Mercurial > gemma
annotate client/src/components/gauge/Waterlevel.vue @ 2645:6374fc404fdc
client: waterlevel diagram: draw filled area between HDC and LDC
author | Markus Kottlaender <markus@intevation.de> |
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date | Thu, 14 Mar 2019 13:36:13 +0100 |
parents | ffef5f89b31c |
children | 30697735a7bc |
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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 fill: rgba($color-info, 0.5) |
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42 </style> |
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43 |
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44 <script> |
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45 /* This is Free Software under GNU Affero General Public License v >= 3.0 |
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46 * without warranty, see README.md and license for details. |
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47 * |
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48 * SPDX-License-Identifier: AGPL-3.0-or-later |
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49 * License-Filename: LICENSES/AGPL-3.0.txt |
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50 * |
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51 * Copyright (C) 2018 by via donau |
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52 * – Österreichische Wasserstraßen-Gesellschaft mbH |
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53 * Software engineering by Intevation GmbH |
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54 * |
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55 * Author(s): |
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56 * Markus Kottländer <markus.kottlaender@intevation.de> |
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57 */ |
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58 |
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59 import { mapState, mapGetters } from "vuex"; |
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60 import * as d3 from "d3"; |
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61 import debounce from "debounce"; |
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62 |
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63 export default { |
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64 computed: { |
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65 ...mapState("gauges", ["waterlevels"]), |
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66 ...mapGetters("gauges", ["selectedGauge"]) |
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67 }, |
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68 watch: { |
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69 waterlevels() { |
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70 this.drawDiagram(); |
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71 } |
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72 }, |
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73 methods: { |
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74 drawDiagram() { |
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75 if (!this.selectedGauge || !this.waterlevels.length) return; |
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76 |
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77 // remove old diagram |
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78 d3.select(".diagram-container svg").remove(); |
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79 |
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80 // get HDC/LDC/MW of the gauge |
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81 let refWaterLevels = JSON.parse( |
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82 this.selectedGauge.properties.reference_water_levels |
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83 ); |
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84 |
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85 // CREATE SVG AND SET DIMENSIONS/MARGINS |
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86 |
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87 let svgWidth = document.querySelector(".diagram-container").clientWidth; |
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88 let svgHeight = document.querySelector(".diagram-container").clientHeight; |
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89 let svg = d3 |
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90 .select(".diagram-container") |
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91 .append("svg") |
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92 .attr("width", "100%") |
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93 .attr("height", "100%"); |
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94 let mainMargin = { top: 50, right: 20, bottom: 110, left: 80 }, |
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95 navMargin = { |
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96 top: svgHeight - mainMargin.top - 35, |
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97 right: 20, |
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98 bottom: 30, |
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99 left: 80 |
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100 }, |
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101 width = +svgWidth - mainMargin.left - mainMargin.right, |
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102 mainHeight = +svgHeight - mainMargin.top - mainMargin.bottom, |
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103 navHeight = +svgHeight - navMargin.top - navMargin.bottom; |
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104 |
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105 // PREPARING AXES/SCALING |
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106 |
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107 // scaling helpers to convert real values to pixels |
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108 // based on the diagrams dimensions |
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109 let x = d3.scaleTime().range([0, width]), |
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110 x2 = d3.scaleTime().range([0, width]), |
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111 y = d3.scaleLinear().range([mainHeight, 0]), |
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112 y2 = d3.scaleLinear().range([navHeight, 0]); |
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113 // find min/max values for the waterlevel axis |
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114 // including hdc/ldc (+/- 100 cm) |
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115 let WaterlevelMinMax = d3.extent( |
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116 [ |
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117 ...this.waterlevels, |
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118 { waterlevel: refWaterLevels.HDC + 100 }, |
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119 { waterlevel: Math.max(refWaterLevels.LDC - 100, 0) } |
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120 ], |
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121 d => d.waterlevel |
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122 ); |
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123 // setting the min and max values for the diagram axes |
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124 x.domain(d3.extent(this.waterlevels, d => d.date)); |
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125 y.domain(WaterlevelMinMax); |
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126 x2.domain(x.domain()); |
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127 y2.domain(y.domain()); |
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128 // creating the axes based on these scales |
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129 let xAxis = d3.axisBottom(x), |
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130 xAxis2 = d3.axisBottom(x2), |
