Class ChartUtils

java.lang.Object

com.arbergashi.charts.util.ChartUtils

public final class ChartUtils
extends Object

Helper methods for coordinate transformations.

Since:

2026-01-01

Version:

1.0.0

Author:

Arber Gashi

Method Summary

Modifier and Type	Method	Description
static double	calculateBestBarWidth(int count, double availableWidth, float paddingFactor)	Heuristic to determine an appropriate bar width for categorical/bar-like renderers.
static void	mapToPolar(double angleDeg, double rValue, PlotContext ctx, Point2D dest)	Map polar coordinates (angle in degrees, radius in data units) to pixels.
static double	transformX(double x, PlotContext ctx)	Transforms X coordinate to pixels.
static double	transformY(double y, PlotContext ctx)	Transforms Y coordinate to pixels.

Methods inherited from class Object

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

Method Details

transformX

public static double transformX(double x,
 PlotContext ctx)

Transforms X coordinate to pixels. Uses PlotContext internally.

transformY

public static double transformY(double y,
 PlotContext ctx)

Transforms Y coordinate to pixels.

mapToPolar

public static void mapToPolar(double angleDeg,
 double rValue,
 PlotContext ctx,
 Point2D dest)

Map polar coordinates (angle in degrees, radius in data units) to pixels. Writes result to supplied Point2D (allocation-free).

calculateBestBarWidth

public static double calculateBestBarWidth(int count,
 double availableWidth,
 float paddingFactor)

Heuristic to determine an appropriate bar width for categorical/bar-like renderers. Returns at least 1.0 to avoid zero-width bars.