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375 lines
16 KiB
TypeScript
Executable File
375 lines
16 KiB
TypeScript
Executable File
/*
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* Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
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*/
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/*
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* This is an extension and not part of the main GoJS library.
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* Note that the API for this class may change with any version, even point releases.
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* If you intend to use an extension in production, you should copy the code to your own source directory.
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* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
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* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
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*/
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import * as go from '../release/go.js';
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/**
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* A custom Layout that provides one way to have a layout of layouts.
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* It partitions nodes and links into separate subgraphs, applies a primary
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* layout to each subgraph, and then arranges those results by an
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* arranging layout. Any disconnected nodes are laid out later by a
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* side layout, by default in a grid underneath the main body of subgraphs.
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*
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* If you want to experiment with this extension, try the <a href="../../extensionsTS/Arranging.html">Arranging Layout</a> sample.
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*
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* This layout uses three separate Layouts.
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*
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* One is used for laying out nodes and links that are connected together: {@link #primaryLayout}.
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* This defaults to null and must be set to an instance of a {@link Layout},
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* such as a {@link TreeLayout} or a {@link ForceDirectedLayout} or a custom Layout.
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*
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* One is used to arrange separate subnetworks of the main graph: {@link #arrangingLayout}.
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* This defaults to an instance of {@link GridLayout}.
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*
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* One is used for laying out the additional nodes along one of the sides of the main graph: {@link #sideLayout}.
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* This also defaults to an instance of {@link GridLayout}.
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* A filter predicate, {@link #filter}, splits up the collection of nodes and links into two subsets,
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* one for the main layout and one for the side layout.
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* By default, when there is no filter, it puts all nodes that have no link connections into the
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* subset to be processed by the side layout.
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*
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* If all pairs of nodes in the main graph can be reached by some path of undirected links,
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* there are no separate subnetworks, so the {@link #arrangingLayout} need not be used and
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* the {@link #primaryLayout} would apply to all of those nodes and links.
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*
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* But if there are disconnected subnetworks, the {@link #primaryLayout} is applied to each subnetwork,
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* and then all of those results are arranged by the {@link #arrangingLayout}.
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*
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* In either case if there are any nodes in the side graph, those are arranged by the {@link #sideLayout}
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* to be on the side of the arrangement of the main graph of nodes and links.
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*
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* Note: if you do not want to have singleton nodes be arranged by {@link #sideLayout},
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* set {@link #filter} to <code>function(part) { return true; }</code>.
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* That will cause all singleton nodes to be arranged by {@link #arrangingLayout} as if they
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* were each their own subgraph.
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*
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* If you both don't want to use {@link #sideLayout} and you don't want to use {@link #arrangingLayout}
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* to lay out connected subgraphs, don't use this ArrangingLayout at all --
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* just use whatever Layout you would have assigned to {@link #primaryLayout}.
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*
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* @category Layout Extension
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*/
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export class ArrangingLayout extends go.Layout {
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private _filter: ((part: go.Part) => boolean) | null = null;
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private _primaryLayout: go.Layout;
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private _arrangingLayout: go.Layout;
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private _sideLayout: go.Layout;
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private _side: go.Spot = go.Spot.BottomSide;
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private _spacing: go.Size = new go.Size(20, 20);
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constructor() {
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super();
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const play = new go.GridLayout();
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play.cellSize = new go.Size(1, 1);
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this._primaryLayout = play;
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const alay = new go.GridLayout();
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alay.cellSize = new go.Size(1, 1);
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this._arrangingLayout = alay;
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const slay = new go.GridLayout();
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slay.cellSize = new go.Size(1, 1);
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this._sideLayout = slay;
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}
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/**
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* @ignore @hidden @internal
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* Copies properties to a cloned Layout.
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*/
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cloneProtected(copy: this): void {
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super.cloneProtected(copy);
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copy._filter = this._filter;
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if (this._primaryLayout !== null) copy._primaryLayout = this._primaryLayout.copy();
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if (this._arrangingLayout !== null) copy._arrangingLayout = this._arrangingLayout.copy();
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if (this._sideLayout !== null) copy._sideLayout = this._sideLayout.copy();
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copy._side = this._side.copy();
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copy._spacing = this._spacing.copy();
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};
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/**
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* @hidden @internal
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* @param {Diagram|Group|Iterable} coll the collection of Parts to layout.
