@swimlane/ngx-graph
Version:
Graph visualization for angular
127 lines • 16.2 kB
JavaScript
import { id } from '../../utils/id';
import * as dagre from 'dagre';
export var Orientation;
(function (Orientation) {
Orientation["LEFT_TO_RIGHT"] = "LR";
Orientation["RIGHT_TO_LEFT"] = "RL";
Orientation["TOP_TO_BOTTOM"] = "TB";
Orientation["BOTTOM_TO_TOM"] = "BT";
})(Orientation || (Orientation = {}));
export var Alignment;
(function (Alignment) {
Alignment["CENTER"] = "C";
Alignment["UP_LEFT"] = "UL";
Alignment["UP_RIGHT"] = "UR";
Alignment["DOWN_LEFT"] = "DL";
Alignment["DOWN_RIGHT"] = "DR";
})(Alignment || (Alignment = {}));
export class DagreLayout {
defaultSettings = {
orientation: Orientation.LEFT_TO_RIGHT,
marginX: 20,
marginY: 20,
edgePadding: 100,
rankPadding: 100,
nodePadding: 50,
multigraph: true,
compound: true
};
settings = {};
dagreGraph;
dagreNodes;
dagreEdges;
run(graph) {
this.createDagreGraph(graph);
dagre.layout(this.dagreGraph);
graph.edgeLabels = this.dagreGraph._edgeLabels;
for (const dagreNodeId in this.dagreGraph._nodes) {
const dagreNode = this.dagreGraph._nodes[dagreNodeId];
const node = graph.nodes.find(n => n.id === dagreNode.id);
node.position = {
x: dagreNode.x,
y: dagreNode.y
};
node.dimension = {
width: dagreNode.width,
height: dagreNode.height
};
}
return graph;
}
updateEdge(graph, edge) {
const sourceNode = graph.nodes.find(n => n.id === edge.source);
const targetNode = graph.nodes.find(n => n.id === edge.target);
// determine new arrow position
const dir = sourceNode.position.y <= targetNode.position.y ? -1 : 1;
const startingPoint = {
x: sourceNode.position.x,
y: sourceNode.position.y - dir * (sourceNode.dimension.height / 2)
};
const endingPoint = {
x: targetNode.position.x,
y: targetNode.position.y + dir * (targetNode.dimension.height / 2)
};
// generate new points
edge.points = [startingPoint, endingPoint];
return graph;
}
createDagreGraph(graph) {
const settings = Object.assign({}, this.defaultSettings, this.settings);
this.dagreGraph = new dagre.graphlib.Graph({ compound: settings.compound, multigraph: settings.multigraph });
this.dagreGraph.setGraph({
rankdir: settings.orientation,
marginx: settings.marginX,
marginy: settings.marginY,
edgesep: settings.edgePadding,
ranksep: settings.rankPadding,
nodesep: settings.nodePadding,
align: settings.align,
acyclicer: settings.acyclicer,
ranker: settings.ranker,
multigraph: settings.multigraph,
compound: settings.compound
});
// Default to assigning a new object as a label for each new edge.
this.dagreGraph.setDefaultEdgeLabel(() => {
return {
/* empty */
};
});
this.dagreNodes = graph.nodes.map(n => {
const node = Object.assign({}, n);
node.width = n.dimension.width;
node.height = n.dimension.height;
node.x = n.position.x;
node.y = n.position.y;
return node;
});
this.dagreEdges = graph.edges.map(l => {
const newLink = Object.assign({}, l);
if (!newLink.id) {
newLink.id = id();
}
return newLink;
});
for (const node of this.dagreNodes) {
if (!node.width) {
node.width = 20;
}
if (!node.height) {
node.height = 30;
}
// update dagre
this.dagreGraph.setNode(node.id, node);
}
// update dagre
for (const edge of this.dagreEdges) {
if (settings.multigraph) {
this.dagreGraph.setEdge(edge.source, edge.target, edge, edge.id);
}
else {
this.dagreGraph.setEdge(edge.source, edge.target);
}
}
return this.dagreGraph;
}
}