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131 yAxis = d3.axisLeft(y); |
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132 |
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133 // PREPARING CHART FUNCTIONS |
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134 |
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135 // waterlevel line in big chart |
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136 let mainLineChart = d3 |
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137 .line() |
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138 .curve(d3.curveMonotoneX) |
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139 .x(d => x(d.date)) |
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140 .y(d => y(d.waterlevel)); |
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141 // waterlevel line in small chart |
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142 let navLineChart = d3 |
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143 .line() |
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144 .curve(d3.curveMonotoneX) |
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145 .x(d => x2(d.date)) |
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146 .y(d => y2(d.waterlevel)); |
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147 // hdc/ldc/mw |
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148 let refWaterlevelLine = d3 |
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149 .line() |
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150 .x(d => x(d.x)) |
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151 .y(d => y(d.y)); |
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152 |
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153 // DRAWING MAINCHART |
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154 |
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155 // define visible chart area |
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156 // everything outside this area will be hidden (clipped) |
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157 svg |
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158 .append("defs") |
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159 .append("clipPath") |
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160 .attr("id", "clip") |
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161 .append("rect") |
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162 .attr("width", width) |
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163 .attr("height", mainHeight); |
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164 |
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165 let mainChart = svg |
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166 .append("g") |
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167 .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`); |
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168 |
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169 // axes |
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170 mainChart |
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171 .append("g") |
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172 .attr("transform", `translate(0, ${mainHeight})`) |
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173 .call(xAxis); |
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174 mainChart // label |
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175 .append("text") |
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176 .text(this.$gettext("Waterlevel [cm]")) |
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177 .attr("text-anchor", "middle") |
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178 .attr("transform", `translate(-45, ${mainHeight / 2}) rotate(-90)`); |
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179 mainChart.append("g").call(yAxis); |
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180 |
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181 // reference waterlevels |
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182 // filling area between HDC and LDC |
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183 mainChart |
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184 .append("rect") |
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185 .attr("class", "hdc-ldc-area") |
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186 .attr("x", 0) |
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187 .attr("y", y(refWaterLevels.HDC)) |
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188 .attr("width", width) |
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189 .attr("height", y(refWaterLevels.LDC) - y(refWaterLevels.HDC)); |
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190 |
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191 let lastDate = this.waterlevels[this.waterlevels.length - 1].date; |
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192 // HDC |
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193 mainChart |
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194 .append("path") |
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195 .datum([ |
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196 { x: 0, y: refWaterLevels.HDC }, |
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197 { x: lastDate, y: refWaterLevels.HDC } |
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198 ]) |
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199 .attr("class", "hdc-line") |
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200 .attr("d", refWaterlevelLine); |
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201 mainChart // label |
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202 .append("text") |
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203 .text("HDC") |
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204 .attr("class", "ref-waterlevel-label") |
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205 .attr("x", x(lastDate) - 20) |
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206 .attr("y", y(refWaterLevels.HDC) - 3); |
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207 // LDC |
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208 mainChart |
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209 .append("path") |
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210 .datum([ |
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211 { x: 0, y: refWaterLevels.LDC }, |
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212 { x: lastDate, y: refWaterLevels.LDC } |
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213 ]) |
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214 .attr("class", "ldc-line") |
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215 .attr("d", refWaterlevelLine); |
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216 mainChart // label |
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217 .append("text") |
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218 .text("LDC") |
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219 .attr("class", "ref-waterlevel-label") |
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220 .attr("x", x(lastDate) - 20) |
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221 .attr("y", y(refWaterLevels.LDC) - 3); |
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222 // MW |
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223 mainChart |
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224 .append("path") |
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225 .datum([ |
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226 { x: 0, y: refWaterLevels.MW }, |
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227 { x: lastDate, y: refWaterLevels.MW } |
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228 ]) |
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229 .attr("class", "mw-line") |
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230 .attr("d", refWaterlevelLine); |
