Class CandlestickRenderer

java.lang.Object

com.arbergashi.charts.render.BaseRenderer

com.arbergashi.charts.render.financial.CandlestickRenderer

All Implemented Interfaces:

ChartRenderer

public final class CandlestickRenderer
extends BaseRenderer

CandlestickRenderer - Professional OHLC Visualization

Enterprise-grade candlestick renderer for financial data visualization with proper OHLC (Open-High-Low-Close) representation.

Performance Characteristics:

• Render Time: ~0.2ms per candle
• Memory: Zero allocations (shape pooling)
• Typical: 2500 candles in < 500ms
• Clipping: Skips off-screen candles

Visual Style:

• Bullish (Close > Open): Green candle, gradient fill
• Bearish (Close < Open): Red candle, gradient fill
• Wicks: Thin line from high to low
• Body: Rectangle from open to close (rounded)

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
CandlestickRenderer()

Method Summary

Modifier and Type	Method	Description
protected void	drawData(Graphics2D g, 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.
CandlestickRenderer	setCompressGaps(boolean compressGaps)	Enables optional gap compression (e.g., hide non-trading periods).

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

clearHover, createContext, getFocusValues, getPreferredYRange, renderEmptyState, supportsEmptyState

Constructor Details

CandlestickRenderer

public CandlestickRenderer()

Method Details

setCompressGaps

public CandlestickRenderer setCompressGaps(boolean compressGaps)

Enables optional gap compression (e.g., hide non-trading periods).

drawData

protected void drawData(Graphics2D g,
 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