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Dynamic Choropleth
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| license:mit |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Singapore Planning Area</title> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-geo.v1.min.js"></script> | |
| <link rel="stylesheet" type="text/css" href="style.css"> | |
| </head> | |
| <body> | |
| <div id="tooltip" class="hidden"> | |
| <p><span id="value"></p> | |
| </div> | |
| <script> | |
| var margin = {top: 50, right: 30, bottom: 10, left: 30}, | |
| padding = {top: 0, right: 0, bottom: 0, left: 0}, | |
| vizWidth = 960, | |
| vizHeight = 500, | |
| plotWidth = vizWidth - margin.left - margin.right, | |
| plotHeight = vizHeight - margin.top - margin.bottom, | |
| panelWidth = plotWidth - padding.left - padding.right, | |
| panelHeight = plotHeight - padding.top - padding.bottom; | |
| var color = {yellow: "#ffe74c", red: "#ff5964", white:"#ffffff", | |
| green: "#6bf178", blue: "#35a7ff"}; | |
| var viz = d3.select("body").append("svg") | |
| .attr("width", vizWidth) | |
| .attr("height", vizHeight); | |
| // Creating the Slider | |
| var slider = viz.append("g") | |
| .attr("class", "slider") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top / 2 + ")"); | |
| var x = d3.scaleLinear() | |
| .domain([0, 180]) | |
| .range([0, plotWidth]) | |
| .clamp(true); | |
| slider.append("line") | |
| .attr("class", "track") | |
| .attr("x1", x.range()[0]) | |
| .attr("x2", x.range()[1]) | |
| .select(function() { return this.parentNode.appendChild(this.cloneNode(true)); }) | |
| .attr("class", "track-inset") | |
| .select(function() { return this.parentNode.appendChild(this.cloneNode(true)); }) | |
| .attr("class", "track-overlay") | |
| .call(d3.drag() | |
| .on("start.interrupt", function() { slider.interrupt(); }) | |
| .on("start drag", function() { hue(x.invert(d3.event.x)); })); | |
| slider.insert("g", ".track-overlay") | |
| .attr("class", "ticks") | |
| .attr("transform", "translate(0," + 18 + ")") | |
| .selectAll("text") | |
| .data(x.ticks(10)) | |
| .enter().append("text") | |
| .attr("x", x) | |
| .attr("text-anchor", "middle") | |
| .text(function(d) { return d; }); | |
| var handle = slider.insert("circle", ".track-overlay") | |
| .attr("class", "handle") | |
| .attr("r", 9); | |
| slider.transition() // Gratuitous intro! | |
| .duration(750) | |
| .tween("hue", function() { | |
| var i = d3.interpolate(0, 70); | |
| return function(t) { hue(i(t)); }; | |
| }); | |
| function hue(h) { | |
| handle.attr("cx", x(h)); | |
| viz.style("background-color", d3.hsl(h, 0.8, 0.8)); | |
| } | |
| var plot = viz.append("g") | |
| .attr("class","plot") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| var panel = plot.append("g") | |
| .attr("class","panel") | |
| .attr("transform", "translate(" + padding.left + "," + padding.top + ")"); | |
| var div = d3.select("body").append("div") | |
| .attr("class", "tooltip") | |
| .style("display", "none"); | |
| //Important Functions | |
| function drawTooltip(d){ | |
| var xPosition = d3.event.pageX; | |
| var yPosition = d3.event.pageY; | |
| d3.select("#tooltip") | |
| .classed("hidden",false) | |
| .style("left", xPosition + "px") | |
| .style("top", yPosition + "px") | |
| .text(d.properties.PLN_AREA_N); | |
| } | |
| function mouseout() { | |
| d3.select("#tooltip").classed("hidden", true); | |
| d3.select(this).classed("highlight",false) | |
| } | |
| d3.json("sg plan area 20170903.json", function(sg) { | |
| var projection = d3.geoMercator().fitSize([panelWidth,panelHeight],sg), | |
| geoPath = d3.geoPath(projection); | |
| var areas = panel.selectAll("path") | |
| .data(sg.features) | |
| .enter() | |
| .append("path") | |
| .attr("d",geoPath) | |
| .classed("area",true) | |
| .on('mouseover', function(d) { | |
| d3.select(this).classed("highlight",true); | |
| drawTooltip(d);}) | |
| .on('mouseout',mouseout); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| .ticks { | |
| font: 10px sans-serif; | |
| } | |
| .track, | |
| .track-inset, | |
| .track-overlay { | |
| stroke-linecap: round; | |
| } | |
| .track { | |
| stroke: #000; | |
| stroke-opacity: 0.3; | |
| stroke-width: 10px; | |
| } | |
| .track-inset { | |
| stroke: #ddd; | |
| stroke-width: 8px; | |
| } | |
| .track-overlay { | |
| pointer-events: stroke; | |
| stroke-width: 50px; | |
| stroke: transparent; | |
| cursor: crosshair; | |
| } | |
| .handle { | |
| fill: #fff; | |
| stroke: #000; | |
| stroke-opacity: 0.5; | |
| stroke-width: 1.25px; | |
| } | |
| #tooltip { | |
| font-size: 12px; | |
| position: absolute; | |
| width: auto; | |
| height: auto; | |
| padding: 2.5px; | |
| border:1px solid black; | |
| background-color: white; | |
| -webkit-border-radius: 3px; | |
| -moz-border-radius: 3px; | |
| border-radius: 3px; | |
| pointer-events: none; | |
| } | |
| #tooltip.hidden { | |
| display: none; | |
| } | |
| #tooltip p { | |
| margin: 0; | |
| font-family: sans-serif; | |
| font-size: 16px; | |
| line-height: 20px; | |
| } | |
| path.area{ | |
| stroke-width:0.3; | |
| fill: #ffffbf; | |
| stroke: black; | |
| } | |
| path.area.highlight{ | |
| fill:#78c679; | |
| } |
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