【发布时间】：2015-11-01 13:41:11
【问题描述】：
我正在尝试一个简单的饼图，其中切片内有标签。我可以显示标签，但不是全部。例如在示例代码中，我有 Rick 5%、Paul 4% 和 Steve 3% 没有显示，因为切片的尺寸很小。我该如何克服这个问题？
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>Testing Pie Chart</title>
<!--<script type="text/javascript" src="d3/d3.v2.js"></script>-->
<script src="../js/d3.min.js" type="text/javascript"></script>
<style type="text/css">
#pieChart {
position:absolute;
top:10px;
left:10px;
width:400px;
height: 400px;
}
#lineChart {
position:absolute;
top:10px;
left:410px;
height: 150px;
}
#barChart {
position:absolute;
top:160px;
left:410px;
height: 250px;
}
.slice {
font-size: 8pt;
font-family: Verdana;
fill: white; //svg specific - instead of color
font-weight: normal ;
}
/*for line chart*/
.axis path, .axis line {
fill: none;
stroke: black;
shape-rendering: crispEdges; //The shape-rendering property is an SVG attribute, used here to make sure our axis and its tick mark lines are pixel-perfect.
}
.line {
fill: none;
/*stroke: steelblue;*/
stroke-width: 3px;
}
.dot {
/*fill: white;*/
/*stroke: steelblue;*/
stroke-width: 1.5px;
}
.axis text {
font-family: Verdana;
font-size: 11px;
}
.title {
font-family: Verdana;
font-size: 15px;
}
.xAxis {
font-family: verdana;
font-size: 11px;
fill: black;
}
.yAxis {
font-family: verdana;
font-size: 11px;
fill: white;
}
table {
border-collapse:collapse;
border: 0px;
font-family: Verdana;
color: #5C5558;
font-size: 12px;
text-align: right;
}
td {
padding-left: 10px;
}
#lineChartTitle1 {
font-family: Verdana;
font-size : 14px;
fill : lightgrey;
font-weight: bold;
text-anchor: middle;
}
#lineChartTitle2 {
font-family: Verdana;
font-size : 72px;
fill : grey;
text-anchor: middle;
font-weight: bold;
/*font-style: italic;*/
}
</style>
</head>
<body>
var formatAsPercentage = d3.format("%"),
formatAsPercentage1Dec = d3.format(".1%"),
formatAsInteger = d3.format(","),
fsec = d3.time.format("%S s"),
fmin = d3.time.format("%M m"),
fhou = d3.time.format("%H h"),
fwee = d3.time.format("%a"),
fdat = d3.time.format("%d d"),
fmon = d3.time.format("%b")
;
function dsPieChart() {
var dataset = [
{category: "Tom", measure: 0.30},
{category: "John", measure: 0.30},
{category: "Martin", measure: 0.30},
{category: "Sam", measure: 0.30},
{category: "Peter", measure: 0.25},
{category: "Johannes", measure: 0.15},
{category: "Rick", measure: 0.05},
{category: "Lenny", measure: 0.18},
{category: "Paul", measure: 0.04},
{category: "Steve", measure: 0.03}
]
;
var width = 400,
height = 400,
outerRadius = Math.min(width, height) / 2,
innerRadius = outerRadius * .999,
// for animation
innerRadiusFinal = outerRadius * .5,
innerRadiusFinal3 = outerRadius * .45,
color = d3.scale.category20() //builtin range of colors
;
var vis = d3.select("#pieChart")
.append("svg:svg")
.data([dataset])
.attr("width", width)
.attr("height", height)
.append("svg:g")
.attr("transform", "translate(" + outerRadius + "," + outerRadius + ")")
;
var arc = d3.svg.arc()
.outerRadius(outerRadius).innerRadius(innerRadius);
// for animation
var arcFinal = d3.svg.arc().innerRadius(innerRadiusFinal).outerRadius(outerRadius);
var arcFinal3 = d3.svg.arc().innerRadius(innerRadiusFinal3).outerRadius(outerRadius);
var pie = d3.layout.pie()
.value(function (d) {
return d.measure;
});
var arcs = vis.selectAll("g.slice")
.data(pie)
.enter()
.append("svg:g")
.attr("class", "slice")
.on("mouseover", mouseover)
.on("mouseout", mouseout)
.on("click", up)
;
arcs.append("svg:path")
.attr("fill", function (d, i) {
return color(i);
})
.attr("d", arc)
.append("svg:title")
.text(function (d) {
return d.data.category + ": " + formatAsPercentage(d.data.measure);
});
d3.selectAll("g.slice").selectAll("path").transition()
.duration(750)
.delay(10)
.attr("d", arcFinal)
;
arcs.filter(function (d) {
return d.endAngle - d.startAngle > .2;
})
.append("svg:text")
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.attr("transform", function (d) {
return "translate(" + arcFinal.centroid(d) + ")rotate(" + angle(d) + ")";
})
.text(function (d) {
return d.data.category;
})
;
function angle(d) {
var a = (d.startAngle + d.endAngle) * 90 / Math.PI - 90;
return a > 90 ? a - 180 : a;
}
// Pie chart title
vis.append("svg:text")
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text("Revenue Share 2012")
.attr("class", "title")
;
function mouseover() {
d3.select(this).select("path").transition()
.duration(750)
//.attr("stroke","red")
//.attr("stroke-width", 1.5)
.attr("d", arcFinal3)
;
}
function mouseout() {
d3.select(this).select("path").transition()
.duration(750)
//.attr("stroke","blue")
//.attr("stroke-width", 1.5)
.attr("d", arcFinal)
;
}
function up(d, i) {
updateBarChart(d.data.category, color(i));
updateLineChart(d.data.category, color(i));
}
}
dsPieChart();
</script>
</body>
【问题讨论】：
-
看这篇文章可能会有所帮助：stackoverflow.com/questions/21939977/…
标签： javascript d3.js