Mercurial > gemma
view client/src/components/gauge/HydrologicalConditions.vue @ 3722:f180de37903c
client: hydrological conditions diagram: handle gauges without reference waterlevels
author | Markus Kottlaender <markus@intevation.de> |
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date | Thu, 20 Jun 2019 18:10:08 +0200 |
parents | afc8ac7001ee |
children | 05bbd1a97567 |
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<template> <div class="d-flex flex-column flex-fill"> <UIBoxHeader icon="ruler-vertical" :title="title" :closeCallback="close" class="rounded-0" /> <div class="d-flex flex-fill"> <DiagramLegend id="diagramlegendId"> <div class="legend"> <span style="background-color: red; width: 20px; height: 20px;" ></span> {{ yearCompare }} </div> <div class="legend"> <span style="background-color: orange; width: 20px; height: 20px;" ></span> Q25% </div> <div class="legend"> <span style="background-color: black; width: 20px; height: 20px;" ></span> Median </div> <div class="legend"> <span style="background-color: purple; width: 20px; height: 20px;" ></span> Q75% </div> <div class="legend"> <span style="background-color: lightsteelblue; width: 20px; height: 20px;" ></span> Long-term Amplitude </div> <select @change="applyChange" v-model="form.template" class="form-control d-block custom-select-sm w-100" > <option v-for="template in templates" :value="template" :key="template.name" > {{ template.name }} </option> </select> <div> <button @click="downloadPDF" type="button" class="btn btn-sm btn-info d-block w-100 mt-2" :disabled="!longtermWaterlevels.length" > <translate>Export to PDF</translate> </button> </div> <a :class="[ 'btn btn-sm btn-info d-block w-100 mt-2', { disabled: !longtermWaterlevels.length } ]" :href="csvLink" :download="csvFileName" > <translate>Export as CSV</translate> </a> </DiagramLegend> <div class="d-flex flex-fill justify-content-center align-items-center" :id="containerId" > <div v-if="!longtermWaterlevels.length"> <translate>No data available.</translate> </div> </div> </div> <div id="tmpContainer" style="position: absolute; z-index: -1; top: 600px;" ></div> </div> </template> <script> /* This is Free Software under GNU Affero General Public License v >= 3.0 * without warranty, see README.md and license for details. * * SPDX-License-Identifier: AGPL-3.0-or-later * License-Filename: LICENSES/AGPL-3.0.txt * * Copyright (C) 2019 by via donau * – Österreichische Wasserstraßen-Gesellschaft mbH * Software engineering by Intevation GmbH * * Author(s): * Markus Kottländer <markus.kottlaender@intevation.de> * Fadi Abbud <fadi.abbud@intevation.de> */ import { mapState, mapGetters } from "vuex"; import * as d3 from "d3"; import debounce from "debounce"; import { startOfYear, endOfYear } from "date-fns"; import jsPDF from "jspdf"; import canvg from "canvg"; import { pdfgen } from "@/lib/mixins"; import { HTTP } from "@/lib/http"; import { displayError } from "@/lib/errors"; export default { mixins: [pdfgen], components: { DiagramLegend: () => import("@/components/DiagramLegend") }, data() { return { containerId: "hydrologicalconditions-diagram-container", resizeListenerFunction: null, svg: null, diagram: null, navigation: null, dimensions: null, extent: null, scale: null, axes: null, templateData: null, form: { template: null, form: null }, templates: [], defaultTemplate: { name: "Default", properties: { paperSize: "a4" }, elements: [ { type: "diagram", position: "topleft", offset: { x: 15, y: 50 }, width: 290, height: 100 }, { type: "diagramlegend", position: "topleft", offset: { x: 30, y: 150 }, colot: "black" }, { type: "diagramtitle", position: "topleft", offset: { x: 50, y: 26 }, fontsize: 22, color: "steelblue" } ] }, pdf: { doc: null, width: 420, height: 297 } }; }, computed: { ...mapState("application", ["paneSetup"]), ...mapState("gauges", [ "longtermWaterlevels", "yearWaterlevels", "yearCompare", "longtermInterval" ]), ...mapGetters("gauges", ["selectedGauge"]), title() { return `${this.selectedGauge.properties.objname}: ${this.