104 lines
3.1 KiB
TypeScript
104 lines
3.1 KiB
TypeScript
import { AnimationFrameController, AnimationFrameControllerHost, TransformIntegrator } from '@lib';
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import { PropertyValues } from '@lit/reactive-element';
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import { Layout } from 'webcola';
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import { FolkBaseConnection } from './folk-base-connection';
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import { FolkBaseSet } from './folk-base-set.ts';
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import { FolkShape } from './folk-shape.ts';
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export class FolkGraph extends FolkBaseSet implements AnimationFrameControllerHost {
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static override tagName = 'folk-graph';
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#graphSim = new Layout();
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#nodes = new Map<FolkShape, number>();
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#arrows = new Set<FolkBaseConnection>();
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#integrator = TransformIntegrator.register('graph');
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#rAF = new AnimationFrameController(this);
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connectedCallback() {
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super.connectedCallback();
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this.#rAF.start();
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}
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render() {}
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disconnectedCallback() {
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super.disconnectedCallback();
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this.#rAF.stop();
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this.#nodes.clear();
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this.#arrows.clear();
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}
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override update(changedProperties: PropertyValues<this>) {
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super.update(changedProperties);
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if (changedProperties.has('sourceElements')) {
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this.#createGraph();
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}
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}
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async tick() {
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this.#graphSim.start(1, 0, 0, 0, true, false);
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// Yield graph layout effects
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for (const node of this.#graphSim.nodes() as any[]) {
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const shape = node.id;
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this.#integrator.yield(shape, {
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x: node.x - shape.width / 2,
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y: node.y - shape.height / 2,
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rotation: shape.rotation,
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width: shape.width,
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height: shape.height,
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});
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}
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// Get integrated results and update graph state
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const results = await this.#integrator.integrate();
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for (const [shape, result] of results) {
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// TODO: this is a hack to get the node from the graph
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const node = this.#graphSim.nodes().find((n: any) => n.id === shape);
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if (node) {
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node.x = result.x + shape.width / 2;
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node.y = result.y + shape.height / 2;
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}
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}
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}
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#createGraph() {
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this.#nodes.clear();
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this.#arrows.clear();
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const colaNodes = this.#createNodes();
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const colaLinks = this.#createLinks();
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this.#graphSim.nodes(colaNodes).links(colaLinks).linkDistance(400).avoidOverlaps(true).handleDisconnected(true);
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}
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#createNodes() {
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return Array.from(this.sourceElements)
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.filter((element): element is FolkShape => element instanceof FolkShape)
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.map((shape, index) => {
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this.#nodes.set(shape, index);
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const rect = shape.getTransformDOMRect();
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return {
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id: shape,
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x: rect.center.x,
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y: rect.center.y,
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width: rect.width,
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height: rect.height,
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rotation: rect.rotation,
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};
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});
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}
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#createLinks() {
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return Array.from(this.sourceElements)
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.filter((element) => element instanceof FolkBaseConnection)
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.map((arrow) => {
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this.#arrows.add(arrow);
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const source = this.#nodes.get(arrow.sourceElement as FolkShape);
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const target = this.#nodes.get(arrow.targetElement as FolkShape);
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return source !== undefined && target !== undefined ? { source, target } : null;
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})
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.filter((link): link is { source: number; target: number } => link !== null);
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}
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}
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