vnodes

Vue components to create svg interactive graphs, diagrams or node visual tools.

Demo

https://tiagolr.github.io/vnodes/

Install

npm install vnodes

Get started

<template>
  <screen ref="screen">
    <edge v-for="edge in graph.edges" :data="edge" :nodes="graph.nodes" :key="edge.id">
    </edge>

    <!-- html can be placed inside node, defaults to <div>{{node.id}}</div> -->
    <node v-for="node in graph.nodes" :data="node" :key="node.id">
    </node>
  </screen>
</template>

import { Screen, Node, Edge, graph } from 'vnodes'
export default {
  components: {
     Screen,
     Node,
     Edge
  }
  data () {
    return {
      graph: new graph()
    }
  }
  created () {
    this.graph.createNode('a')
    this.graph.createNode('b')
    this.graph.createEdge('a', 'b')
    this.graph.graphNodes()
  }
}

Components

Components are independent and can be imported separately.

Screen

Svg wrapper with zoom, panning and other features.

<screen>
  <circle cx="50" cy="50" r="50" fill="red"/>
</screen>

Screen Options

Screen component uses svg-pan-zoom under the hood and screen takes options prop like this

<screen :options="options">
  <circle cx="50" cy="50" r="50" fill="red"/>
</screen>

you can refer to available options here

{
  viewportSelector: string,
  panEnabled: boolean,
  controlIconsEnabled: boolean,
  zoomEnabled: boolean,
  dblClickZoomEnabled: boolean,
  mouseWheelZoomEnabled: boolean,
  preventMouseEventsDefault: boolean,
  zoomScaleSensitivity: number,
  minZoom: number,
  maxZoom: number,
  fit: boolean,
  contain: boolean,
  center: boolean,
  refreshRate: 'auto',
  beforeZoom: function(){},
  onZoom: function(){},
  beforePan: function(){},
  onPan: function(){},
  onUpdatedCTM: function(){},
  customEventsHandler: {},
  eventsListenerElement: null
}

Node

Html wrapper for svg with additional features like, dragging and fitting contents.

<svg width="500" height="500">
  <node :data="{
    id: 'test',
    x: 100,
    y: 100,
    width: 250,
    height: 150}">
      <h1>My First Node!</h1>
  </node>
</svg>

Edge

Connects nodes using svg lines

<edge :data="{
  from: { x: 0, y: 0},
  to: { x: 100, y: 100}}"
></edge>

Edges require node references { from: id|Object, to: String|Object }, if nodes are refered by id(String) an array nodes must be passed:

<edge
  :data="{from: 'A', to: 'B'}"
  :nodes="[{id: 'A' ... ]">
</edge>

Edges can take anchor information to offset their position relative to a node,

<edge :data="{
  from: nodes[0],
  to: nodes[1],
  fromAnchor: 'center',
  toAnchor: 'top-left',
}">

anchors format can be:

• String 'center', 'left', 'right', 'top', 'top-left', 'top-right', 'bottom', 'bottom-left', 'bottom-right', 'cirlce', 'rect'
• Object { x?:Number|String, y?: Number|String, align?: String, snap?: String }

Examples of valid anchors:

null
{ x: 0, y: 0}
{ x: 10, y: 10 }
{ x: '50%', '50%' }
{ x: '50%', '50%', snap: 'rect' }
{ align: 'bottom-right' }
'center'
'top-left'
'circle'   // snaps offset to circle with radius node.width/2
'rect'     // snaps offset to node rectangle

Group

Surrounds a group of nodes with a rectangle, allows dragging multiple nodes.

<group :nodes="nodes">
  <h1>Group Label</h1>
</group>

Port

Placed inside a node, automatically offsets edges to a their position inside the nodes html [Ports demo].

Label

Create a label node that is positioned along an edge

<v-label :edge="graph.edges[0]" :perc="50" :offset="{x: 0, y: -50}">
  <h4>Content</h4>
</v-label>

graph.js

Can be used to store edges and nodes. Contains utility methods to build graphs, layouts, remove and create nodes, edges and so on.

Styling

The simplest way to style nodes and edges is using CSS

<style>
svg .node .content {
  border-radius: 50%;
  background-color: red;
}

svg .edge {
  stroke-width: 10;
  stroke: blue;
  marker-start: url(#arrow-start);
}
</style>

Markers

TODO routing orth manh metro https://resources.jointjs.com/demos/routing theme apply demo markers demo groups demo edge api review graph tools, nodes containing edge refs or adj list etc graph layouts https://www.yworks.com/products/yfiles/features#layout layered layouts https://github.com/erikbrinkman/d3-dag layered layouts https://www.yworks.com/pages/layered-graph-layout css animations demo/theme https://www.yworks.com/products/yfiles/features https://www.edrawmax.com/online/en/ https://js.cytoscape.org/