$gettext( "Hydrological Conditions" )} (${this.longtermInterval.join(" - ")})`; }, csvLink() { return "data:text/csv;charset=utf-8," + encodeURIComponent(this.csvData); }, csvFileName() { return `${this.$gettext("hydrological-conditions")}-${ this.selectedGauge.properties.objname }-${this.longtermInterval.join(" - ")}.csv`; }, csvData() { // We cannot directly use the csv data provided by the backend because the // diagram uses data from two endpoints, longterm- and yearWaterlevels. // So we need to merge them here to have them in one csv export. let merged = this.longtermWaterlevels .filter(d => d) // copy array, don't mutate original .map(d => { let yearData = this.yearWaterlevels.find(y => { return d.date.getTime() === y.date.getTime(); }); d[this.yearCompare] = yearData ? yearData.mean : ""; return `${d.date.getMonth() + 1}-${d.date.getDate()};${d.min};${ d.max };${d.mean};${d.median};${d.q25};${d.q75};${d[this.yearCompare]}`; }) .join("\n"); return `#Interval: ${this.longtermInterval.join( " - " )}\n#date;#min;#max;#mean;#median;#q25;#q75;#${ this.yearCompare }\n${merged}`; } }, watch: { paneSetup() { this.$nextTick(() => this.drawDiagram()); }, longtermWaterlevels() { this.drawDiagram(); }, yearWaterlevels() { this.drawDiagram(); } }, methods: { close() { this.$store.commit( "application/paneSetup", this.paneSetup === "GAUGE_WATERLEVEL_HYDROLOGICALCONDITIONS" ? "GAUGE_WATERLEVEL" : "DEFAULT" ); }, downloadPDF() { if (this.templateData) { this.pdf.doc = new jsPDF( "l", "mm", this.templateData.properties.paperSize ); // pdf width and height in millimeter (landscape) this.pdf.width = this.templateData.properties.paperSize === "a3" ? 420 : 297; this.pdf.height = this.templateData.properties.paperSize === "a3" ? 297 : 210; // default values if some are missing in template let defaultFontSize = 11, defaultColor = "black", defaultWidth = 70, defaultTextColor = "black", defaultBorderColor = "white", defaultBgColor = "white", defaultRounding = 2, defaultPadding = 2, defaultOffset = { x: 0, y: 0 }; this.templateData.elements.forEach(e => { switch (e.type) { case "diagram": { this.addDiagram( e.position, e.offset || defaultOffset, e.width, e.height ); break; } case "diagramtitle": { let gaugeInfo = this.selectedGauge.properties.objname + " (" + this.selectedGauge.id .split(".")[1] .replace(/[()]/g, "") .split(",")[3] + "): Hydrological Conditions " + this.longtermInterval.join(" - "); this.addDiagramTitle( e.position, e.offset || defaultOffset, e.fontsize || defaultFontSize, e.color || defaultColor, gaugeInfo ); break; } case "diagramlegend": { this.addDiagramLegend( e.position, e.offset || defaultOffset, e.color || defaultColor ); break; } case "image": { this.addImage( e.url, e.format || "", e.position, e.offset || defaultOffset, e.width || 90, e.height || 60 ); break; } case "text": { this.addText( e.position, e.offset || defaultOffset, e.width || defaultWidth, e.fontsize || defaultFontSize, e.color || defaultTextColor, e.text || "" ); break; } case "box": { this.addBox( e.position, e.offset || defaultOffset, e.width || 90, e.height || 60, e.rounding === 0 || e.rounding ? e.rounding : defaultRounding, e.color || defaultBgColor, e.brcolor || defaultBorderColor ); break; } case "textbox": { this.addTextBox( e.position, e.offset || defaultOffset, e.width, e.height, e.rounding === 0 || e.rounding ? e.rounding : defaultRounding, e.padding || defaultPadding, e.fontsize || defaultFontSize, e.color || defaultTextColor, e.background || defaultBgColor, e.text || "", e.brcolor || defaultBorderColor ); break; } } }); } this.pdf.doc.save( this.selectedGauge.properties.objname + " Hydrological-condition Diagram.pdf" ); }, addDiagram(position, offset, width, height) { let x = offset.x, y = offset.y; // check if there are tow diagrams on the screen // draw the diagram in a separated html element to get the full size if ( ["GAUGE_WATERLEVEL_HYDROLOGICALCONDITIONS"].indexOf(this.paneSetup) !== -1 ) { this.containerId = "tmpContainer"; // set width and height document.querySelector("#tmpContainer").style.width = document.querySelector("#hydrologicalconditions-diagram-container") .clientWidth * 2 + document.querySelector("#diagramlegendId").clientWidth + "px"; document.querySelector("#tmpContainer").style.height = document.querySelector("#hydrologicalconditions-diagram-container") .clientHeight + "px"; this.drawDiagram(); } var svg = document.getElementById(this.containerId).innerHTML; if (svg) { svg = svg.replace(/\r?\n|\r/g, "").trim(); } this.containerId = "hydrologicalconditions-diagram-container"; var canvas = document.createElement("canvas"); canvas.width = window.innerWidth; canvas.height = window.innerHeight / 2; canvg(canvas, svg, { ignoreMouse: true, ignoreAnimation: true, ignoreDimensions: true }); var imgData = canvas.toDataURL("image/png"); // use default width,height if they are missing in the template definition if (!width) { width = this.templateData.properties.paperSize === "a3" ? 380 : 290; } if (!height) { height = this.templateData.properties.paperSize === "a3" ? 130 : 100; } if (["topright", "bottomright"].indexOf(position) !== -1) { x = this.pdf.width - offset.x - width; } if (["bottomright", "bottomleft"].indexOf(position) !== -1) { y = this.pdf.height - offset.y - height; } this.pdf.doc.addImage(imgData, "PNG", x, y, width, height); }, applyChange() { if (this.form.template.hasOwnProperty("properties")) { this.templateData = this.defaultTemplate; return; } if (this.form.template) { HTTP.get("/templates/diagram/" + this.form.template.name, { headers: { "X-Gemma-Auth": localStorage.getItem("token"), "Content-type": "text/xml; charset=UTF-8" } }) .then(response => { this.templateData = response.data.template_data; }) .catch(e => { const { status, data } = e.response; displayError({ title: this.$gettext("Backend Error"), message: `${status}: ${data.message || data}` }); }); } }, // Diagram legend addDiagramLegend(position, offset, color) { let x = offset.x, y = offset.y; let width = (this.pdf.doc.getStringUnitWidth("Long-term Amplitude") * 10) / (72 / 25.6) + 5; // if position is on the right, x needs to be calculate with pdf width and // the size of the element if (["topright", "bottomright"].indexOf(position) !== -1) { x = this.pdf.width - offset.x - width; } if (["bottomright", "bottomleft"].indexOf(position) !