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231 mainChart // label |
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232 .append("text") |
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233 .text("MW") |
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234 .attr("class", "ref-waterlevel-label") |
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235 .attr("x", x(lastDate) - 20) |
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236 .attr("y", y(refWaterLevels.MW) - 3); |
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237 |
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238 // waterlevel chart |
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239 mainChart |
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240 .append("path") |
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241 .datum(this.waterlevels) |
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242 .attr("class", "line") |
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243 .attr("d", mainLineChart); |
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244 |
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245 // DRAWING NAVCHART |
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246 |
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247 let navChart = svg |
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248 .append("g") |
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249 .attr("transform", `translate(${navMargin.left}, ${navMargin.top})`); |
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250 |
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251 // axis (nav chart only has y-axis) |
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252 navChart |
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253 .append("g") |
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254 .attr("class", "axis axis--x") |
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255 .attr("transform", `translate(0, ${navHeight})`) |
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256 .call(xAxis2); |
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257 |
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258 // waterlevel chart |
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259 navChart |
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260 .append("path") |
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261 .datum(this.waterlevels) |
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262 .attr("class", "line") |
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263 .attr("d", navLineChart); |
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264 |
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265 // INTERACTIVITY |
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266 |
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267 // selecting time period in nav chart |
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268 let brush = d3 |
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269 .brushX() |
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270 .handleSize(4) |
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271 .extent([[0, 0], [width, navHeight]]) |
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272 .on("brush end", () => { |
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273 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") |
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274 return; // ignore brush-by-zoom |
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275 let s = d3.event.selection || x2.range(); |
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276 x.domain(s.map(x2.invert, x2)); |
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277 mainChart.select(".line").attr("d", mainLineChart); |
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278 mainChart.select(".axis--x").call(xAxis); |
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279 svg |
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280 .select(".zoom") |
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281 .call( |
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282 zoom.transform, |
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283 d3.zoomIdentity.scale(width / (s[1] - s[0])).translate(-s[0], 0) |
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284 ); |
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285 }); |
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286 |
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287 // zooming with mousewheel in main chart |
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288 let zoom = d3 |
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289 .zoom() |
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290 .scaleExtent([1, Infinity]) |
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291 .translateExtent([[0, 0], [width, mainHeight]]) |
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292 .extent([[0, 0], [width, mainHeight]]) |
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293 .on("zoom", () => { |
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294 if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") |
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295 return; // ignore zoom-by-brush |
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296 let t = d3.event.transform; |
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297 x.domain(t.rescaleX(x2).domain()); |
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298 mainChart.select(".line").attr("d", mainLineChart); |
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299 mainChart.select(".axis--x").call(xAxis); |
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300 navChart |
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301 .select(".brush") |
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302 .call(brush.move, x.range().map(t.invertX, t)); |
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303 }); |
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304 |
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305 navChart |
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306 .append("g") |
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307 .attr("class", "brush") |
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308 .call(brush) |
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309 .call(brush.move, x.range()); |
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310 |
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311 svg |
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312 .append("rect") |
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313 .attr("class", "zoom") |
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314 .attr("width", width) |
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315 .attr("height", mainHeight) |
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316 .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`) |
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317 .call(zoom); |
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318 } |
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319 }, |
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320 created() { |
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321 window.addEventListener("resize", debounce(this.drawDiagram), 100); |
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322 }, |
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323 mounted() { |
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324 this.drawDiagram(); |
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325 }, |
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326 updated() { |
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327 this.drawDiagram(); |
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328 } |
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329 }; |
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330 </script> |