如何将 text 元素的文本对齐设置为 SVG g 元素(父框)的中心？
比如 html div 元素上的 text-align: center。
我尝试通过 D3.js 构建树状图
这是我尝试的代码:
leaf.append("text")
.attr("fill", "#fff")
//.style("text-anchor", "end")
.attr("width", d => d.x1 - d.x0)
.attr("height", d => d.y1 - d.y0)
// .attr("y", 0)
// .attr("x", 0)
// .attr("dy", 0)
.attr("font-size", d => Math.min(d.x1 - d.x0, d.y1 - d.y0) / 6)
.selectAll("tspan")
.data(d => d.data.name.split(/(?=[A-Z][^A-Z])/g).concat(format(d.data.volume)).concat(format(d.data.pc)))
.enter().append("tspan")
// .style("width", d => d.x1 - d.x0)
// .style("height", d => d.y1 - d.y0)
//.style("text-anchor", "middle")
.attr("dy", "1.1em")
.attr("x", "5")
.attr("font-weight", (d, i, nodes) => i === nodes.length - 1 ? "200" : "700")
.attr("font-size", (d) => d.value)
.text(d => d);
请查看 JSFiddle 上的示例代码
最佳答案
SVG 元素没有您在代码中使用的任何 HTML 属性。
此处的简单解决方案是设置 x属性到矩形的中间，使用 x0和 x1由 TreeMap 生成器创建的属性，结合 text-anchor: middle .但是，由于<tspan>绑定(bind)了奇怪的数据元素，我们必须向后弯腰才能从 parent 那里得到数据:
.attr("x", function() {
const parentData = d3.select(this.parentNode).datum();
return (parentData.x1 - parentData.x0) / 2;
});
这是您的代码，仅进行了更改:
let data = {
"name": "topLevel element",
"children": [{
"name": "group 1",
"children": [{
"name": "first child",
"volume": 567.2,
"value": 1250,
"price": 1201,
"pc": 1
},
{
"name": "secondary",
"volume": 7809.1,
"value": 12450,
"price": 13201,
"pc": 2
},
{
"name": "another",
"volume": 2163.7,
"value": 12450,
"price": 13201,
"pc": 3
},
{
"name": "like svg",
"volume": 1756.5,
"value": 12450,
"price": 13201,
"pc": 4
},
{
"name": "abc",
"volume": 1201.7,
"value": 12450,
"price": 13201,
"pc": 5
}
]
},
{
"name": "Group 2",
"children": [{
"name": "tripppp",
"volume": 2999.3,
"value": 12450,
"price": 13201,
"pc": 6
},
{
"name": "pardon",
"volume": 10398.3,
"value": 12450,
"price": 13201,
"pc": 7
},
{
"name": "world d3",
"volume": 10150.5,
"value": 12450,
"price": 13201,
"pc": 8
},
{
"name": "other bit",
"volume": 2652.6,
"value": 12450,
"price": 13201,
"pc": 7
},
{
"name": "rest train",
"volume": 2894,
"value": 12450,
"price": 13201,
"pc": 4
},
{
"name": "big data",
"volume": 6281.2,
"value": 12450,
"price": 13201,
"pc": 3
},
{
"name": "relase note",
"volume": 2431.3,
"value": 12450,
"price": 13201,
"pc": 3
},
{
"name": "seventeen",
"volume": 2373.5,
"value": 12450,
"price": 13201,
"pc": 2
},
{
"name": "fourth",
"volume": 1377.1,
"value": 12450,
"price": 13201,
"pc": 1
}
]
}
]
};
let chartDiv = document.getElementById("chart");
let svg = d3.select(chartDiv).append("svg");
var width = chartDiv.clientWidth;
var height = chartDiv.clientHeight;
let chart = () => {
const root = treemap(filteredData);
const svg = d3.select("svg");
svg
.attr("width", width)
.attr("height", height)
.classed("svg-content-responsive", true)
.attr("preserveAspectRatio", "xMinYMin meet")
.attr("viewBox", `0 0 ${width} ${height}`);
const leaf = svg.selectAll("g")
.data(root.leaves())
.enter().append("g")
.attr("transform", d => `translate(${d.x0},${d.y0})`);
leaf.append("title")
.text(d => `${d.ancestors().reverse().map(d => d.data.name).join("/")}\n${format(d.value)}`);
leaf.append("rect")
.attr("fill", "green")
.attr("fill-opacity", 1.0)
// .attr("text-anchor", "start")
// .attr("dominant-baseline", "central")
.attr("width", d => d.x1 - d.x0)
.attr("height", d => d.y1 - d.y0)
.attr("class", function(d) {
return "node level-" + d.depth;
});
// .on("mouseover", (d) => {
// d3.select(this)
// .style("stroke", "yellow")
// .style("opacity", 1)
// });
// leaf.append("clipPath")
// .attr("id", d => (d.clipUid = ("#clip")).id)
// .append("use")
// .attr("xlink:href", d => d.leafUid.href);
leaf.append("text")
.attr("fill", "#fff")
//.style("text-anchor", "end")
// .attr("clip-path", d => d.clipUid)
.attr("text-anchor", "middle")
.attr("width", d => d.x1 - d.x0)
.attr("height", d => d.y1 - d.y0)
// .attr("y", 0)
// .attr("x", 0)
// .attr("dy", 0)
.attr("font-size", d => Math.min(d.x1 - d.x0, d.y1 - d.y0) / 6)
.selectAll("tspan")
.data(d => d.data.name.split(/(?=[A-Z][^A-Z])/g).concat(format(d.data.volume)).concat(format(d.data.pc)))
.enter().append("tspan")
// .style("width", d => d.x1 - d.x0)
// .style("height", d => d.y1 - d.y0)
// .attr("lengthAdjust" ,"spacingAndGlyphs")
// .attr("transform", "(250 250 250 250)")
//.style("text-anchor", "middle")
// .attr("dominant-baseline", "central")
.attr("dy", "1.1em")
.attr("x", function() {
const parentData = d3.select(this.parentNode).datum();
return (parentData.x1 - parentData.x0) / 2;
})
// .attr("dx", 0)
// .attr("y", 18)
// .attr("y", (d, i, nodes) => `${(i === nodes.length ) * 1.3 + 1.2 + i * 1.9}em`)
.attr("font-weight", (d, i, nodes) => i === nodes.length - 1 ? "200" : "700")
// .attr("font-family", "Vazir")
.attr("font-size", (d) => d.value)
.text(d => d);
return svg.node();
}
let filteredData = d3.hierarchy(data)
.sum(d => d.volume)
.sort((a, b) => b.height - a.height || b.value - a.value);
let treemap = d3.treemap()
.size([width, height])
.padding(1)
.paddingRight(3)
.round(true);
let format = d3.format(",d");
chart();* {
font-family: 'Vazir', sans-serif;
}
/* Make the chart container fill the page using CSS. */
#chart {
background: #212121;
position: fixed;
left: 0px;
right: 0px;
top: 0px;
bottom: 0px;
font-family: 'Vazir', sans-serif;
}
g text {
text-shadow: 1px 2px 0 #555;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>
<link href="https://cdn.rawgit.com/rastikerdar/vazir-font/v19.2.0/dist/font-face.css" rel="stylesheet" type="text/css" />
<div id="chart"></div>PS:我写“仅进行了更改”，因为您的代码有几个明显的问题，例如分配 width和一个 margin到一个文本元素，我没有触及它。
关于javascript - 在 TreeMap 中将文本元素对齐到中间，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55032873/