== -1) { y = this.pdf.height - offset.y - this.getTextHeight(4); } this.pdf.doc.setFontSize(10); this.pdf.doc.setTextColor(color); this.pdf.doc.setDrawColor("white"); this.pdf.doc.setFillColor("red"); this.pdf.doc.circle(x, y, 2, "FD"); this.pdf.doc.text(x + 3, y + 1, "" + this.yearCompare); this.pdf.doc.setFillColor("orange"); this.pdf.doc.circle(x, y + 5, 2, "FD"); this.pdf.doc.text(x + 3, y + 6, "Q25%"); this.pdf.doc.setFillColor("black"); this.pdf.doc.circle(x, y + 10, 2, "FD"); this.pdf.doc.text(x + 3, y + 11, "Median "); this.pdf.doc.setFillColor("purple"); this.pdf.doc.circle(x, y + 15, 2, "FD"); this.pdf.doc.text(x + 3, y + 16, "Q75%"); this.pdf.doc.setFillColor("lightsteelblue"); this.pdf.doc.circle(x, y + 20, 2, "FD"); this.pdf.doc.text(x + 3, y + 21, "Long-term Amplitude"); }, drawDiagram() { // remove old diagram d3.select("#" + this.containerId + " svg").remove(); if (!this.selectedGauge || !this.longtermWaterlevels.length) return; // PREPARE HELPERS // HDC/LDC/MW for the selected gauge const refWaterLevels = JSON.parse( this.selectedGauge.properties.reference_water_levels ); // dimensions (widths, heights, margins) this.dimensions = this.getDimensions(); // get min/max values for date and waterlevel axis this.extent = this.getExtent(refWaterLevels); // scaling helpers this.scale = this.getScale(); // creating the axes based on the scales this.axes = this.getAxes(); // DRAW DIAGRAM/NAVIGATION AREAS // create svg this.svg = d3 .select("#" + this.containerId) .append("svg") .attr("width", "100%") .attr("height", "100%"); // create container for main diagram this.diagram = this.svg .append("g") .attr("class", "main") .attr( "transform", `translate(${this.dimensions.mainMargin.left}, ${ this.dimensions.mainMargin.top })` ); // create container for navigation diagram this.navigation = this.svg .append("g") .attr("class", "nav") .attr( "transform", `translate(${this.dimensions.navMargin.left}, ${ this.dimensions.navMargin.top })` ); // define visible area, everything outside this area will be hidden this.svg .append("defs") .append("clipPath") .attr("id", "hydrocond-clip") .append("rect") .attr("width", this.dimensions.width) .attr("height", this.dimensions.mainHeight); // DRAW DIAGRAM PARTS // Each drawSomething function (with the exception of drawRefLines) // returns a fuction to update the respective chart/area/etc. These // updater functions are used by the zoom feature to rescale all elements. const updaters = []; // draw updaters.push(this.drawAxes()); updaters.push(this.drawWaterlevelMinMaxAreaChart()); updaters.push(this.drawWaterlevelLineChart("median")); updaters.push(this.drawWaterlevelLineChart("q25")); updaters.push(this.drawWaterlevelLineChart("q75")); updaters.push(this.drawWaterlevelLineChart("mean", this.yearWaterlevels)); updaters.push(this.drawNowLines()); if (refWaterLevels) { this.drawRefLines(refWaterLevels); // static, doesn't need an updater } // INTERACTIONS // create rectanlge on the main chart area to capture mouse events const eventRect = this.svg .append("rect") .attr("id", "zoom-hydrocond") .attr("class", "zoom") .attr("width", this.dimensions.width) .attr("height", this.dimensions.mainHeight) .attr( "transform", `translate(${this.dimensions.mainMargin.left}, ${ this.dimensions.mainMargin.top })` ); this.createZoom(updaters, eventRect); this.createTooltips(eventRect); this.setInlineStyles(); }, setInlineStyles() { this.svg.selectAll(".hide").attr("fill-opacity", 0); this.svg .selectAll(".line") .attr("clip-path", "url(#hydrocond-clip)") .attr("stroke-width", 2) .attr("fill", "none"); this.svg.selectAll(".line.mean").attr("stroke", "red"); this.svg.selectAll(".line.median").attr("stroke", "black"); this.svg.selectAll(".line.q25").attr("stroke", "orange"); this.svg.selectAll(".line.q75").attr("stroke", "purple"); this.svg .selectAll(".area") .attr("clip-path", "url(#hydrocond-clip)") .attr("stroke", "none") .attr("fill", "lightsteelblue"); this.svg .selectAll(".hdc-line, .ldc-line, .mw-line, .rn-line") .attr("stroke-width", 