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HectorDt/.block

Last active November 9, 2017 19:13
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TP 2 simple line + mouseover
Raw
.block
license: mit
Raw
dataset.json
[{"name": "A", "value": 10, "date": "2016-01"},
{"name": "B", "value": 30, "date": "2016-02"},
{"name": "C", "value": 20, "date": "2016-03"},
{"name": "D", "value": 40, "date": "2016-04"},
{"name": "E", "value": 50, "date": "2016-05"},
{"name": "F", "value": 20, "date": "2016-06"},
{"name": "G", "value": 10, "date": "2016-07"}
]
Raw
index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
.line {
fill: none;
stroke: black;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<script>
var svg = d3.select("body").append("svg")
.attr("width", 960)
.attr("height", 500);
var width = 800;
var height = 400;
// See formats http://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
// Data sample {"name": "G", "value": 10, "date": "2016-07"}
var parseDate = d3.timeParse("%Y-%m");
var displayDate = d3.timeFormat("%b %y");
var displayValue = d3.format(",.0f");
// Ordinal scale
var x = d3.scaleTime()
.range([0, width]);
// Linear scale
var y = d3.scaleLinear()
.range([height, height - 200]);
var line = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.value); });
var g = svg.append("g")
.attr("transform", "translate(50, 0)")
d3.json("dataset.json", function(error, data) {
if (error) throw error;
// Pre-processing
data.forEach(function(d) {
d.value = +d.value;
d["date"] = parseDate(d["date"]);
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
svg.selectAll(".label").data(data).enter()
.append("text")
.attr("class", "label")
.text(function(d, i) { return displayDate(d.date); })
.attr("y", 420)
.attr("x", function(d) { return x(d.date); })
.style("font-size", 10)
.style("font-family", "monospace");
// Display last value
g.selectAll(".value").data([data[data.length -1]]).enter()
.append("text")
.text(function(d, i) { return displayValue(d.value); })
.attr("class", "value")
.attr("y", function(d) { return y(d.value); })
.attr("x", width + 10)
.style("font-size", 20)
.style("font-family", "monospace");
g.selectAll(".line").data([data]).enter().append("path")
.attr("class", "line")
.attr("d", line);
g.selectAll("dot").data(data).enter()
.append("circle")
.style("fill","grey").style("opacity", 0.4)
.attr("r",10)
.attr("cx",function(d){return x(d.date) ;})
.attr("cy",function(d){return y(d.value);})
.on("mouseover",gestionMouseOver)
.on("mouseout",gestionMouseOut)
;
function gestionMouseOver (d,i){
d3.select(this).style("fill","red").style("opacity", 1);
svg.append("text")
.attr("id",function(){return "val" + i;})
.attr("x",function(){return x(d.date)+55;})
.attr("y",function(){return y(d.value)-15;})
.text(function(){return d.value;});
svg.append("line")
.attr("id", function(){return "dash" + i;})
.attr("x1",function(){return x(d.date)+50;})
.attr("y1",function (){return y(d.value);})
.attr("x2",function(){return x(d.date)+50;})
.attr("y2",420)
.attr("stroke-width", 1)
.style("stroke", "black")
.style("stroke-dasharray",("3,3"));
}
function gestionMouseOut (d,i) {
d3.select(this).style("fill","grey").style("opacity", 0.4);
d3.select("#val" + i).remove();
d3.select("#dash" + i).remove();
}
});
</script>
</body>
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