Mercurial > gemma
view client/src/components/gauge/Waterlevel.vue @ 2691:023a607c4bcc
client: waterlevel diagram: fixed tooltip display while moving/zooming the chart
and added fade animation
author | Markus Kottlaender <markus@intevation.de> |
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date | Fri, 15 Mar 2019 16:59:15 +0100 |
parents | 8f919fe629f9 |
children | 04b082a86d50 |
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<template> <div class="flex-fill diagram-container"></div> </template> <style lang="sass" scoped> .diagram-container /deep/ .main .line clip-path: url(#clip) .nav .line stroke: steelblue stroke-width: 2 fill: transparent clip-path: url(#clip) .hdc-line, .ldc-line, .mw-line stroke-width: 1 fill: transparent clip-path: url(#clip) .hdc-line stroke: red .ldc-line stroke: green .mw-line stroke: grey .ref-waterlevel-label font-size: 11px fill: #999 .hdc-ldc-area fill: rgba(0, 255, 0, 0.15) .tick line stroke-dasharray: 5 stroke: #ccc .zoom cursor: move fill: none pointer-events: all .brush .selection stroke: transparent fill-opacity: 0.2 .handle stroke: rgba($color-info, 0.5) fill: rgba($color-info, 0.5) .chart-dots clip-path: url(#clip) .chart-dot fill: steelblue stroke: steelblue pointer-events: none transition: opacity 0.1s .chart-tooltip transition: opacity 0.3s rect fill: #fff stroke: #ccc text fill: #666 font-size: 12px </style> <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) 2018 by via donau * – Österreichische Wasserstraßen-Gesellschaft mbH * Software engineering by Intevation GmbH * * Author(s): * Markus Kottländer <markus.kottlaender@intevation.de> */ import { mapState, mapGetters } from "vuex"; import * as d3Base from "d3"; import { lineChunked } from "d3-line-chunked"; import debounce from "debounce"; // we should load only d3 modules we need but for now we'll go with the lazy way // https://www.giacomodebidda.com/how-to-import-d3-plugins-with-webpack/ const d3 = Object.assign(d3Base, { lineChunked }); export default { computed: { ...mapState("gauges", ["waterlevels"]), ...mapGetters("gauges", ["selectedGauge"]) }, watch: { waterlevels() { this.drawDiagram(); } }, methods: { drawDiagram() { if (!this.selectedGauge || !this.waterlevels.length) return; // remove old diagram d3.select(".diagram-container svg").remove(); // get HDC/LDC/MW of the gauge let refWaterLevels = JSON.parse( this.selectedGauge.properties.reference_water_levels ); // CREATE SVG AND SET DIMENSIONS/MARGINS let svgWidth = document.querySelector(".diagram-container").clientWidth; let svgHeight = document.querySelector(".diagram-container").clientHeight; let svg = d3 .select(".diagram-container") .append("svg") .attr("width", "100%") .attr("height", "100%"); let mainMargin = { top: 20, right: 20, bottom: 110, left: 80 }, navMargin = { top: svgHeight - mainMargin.top - 65, right: 20, bottom: 30, left: 80 }, width = +svgWidth - mainMargin.left - mainMargin.right, mainHeight = +svgHeight - mainMargin.top - mainMargin.bottom, navHeight = +svgHeight - navMargin.top - navMargin.bottom; // PREPARING AXES/SCALING // scaling helpers to convert real values to pixels // based on the diagrams dimensions let x = d3.scaleTime().range([0, width]), x2 = d3.scaleTime().range([0, width]), y = d3.scaleLinear().range([mainHeight, 0]), y2 = d3.scaleLinear().range([navHeight, 0]); // find min/max values for the waterlevel axis // including hdc/ldc (+/- 100 cm) let WaterlevelMinMax = d3.extent( [ ...this.waterlevels, { waterlevel: refWaterLevels.HDC + 100 }, { waterlevel: