我想在 D3 的打包圆图中设置子圆的单独颜色。我还希望大小的文本出现在名称文本下。我如何实现这一目标?我已经在 json 中添加了颜色代码,示例如下。 JSfiddle 的链接是 https://jsfiddle.net/smitty1788/9fw51gL1/1/
{
"name": "Maryland",
"children": [{
"name": "Montgomery",
"children": [{
"name": "French",
"size": 600,
"fill":"#105908"
}, {
"name": "Italian",
"size": 700,
"fill":"#59084e"
}, {
"name": "Laotian",
"size": 800,
"fill":"#f45333"
}, {
"name": "African Languages",
"size": 900,
"fill":"#fFF000"
}]
}
这是d3脚本
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
margin = 20,
diameter = +svg.attr("width"),
g = svg.append("g").attr("transform", "translate(" + diameter / 2 + "," + diameter / 2 + ")");
var color = d3.scaleLinear()
.domain([-1, 5])
.range(["hsl(152,80%,80%)", "hsl(228,30%,40%)"])
.interpolate(d3.interpolateHcl);
var pack = d3.pack()
.size([diameter - margin, diameter - margin])
.padding(2);
d3.json("/flare.json", function(error, root) {
if (error) throw error;
root = d3.hierarchy(root)
.sum(function(d) { return d.size; })
.sort(function(a, b) { return b.value - a.value; });
var focus = root,
nodes = pack(root).descendants(),
view;
var circle = g.selectAll("circle")
.data(nodes)
.enter().append("circle")
.attr("class", function(d) { return d.parent ? d.children ? "node" : "node node--leaf" : "node node--root"; })
.style("fill", function(d) { return d.children ? color(d.depth) : null; })
.on("click", function(d) { if (focus !== d) zoom(d), d3.event.stopPropagation(); });
var text = g.selectAll("text")
.data(nodes)
.enter().append("text")
.attr("class", "label")
.style("fill-opacity", function(d) { return d.parent === root ? 1 : 0; })
.style("display", function(d) { return d.parent === root ? "inline" : "none"; })
.text(function(d) { return d.data.name; });
var node = g.selectAll("circle,text");
svg
.style("background", color(-1))
.on("click", function() { zoom(root); });
zoomTo([root.x, root.y, root.r * 2 + margin]);
function zoom(d) {
var focus0 = focus; focus = d;
var transition = d3.transition()
.duration(d3.event.altKey ? 7500 : 750)
.tween("zoom", function(d) {
var i = d3.interpolateZoom(view, [focus.x, focus.y, focus.r * 2 + margin]);
return function(t) { zoomTo(i(t)); };
});
transition.selectAll("text")
.filter(function(d) { return d.parent === focus || this.style.display === "inline"; })
.style("fill-opacity", function(d) { return d.parent === focus ? 1 : 0; })
.on("start", function(d) { if (d.parent === focus) this.style.display = "inline"; })
.on("end", function(d) { if (d.parent !== focus) this.style.display = "none"; });
}
function zoomTo(v) {
var k = diameter / v[2]; view = v;
node.attr("transform", function(d) { return "translate(" + (d.x - v[0]) * k + "," + (d.y - v[1]) * k + ")"; });
circle.attr("r", function(d) { return d.r * k; });
}
});
</script>
感谢您的帮助!
最佳答案
代替null
,为没有 child 的圈子返回d.data.fill
:
.style("fill", function(d) { return d.children ? color(d.depth) : d.data.fill; })
这是您更新后的 fiddle (您的彩色圆圈位于最右侧):https://jsfiddle.net/jv4ku850/
关于javascript - 如何设置 D3 Zoom Packed Circle children 的颜色,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41027339/