1) .attr("fill", "none") .attr("clip-path", "url(#hydrocond-clip)"); this.svg.selectAll(".hdc-line").attr("stroke", "red"); this.svg.selectAll(".ldc-line").attr("stroke", "green"); this.svg.selectAll(".mw-line").attr("stroke", "grey"); this.svg.selectAll(".rn-line").attr("stroke", "grey"); this.svg .selectAll(".ref-waterlevel-label") .style("font-size", "10px") .attr("fill", "black"); this.svg .selectAll(".ref-waterlevel-label-background") .attr("fill", "rgba(255, 255, 255, 0.6)"); this.svg .selectAll(".now-line") .attr("stroke", "#999") .attr("stroke-width", 1) .attr("stroke-dasharray", "5, 5") .attr("clip-path", "url(#hydrocond-clip)"); this.svg .selectAll(".now-line-label") .attr("fill", "#999") .style("font-size", "11px"); this.svg .selectAll(".tick line") .attr("stroke-dasharray", 5) .attr("stroke", " #ccc"); this.svg.selectAll(".tick text").attr("fill", "black"); this.svg.selectAll(".domain").attr("stroke", "black"); this.svg .selectAll(".zoom") .attr("cursor", "move") .attr("fill", "none") .attr("pointer-events", "all"); this.svg .selectAll(".brush .selection") .attr("stroke", "none") .attr("fill-opacity", 0.2); this.svg .selectAll(".brush .handle") .attr("stroke", "rgba(23, 162, 184, 0.5)") .attr("fill", "rgba(23, 162, 184, 0.5)"); this.svg .selectAll(".chart-dots") .attr("clip-path", "url(#hydrocond-clip)"); this.svg .selectAll(".chart-dots .chart-dot") .attr("fill", "black") .attr("stroke", "black") .attr("stroke-opacity", 0) .style("pointer-events", "none") .attr("fill-opacity", 0) .transition() .attr("fill-opacity", "0.1s"); this.svg .selectAll(".chart-tooltip") .attr("fill-opacity", 0) .transition() .attr("fill-opacity", "0.3s"); this.svg .selectAll(".chart-tooltip rect") .attr("fill", "#fff") .attr("stroke", "#ccc"); this.svg .selectAll(".chart-tooltip text") .attr("fill", "666") .style("font-size", "0.8em"); }, getDimensions() { // dimensions and margins const svgWidth = document.querySelector("#" + this.containerId) .clientWidth; const svgHeight = document.querySelector("#" + this.containerId) .clientHeight; const mainMargin = { top: 20, right: 20, bottom: 110, left: 80 }; const navMargin = { top: svgHeight - mainMargin.top - 65, right: 20, bottom: 30, left: 80 }; const width = +svgWidth - mainMargin.left - mainMargin.right; const mainHeight = +svgHeight - mainMargin.top - mainMargin.bottom; const navHeight = +svgHeight - navMargin.top - navMargin.bottom; return { width, mainHeight, navHeight, mainMargin, navMargin }; }, getExtent(refWaterLevels) { const waterlevelValues = []; this.longtermWaterlevels.forEach(wl => { waterlevelValues.push(wl.min, wl.max); }); if (refWaterLevels) { waterlevelValues.push( refWaterLevels.HDC + (refWaterLevels.HDC - refWaterLevels.LDC) / 8, Math.max( refWaterLevels.LDC - (refWaterLevels.HDC - refWaterLevels.LDC) / 4, 0 ) ); } else { let delta = d3.max(waterlevelValues) - d3.min(waterlevelValues); waterlevelValues.push( d3.max(waterlevelValues) + delta * 0.1, d3.min(waterlevelValues) - delta * 0.1 ); } return { // set min/max values for the date axis date: [startOfYear(new Date()), endOfYear(new Date())], // set min/max values for the waterlevel axis // including HDC (+ 1/8 HDC-LDC) and LDC (- 1/4 HDC-LDC) waterlevel: d3.extent(waterlevelValues) }; }, getScale() { // scaling helpers to convert real world values into pixels const x = d3.scaleTime().range([0, this.dimensions.width]); const y = d3.scaleLinear().range([this.dimensions.mainHeight, 0]); const x2 = d3.scaleTime().range([0, this.dimensions.width]); const y2 = d3.scaleLinear().range([this.dimensions.navHeight, 0]); // setting the min and max values for the diagram axes x.domain(d3.extent(this.extent.date)); y.domain(this.extent.waterlevel); x2.domain(x.domain()); y2.domain(y.domain()); return { x, y, x2, y2 }; }, getAxes() { return { x: d3 .axisTop(this.scale.x) .tickSizeInner(this.dimensions.mainHeight) .tickSizeOuter(0) .tickFormat(date => { // make the x-axis label formats dynamic, based on zoom // but never display year numbers since they don't make any sense in // this diagram return (d3.timeSecond(date) < date ? d3.timeFormat(".