Math.max(refWaterLevels.LDC - 100, 0) } ], d => d.waterlevel ); // setting the min and max values for the diagram axes x.domain(d3.extent(this.waterlevels, d => d.date)); y.domain(WaterlevelMinMax); x2.domain(x.domain()); y2.domain(y.domain()); // creating the axes based on these scales let xAxis = d3 .axisTop(x) .tickSizeInner(mainHeight) .tickSizeOuter(0); let xAxis2 = d3.axisBottom(x2); let yAxis = d3 .axisRight(y) .tickSizeInner(width) .tickSizeOuter(0); // PREPARING CHART FUNCTIONS // waterlevel line in big chart // d3-line-chunked plugin: https://github.com/pbeshai/d3-line-chunked var mainLineChart = d3 .lineChunked() .x(d => x(d.date)) .y(d => y(d.waterlevel)) .curve(d3.curveLinear) .isNext((prev, current) => { // points are "next to each other" when they are exactly 15 minutes apart return current.date - prev.date === 15 * 60 * 1000; }) .lineStyles({ stroke: "steelblue" }) .gapStyles({ stroke: "steelblue", "stroke-opacity": 1, "stroke-dasharray": "3 3", "stroke-width": 1 }); // waterlevel line in small chart let navLineChart = d3 .line() .curve(d3.curveMonotoneX) .x(d => x2(d.date)) .y(d => y2(d.waterlevel)); // hdc/ldc/mw let refWaterlevelLine = d3 .line() .x(d => x(d.x)) .y(d => y(d.y)); // DRAWING MAINCHART // define visible chart area // everything outside this area will be hidden (clipped) svg .append("defs") .append("clipPath") .attr("id", "clip") .append("rect") .attr("width", width) .attr("height", mainHeight); let mainChart = svg .append("g") .attr("class", "main") .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`); // axes mainChart .append("g") .attr("class", "axis--x") .attr("transform", `translate(0, ${mainHeight})`) .call(xAxis) .selectAll(".tick text") .attr("y", 15); mainChart // label .append("text") .text(this.$gettext("Waterlevel [cm]")) .attr("text-anchor", "middle") .attr("transform", `translate(-45, ${mainHeight / 2}) rotate(-90)`); mainChart .append("g") .call(yAxis) .selectAll(".tick text") .attr("x", -25); // reference waterlevels // filling area between HDC and LDC mainChart .append("rect") .attr("class", "hdc-ldc-area") .attr("x", 0) .attr("y", y(refWaterLevels.HDC)) .attr("width", width) .attr("height", y(refWaterLevels.LDC) - y(refWaterLevels.HDC)); let lastDate = this.waterlevels[this.waterlevels.length - 1].date; // HDC mainChart .append("path") .datum([ { x: 0, y: refWaterLevels.HDC }, { x: lastDate, y: refWaterLevels.HDC } ]) .attr("class", "hdc-line") .attr("d", refWaterlevelLine); mainChart // label .append("text") .text("HDC") .attr("class", "ref-waterlevel-label") .attr("x", x(lastDate) - 20) .attr("y", y(refWaterLevels.HDC) - 3); // LDC mainChart .append("path") .datum([ { x: 0, y: refWaterLevels.LDC }, { x: lastDate, y: refWaterLevels.LDC } ]) .attr("class", "ldc-line") .attr("d", refWaterlevelLine); mainChart // label .append("text") .text("LDC") .attr("class", "ref-waterlevel-label") .attr("x", x(lastDate) - 20) .attr("y", y(refWaterLevels.LDC) - 3); // MW mainChart .append("path") .datum([ { x: 0, y: refWaterLevels.MW }, { x: lastDate, y: refWaterLevels.MW } ]) .attr("class", "mw-line") .attr("d", refWaterlevelLine); mainChart // label .append("text") .text("MW") .attr("class", "ref-waterlevel-label") .attr("x", x(lastDate) - 20) .attr("y", y(refWaterLevels.MW) - 3); // waterlevel chart mainChart .append("g") .attr("class", "line") .datum(this.waterlevels) .transition() .duration(1000) .call(mainLineChart); // DRAWING NAVCHART let navChart = svg .append("g") .attr("class", "nav") .attr("transform", `translate(${navMargin.left}, ${navMargin.top})`); // axis (nav chart only has y-axis) navChart .append("g") .attr("class", "axis axis--x") .attr("transform", `translate(0, ${navHeight})`) .call(xAxis2); // waterlevel chart navChart .append("path") .datum(this.waterlevels) .attr("class", "line") .attr("d", navLineChart); // INTERACTIVITY // selecting time period in nav chart let brush = d3 .brushX() .handleSize(4) .extent([[0, 0], [width, navHeight]]) .on("brush end", () => { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") return; // ignore brush-by-zoom let s = d3.event.selection || x2.range(); x.domain(s.map(x2.invert, x2)); mainChart.select(".line").call(mainLineChart); mainChart .select(".axis--x") .call(xAxis) .selectAll(".tick text") .attr("y", 15); svg .select(".zoom") .call( zoom.transform, d3.zoomIdentity.scale(width / (s[1] - s[0])).translate(-s[0], 0) ); }); // zooming with mousewheel in main chart let zoom = d3 .zoom() .scaleExtent([1, Infinity]) .translateExtent([[0, 0], [width, mainHeight]]) .extent([[0, 0], [width, mainHeight]]) .on("zoom", () => { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") return; // ignore zoom-by-brush let t = d3.event.transform; x.domain(t.rescaleX(x2).domain()); mainChart.select(".line").call(mainLineChart); mainChart .select(".axis--x") .call(xAxis) .selectAll(".tick text") .attr("y", 15); navChart .select(".brush") .call(brush.move, x.range().map(t.invertX, t)); }) .on("start", () => { svg.select(".chart-dot").style("opacity", 0); svg.select(".chart-tooltip").style("opacity", 0); }); navChart .append("g") .attr("class", "brush") .call(brush) .call(brush.move, x.range()); let zoomRect = svg .append("rect") .attr("class", "zoom") .attr("width", width) .attr("height", mainHeight) .attr("transform", `translate(${mainMargin.left}, ${mainMargin.top})`) .call(zoom); // TOOLTIPS let dots = mainChart.append("g").attr("class", "chart-dots"); dots .append("circle") .attr("class", "chart-dot") .attr("r", 4); let tooltips = mainChart.append("g").attr("class", "chart-tooltip"); tooltips .append("rect") .attr("x", -25) .attr("y", -25) .attr("rx", 4) .attr("ry", 4) .attr("width", 105) .attr("height", 40); let tooltipText = tooltips.append("text"); tooltipText .append("tspan") .attr("x", -15) .attr("y", -8); tooltipText .append("tspan") .attr("x", 8) .attr("y", 8) .style("font-weight", "bold"); let bisectDate = d3.bisector(d => d.date).left; zoomRect .on("mouseover", () => { svg.select(".chart-dot").style("opacity", 1); svg.select(".chart-tooltip").style("opacity", 1); }) .on("mouseout", () => { svg.select(".chart-dot").style("opacity", 0); svg.select(".chart-tooltip").style("opacity", 0); }) .on("mousemove", () => { let x0 = x.invert(d3.mouse(document.querySelector(".zoom"))[0]), i = bisectDate(this.waterlevels, x0, 1), d0 = this.waterlevels[i - 1], d1 = this.waterlevels[i], d = x0 - d0.date > d1.date - x0 ? d1 : d0; svg .select(".chart-dot") .style("opacity", 1) .attr("transform", `translate(${x(d.date)}, ${y(d.waterlevel)})`); svg .select(".chart-tooltip") .style("opacity", 1) .attr( "transform", `translate(${x(d.date) - 25}, ${y(d.waterlevel) - 25})` ); svg.select(".chart-tooltip text tspan:first-child").text( d.date.toLocaleString([], { year: "2-digit", month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit" }) ); svg .select(".chart-tooltip text tspan:last-child") .text(d.waterlevel + " cm"); }); } }, created() { window.addEventListener("resize", debounce(this.drawDiagram), 100); }, mounted() { this.drawDiagram(); }, updated() { this.drawDiagram(); } }; </script>