logoCreated with Sketch.

G6

Quadratic

3 min read

A built-in edge Quadratic has the default style as below.

Usage

As stated in Built-in Edges , there are two ways to configure the edge: Configure it when instantiating a Graph globally; Configure it in the data.

1 Global Configure When Instantiating a Graph

Assign shape to 'quadratic' in the defaultEdge object when instantiating a Graph:

const graph = new G6.Graph({
  container: 'mountNode',
  width: 800,
  height: 600,
  defaultEdge: {
    shape: 'quadratic', // The type of the edge
    // ...  Other configuraltions
  },
});

2 Configure in the Data

To configure different edges with different properties, you can write the properties into the edge data.

const data = {
  nodes: [
    // ... // nodes
  ],
  edges: [{
    source: 'node0',
    target: 'node1'
    shape: 'quadratic',
    //... // Other configurations for edges
    style: {
      .//...  // Style properties for edges
    }
  },
    //... // Other edges
  ]
}

Property

Quadratic edge has the Common Edge Properties, and some commonly used properties are shown below. The properties with object type will be described in detail after the table.

Name Description Type Remark
color The color of the edge String The priority id lower than stroke in style
style The default style of edge Object Correspond to the styles in Canvas
label The text of the label String
labelCfg The configurations of the label Object
controlPoints The array of the control points for the quadratic curve Array If it is not assgined, the default control point on the center of the curve will take effect. e.g. [{ x: 10, y: 20 }]

 style

style is an object which is the same as the Common Edge Style Properties. The following code shows how to configure the style globally when instantiating a Graph.

const data = {
  nodes: [
    {
      id: 'node0',
      x: 100,
      y: 100,
      size: 20,
    },
    {
      id: 'node1',
      x: 200,
      y: 100,
      size: 20,
    },
  ],
  edges: [
    {
      source: 'node0',
      target: 'node1',
      shape: 'quadratic',
      label: 'quadratic',
    },
  ],
};
const graph = new G6.Graph({
  container: 'mountNode',
  width: 800,
  height: 600,
  defaultEdge: {
    // shape: 'quadratic',  // The shape has been assigned in the data, we do not have to define it any more
    style: {
      stroke: '#088',
      endArrow: true,
      lineWidth: 3,
    },
  },
});
graph.data(data);
graph.render();

labelCfg

labelCfg is an object which is the same as the Common Edge Label Properties. Base on the code in style section, we add labelCfg to defaultEdge. 

const data = {
  // ... data
};
const graph = new G6.Graph({
  // ... Other configurations for graph
  defaultEdge: {
    // ... Other properties for edges
    labelCfg: {
      refY: 10,
      refX: 40,
    },
  },
});
// ...