adding tooltip
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September 19, 2016 09:34
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Science Comm 16: Bar Chart adding tooltip
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script> | |
| <style> | |
| body { | |
| font: 16px sans-serif; | |
| font-weight: bold; | |
| } | |
| .bar { | |
| fill: steelblue; | |
| } | |
| .bar:hover { | |
| fill: purple; | |
| } | |
| .axis { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, /* path refers to a line */ | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| .title { | |
| font: 20px sans-serif; | |
| font-weight: bold; | |
| } | |
| /* tooltip CSS */ | |
| .d3-tip { | |
| line-height: 1; | |
| font-weight: bold; | |
| padding: 12px; | |
| background: rgba(0, 0, 0, 0.8); | |
| color: #fff; | |
| border-radius: 2px; | |
| } | |
| .d3-tip:after { | |
| box-sizing: border-box; | |
| display: inline; | |
| font-size: 10px; | |
| width: 100%; | |
| line-height: 1; | |
| color: rgba(0, 0, 0, 0.8); | |
| content: "\25BC"; | |
| position: absolute; | |
| text-align: center; | |
| } | |
| /* Style northward tooltips differently */ | |
| .d3-tip.n:after { | |
| margin: -1px 0 0 0; | |
| top: 100%; | |
| left: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var margin = { | |
| top: 30, | |
| left: 65, | |
| right: 20, | |
| bottom: 50 | |
| } | |
| height = 400 - margin.top - margin.bottom | |
| width = 600 - margin.left - margin.right | |
| var svg = d3.select("body").append("svg") | |
| .attr("height", height + margin.top + margin.bottom) | |
| .attr("width", width + margin.left + margin.right) | |
| .append("g") //investigate the effects of removing this | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| //xAxis | |
| var xScale = d3.scale.ordinal() | |
| .rangeRoundBands([width,0], .1); | |
| var xAxis = d3.svg.axis() | |
| .scale(xScale) | |
| .orient("bottom"); | |
| var yScale = d3.scale.linear() | |
| .range([height,0]) | |
| var yAxis = d3.svg.axis() | |
| .scale(yScale) | |
| .orient("left"); | |
| var tip = d3.tip() | |
| .attr("class","d3-tip") | |
| .html(function (d) { | |
| return "<strong>Transit trade:</strong> <span style='color:red'>" + d.ttrade + "</span>"; | |
| }); | |
| svg.call(tip); | |
| d3.csv("ttrade.csv",type, function(data) { | |
| xScale.domain(data.map(function(d) {return d.year;})); | |
| yScale.domain([0, d3.max(data, function(d) { return +d.ttrade; } )]); //or use yScale.domain([0, 20000]); | |
| //xAxis | |
| svg.append("g") | |
| .attr("class","x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis) | |
| .selectAll("text") | |
| .style("text-anchor", "end") | |
| .attr("dx", "-.8em") | |
| .attr("dy", ".15em") | |
| .attr("transform", "rotate(-35)"); | |
| //yAxis | |
| svg.append("g") | |
| .attr("class","y axis") | |
| .call(yAxis); | |
| //x axis label | |
| svg.append("text") | |
| .attr("x", width/2) | |
| .attr("y", height + margin.bottom) | |
| .text("Year"); | |
| //y axis label | |
| svg.append("text") | |
| .attr("transform", "rotate(-90)") | |
| //NOTE - we actually rotate our reference point by 90 degrees | |
| //http://www.d3noob.org/2012/12/adding-axis-labels-to-d3js-graph.html gives more detail | |
| .attr("y", 0 - margin.left) | |
| .attr("x",0 - (height / 2)) | |
| .attr("dy", "1em") | |
| .style("text-anchor", "middle") | |
| .text("Revenue in Mio. CHF"); | |
| //title | |
| svg.append("g") | |
| .attr("class","title") | |
| .append("text") | |
| .attr("x", width/2) | |
| .attr("y", (margin.top / 2)) | |
| .attr("text-anchor", "middle") | |
| .text("Commodity transit trade") | |
| svg.selectAll(".bar") | |
| .data(data) | |
| .enter() | |
| .append("rect") | |
| .attr("class", "bar") | |
| .attr("x", function(d) {return xScale(d.year);}) | |
| .attr("y", function(d) {return yScale(d.ttrade); }) | |
| .attr("width",xScale.rangeBand()) | |
| .attr("height", function (d) {return height - yScale(d.ttrade); }) | |
| //show and hide tooltip | |
| .on("mouseover", tip.show) | |
| .on("mouseout", tip.hide) ; | |
| }); | |
| function type(d) { | |
| d.ttrade = d.ttrade; | |
| return d; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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| year | ttrade | |
|---|---|---|
| 2011 | 19766 | |
| 2010 | 19827 | |
| 2009 | 14422 | |
| 2008 | 14445 | |
| 2007 | 10716 | |
| 2006 | 8811 | |
| 2005 | 5862 | |
| 2004 | 4552 | |
| 2003 | 2444 |
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