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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<script data-require="[email protected]" data-semver="3.5.3" src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<script>
var myData = "date \t New York \t San Francisco \t Austin\n\
20111001 \t 63.4 \t 62.7 \t 72.2\n\
20111002 \t 58.0 \t 59.9 \t 67.7\n\
20111003 \t 53.3 \t 59.1 \t 69.4\n\
20111004 \t 55.7 \t 58.8 \t 68.0\n\
20111005 \t 64.2 \t 58.7 \t 72.4\n\
20111006 \t 58.8 \t 57.0 \t 77.0\n\
20111007 \t 57.9 \t 56.7 \t 82.3\n\
20111008 \t 61.8 \t 56.8 \t 78.9\n\
20111009 \t 69.3 \t 56.7 \t 68.8\n\
20111010 \t 71.2 \t 60.1 \t 68.7\n\
20111011 \t 68.7 \t 61.1 \t 70.3\n\
20111012 \t 61.8 \t 61.5 \t 75.3\n\
20111013 \t 63.0 \t 64.3 \t 76.6\n\
20111014 \t 66.9 \t 67.1 \t 66.6\n\
20111015 \t 61.7 \t 64.6 \t 68.0\n\
20111016 \t 61.8 \t 61.6 \t 70.6\n\
20111017 \t 62.8 \t 61.1 \t 71.1\n\
20111018 \t 60.8 \t 59.2 \t 70.0\n\
20111019 \t 62.1 \t 58.9 \t 61.6\n\
20111020 \t 65.1 \t 57.2 \t 57.4\n\
20111021 \t 55.6 \t 56.4 \t 64.3\n\
20111022 \t 54.4 \t 60.7 \t 72.4\n";
var margin = {
top: 20,
right: 80,
bottom: 30,
left: 50
},
width = 500 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%Y%m%d").parse;
var x = d3.time.scale()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.category20();
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line = d3.svg.line()
.interpolate("basis")
.x(function(d) {
return x(d.date);
})
.y(function(d) {
return y(d.temperature);
});
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var data = d3.tsv.parse(myData);
color.domain(d3.keys(data[0]).filter(function(key) {
return key !== "date";
}));
data.forEach(function(d) {
d.date = parseDate(d.date);
});
var cities = color.domain().map(function(name) {
return {
name: name,
values: data.map(function(d) {
return {
date: d.date,
temperature: +d[name]
};
})
};
});
x.domain(d3.extent(data, function(d) {
return d.date;
}));
y.domain([
d3.min(cities, function(c) {
return d3.min(c.values, function(v) {
return v.temperature;
});
}),
d3.max(cities, function(c) {
return d3.max(c.values, function(v) {
return v.temperature;
});
})
]);
var legend = svg.selectAll('g')
.data(cities)
.enter()
.append('g')
.attr('class', 'legend');
legend.append('rect')
.attr('x', width - 20)
.attr('y', function(d, i) {
return i * 20;
})
.attr('width', 10)
.attr('height', 10)
.style('fill', function(d) {
return color(d.name);
});
legend.append('text')
.attr('x', width - 8)
.attr('y', function(d, i) {
return (i * 20) + 9;
})
.text(function(d) {
return d.name;
});
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Temperature (ºF)");
var city = svg.selectAll(".city")
.data(cities)
.enter().append("g")
.attr("class", "city");
city.append("path")
.attr("class", "line")
.attr("d", function(d) {
return line(d.values);
})
.style("stroke", function(d) {
return color(d.name);
});
city.append("text")
.datum(function(d) {
return {
name: d.name,
value: d.values[d.values.length - 1]
};
})
.attr("transform", function(d) {
return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")";
})
.attr("x", 3)
.attr("dy", ".35em")
.text(function(d) {
return d.name;
});
// **************************************************************************************** //
var mouseG = svg.append("g")
.attr("class", "mouse-over-effects");
mouseG.append("path") // this is the black vertical line to follow mouse
.attr("class", "mouse-line")
.style("stroke", "black")
.style("stroke-width", "1px")
.style("opacity", "0");
var lines = document.getElementsByClassName('line');
var mousePerLine = mouseG.selectAll('.mouse-per-line')
