Class PolarAdvancedRenderer

java.lang.Object

com.arbergashi.charts.render.BaseRenderer

com.arbergashi.charts.render.circular.PolarAdvancedRenderer

All Implemented Interfaces:

ChartRenderer

public final class PolarAdvancedRenderer
extends BaseRenderer

Modern Stacked Polar Renderer

Draws a stacked polar area chart, ideal for comparing multiple series across different categories. Adheres to strict zero-allocation guidelines.

Features:

• Stacked Segments: Values from different series are stacked on top of each other.
• Polar Grid: A clean, circular grid for easy value comparison.
• Hover Effect: Segments are highlighted on mouse hover with a tooltip.
• Legend Support: Automatically integrates with the chart's legend.

Since:

2025-06-01

Version:

1.0.0

Author:

Arber Gashi

Field Summary

Fields inherited from class BaseRenderer

PIXEL_BUF, PIXEL_BUF4

Constructor Summary

Constructors

Constructor	Description
PolarAdvancedRenderer()

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.

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

PolarAdvancedRenderer

public PolarAdvancedRenderer()

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.