%L") : d3.timeMinute(date) < date ? d3.timeFormat(":%S") : d3.timeHour(date) < date ? d3.timeFormat("%I:%M") : d3.timeDay(date) < date ? d3.timeFormat("%I %p") : d3.timeMonth(date) < date ? d3.timeWeek(date) < date ? d3.timeFormat("%a %d") : d3.timeFormat("%b %d") : d3.timeFormat("%B"))(date); }), y: d3 .axisRight(this.scale.y) .tickSizeInner(this.dimensions.width) .tickSizeOuter(0) .tickFormat(d => this.$options.filters.waterlevel(d)), x2: d3.axisBottom(this.scale.x2) }; }, drawNowLines() { const nowLine = d3 .line() .x(d => this.scale.x(d.x)) .y(d => this.scale.y(d.y)); const nowLabel = selection => { selection.attr( "transform", `translate(${this.scale.x(new Date())}, ${this.scale.y( this.extent.waterlevel[1] - 16 )})` ); }; // draw in main this.diagram .append("path") .datum([ { x: new Date(), y: this.extent.waterlevel[0] }, { x: new Date(), y: this.extent.waterlevel[1] - 20 } ]) .attr("class", "now-line") .attr("d", nowLine); this.diagram // label .append("text") .text(this.$gettext("Now")) .attr("class", "now-line-label") .attr("text-anchor", "middle") .call(nowLabel); // draw in nav this.navigation .append("path") .datum([ { x: new Date(), y: this.extent.waterlevel[0] }, { x: new Date(), y: this.extent.waterlevel[1] - 20 } ]) .attr("class", "now-line") .attr( "d", d3 .line() .x(d => this.scale.x2(d.x)) .y(d => this.scale.y2(d.y)) ); return () => { this.diagram.select(".now-line").attr("d", nowLine); this.diagram.select(".now-line-label").call(nowLabel); }; }, drawAxes() { this.diagram .append("g") .attr("class", "axis--x") .attr("transform", `translate(0, ${this.dimensions.mainHeight})`) .call(this.axes.x) .selectAll(".tick text") .attr("y", 15); this.diagram // label .append("text") .text(this.$gettext("Waterlevel [m]")) .attr("text-anchor", "middle") .attr( "transform", `translate(-45, ${this.dimensions.mainHeight / 2}) rotate(-90)` ); this.diagram .append("g") .call(this.axes.y) .selectAll(".tick text") .attr("x", -25); this.navigation .append("g") .attr("class", "axis axis--x") .attr("transform", `translate(0, ${this.dimensions.navHeight})`) .call(this.axes.x2); return () => { this.diagram .select(".axis--x") .call(this.axes.x) .selectAll(".tick text") .attr("y", 15); }; }, drawWaterlevelMinMaxAreaChart() { const areaChart = isNav => d3 .area() .x(d => this.scale[isNav ? "x2" : "x"](d.date)) .y0(d => this.scale[isNav ? "y2" : "y"](d.min)) .y1(d => this.scale[isNav ? "y2" : "y"](d.max)); this.diagram .append("path") .datum(this.longtermWaterlevels) .attr("class", "area") .attr("d", areaChart()); this.navigation .append("path") .datum(this.longtermWaterlevels) .attr("class", "area") .attr("d", areaChart(true)); return () => { this.diagram.select(".area").attr("d", areaChart()); }; }, drawWaterlevelLineChart(type, data) { const lineChart = type => d3 .line() .x(d => this.scale.x(d.date)) .y(d => this.scale.y(d[type])) .curve(d3.curveLinear); this.diagram .append("path") .attr("class", "line " + type) .datum(data || this.longtermWaterlevels) .attr("d", lineChart(type)); return () => { this.diagram.select(".line." + type).attr("d", lineChart(type)); }; }, drawRefLines(refWaterLevels) { const refWaterlevelLine = d3 .line() .x(d => this.scale.x(d.x)) .y(d => this.scale.y(d.y)); for (let ref in refWaterLevels) { if (refWaterLevels[ref]) { this.diagram .append("path") .datum([ { x: this.extent.date[0], y: refWaterLevels[ref] }, { x: this.extent.date[1], y: refWaterLevels[ref] } ]) .attr("class", ref.toLowerCase() + "-line") .attr("d", refWaterlevelLine); this.diagram // label .append("rect") .attr("class", "ref-waterlevel-label-background") .attr("x", 1) .attr("y", this.scale.y(refWaterLevels[ref]) - 13) .attr("width", 55) .attr("height", 12); this.diagram .append("text") .text( `${ref} (${this.