treeSeparation

Author: mbostock

src/options.js

@@ -22,6 +22,7 @@ export const field = name => d => d[name];
 export const indexOf = (d, i) => i;
 export const identity = {transform: d => d};
 export const zero = () => 0;
+export const one = () => 1;
 export const string = x => x == null ? x : `${x}`;
 export const number = x => x == null ? x : +x;
 export const boolean = x => x == null ? x : !!x;

src/transforms/stack.js

@@ -1,6 +1,6 @@
 import {InternMap, cumsum, group, groupSort, greatest, max, min, rollup, sum} from "d3";
 import {ascendingDefined} from "../defined.js";
-import {field, channel, maybeChannel, maybeZ, mid, range, valueof, maybeZero} from "../options.js";
+import {field, channel, maybeChannel, maybeZ, mid, range, valueof, maybeZero, one} from "../options.js";
 import {basic} from "./basic.js";
 
 export function stackX(stackOptions = {}, options = {}) {
@@ -65,7 +65,7 @@ function mergeOptions(options) {
   return [{offset, order, reverse}, rest];
 }
 
-function stack(x, y = () => 1, ky, {offset, order, reverse}, options) {
+function stack(x, y = one, ky, {offset, order, reverse}, options) {
   const z = maybeZ(options);
   const [X, setX] = maybeChannel(x);
   const [Y1, setY1] = channel(y);

src/transforms/tree.js

@@ -1,12 +1,13 @@
 import {stratify, tree as Tree} from "d3";
-import {channel, isObject, range, valueof} from "../options.js";
+import {channel, isObject, one, range, valueof} from "../options.js";
 
 export function treeNode({
   path, // the delimited path
   delimiter, // how the path is separated
   frameAnchor = "left", // TODO different orientations
   tree = Tree, // TODO tree sort, tree separation
   treeSort,
+  treeSeparation,
   ...options
 } = {}) {
   const normalize = normalizer(delimiter);
@@ -21,8 +22,10 @@ export function treeNode({
     transform(data, facets) {
       const P = normalize(valueof(data, path));
       const root = stratify().path((i) => P[i])(range(data));
+      const layout = tree().nodeSize([1, 1]);
       if (treeSort != null) root.sort(treeSort);
-      tree().nodeSize([1, 1])(root);
+      if (treeSeparation !== undefined) layout.separation(treeSeparation ?? one);
+      layout(root);
       const X = setX([]);
       const Y = setY([]);
       for (const o of outputs) o[output_values] = o[output_setValues]([]);
@@ -45,6 +48,7 @@ export function treeLink({
   curve = "bump-x", // TODO depends on orientation
   tree = Tree, // TODO tree sort, tree separation
   treeSort,
+  treeSeparation,
   ...options
 } = {}) {
   const {stroke = "#555", strokeWidth = 1.5, strokeOpacity = 0.4} = options;
@@ -67,8 +71,10 @@ export function treeLink({
     transform(data, facets) {
       const P = normalize(valueof(data, path));
       const root = stratify().path(i => P[i])(range(data));
+      const layout = tree().nodeSize([1, 1]);
       if (treeSort != null) root.sort(treeSort);
-      tree().nodeSize([1, 1])(root);
+      if (treeSeparation !== undefined) layout.separation(treeSeparation ?? one);
+      layout(root);
       const X1 = setX1([]);
       const X2 = setX2([]);
       const Y1 = setY1([]);