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*/
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doLayout(coll: go.Diagram | go.Group | go.Iterable<go.Part>) {
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const coll2 = this.collectParts(coll);
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const diagram = this.diagram;
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if (diagram === null) throw new Error("No Diagram for this Layout");
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// implementations of doLayout that do not make use of a LayoutNetwork
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// need to perform their own transactions
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diagram.startTransaction("Arranging Layout");
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const maincoll = new go.Set<go.Part>();
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const sidecoll = new go.Set<go.Part>();
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this.splitParts(coll2, maincoll, sidecoll);
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let mainnet = null;
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let subnets = null;
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if (this.arrangingLayout !== null) {
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mainnet = this.makeNetwork(maincoll);
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subnets = mainnet.splitIntoSubNetworks();
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}
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let bounds = null;
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if (this.arrangingLayout !== null && mainnet !== null && subnets !== null && subnets.count > 1) {
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const groups = new go.Map<go.Part, { parts: go.Set<go.Part>, bounds: go.Rect }>();
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const it = subnets.iterator;
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while (it.next()) {
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const net = it.value;
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const subcoll = net.findAllParts();
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this.preparePrimaryLayout(this.primaryLayout, subcoll);
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this.primaryLayout.doLayout(subcoll);
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this._addMainNode(groups, subcoll, diagram);
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}
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const mit = mainnet.vertexes.iterator;
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while (mit.next()) {
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const v = mit.value;
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if (v.node) {
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const subcoll = new go.Set<go.Part>();
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subcoll.add(v.node);
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this.preparePrimaryLayout(this.primaryLayout, subcoll);
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this.primaryLayout.doLayout(subcoll);
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this._addMainNode(groups, subcoll, diagram);
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}
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}
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this.arrangingLayout.doLayout(groups.toKeySet());
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const git = groups.iterator;
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while (git.next()) {
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const grp = git.key;
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const ginfo = git.value;
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this.moveSubgraph(ginfo.parts, ginfo.bounds, new go.Rect(grp.position, grp.desiredSize));
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}
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bounds = diagram.computePartsBounds(groups.toKeySet()); // not maincoll due to links without real bounds
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} else { // no this.arrangingLayout
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this.preparePrimaryLayout(this.primaryLayout, maincoll);
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this.primaryLayout.doLayout(maincoll);
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bounds = diagram.computePartsBounds(maincoll);
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this.moveSubgraph(maincoll, bounds, bounds);
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}
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if (!bounds.isReal()) bounds = new go.Rect(0, 0, 0, 0);
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this.prepareSideLayout(this.sideLayout, sidecoll, bounds);
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if (sidecoll.count > 0) {
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this.sideLayout.doLayout(sidecoll);
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let sidebounds = diagram.computePartsBounds(sidecoll);
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if (!sidebounds.isReal()) sidebounds = new go.Rect(0, 0, 0, 0);
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this.moveSideCollection(sidecoll, bounds, sidebounds);
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}
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diagram.commitTransaction("Arranging Layout");
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};
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/**
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* @hidden @internal
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* @param {*} subcoll
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*/
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_addMainNode(groups: go.Map<go.Part, { parts: go.Set<go.Part>, bounds: go.Rect }>, subcoll: go.Set<go.Part>, diagram: go.Diagram) {
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const grp = new go.Node();
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grp.locationSpot = go.Spot.Center;
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const grpb = diagram.computePartsBounds(subcoll);
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grp.desiredSize = grpb.size;
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grp.position = grpb.position;
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groups.add(grp, { parts: subcoll, bounds: grpb });
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}
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/**
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* Assign all of the Parts in the given collection into either the
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* set of Nodes and Links for the main graph or the set of Nodes and Links
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* for the side graph.
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*
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* By default this just calls the {@link #filter} on each non-Link to decide,
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* and then looks at each Link's connected Nodes to decide.
