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javascript - d3js 在多行上写标签

转载 作者:行者123 更新时间:2023-11-28 04:14:47 25 4
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我正在研究图形,并且在图表方面遇到了一些困难。我想绘制饼图(或 donut )并以两行或更多行显示标签,以便为图表获得更多空间。

这是我的代码

var dataGroupPotential = [];
var pieGroup;
var svg;

processData("pieGPChart");

function processData(chartDivId) {
$("#pieGPLegend").text("Title : myTitle");

//Construction du tableau data

dataGroupPotential.push({
label: "long text 1 : 100 000 000",
value: 100000000
});
dataGroupPotential.push({
label: "long text 2 : 200 000 000",
value: 200000000
});
dataGroupPotential.push({
label: "long text 3 : 300 000 000",
value: 300000000
});


var width = $("#" + chartDivId).width();
var dividor = 2.75;
var height = width / dividor;

//Ajout des éléments svg pour tracer le graphique
svg = d3.select("#" + chartDivId).append("svg")
.attr("width", '100%')
.attr("height", '100%')
.attr('viewBox', '0 0 ' + Math.min(width, height) + ' ' + Math.min(width, height))
.attr('preserveAspectRatio', 'xMinYMin')
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");;

svg.append("g").attr("class", "slices");
svg.append("g").attr("class", "labels");
svg.append("g").attr("class", "lines");

$("#" + chartDivId).height(height);

drawMyPie(svg, dataGroupPotential, width, height);

window.addEventListener('resize', function(event) {
// do stuff here
var chartDivId = "pieGPChart";
var width = $("#" + chartDivId).width();
var dividor = 2.75;
var height = width / dividor;
$("#" + chartDivId).height(height);

drawMyPie(svg, dataGroupPotential, width, height);
});
}



function drawMyPie(svg, data, width, height) {
var radius = Math.min(width, height) / 2;

var pie = d3.pie()
.sort(null)
.value(function(d) {
return d.value;
});

var arc = d3.arc()
.outerRadius(radius * 0.8)
.innerRadius(radius * 0.4);

var outerArc = d3.arc()
.innerRadius(radius * 0.9)
.outerRadius(radius * 0.9);

//svg.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");

var key = function(d) {
return d.data.label;
};

var color = d3.scaleOrdinal(d3.schemeCategory20);
change(data);

function mergeWithFirstEqualZero(first, second) {
var secondSet = d3.set();
second.forEach(function(d) {
secondSet.add(d.label);
});

var onlyFirst = first
.filter(function(d) {
return !secondSet.has(d.label)
})
.map(function(d) {
return {
label: d.label,
value: 0
};
});
return d3.merge([second, onlyFirst])
.sort(function(a, b) {
return d3.ascending(a.label, b.label);
});
}

function change(data) {
var duration = 3000;
var data0 = svg.select(".slices").selectAll("path.slice")
.data().map(function(d) {
return d.data
});
if (data0.length == 0) data0 = data;
var was = mergeWithFirstEqualZero(data, data0);
var is = mergeWithFirstEqualZero(data0, data);

/* ------- SLICE ARCS -------*/

var slice = svg.select(".slices").selectAll("path.slice")
.data(pie(was), key);

slice.enter()
.insert("path")
.attr("class", "slice")
.style("fill", function(d) {
return color(d.data.label);
})
.each(function(d) {
this._current = d;
});

slice = svg.select(".slices").selectAll("path.slice")
.data(pie(is), key);

slice
.transition().duration(duration)
.attrTween("d", function(d) {
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
_this._current = interpolate(t);
return arc(_this._current);
};
});

slice = svg.select(".slices").selectAll("path.slice")
.data(pie(data), key);

slice
.exit().transition().delay(duration).duration(0)
.remove();

/* ------- TEXT LABELS -------*/

var text = svg.select(".labels").selectAll("text")
.data(pie(was), key);

text.enter()
.append("text")
.attr("dy", ".35em")
.style("opacity", 0)
.text(function(d) {
return d.data.label;
})
.each(function(d) {
this._current = d;
});

//var legend = text.enter();

//text.append("text")
// .attr("dy", "-10")
// .style("opacity", 0)
// .text(function (d) {
// return d.data.label;
// })
//.each(function (d) {
// this._current = d;
//});
//text.append("text")
// .attr("dy", "10")
// .style("opacity", 0)
// .text(function (d) {
// return d.data.label;
// })
//.each(function (d) {
// this._current = d;
//});

function midAngle(d) {
return d.startAngle + (d.endAngle - d.startAngle) / 2;
}

text = svg.select(".labels").selectAll("text")
.data(pie(is), key);

text.transition().duration(duration)
.style("opacity", function(d) {
return d.data.value == 0 ? 0 : 1;
})
.attrTween("transform", function(d) {
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
var d2 = interpolate(t);
_this._current = d2;
var pos = outerArc.centroid(d2);
pos[0] = radius * (midAngle(d2) < Math.PI ? 1 : -1);
return "translate(" + pos + ")";
};
})
.styleTween("text-anchor", function(d) {
var interpolate = d3.interpolate(this._current, d);
return function(t) {
var d2 = interpolate(t);
return midAngle(d2) < Math.PI ? "start" : "end";
};
});

text = svg.select(".labels").selectAll("text")
.data(pie(data), key);

text
.exit().transition().delay(duration)
.remove();