.data([cities])
.enter()
.append("g")
.attr("class", "mouse-per-line");
mousePerLine.selectAll('.mouse-per-line') // Rectangle
.data([cities])
.enter()
.append("rect")
.attr("width", width)
.attr("height", 90)
.style("padding", "5px")
.style("stroke", "#272525")
.style("fill", "#272525")
.style("stroke-width", "1px")
.style("opacity", "0")
.attr('x', 10)
.attr('y', -45);
mousePerLine.selectAll('.mouse-per-line') // Circle
.data(cities)
.enter()
.append("circle")
.attr("r", 5)
.style("stroke", function(d) {
return color(d.name);
})
.style("fill", function(d) {
return color(d.name);
})
.style("stroke-width", "1px")
.style("opacity", "0");
mousePerLine.selectAll('.mouse-per-line') // Text
.data(cities)
.enter()
.append("text")
.attr("transform", "translate(15,13)")
.style("fill", function(d) {
return color(d.name);
})
.style("font-weight", "bold")
.style("font-size", "10pt");
mouseG.append('svg:rect') // append a rect to catch mouse movements on canvas
.attr('width', width) // can't catch mouse events on a g element
.attr('height', height)
.attr('fill', 'none')
.attr('pointer-events', 'all')
.on('mouseout', function() { // on mouse out hide line, circles and text
d3.select(".mouse-line")
.style("opacity", "0");
d3.selectAll(".mouse-per-line rect")
.style("opacity", "0");
d3.selectAll(".mouse-per-line circle")
.style("opacity", "0");
d3.selectAll(".mouse-per-line text")
.style("opacity", "0");
})
.on('mouseover', function() { // on mouse in show line, circles and text
d3.select(".mouse-line")
.style("opacity", "1");
d3.selectAll(".mouse-per-line rect")
.style("opacity", "1");
d3.selectAll(".mouse-per-line circle")
.style("opacity", "1");
d3.selectAll(".mouse-per-line text")
.style("opacity", "1");
})
// **************************************************************************************** //
.on('mousemove', function() { // mouse moving over canvas
var mouse = d3.mouse(this);
d3.select(".mouse-line")
.attr("d", function() {
var d = "M" + mouse[0] + "," + height;
d += " " + mouse[0] + "," + 0;
return d;
});
d3.selectAll(".mouse-per-line")
.attr("foo", function(d, i) {
var xDate = x.invert(mouse[0]);
var bisect;
var heights = [];
var xDateValue = /\w*.\s.\d.\d*.\d*.:\d*.:\d*/.exec(xDate);
// console.log(xDateValue);
d3.selectAll('circle')
.attr("transform", function(d, j) {
bisect = d3.bisector(function(d) {
return d.date;
}).right;
idx = bisect(d.values, xDate);
var beginning = 0,
end = lines[i].getTotalLength(),
target = null;
while (true) {
target = Math.floor((beginning + end)/2);
pos = lines[j].getPointAtLength(target);
if ((target === end || target === beginning) && pos.x !== mouse[0]) {
break;
}
if (pos.x > mouse[0]) end = target;
else if (pos.x < mouse[0]) beginning = target;
else break; //position found
}
heights[j] = pos.y;
return "translate(" + mouse[0] + "," + pos.y + ")";
});
var avgheight = 0;
for (var z = 0; z < heights.length; z++) {
avgheight = avgheight + heights[z];
}
avgheight = avgheight/d.length;
d3.select(this).selectAll('rect')
.attr("transform", function(d, i) {
return "translate(" + mouse[0] + "," + avgheight + ")";
});
var rectangleText = "";
for (var t = 1; t < heights.length; t++) {
rectangleText = rectangleText + "<br/>" + y.invert(heights[t]).toFixed(2);
}
d3.select(this)
.selectAll('text').text(function(d, i) {
return xDateValue + " " + d.name + " " + y.invert(heights[i]).toFixed(2)
}).attr("transform", function(d, i) {
return "translate(" + mouse[0] + "," + (avgheight + 30 - (i * 25)) + ")";
}).attr("dx", '20px');
return "translate(" + mouse[0] + "," + pos.y + ")";
});
});
</script>
</body>
</html>
你好，请帮助我。我被卡住了。 – Rach