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*
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* A null filter assigns all Nodes that have connected Links to the main graph, and
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* all Links will be assigned to the main graph, and the side graph will only contain
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* Parts with no connected Links.
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* @param {Set} coll
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* @param {Set} maincoll
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* @param {Set} sidecoll
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*/
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splitParts(coll: go.Set<go.Part>, maincoll: go.Set<go.Part>, sidecoll: go.Set<go.Part>) {
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// first consider all Nodes
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const pred = this.filter;
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coll.each(function(p) {
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if (p instanceof go.Link) return;
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let main;
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if (pred) main = pred(p);
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else if (p instanceof go.Node) main = (p.linksConnected.count > 0);
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else main = (p instanceof go.Link);
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if (main) {
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maincoll.add(p);
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} else {
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sidecoll.add(p);
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}
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});
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// now assign Links based on which Nodes they connect with
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coll.each(function(p) {
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if (p instanceof go.Link) {
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if (!p.fromNode || !p.toNode) return;
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if (maincoll.contains(p.fromNode) && maincoll.contains(p.toNode)) {
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maincoll.add(p);
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} else if (sidecoll.contains(p.fromNode) && sidecoll.contains(p.toNode)) {
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sidecoll.add(p);
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}
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}
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});
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}
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/**
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* This method is called just before the primaryLayout is performed so that
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* there can be adjustments made to the primaryLayout, if desired.
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* By default this method makes no adjustments to the primaryLayout.
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* @param {Layout} primaryLayout the sideLayout that may be modified for the results of the primaryLayout
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* @param {Set} mainColl the Nodes and Links to be laid out by primaryLayout after being separated into subnetworks
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*/
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preparePrimaryLayout(primaryLayout: go.Layout, mainColl: go.Set<go.Part>) {
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// by default this is a no-op
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}
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/**
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* Move a Set of Nodes and Links to the given area.
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* @param {Set} subColl the Set of Nodes and Links that form a separate connected subgraph
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* @param {Rect} subbounds the area occupied by the subColl
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* @param {Rect} bounds the area where they should be moved according to the arrangingLayout
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*/
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moveSubgraph(subColl: go.Set<go.Part>, subbounds: go.Rect, bounds: go.Rect) {
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const diagram = this.diagram;
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if (!diagram) return;
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diagram.moveParts(subColl, bounds.position.subtract(subbounds.position), false);
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}
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/**
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* This method is called just after the main layouts (the primaryLayouts and arrangingLayout)
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* have been performed and just before the sideLayout is performed so that there can be
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* adjustments made to the sideLayout, if desired.
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* By default this method makes no adjustments to the sideLayout.
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* @param {Layout} sideLayout the sideLayout that may be modified for the results of the main layouts
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* @param {Set} sideColl the Nodes and Links filtered out to be laid out by sideLayout
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* @param {Rect} mainBounds the area occupied by the nodes and links of the main layout, after it was performed
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*/
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prepareSideLayout(sideLayout: go.Layout, sideColl: go.Set<go.Part>, mainBounds: go.Rect) {
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// by default this is a no-op
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}
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/**
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* This method is called just after the sideLayout has been performed in order to move
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* its parts to the desired area relative to the results of the main layouts.
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* By default this calls {@link Diagram#moveParts} on the sidecoll collection to the {@link #side} of the mainbounds.
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* This won't get called if there are no Parts in the sidecoll collection.
