@swimlane/ngx-graph
Version:
Graph visualization for angular
132 lines • 18.7 kB
JavaScript
import { id } from '../../utils/id';
import { forceCollide, forceLink, forceManyBody, forceSimulation } from 'd3-force';
import { Subject } from 'rxjs';
export function toD3Node(maybeNode) {
if (typeof maybeNode === 'string') {
return {
id: maybeNode,
x: 0,
y: 0
};
}
return maybeNode;
}
export class D3ForceDirectedLayout {
defaultSettings = {
force: forceSimulation().force('charge', forceManyBody().strength(-150)).force('collide', forceCollide(5)),
forceLink: forceLink()
.id(node => node.id)
.distance(() => 100)
};
settings = {};
inputGraph;
outputGraph;
d3Graph;
outputGraph$ = new Subject();
draggingStart;
run(graph) {
this.inputGraph = graph;
this.d3Graph = {
nodes: [...this.inputGraph.nodes.map(n => ({ ...n }))],
edges: [...this.inputGraph.edges.map(e => ({ ...e }))]
};
this.outputGraph = {
nodes: [],
edges: [],
edgeLabels: []
};
this.outputGraph$.next(this.outputGraph);
this.settings = Object.assign({}, this.defaultSettings, this.settings);
if (this.settings.force) {
this.settings.force
.nodes(this.d3Graph.nodes)
.force('link', this.settings.forceLink.links(this.d3Graph.edges))
.alpha(0.5)
.restart()
.on('tick', () => {
this.outputGraph$.next(this.d3GraphToOutputGraph(this.d3Graph));
});
}
return this.outputGraph$.asObservable();
}
updateEdge(graph, edge) {
const settings = Object.assign({}, this.defaultSettings, this.settings);
if (settings.force) {
settings.force
.nodes(this.d3Graph.nodes)
.force('link', settings.forceLink.links(this.d3Graph.edges))
.alpha(0.5)
.restart()
.on('tick', () => {
this.outputGraph$.next(this.d3GraphToOutputGraph(this.d3Graph));
});
}
return this.outputGraph$.asObservable();
}
d3GraphToOutputGraph(d3Graph) {
this.outputGraph.nodes = this.d3Graph.nodes.map((node) => ({
...node,
id: node.id || id(),
position: {
x: node.x,
y: node.y
},
dimension: {
width: (node.dimension && node.dimension.width) || 20,
height: (node.dimension && node.dimension.height) || 20
},
transform: `translate(${node.x - ((node.dimension && node.dimension.width) || 20) / 2 || 0}, ${node.y - ((node.dimension && node.dimension.height) || 20) / 2 || 0})`
}));
this.outputGraph.edges = this.d3Graph.edges.map(edge => ({
...edge,
source: toD3Node(edge.source).id,
target: toD3Node(edge.target).id,
points: [
{
x: toD3Node(edge.source).x,
y: toD3Node(edge.source).y
},
{
x: toD3Node(edge.target).x,
y: toD3Node(edge.target).y
}
]
}));
this.outputGraph.edgeLabels = this.outputGraph.edges;
return this.outputGraph;
}
onDragStart(draggingNode, $event) {
this.settings.force.alphaTarget(0.3).restart();
const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);
if (!node) {
return;
}
this.draggingStart = { x: $event.x - node.x, y: $event.y - node.y };
node.fx = $event.x - this.draggingStart.x;
node.fy = $event.y - this.draggingStart.y;
}
onDrag(draggingNode, $event) {
if (!draggingNode) {
return;
}
const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);
if (!node) {
return;
}
node.fx = $event.x - this.draggingStart.x;
node.fy = $event.y - this.draggingStart.y;
}
onDragEnd(draggingNode, $event) {
if (!draggingNode) {
return;
}
const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);
if (!node) {
return;
}
this.settings.force.alphaTarget(0);
node.fx = undefined;
node.fy = undefined;
}
}
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{ Layout } from '../../models/layout.model';\nimport { Graph } from '../../models/graph.model';\nimport { Node } from '../../models/node.model';\nimport { id } from '../../utils/id';\nimport { forceCollide, forceLink, forceManyBody, forceSimulation } from 'd3-force';\nimport { Edge } from '../../models/edge.model';\nimport { Observable, Subject } from 'rxjs';\nimport { NodePosition } from '../../models';\n\nexport interface D3ForceDirectedSettings {\n  force?: any;\n  forceLink?: any;\n}\nexport interface D3Node {\n  id?: string;\n  x: number;\n  y: number;\n  width?: number;\n  height?: number;\n  fx?: number;\n  fy?: number;\n}\nexport interface D3Edge {\n  source: string | D3Node;\n  target: string | D3Node;\n  midPoint: NodePosition;\n}\nexport interface D3Graph {\n  nodes: D3Node[];\n  edges: D3Edge[];\n}\nexport interface MergedNode extends D3Node, Node {\n  id: string;\n}\n\nexport function toD3Node(maybeNode: string | D3Node): D3Node {\n  if (typeof maybeNode === 'string') {\n    return {\n      id: maybeNode,\n      x: 0,\n      y: 0\n    };\n  }\n  return maybeNode;\n}\n\nexport class D3ForceDirectedLayout implements Layout {\n  defaultSettings: D3ForceDirectedSettings = {\n    force: forceSimulation<any>().force('charge', forceManyBody().strength(-150)).force('collide', forceCollide(5)),\n    forceLink: forceLink<any, any>()\n      .id(node => node.id)\n      .distance(() => 100)\n  };\n  settings: D3ForceDirectedSettings = {};\n\n  inputGraph: Graph;\n  outputGraph: Graph;\n  d3Graph: D3Graph;\n  outputGraph$: Subject<Graph> = new Subject();\n\n  draggingStart: { x: number; y: number };\n\n  run(graph: Graph): Observable<Graph> {\n    this.inputGraph = graph;\n    this.d3Graph = {\n      nodes: [...this.inputGraph.nodes.map(n => ({ ...n }))] as any,\n      edges: [...this.inputGraph.edges.map(e => ({ ...e }))] as any\n    };\n    this.outputGraph = {\n      nodes: [],\n      edges: [],\n      edgeLabels: []\n    };\n    this.outputGraph$.next(this.outputGraph);\n    this.settings = Object.assign({}, this.defaultSettings, this.settings);\n    if (this.settings.force) {\n      this.settings.force\n        .nodes(this.d3Graph.nodes)\n        .force('link', this.settings.forceLink.links(this.d3Graph.edges))\n        .alpha(0.5)\n        .restart()\n        .on('tick', () => {\n          this.outputGraph$.next(this.d3GraphToOutputGraph(this.d3Graph));\n        });\n    }\n\n    return this.outputGraph$.asObservable();\n  }\n\n  updateEdge(graph: Graph, edge: Edge): Observable<Graph> {\n    const settings = Object.assign({}, this.defaultSettings, this.settings);\n    if (settings.force) {\n      settings.force\n        .nodes(this.d3Graph.nodes)\n        .force('link', settings.forceLink.links(this.d3Graph.edges))\n        .alpha(0.5)\n        .restart()\n        .on('tick', () => {\n          this.outputGraph$.next(this.d3GraphToOutputGraph(this.d3Graph));\n        });\n    }\n\n    return this.outputGraph$.asObservable();\n  }\n\n  d3GraphToOutputGraph(d3Graph: D3Graph): Graph {\n    this.outputGraph.nodes = this.d3Graph.nodes.map((node: MergedNode) => ({\n      ...node,\n      id: node.id || id(),\n      position: {\n        x: node.x,\n        y: node.y\n      },\n      dimension: {\n        width: (node.dimension && node.dimension.width) || 20,\n        height: (node.dimension && node.dimension.height) || 20\n      },\n      transform: `translate(${node.x - ((node.dimension && node.dimension.width) || 20) / 2 || 0}, ${\n        node.y - ((node.dimension && node.dimension.height) || 20) / 2 || 0\n      })`\n    }));\n\n    this.outputGraph.edges = this.d3Graph.edges.map(edge => ({\n      ...edge,\n      source: toD3Node(edge.source).id,\n      target: toD3Node(edge.target).id,\n      points: [\n        {\n          x: toD3Node(edge.source).x,\n          y: toD3Node(edge.source).y\n        },\n        {\n          x: toD3Node(edge.target).x,\n          y: toD3Node(edge.target).y\n        }\n      ]\n    }));\n\n    this.outputGraph.edgeLabels = this.outputGraph.edges;\n    return this.outputGraph;\n  }\n\n  onDragStart(draggingNode: Node, $event: MouseEvent): void {\n    this.settings.force.alphaTarget(0.3).restart();\n    const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);\n    if (!node) {\n      return;\n    }\n    this.draggingStart = { x: $event.x - node.x, y: $event.y - node.y };\n    node.fx = $event.x - this.draggingStart.x;\n    node.fy = $event.y - this.draggingStart.y;\n  }\n\n  onDrag(draggingNode: Node, $event: MouseEvent): void {\n    if (!draggingNode) {\n      return;\n    }\n    const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);\n    if (!node) {\n      return;\n    }\n    node.fx = $event.x - this.draggingStart.x;\n    node.fy = $event.y - this.draggingStart.y;\n  }\n\n  onDragEnd(draggingNode: Node, $event: MouseEvent): void {\n    if (!draggingNode) {\n      return;\n    }\n    const node = this.d3Graph.nodes.find(d3Node => d3Node.id === draggingNode.id);\n    if (!node) {\n      return;\n    }\n\n    this.settings.force.alphaTarget(0);\n    node.fx = undefined;\n    node.fy = undefined;\n  }\n}\n"]}