/**
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* @file The layout algorithm of node-link tree diagrams. Here we using Reingold-Tilford algorithm to drawing
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* the tree.
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*/
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import * as layout from '../../util/layout.js';
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import { TreeNode } from '../../data/Tree.js';
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import TreeSeriesModel from './TreeSeries.js';
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import ExtensionAPI from '../../core/ExtensionAPI.js';
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interface HierNode {
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defaultAncestor: TreeLayoutNode;
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ancestor: TreeLayoutNode;
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prelim: number;
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modifier: number;
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change: number;
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shift: number;
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i: number;
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thread: TreeLayoutNode;
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}
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export interface TreeLayoutNode extends TreeNode {
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parentNode: TreeLayoutNode;
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hierNode: HierNode;
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children: TreeLayoutNode[];
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}
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/**
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* Initialize all computational message for following algorithm.
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*/
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export declare function init(inRoot: TreeNode): void;
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/**
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* The implementation of this function was originally copied from "d3.js"
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* <https://github.com/d3/d3-hierarchy/blob/4c1f038f2725d6eae2e49b61d01456400694bac4/src/tree.js>
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* with some modifications made for this program.
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* See the license statement at the head of this file.
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*
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* Computes a preliminary x coordinate for node. Before that, this function is
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* applied recursively to the children of node, as well as the function
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* apportion(). After spacing out the children by calling executeShifts(), the
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* node is placed to the midpoint of its outermost children.
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*/
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export declare function firstWalk(node: TreeLayoutNode, separation: SeparationFunc): void;
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/**
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* The implementation of this function was originally copied from "d3.js"
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* <https://github.com/d3/d3-hierarchy/blob/4c1f038f2725d6eae2e49b61d01456400694bac4/src/tree.js>
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* with some modifications made for this program.
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* See the license statement at the head of this file.
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*
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* Computes all real x-coordinates by summing up the modifiers recursively.
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*/
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export declare function secondWalk(node: TreeLayoutNode): void;
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export declare function separation(cb?: SeparationFunc): SeparationFunc;
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/**
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* Transform the common coordinate to radial coordinate.
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*/
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export declare function radialCoordinate(rad: number, r: number): {
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x: number;
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y: number;
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};
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/**
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* Get the layout position of the whole view.
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*/
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export declare function getViewRect(seriesModel: TreeSeriesModel, api: ExtensionAPI): layout.LayoutRect;
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interface SeparationFunc {
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(node1: TreeLayoutNode, node2: TreeLayoutNode): number;
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}
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export {};
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