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{ Layout } from '../../models/layout.model';\nimport { Graph } from '../../models/graph.model';\nimport { id } from '../../utils/id';\nimport * as dagre from 'dagre';\nimport { Edge } from '../../models/edge.model';\n\nexport enum Orientation {\n  LEFT_TO_RIGHT = 'LR',\n  RIGHT_TO_LEFT = 'RL',\n  TOP_TO_BOTTOM = 'TB',\n  BOTTOM_TO_TOM = 'BT'\n}\nexport enum Alignment {\n  CENTER = 'C',\n  UP_LEFT = 'UL',\n  UP_RIGHT = 'UR',\n  DOWN_LEFT = 'DL',\n  DOWN_RIGHT = 'DR'\n}\n\nexport interface DagreSettings {\n  orientation?: Orientation;\n  marginX?: number;\n  marginY?: number;\n  edgePadding?: number;\n  rankPadding?: number;\n  nodePadding?: number;\n  align?: Alignment;\n  acyclicer?: 'greedy' | undefined;\n  ranker?: 'network-simplex' | 'tight-tree' | 'longest-path';\n  multigraph?: boolean;\n  compound?: boolean;\n}\n\nexport class DagreLayout implements Layout {\n  defaultSettings: DagreSettings = {\n    orientation: Orientation.LEFT_TO_RIGHT,\n    marginX: 20,\n    marginY: 20,\n    edgePadding: 100,\n    rankPadding: 100,\n    nodePadding: 50,\n    multigraph: true,\n    compound: true\n  };\n  settings: DagreSettings = {};\n\n  dagreGraph: any;\n  dagreNodes: any;\n  dagreEdges: any;\n\n  run(graph: Graph): Graph {\n    this.createDagreGraph(graph);\n    dagre.layout(this.dagreGraph);\n\n    graph.edgeLabels = this.dagreGraph._edgeLabels;\n\n    for (const dagreNodeId in this.dagreGraph._nodes) {\n      const dagreNode = this.dagreGraph._nodes[dagreNodeId];\n      const node = graph.nodes.find(n => n.id === dagreNode.id);\n      node.position = {\n        x: dagreNode.x,\n        y: dagreNode.y\n      };\n      node.dimension = {\n        width: dagreNode.width,\n        height: dagreNode.height\n      };\n    }\n\n    return graph;\n  }\n\n  updateEdge(graph: Graph, edge: Edge): Graph {\n    const sourceNode = graph.nodes.find(n => n.id === edge.source);\n    const targetNode = graph.nodes.find(n => n.id === edge.target);\n\n    // determine new arrow position\n    const dir = sourceNode.position.y <= targetNode.position.y ? -1 : 1;\n    const startingPoint = {\n      x: sourceNode.position.x,\n      y: sourceNode.position.y - dir * (sourceNode.dimension.height / 2)\n    };\n    const endingPoint = {\n      x: targetNode.position.x,\n      y: targetNode.position.y + dir * (targetNode.dimension.height / 2)\n    };\n\n    // generate new points\n    edge.points = [startingPoint, endingPoint];\n    return graph;\n  }\n\n  createDagreGraph(graph: Graph): any {\n    const settings = Object.assign({}, this.defaultSettings, this.settings);\n    this.dagreGraph = new dagre.graphlib.Graph({ compound: settings.compound, multigraph: settings.multigraph });\n\n    this.dagreGraph.setGraph({\n      rankdir: settings.orientation,\n      marginx: settings.marginX,\n      marginy: settings.marginY,\n      edgesep: settings.edgePadding,\n      ranksep: settings.rankPadding,\n      nodesep: settings.nodePadding,\n      align: settings.align,\n      acyclicer: settings.acyclicer,\n      ranker: settings.ranker,\n      multigraph: settings.multigraph,\n      compound: settings.compound\n    });\n\n    // Default to assigning a new object as a label for each new edge.\n    this.dagreGraph.setDefaultEdgeLabel(() => {\n      return {\n        /* empty */\n      };\n    });\n\n    this.dagreNodes = graph.nodes.map(n => {\n      const node: any = Object.assign({}, n);\n      node.width = n.dimension.width;\n      node.height = n.dimension.height;\n      node.x = n.position.x;\n      node.y = n.position.y;\n      return node;\n    });\n\n    this.dagreEdges = graph.edges.map(l => {\n      const newLink: any = Object.assign({}, l);\n      if (!newLink.id) {\n        newLink.id = id();\n      }\n      return newLink;\n    });\n\n    for (const node of this.dagreNodes) {\n      if (!node.width) {\n        node.width = 20;\n      }\n      if (!node.height) {\n        node.height = 30;\n      }\n\n      // update dagre\n      this.dagreGraph.setNode(node.id, node);\n    }\n\n    // update dagre\n    for (const edge of this.dagreEdges) {\n      if (settings.multigraph) {\n        this.dagreGraph.setEdge(edge.source, edge.target, edge, edge.id);\n      } else {\n        this.dagreGraph.setEdge(edge.source, edge.target);\n      }\n    }\n\n    return this.dagreGraph;\n  }\n}\n"]}