This is the code for Chapter 3, Figure 10 from D3.js in Action demonstrating how to use the .classed() function to highlight elements and change font-size by changing the CSS class of an element.
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Ch. 3, Fig. 10 - D3.js in Action
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<html> | |
<head> | |
<title>D3 in Action Chapter 3 - Example 6</title> | |
<meta charset="utf-8" /> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
</head> | |
<style> | |
svg { | |
height: 500px; | |
width: 500px; | |
border: 1px solid gray; | |
} | |
text { | |
font-size: 10px; | |
} | |
g > text.active { | |
font-size: 30px; | |
} | |
circle { | |
fill: pink; | |
stroke: black; | |
stroke-width: 1px; | |
} | |
circle.active { | |
fill: red; | |
} | |
circle.inactive { | |
fill: gray; | |
} | |
.highlight { | |
font-size: 24px; | |
} | |
</style> | |
<body> | |
<div id="controls"></div> | |
<div id="viz"> | |
<svg> | |
</svg> | |
</div> | |
</body> | |
<footer> | |
<script> | |
d3.csv("worldcup.csv", function(data) { | |
overallTeamViz(data); | |
}) | |
function overallTeamViz(incomingData) { | |
d3.select("svg") | |
.append("g") | |
.attr("id", "teamsG") | |
.attr("transform", "translate(50,300)") | |
.selectAll("g") | |
.data(incomingData) | |
.enter() | |
.append("g") | |
.attr("class", "overallG") | |
.attr("transform", function (d,i) {return "translate(" + (i * 50) + ", 0)"}); | |
var teamG = d3.selectAll("g.overallG"); | |
teamG | |
.append("circle") | |
.attr("r", 20); | |
teamG | |
.append("text") | |
.style("text-anchor", "middle") | |
.attr("y", 30) | |
.text(function(d) {return d.team}); | |
var dataKeys = d3.keys(incomingData[0]) | |
.filter(function (el) {return el != "team" && el != "region"}) | |
d3.select("#controls").selectAll("button.teams").data(dataKeys).enter().append("button") | |
.on("click", buttonClick) | |
.html(function(d) {return d}); | |
function buttonClick(datapoint) { | |
var maxValue = d3.max(incomingData, | |
function(d) {return parseFloat(d[datapoint]) | |
}); | |
var radiusScale = d3.scale.linear().domain([0,maxValue]).range([2,20]); | |
d3.selectAll("g.overallG").select("circle").transition().duration(1000).attr("r", function(d) {return radiusScale(d[datapoint])}) | |
} | |
teamG.on("mouseover", highlightRegion); | |
teamG.on("mouseout", unHighlight); | |
function highlightRegion(d,i) { | |
d3.select(this).select("text").attr("y", 10).classed("highlight", true); | |
d3.selectAll("g.overallG") | |
.each(function(p,i) { | |
p.region == d.region ? | |
d3.select(this).select("circle").classed("active",true) : | |
d3.select(this).select("circle").classed("inactive",true) | |
}) | |
this.parentElement.appendChild(this); | |
} | |
function unHighlight() { | |
d3.selectAll("g.overallG").select("circle").classed("active",false).classed("inactive",false); | |
d3.selectAll("g.overallG").select("text").attr("y", 30).classed("highlight", false); | |
} | |
} | |
</script> | |
</footer> | |
</html> |
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team | region | win | loss | draw | points | gf | ga | cs | yc | rc | |
---|---|---|---|---|---|---|---|---|---|---|---|
Netherlands | UEFA | 6 | 0 | 1 | 18 | 12 | 6 | 2 | 23 | 1 | |
Spain | UEFA | 6 | 0 | 1 | 18 | 8 | 2 | 5 | 8 | 0 | |
Germany | UEFA | 5 | 0 | 2 | 15 | 16 | 5 | 3 | 10 | 1 | |
Argentina | CONMEBOL | 4 | 0 | 1 | 12 | 10 | 6 | 2 | 8 | 0 | |
Uruguay | CONMEBOL | 3 | 2 | 2 | 11 | 11 | 8 | 3 | 13 | 2 | |
Brazil | CONMEBOL | 3 | 1 | 1 | 10 | 9 | 4 | 2 | 9 | 2 | |
Ghana | CAF | 2 | 2 | 1 | 8 | 5 | 4 | 1 | 12 | 0 | |
Japan | AFC | 2 | 1 | 1 | 7 | 4 | 2 | 2 | 4 | 0 |
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