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G6

Rect

5 min read

A built-in node Rect has the default style as below, the label is drawed on the center of it.

Usage

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

1 Global Configure When Instantiating a Graph

Assign shape to 'rect' in the defaultNode object when instantiating a Graph:

const graph = new G6.Graph({
  container: 'mountNode',
  width: 800,
  height: 600,
  defaultNode: {
    shape: 'rect',
    // Other configuraltions
  },
});

2 Configure in the Data

To configure different nodes with different properties, you can write the properties into the node data.

const data = {
  nodes: [
    {
      id: 'node0',
      shape: 'rect',
      //... // Other configurations
    },
    //... // Other nodes
  ],
  edges: [
    //... // edges
  ],
};

Property

The Node Common Properties are available for Rect node, some special properties are shown below. The property with Object type will be described after the table:

Name Description Type Remark
size The size of the ellipse Number / Array When it is a number, the width and height are the same.
style The default style of rect node Object Correspond to the styles in Canvas
label The text of the label String
labelCfg The configurations of the label Object
stateStyles The styles in different states Object Only takes effect on keyShape
linkPoints The link points in visual Object They are invisible by default. It is usually used with the anchorPoints. The differences are described in linkPoints

style

The Node Common Styles are available for Circle node.style is an object to configure the filling color, stroke, and other styles.

Name Description Type Remark
radius The border radius Number Rectangle with no border radius by default
stroke The color of the stroke String
lineWidth The line width of the stroke Number 1 by default
fill The filling color String
fillOpacity The opacity Number 1 by default

The following code shows how to configure the style globally when instantiating a Graph.

const data = {
  nodes: [
    {
      x: 100,
      y: 100,
      shape: 'rect',
      label: 'rect',
    },
  ],
};

const graph = new G6.Graph({
  container: 'mountNode',
  width: 500,
  height: 300,
  defaultNode: {
    // shape: 'rect', // The shape has been assigned in the data, we do not have to define it any more
    style: {
      fill: '#bae637',
      stroke: '#eaff8f',
      lineWidth: 5,
      radius: 10,
    },
  },
});
graph.data(data);
graph.render();

labelCfg

labelCfg is an object to configure the label of the node. The Node Common Label Configurations are available. Base on the code in style section, we add labelCfg to defaultNode.

const data = {
  // ... data
};
const graph = new G6.Graph({
  // ... Other configurations for graph
  defaultNode: {
    // ... Other properties for node
    labelCfg: {
      style: {
        fill: '#9254de',
        fontSize: 18,
      },
      position: 'bottom',
    },
  },
});
// ...

linkPoints

linkPoints is an object to configure the small circles on the 「top, bottom, left, and right」.

⚠️Attention: It is different from anchorPoints: anchorPoints is an 「array」 that indicates the actual relative positions used to specify the join position of the relevant edge of the node (refer to anchorPoints); linkPoints is an object that indicates whether 「render」the four small circles, which do not connect the relevant edges. These two properties are often used together.

Name Description Type Remark
top Whether to show the top small circle Boolean false by default
bottom Whether to show the bototm small circle Boolean false by default
left Whether to show the left small circle Boolean false by default
right Whether to show the right small circle Boolean false by default
size The size of the small circles Number 3 by default
fill The filling color of the small circles String '#72CC4A' by default
stroke The stroke color of the small circles String '#72CC4A' by default
lineWidth The line width of the small circles Number 1 by default

Base on the code in style section, we add linkPoints to defaultNode.

const data = {
  // ... data
};
const graph = new G6.Graph({
  // ... Other configurations for graph
  defaultNode: {
    // Other configurations for nodes
    linkPoints: {
      top: true,
      bottom: true,
      left: true,
      right: true,
      size: 5,
      fill: '#fff',
    },
  },
});
// ...