$options.filters.waterlevel( refWaterLevels[ref] )})` ) .attr("class", "ref-waterlevel-label") .attr("x", 5) .attr("y", this.scale.y(refWaterLevels[ref]) - 3); } } }, createZoom(updaters, eventRect) { const brush = d3 .brushX() .handleSize(4) .extent([[0, 0], [this.dimensions.width, this.dimensions.navHeight]]); const zoom = d3 .zoom() .scaleExtent([1, Infinity]) .translateExtent([ [0, 0], [this.dimensions.width, this.dimensions.mainHeight] ]) .extent([[0, 0], [this.dimensions.width, this.dimensions.mainHeight]]); brush.on("brush end", () => { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") return; // ignore brush-by-zoom let s = d3.event.selection || this.scale.x2.range(); this.scale.x.domain(s.map(this.scale.x2.invert, this.scale.x2)); updaters.forEach(u => u && u()); this.setInlineStyles(); this.svg .select(".zoom") .call( zoom.transform, d3.zoomIdentity .scale(this.dimensions.width / (s[1] - s[0])) .translate(-s[0], 0) ); }); zoom.on("zoom", () => { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") return; // ignore zoom-by-brush let t = d3.event.transform; this.scale.x.domain(t.rescaleX(this.scale.x2).domain()); updaters.forEach(u => u && u()); this.setInlineStyles(); this.navigation .select(".brush") .call(brush.move, this.scale.x.range().map(t.invertX, t)); }); zoom.on("start", () => { this.svg.select(".chart-dot").style("opacity", 0); this.svg.select(".chart-tooltip").style("opacity", 0); }); this.navigation .append("g") .attr("class", "brush") .call(brush) .call(brush.move, this.scale.x.range()); eventRect.call(zoom); }, createTooltips(eventRect) { // create clippable container for the dot this.diagram .append("g") .attr("class", "chart-dots") .append("circle") .attr("class", "chart-dot") .attr("r", 4); // create container for the tooltip const tooltip = this.diagram.append("g").attr("class", "chart-tooltip"); tooltip .append("rect") .attr("rx", "0.25em") .attr("ry", "0.25em"); // create container for multiple text rows const tooltipText = tooltip.append("text").attr("text-anchor", "middle"); // padding inside the tooltip box and diagram padding to determine left // and right offset from the diagram boundaries for the tooltip position. const tooltipPadding = 10; const diagramPadding = 5; eventRect .on("mouseover", () => { this.diagram.select(".chart-dot").style("opacity", 1); this.diagram.select(".chart-tooltip").style("opacity", 1); }) .on("mouseout", () => { this.diagram.select(".chart-dot").style("opacity", 0); this.diagram.select(".chart-tooltip").style("opacity", 0); }) .on("mousemove", () => { // find data point closest to mouse const x0 = this.scale.x.invert( d3.mouse(document.getElementById("zoom-hydrocond"))[0] ), i = d3.bisector(d => d.date).left(this.longtermWaterlevels, x0, 1), d0 = this.longtermWaterlevels[i - 1], d1 = this.longtermWaterlevels[i] || d0, d = x0 - d0.date > d1.date - x0 ? d1 : d0; const coords = { x: this.scale.x(d.date), y: this.scale.y(d.median) }; // position the dot this.diagram .select(".chart-dot") .style("opacity", 1) .attr("transform", `translate(${coords.x}, ${coords.y})`); // remove current texts tooltipText.selectAll("tspan").remove(); // write date tooltipText .append("tspan") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text( d.date.toLocaleString([], { year: "2-digit", month: "2-digit", day: "2-digit" }) ); tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "1.4em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`Q75%: ${this.