin.left}, ${navMargin.top})`);
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251
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252 // axis (nav chart only has y-axis)
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253 navChart
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254 .append("g")
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255 .attr("class", "axis axis--x")
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256 .attr("transform", `translate(0, ${navHeight})`)
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257 .call(xAxis2);
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258
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259 // waterlevel chart
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260 navChart
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261 .append("path")
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262 .datum(this.waterlevels)
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263 .attr("class", "line")
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264 .attr("d", navLineChart);
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265
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266 // INTERACTIVITY
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267
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268 // selecting time period in nav chart
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269 let brush = d3
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270 .brushX()
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271 .handleSize(4)
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272 .extent([[0, 0], [width, navHeight]])
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273 .on("brush end", () => {
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274 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom")
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275 return; // ignore brush-by-zoom
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276 let s = d3.event.selection || x2.range();
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277 x.domain(s.map(x2.invert, x2));
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278 mainChart.select(".line").attr("d", mainLineChart);
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279 mainChart.select(".axis--x").call(xAxis);
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280 svg
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281 .select(".zoom")
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282 .call(
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283 zoom.transform,
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284 d3.zoomIdentity.scale(width / (s[1] - s[0])).translate(-s[0], 0)
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285 );
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286 });
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287
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288 // zooming with mousewheel in main chart
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289 let zoom = d3
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290 .zoom()
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291 .scaleExtent([1, Infinity])
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292 .translateExtent([[0, 0], [width, mainHeight]])
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293 .extent([[0, 0], [width, mainHeight]])
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294 .on("zoom", () => {
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295 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush")
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296 return; // ignore zoom-by-brush
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297 let t = d3.event.transform;
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298 x.domain(t.rescaleX(x2).domain());
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299 mainChart.select(".line").attr("d", mainLineChart);
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300 mainChart.select(".axis--x").call(xAxis);
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301 navChart
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302 .select(".brush")
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303 .call(brush.move, x.range().map(t.invertX, t));
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304 });
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305
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306 navChart
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307 .append("g")
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308 .attr("class", "brush")
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309 .call(brush)
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310 .call(brush.move, x.range());
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311
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312 svg
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313 .append("rect")
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314 .attr("class", "zoom")
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315 .attr("width", width)
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316 .attr("height", mainHeight)
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317 .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`)
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318 .call(zoom);
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319 }
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320 },
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321 created() {
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322 window.addEventListener("resize", debounce(this.drawDiagram), 100);
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323 },
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324 mounted() {
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325 this.drawDiagram();
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326 },
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327 updated() {
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328 this.drawDiagram();
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329 }
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330 };
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331 </script>