nightingale-sunburst

A custom element that creates a sunburst visualization for a taxonomy tree.

This comoponent inherits from LitElement and therefore all the methods and properties from LitElements are also available here.

Usage

<nightingale-sunburst side="600" show-label />

API reference

Attributes

side: Number

This will be use as width and height of the canvas and as the diameter of the biggest circle in the sunburst.

default: 100

weight-attribute: String

The attribute in the data nodes that will be use to calculate the proportions of the segments in the sunburst.

Note: All the nodes in the data parameter should have an attribute named as indicated in this attribute.

default: "value"

name-attribute: String

The attribute in the data nodes that will be use to for the labels of each segment.

Note: All the nodes in the data parameter should have an attribute named as indicated in this attribute.

default: "name"

id-attribute: String

The attribute in the data nodes that will be used as a unique ID for each node.

Note: All the nodes in the data parameter should have an attribute named as indicated in this attribute.

default: "id"

max-depth: Number

The number of levels that the sunburst tree will be displayed. If not Included the component will go through the whole hierarchy.

default: Infinity

font-size: Number

Font size for the labels drawn over the segments.

default: 10

show-label: Boolean

If true the canvas will include some labels on the top-left corner with the information of the current segment. The current segment is the last one the user clicked on, or if none, it would be the segment where the mouse is hovering.

default: false

weight-attribute-label: String

Label to show in the labels. Only relevant if show-label is true

default: "Value"

Properties

data: Object

The hierarchy that will be represented in the sunburst. It should be an object representing the root Node with an attribute children as an array of other Node objects.

• Each Node should have a unique identifier in the property indicated in the attribute id-attribute.
• Each Node should have a name tag in the property indicated in the attribute name-attribute, used to generate the labels.
• Each Node should have a numerical value in the property indicated in the attribute weight-attribute representing the weight of that node in the tree.

activeSegment: Node [Read-Only]

The Node of the segment the is currrently hovered, or which has been clicked lastly.

holdSegment: Boolean [Read-Only]

Indicates if the activeSegment is been held from a recent click, and therefore is ignoring any other segment that has been currently hovered.

topOptions Array<String>

The list of options used on the first level of the sunburst, which define the color of its children segments.

default: ["bacteria", "viruses", "archaea", "eukaryota", null]

Methods

getColorBySuperKingdom(name: String): String

Returns a string representing the RGB color that is used for the given superkingdom string or any of its children.

renderCanvas(): void

You can use this method to manually trigger a render of the canvas.

Events

taxon-hover

Is dispatched when a segment is hovered or clicked onto. It includes the activeSegment data as its detail

Usage example:

sunburstElement.addEventListener("taxon-hover", (evt) => {
  console.log(evt.detail);
});