$options.filters.waterlevel(d.q75)} m`); tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "2.6em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`Median: ${this.$options.filters.waterlevel(d.median)} m`); tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "3.8em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`Q25%: ${this.$options.filters.waterlevel(d.q25)} m`); tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "5em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`Max: ${this.$options.filters.waterlevel(d.max)} m`); tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "6.2em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`Min: ${this.$options.filters.waterlevel(d.min)} m`); const dYear = this.yearWaterlevels.find( ywl => ywl.date.getTime() === d.date.getTime() ); if (dYear) { tooltipText .append("tspan") .attr("x", 0) .attr("y", 0) .attr("dy", "7.4em") .attr("dominant-baseline", "hanging") .attr("text-anchor", "middle") .text(`${this.yearCompare}: ${dYear.mean.toFixed(1)} cm`); } // get text dimensions const textBBox = tooltipText.node().getBBox(); this.diagram .selectAll(".chart-tooltip text tspan") .attr("x", textBBox.width / 2 + tooltipPadding) .attr("y", tooltipPadding); // position and scale tooltip box const xMax = this.dimensions.width - (textBBox.width + diagramPadding + tooltipPadding * 2); const tooltipX = Math.max( diagramPadding, Math.min(coords.x - (textBBox.width + tooltipPadding * 2) / 2, xMax) ); let tooltipY = coords.y - (textBBox.height + tooltipPadding * 2) - 10; if (coords.y < textBBox.height + tooltipPadding * 2) { tooltipY = coords.y + 10; } this.diagram .select(".chart-tooltip") .style("opacity", 1) .attr("transform", `translate(${tooltipX}, ${tooltipY})`) .select("rect") .attr("width", textBBox.width + tooltipPadding * 2) .attr("height", textBBox.height + tooltipPadding * 2); }); } }, created() { this.resizeListenerFunction = debounce(this.drawDiagram, 100); window.addEventListener("resize", this.resizeListenerFunction); }, mounted() { // Nasty but necessary if we don't want to use the updated hook to re-draw // the diagram because this would re-draw it also for irrelevant reasons. // In this case we need to wait for the child component (DiagramLegend) to // render. According to the docs (https://vuejs.org/v2/api/#mounted) this // should be possible with $nextTick() but it doesn't work because it does // not guarantee that the DOM is not only updated but also re-painted on the // screen. setTimeout(this.drawDiagram, 150); this.templates[0] = this.defaultTemplate; this.form.template = this.templates[0]; this.templateData = this.form.template; HTTP.get("/templates/diagram", { headers: { "X-Gemma-Auth": localStorage.getItem("token"), "Content-type": "text/xml; charset=UTF-8" } }) .then(response => { if (response.data.length) { this.templates = response.data; this.form.template = this.templates[0]; this.templates[this.templates.length] = this.defaultTemplate; this.applyChange(); } }) .catch(e => { const { status, data } = e.response; displayError({ title: this.$gettext("Backend Error"), message: `${status}: ${data.message || data}` }); }); }, updated() { this.drawDiagram(); }, destroyed() { window.removeEventListener("resize", this.resizeListenerFunction); } }; </script>