Class SunburstRenderer

java.lang.Object

com.arbergashi.charts.render.BaseRenderer

com.arbergashi.charts.render.circular.SunburstRenderer

All Implemented Interfaces:

ChartRenderer

public final class SunburstRenderer
extends BaseRenderer

Modern Sunburst Renderer

Draws a professional, interactive, and zero-allocation sunburst chart for hierarchical data.

Features:

• Interactive Drill-Down: Click segments to zoom in/out of the hierarchy.
• Path Highlighting: Highlights the entire path to a segment on hover.
• Smart Labels: Rotates and fits labels within segments.
• Dynamic Layout: Ring thickness adapts to hierarchy depth.

Since:

2024-06-01

Version:

1.0.0

Author:

Arber Gashi

Field Summary

Fields inherited from class BaseRenderer

PIXEL_BUF, PIXEL_BUF4

Constructor Summary

Constructors

Constructor	Description
SunburstRenderer()

Method Summary

Modifier and Type	Method	Description
void	clearHover()	Clears any hover/highlight state.
protected void	drawData(Graphics2D g2, ChartModel model, PlotContext context)	Implementation-specific drawing logic.
Optional<Integer>	getPointAt(Point2D pixel, ChartModel model, PlotContext context)	Returns the data index nearest to the given pixel coordinate, if supported.
void	handleClick(Point2D pixel, PlotContext context)	Handles a click event to perform drill-down/up operations.

Methods inherited from class BaseRenderer

drawHighlightPoint, drawI18nLabel, drawLabel, getArc, getCachedFont, getCachedGradient, getCachedStroke, getCachedStroke, getCachedStroke, getCubicCurve, getEllipse, getId, getLayerIndex, getLegendColor, getLine, getName, getPathCache, getRect, getRoundRectangle, getSeriesColor, getSeriesStroke, getTheme, getTooltipText, isLegendRequired, isMultiColor, pBuffer, pBuffer4, render, resolveTheme, seriesOrBase, setLayerIndex, setMultiColor, setTheme, setupQualityHints, themeAccent, themeAxisLabel, themeBackground, themeBearish, themeBullish, themeForeground, themeGrid, themeSeries

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ChartRenderer

createContext, getFocusValues, getPreferredYRange, renderEmptyState, supportsEmptyState

Constructor Details

SunburstRenderer

public SunburstRenderer()

Method Details

drawData

protected void drawData(Graphics2D g2,
 ChartModel model,
 PlotContext context)

Description copied from class: BaseRenderer

Implementation-specific drawing logic. Must follow Zero-Allocation rules.

Specified by:

drawData in class BaseRenderer

getPointAt

public Optional<Integer> getPointAt(Point2D pixel,
 ChartModel model,
 PlotContext context)

Description copied from class: BaseRenderer

Returns the data index nearest to the given pixel coordinate, if supported.

Specified by:

getPointAt in interface ChartRenderer

Overrides:

getPointAt in class BaseRenderer

Parameters:

pixel - mouse/crosshair position in component coordinates

model - data model for this layer

context - current plot context

Returns:

optional point index

clearHover

public void clearHover()

Description copied from interface: ChartRenderer

Clears any hover/highlight state.

handleClick

public void handleClick(Point2D pixel,
 PlotContext context)

Handles a click event to perform drill-down/up operations.

Parameters:

pixel - The point that was clicked.

context - The current plot context.