@antv/f2
Version:
Charts for mobile visualization.
63 lines • 1.86 kB
JavaScript
import { packEnclose } from "./siblings.js";
import { optional } from "../accessors.js";
import constant, { constantZero } from "../constant.js";
function defaultRadius(d) {
return Math.sqrt(d.value);
}
export default function () {
var radius = null,
dx = 1,
dy = 1,
padding = constantZero;
function pack(root) {
root.x = dx / 2, root.y = dy / 2;
if (radius) {
root.eachBefore(radiusLeaf(radius)).eachAfter(packChildren(padding, 0.5)).eachBefore(translateChild(1));
} else {
root.eachBefore(radiusLeaf(defaultRadius)).eachAfter(packChildren(constantZero, 1)).eachAfter(packChildren(padding, root.r / Math.min(dx, dy))).eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
}
return root;
}
pack.radius = function (x) {
return arguments.length ? (radius = optional(x), pack) : radius;
};
pack.size = function (x) {
return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
};
pack.padding = function (x) {
return arguments.length ? (padding = typeof x === "function" ? x : constant(+x), pack) : padding;
};
return pack;
}
function radiusLeaf(radius) {
return function (node) {
if (!node.children) {
node.r = Math.max(0, +radius(node) || 0);
}
};
}
function packChildren(padding, k) {
return function (node) {
if (children = node.children) {
var children,
i,
n = children.length,
r = padding(node) * k || 0,
e;
if (r) for (i = 0; i < n; ++i) children[i].r += r;
e = packEnclose(children);
if (r) for (i = 0; i < n; ++i) children[i].r -= r;
node.r = e + r;
}
};
}
function translateChild(k) {
return function (node) {
var parent = node.parent;
node.r *= k;
if (parent) {
node.x = parent.x + k * node.x;
node.y = parent.y + k * node.y;
}
};
}