# Sunburst Chart¶

An inner circle surrounded by rings of deeper hierarchy levels. The angle of each segment is proportional to a value or divided equally under its parent node.

## Set up¶

1. Assign a data source.

2. Set Breakdown with a view state parameter of type list, with the categories from your data source.

## Basics¶

Data Source
Data sources
Focus
A view state parameter for linking components
Node Click
Select between default, a fixed sunburst chart displaying all hierarchies as a single entity at all times, or rootToNode which redraws the chart based on the selected hierarchial interaction.
Selected Value
Selected Value Attribute
A view state parameter storing the selected hierarchy level as defined by Selected Value Attribute. Selected Value Attribute is one of name, value or dataIndex

## Data¶

Breakdown
Type list view state parameter to define hierarchial levels from the data source.
Weight
Dependent (numeric) variable from data source to define node size.

Color

option description
default Shared color across node hierarchies
fixed One color across all nodes
level Different colors at each hierarchial level
visual map Gradient color by Weight range,
Data column Selected from the data source.

## Config¶

A Radius Inner value above zero adds a 'doughnut' hole to the Sunburst chart. A Radius Outer value at 100 bounds the sunburst chart to the top and bottom of the component boundaries.

### Label¶

Show
Display
Toggle to show Display labels for each node value; Display values taken from a column in the data source.
Color
Font color for labels
Rotate
Position
Align
Set position and alignment of labels.

#### Font¶

Font size and font style of node labels.

#### Format¶

Format
Format of label
Decimal
Hide Trailing Zeroes
For numeric Formats
Date/Time Format
For Datetime Format
Prefix
Suffix
Add a piece of text, e.g. currency symbol or percentage, before or after the label.
Threshold
Frequency of node labels.
Fit Text
Select between Shorten Text or Overflow for the fit of labels.

### Visual map¶

Configuration for visual map of data color options

Type
Select between continuous gradient or defined piecewise
Label Color
Font color of Pieces label
Min
Max
Number of piecewise sections to use for visual map