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* @param {Set} sidecoll a collection of Parts that were laid out by the sideLayout
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* @param {Rect} mainbounds the area occupied by the results of the main layouts
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* @param {Rect} sidebounds the area occupied by the results of the sideLayout
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*/
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moveSideCollection(sidecoll: go.Set<go.Part>, mainbounds: go.Rect, sidebounds: go.Rect) {
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const diagram = this.diagram;
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if (!diagram) return;
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if (this.side.includesSide(go.Spot.BottomSide)) {
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diagram.moveParts(sidecoll, new go.Point(mainbounds.x - sidebounds.x, mainbounds.y + mainbounds.height + this.spacing.height - sidebounds.y), false);
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} else if (this.side.includesSide(go.Spot.RightSide)) {
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diagram.moveParts(sidecoll, new go.Point(mainbounds.x + mainbounds.width + this.spacing.width - sidebounds.x, mainbounds.y - sidebounds.y), false);
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} else if (this.side.includesSide(go.Spot.TopSide)) {
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diagram.moveParts(sidecoll, new go.Point(mainbounds.x - sidebounds.x, mainbounds.y - sidebounds.height - this.spacing.height - sidebounds.y), false);
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} else if (this.side.includesSide(go.Spot.LeftSide)) {
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diagram.moveParts(sidecoll, new go.Point(mainbounds.x - sidebounds.width - this.spacing.width - sidebounds.x, mainbounds.y - sidebounds.y), false);
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}
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}
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// Public properties
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/**
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* Gets or sets the predicate function to call on each non-Link.
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* If the predicate returns true, the part will be laid out by the main layouts,
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* the primaryLayouts and the arrangingLayout, otherwise by the sideLayout.
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* The default value is a function that is true when there are any links connecting with the node.
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* Such default behavior will have the sideLayout position all of the singleton nodes.
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*/
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get filter(): ((part: go.Part) => boolean) | null { return this._filter; }
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set filter(val: ((part: go.Part) => boolean) | null) {
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if (val && typeof val !== 'function') throw new Error("new value for ArrangingLayout.filter must be a function, not: " + val);
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if (this._filter !== val) {
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this._filter = val;
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this.invalidateLayout();
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}
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}
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/**
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* Gets or sets the side {@link Spot} where the side nodes and links should be laid out,
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* relative to the results of the main Layout.
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* The default value is Spot.BottomSide.
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* Currently only handles a single side.
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* @name ArrangingLayout#side
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* @return {Spot}
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*/
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get side(): go.Spot { return this._side; }
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set side(val: go.Spot) {
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if (!(val instanceof go.Spot) || !val.isSide()) {
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throw new Error("new value for ArrangingLayout.side must be a side Spot, not: " + val);
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}
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if (!this._side.equals(val)) {
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this._side = val.copy();
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this.invalidateLayout();
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}
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}
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/**
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* Gets or sets the space between the main layout and the side layout.
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* The default value is Size(20, 20).
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* @name ArrangingLayout#spacing
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* @return {Size}
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*/
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get spacing(): go.Size { return this._spacing; }
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set spacing(val: go.Size) {
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if (!(val instanceof go.Size)) throw new Error("new value for ArrangingLayout.spacing must be a Size, not: " + val);
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if (!this._spacing.equals(val)) {
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this._spacing = val.copy();
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this.invalidateLayout();
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}
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}
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/**
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* Gets or sets the Layout used for the main part of the diagram.
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* The default value is an instance of GridLayout.
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* Any new value must not be null.
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*/
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get primaryLayout(): go.Layout { return this._primaryLayout; }
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set primaryLayout(val: go.Layout) {
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if (!(val instanceof go.Layout)) throw new Error("layout does not inherit from go.Layout: " + val);
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this._primaryLayout = val;
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this.invalidateLayout();
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}
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/**
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* Gets or sets the Layout used to arrange multiple separate connected subgraphs of the main graph.
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* The default value is an instance of GridLayout.
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* Set this property to null in order to get the default behavior of the @{link #primaryLayout}
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* when dealing with multiple connected graphs as a whole.
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*/
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get arrangingLayout(): go.Layout { return this._arrangingLayout; }
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set arrangingLayout(val: go.Layout) {
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if (val && !(val instanceof go.Layout)) throw new Error("layout does not inherit from go.Layout: " + val);
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this._arrangingLayout = val;
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this.invalidateLayout();
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}
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/**
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* Gets or sets the Layout used to arrange the "side" nodes and links -- those outside of the main layout.
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* The default value is an instance of GridLayout.
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* Any new value must not be null.
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*/
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get sideLayout(): go.Layout { return this._sideLayout; }
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set sideLayout(val: go.Layout) {
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if (!(val instanceof go.Layout)) throw new Error("layout does not inherit from go.Layout: " + val);
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this._sideLayout = val;
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this.invalidateLayout();
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}
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}
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