/* ------- SLICE TO TEXT POLYLINES -------*/

var polyline = svg.select(".lines").selectAll("polyline")
.data(pie(was), key);

polyline.enter()
.append("polyline")
.style("opacity", 0)
.each(function(d) {
this._current = d;
});

polyline = svg.select(".lines").selectAll("polyline")
.data(pie(is), key);

polyline.transition().duration(duration)
.style("opacity", function(d) {
return d.data.value == 0 ? 0 : .5;
})
.attrTween("points", function(d) {
this._current = this._current;
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
var d2 = interpolate(t);
_this._current = d2;
var pos = outerArc.centroid(d2);
pos[0] = radius * 0.95 * (midAngle(d2) < Math.PI ? 1 : -1);
return [arc.centroid(d2), outerArc.centroid(d2), pos];
};
});

polyline = svg.select(".lines").selectAll("polyline")
.data(pie(data), key);

polyline
.exit().transition().delay(duration)
.remove();
};
}
    svg {
width: 100%;
height: 100%;
}

path.slice {
stroke-width: 2px;
}

polyline {
opacity: .3;
stroke: black;
stroke-width: 2px;
fill: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.10.0/d3.js"></script>


<div class="panel panel-default">
<div class="panel-body">
<div style="text-align:center;" class="row">
<h4 id="pieGPLegend"></h4>
<div id="pieGPChart"></div>
</div>
</div>
</div>

对于标签,我想要类似的东西

long text 1
100 000 000

我已经尝试过一些东西,但没有成功。这是我尝试过的,但我仍然对 d3js 感到困惑

var legend = text.enter();

text.append("text")
.attr("dy", "-10")
.style("opacity", 0)
.text(function (d) {
return d.data.label;
})
.each(function (d) {
this._current = d;
});
text.append("text")
.attr("dy", "10")
.style("opacity", 0)
.text(function (d) {
return d.data.label;
})
.each(function (d) {
this._current = d;
});

欢迎任何帮助、建议、评论!谢谢

达米安

最佳答案

如果您希望始终在冒号后中断文本,最简单的方法是使用 <tspan> :

.append("tspan")
.attr("x", 0)
.attr("dy", "1.3em")
.text(function(d) {
return d.data.label.split(":")[1];
})

这是经过更改的代码:

var dataGroupPotential = [];
var pieGroup;
var svg;

processData("pieGPChart");

function processData(chartDivId) {
$("#pieGPLegend").text("Title : myTitle");

//Construction du tableau data

dataGroupPotential.push({
label: "long text 1 : 100 000 000",
value: 100000000
});
dataGroupPotential.push({
label: "long text 2 : 200 000 000",
value: 200000000
});
dataGroupPotential.push({
label: "long text 3 : 300 000 000",
value: 300000000
});


var width = $("#" + chartDivId).width();
var dividor = 2.75;
var height = width / dividor;

//Ajout des éléments svg pour tracer le graphique
svg = d3.select("#" + chartDivId).append("svg")
.attr("width", '100%')
.attr("height", '100%')
.attr('viewBox', '0 0 ' + Math.min(width, height) + ' ' + Math.min(width, height))
.attr('preserveAspectRatio', 'xMinYMin')
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");;

svg.append("g").attr("class", "slices");
svg.append("g").attr("class", "labels");
svg.append("g").attr("class", "lines");

$("#" + chartDivId).height(height);

drawMyPie(svg, dataGroupPotential, width, height);

window.addEventListener('resize', function(event) {
// do stuff here
var chartDivId = "pieGPChart";
var width = $("#" + chartDivId).width();
var dividor = 2.75;
var height = width / dividor;
$("#" + chartDivId).height(height);

drawMyPie(svg, dataGroupPotential, width, height);
});
}



function drawMyPie(svg, data, width, height) {
var radius = Math.min(width, height) / 2;

var pie = d3.pie()
.sort(null)
.value(function(d) {
return d.value;
});

var arc = d3.arc()
.outerRadius(radius * 0.8)
.innerRadius(radius * 0.4);

var outerArc = d3.arc()
.innerRadius(radius * 0.9)
.outerRadius(radius * 0.9);

