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javascript - 如何在 d3 饼图中添加漂亮的图例

转载 作者:行者123 更新时间:2023-12-04 17:46:39 25 4
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我的饼图工作正常,但我想添加一个像这样的漂亮图例(用 mspaint 制作)

enter image description here

但不能让它工作......

这是我的饼图代码(没有图例部分):

<!DOCTYPE html>
<html>

<head>
<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
</head>

<body>
<script>
var newData = [{
count: 1,
emote: "OneTwoThree"
}, {
count: 1,
emote: "FourFiveSix"
}, {
count: 1,
emote: "SevenEightNine"
}, {
count: 15,
emote: "TenElevenTwelve"
},

]

// Define size & radius of donut pie chart
var width = 450,
height = 800,
radius = Math.min(width, height) / 2;

// Define arc colours
var colour = d3.scale.category20();

// Define arc ranges
var arcText = d3.scale.ordinal()
.rangeRoundBands([0, width], .1, .3);

// Determine size of arcs
var arc = d3.svg.arc()
.innerRadius(radius - 130)
.outerRadius(radius - 10);

// Create the donut pie chart layout
var pie = d3.layout.pie()
.value(function(d) {
return d.count;
})
.sort(null);

// Append SVG attributes and append g to the SVG
var mySvg = d3.select('body').append("svg")
.attr("width", width)
.attr("height", height);

var svg = mySvg
.append("g")
.attr("transform", "translate(" + radius + "," + radius + ")");

var svgText = mySvg
.append("g")
.attr("transform", "translate(" + radius + "," + radius + ")");

// Define inner circle
svg.append("circle")
.attr("cx", 0)
.attr("cy", 0)
.attr("r", 100)
.attr("fill", "#fff");

// Calculate SVG paths and fill in the colours
var g = svg.selectAll(".arc")
.data(pie(newData))
.enter().append("g")
.attr("class", "arc");

// Append the path to each g
g.append("path")
.attr("d", arc)
//.attr("data-legend", function(d, i){ return parseInt(newData[i].count) + ' ' + newData[i].emote; })
.attr("fill", function(d, i) {
return colour(i);
});

var textG = svg.selectAll(".labels")
.data(pie(newData))
.enter().append("g")
.attr("class", "labels");

// Append text labels to each arc
textG.append("text")
.attr("transform", function(d) {
return "translate(" + arc.centroid(d) + ")";
})
.attr("dy", ".35em")
.style("text-anchor", "middle")
.attr("fill", "#fff")
.text(function(d, i) {
return d.data.count > 0 ? d.data.emote : '';
});
</script>
</body>

</html>

最佳答案

我很惊讶没有更多的这种“股票”例子。

这是一个与您的数据看起来不错的快速图例:

// again rebind for legend
var legendG = mySvg.selectAll(".legend") // note appending it to mySvg and not svg to make positioning easier
.data(pie(newData))
.enter().append("g")
.attr("transform", function(d,i){
return "translate(" + (width - 110) + "," + (i * 15 + 20) + ")"; // place each legend on the right and bump each one down 15 pixels
})
.attr("class", "legend");

legendG.append("rect") // make a matching color rect
.attr("width", 10)
.attr("height", 10)
.attr("fill", function(d, i) {
return colour(i);
});

legendG.append("text") // add the text
.text(function(d){
return d.value + " " + d.data.emote;
})
.style("font-size", 12)
.attr("y", 10)
.attr("x", 11);

完整示例:

<!DOCTYPE html>
<html>

<head>
<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
</head>

<body>
<script>
var newData = [{
count: 1,
emote: "OneTwoThree"
}, {
count: 1,
emote: "FourFiveSix"
}, {
count: 1,
emote: "SevenEightNine"
}, {
count: 15,
emote: "TenElevenTwelve"
},

]

// Define size & radius of donut pie chart
var width = 450,
height = 800,
radius = Math.min(width, height) / 2.5;

// Define arc colours
var colour = d3.scale.category20();

// Define arc ranges
var arcText = d3.scale.ordinal()
.rangeRoundBands([0, width], .1, .3);

// Determine size of arcs
var arc = d3.svg.arc()
.innerRadius(radius - 130)
.outerRadius(radius - 10);

// Create the donut pie chart layout
var pie = d3.layout.pie()
.value(function(d) {
return d.count;
})
.sort(null);

// Append SVG attributes and append g to the SVG
var mySvg = d3.select('body').append("svg")
.attr("width", width)
.attr("height", height);

var svg = mySvg
.append("g")
.attr("transform", "translate(" + radius + "," + radius + ")");

var svgText = mySvg
.append("g")
.attr("transform", "translate(" + radius + "," + radius + ")");

// Define inner circle
svg.append("circle")
.attr("cx", 0)
.attr("cy", 0)
.attr("r", 100)
.attr("fill", "#fff");

// Calculate SVG paths and fill in the colours
var g = svg.selectAll(".arc")
.data(pie(newData))
.enter().append("g")
.attr("class", "arc");

// Append the path to each g
g.append("path")
.attr("d", arc)
//.attr("data-legend", function(d, i){ return parseInt(newData[i].count) + ' ' + newData[i].emote; })
.attr("fill", function(d, i) {
return colour(i);
});

var textG = svg.selectAll(".labels")
.data(pie(newData))
.enter().append("g")
.attr("class", "labels");

// Append text labels to each arc
textG.append("text")
.attr("transform", function(d) {
return "translate(" + arc.centroid(d) + ")";
})
.attr("dy", ".35em")
.style("text-anchor", "middle")
.attr("fill", "#fff")
.text(function(d, i) {
return d.data.count > 0 ? d.data.emote : '';
});

var legendG = mySvg.selectAll(".legend")
.data(pie(newData))
.enter().append("g")
.attr("transform", function(d,i){
return "translate(" + (width - 110) + "," + (i * 15 + 20) + ")";
})
.attr("class", "legend");

legendG.append("rect")
.attr("width", 10)
.attr("height", 10)
.attr("fill", function(d, i) {
return colour(i);
});

legendG.append("text")
.text(function(d){
return d.value + " " + d.data.emote;
})
.style("font-size", 12)
.attr("y", 10)
.attr("x", 11);


</script>
</body>

</html>

关于javascript - 如何在 d3 饼图中添加漂亮的图例,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32298837/

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