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@alandunning
Last active Oct 19, 2016
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Bar Chart with Tooltip with Tooltip D3 V4
license: gpl-3.0
[
{"area" : "regional", "value": 190000},
{"area" : "national", "value": 250000}
]
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
background-color: #F1F3F3
}
.axis {
font: 15px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #D4D8DA;
stroke-width: 1px;
shape-rendering: crispEdges;
}
.toolTip {
position: absolute;
display: none;
min-width: 80px;
height: auto;
background: none repeat scroll 0 0 #ffffff;
border: 1px solid #6F257F;
padding: 14px;
text-align: center;
}
</style>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
margin = {top: 20, right: 20, bottom: 30, left: 50},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
var tooltip = d3.select("body").append("div").attr("class", "toolTip");
var x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
y = d3.scaleLinear().rangeRound([height, 0]);
var colours = d3.scaleOrdinal()
.range(["#6F257F", "#CA0D59"]);
var g = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json("data.json", function(error, data) {
if (error) throw error;
x.domain(data.map(function(d) { return d.area; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
g.append("g")
.attr("class", "axis axis--y")
.call(d3.axisLeft(y).ticks(5).tickFormat(function(d) { return parseInt(d / 1000) + "K"; }).tickSizeInner([-width]))
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.attr("fill", "#5D6971")
.text("Average House Price - (£)");
g.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("x", function(d) { return x(d.area); })
.attr("y", function(d) { return y(d.value); })
.attr("width", x.bandwidth())
.attr("height", function(d) { return height - y(d.value); })
.attr("fill", function(d) { return colours(d.area); })
.on("mousemove", function(d){
tooltip
.style("left", d3.event.pageX - 50 + "px")
.style("top", d3.event.pageY - 70 + "px")
.style("display", "inline-block")
.html((d.area) + "<br>" + "£" + (d.value));
})
.on("mouseout", function(d){ tooltip.style("display", "none");});
});
</script>
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