//svg.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");

var key = function(d) {
return d.data.label;
};

var color = d3.scaleOrdinal(d3.schemeCategory20);
change(data);

function mergeWithFirstEqualZero(first, second) {
var secondSet = d3.set();
second.forEach(function(d) {
secondSet.add(d.label);
});

var onlyFirst = first
.filter(function(d) {
return !secondSet.has(d.label)
})
.map(function(d) {
return {
label: d.label,
value: 0
};
});
return d3.merge([second, onlyFirst])
.sort(function(a, b) {
return d3.ascending(a.label, b.label);
});
}

function change(data) {
var duration = 3000;
var data0 = svg.select(".slices").selectAll("path.slice")
.data().map(function(d) {
return d.data
});
if (data0.length == 0) data0 = data;
var was = mergeWithFirstEqualZero(data, data0);
var is = mergeWithFirstEqualZero(data0, data);

/* ------- SLICE ARCS -------*/

var slice = svg.select(".slices").selectAll("path.slice")
.data(pie(was), key);

slice.enter()
.insert("path")
.attr("class", "slice")
.style("fill", function(d) {
return color(d.data.label);
})
.each(function(d) {
this._current = d;
});

slice = svg.select(".slices").selectAll("path.slice")
.data(pie(is), key);

slice
.transition().duration(duration)
.attrTween("d", function(d) {
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
_this._current = interpolate(t);
return arc(_this._current);
};
});

slice = svg.select(".slices").selectAll("path.slice")
.data(pie(data), key);

slice
.exit().transition().delay(duration).duration(0)
.remove();

/* ------- TEXT LABELS -------*/

var text = svg.select(".labels").selectAll("text")
.data(pie(was), key);

text.enter()
.append("text")
.attr("dy", ".35em")
.style("opacity", 0)
.text(function(d) {
return d.data.label.split(":")[0] + ":";
})
.each(function(d) {
this._current = d;
})
.append("tspan")
.attr("x", 0)
.attr("dy", "1.3em")
.text(function(d) {
return d.data.label.split(":")[1];
})
.each(function(d) {
this._current = d;
});

//var legend = text.enter();

//text.append("text")
// .attr("dy", "-10")
// .style("opacity", 0)
// .text(function (d) {
// return d.data.label;
// })
//.each(function (d) {
// this._current = d;
//});
//text.append("text")
// .attr("dy", "10")
// .style("opacity", 0)
// .text(function (d) {
// return d.data.label;
// })
//.each(function (d) {
// this._current = d;
//});

function midAngle(d) {
return d.startAngle + (d.endAngle - d.startAngle) / 2;
}

text = svg.select(".labels").selectAll("text")
.data(pie(is), key);

text.transition().duration(duration)
.style("opacity", function(d) {
return d.data.value == 0 ? 0 : 1;
})
.attrTween("transform", function(d) {
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
var d2 = interpolate(t);
_this._current = d2;
var pos = outerArc.centroid(d2);
pos[0] = radius * (midAngle(d2) < Math.PI ? 1 : -1);
return "translate(" + pos + ")";
};
})
.styleTween("text-anchor", function(d) {
var interpolate = d3.interpolate(this._current, d);
return function(t) {
var d2 = interpolate(t);
return midAngle(d2) < Math.PI ? "start" : "end";
};
});

text = svg.select(".labels").selectAll("text")
.data(pie(data), key);

text
.exit().transition().delay(duration)
.remove();

/* ------- SLICE TO TEXT POLYLINES -------*/

var polyline = svg.select(".lines").selectAll("polyline")
.data(pie(was), key);

polyline.enter()
.append("polyline")
.style("opacity", 0)
.each(function(d) {
this._current = d;
});

polyline = svg.select(".lines").selectAll("polyline")
.data(pie(is), key);

polyline.transition().duration(duration)
.style("opacity", function(d) {
return d.data.value == 0 ? 0 : .5;
})
.attrTween("points", function(d) {
this._current = this._current;
var interpolate = d3.interpolate(this._current, d);
var _this = this;
return function(t) {
var d2 = interpolate(t);
_this._current = d2;
var pos = outerArc.centroid(d2);
pos[0] = radius * 0.95 * (midAngle(d2) < Math.PI ? 1 : -1);
return [arc.centroid(d2), outerArc.centroid(d2), pos];
};
});

polyline = svg.select(".lines").selectAll("polyline")
.data(pie(data), key);

polyline
.exit().transition().delay(duration)
.remove();
};
}
svg {
width: 100%;
height: 100%;
}

path.slice {
stroke-width: 2px;
}

polyline {
opacity: .3;
stroke: black;
stroke-width: 2px;
fill: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.10.0/d3.js"></script>


<div class="panel panel-default">
<div class="panel-body">
<div style="text-align:center;" class="row">
<h4 id="pieGPLegend"></h4>
<div id="pieGPChart"></div>
</div>
</div>
</div>

关于javascript - d3js 在多行上写标签,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45953810/

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