jcckit.plot
Class ErrorBarFactory

java.lang.Object
  jcckit.plot.ErrorBarFactory

All Implemented Interfaces:

SymbolFactory

public class ErrorBarFactory

extends java.lang.Object

implements SymbolFactory

Symbol factory for creating symbols with error bars. It wraps a SymbolFactory for creating the symbol. The error bars are Rectangles.

Curves with error bars are based on two DataCurves:

1. The plain curve.
2. An instance which stores the errors in x and y. It is assumed that the errors are positive values defining the error symmetrically around the curve points.

The ErrorBarFactory needs an instance of PositionHint as initial Hint for the next curve. Its origin must be the origin of the data coordinate system in device-independent coordinates. The position of PositionHint must be undefined.

Author:

Franz-Josef Elmer

Field Summary

static java.lang.String

SYMBOL_FACTORY_KEY Configuration parameter key.

Fields inherited from interface jcckit.plot.SymbolFactory

ATTRIBUTES_KEY, DEFAULT_SIZE, SIZE_KEY

Constructor Summary

ErrorBarFactory(ConfigParameters config)
Creates an instance from the specified configuration parameters.

Method Summary

GraphicalElement	createLegendSymbol(GraphPoint centerPosition, double size) Creates the legend symbol.
Symbol	createSymbol(GraphPoint point, Hint hintFromPreviousPoint, Hint hintFromPreviousCurve) Creates either the curve symbol or the error bars.

Methods inherited from class java.lang.Object

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

Field Detail

SYMBOL_FACTORY_KEY

public static final java.lang.String SYMBOL_FACTORY_KEY

Configuration parameter key.

See Also:

Constant Field Values

Constructor Detail

ErrorBarFactory

public ErrorBarFactory(ConfigParameters config)

Creates an instance from the specified configuration parameters.

Key & Default Value	Type	Mandatory	Description
symbolFactory = null	ConfigParameters	no	Definition of the wrapped SymbolFactory which generates the curve symbol without bars. By default an empty GraphicalComposite will be created.
size = 0	double	no	Width of the error bars.
attributes = null	ConfigParameters	no	Definition of the GraphicAttributes of the error bars.

Method Detail

createLegendSymbol

public GraphicalElement createLegendSymbol(GraphPoint centerPosition,
                                           double size)

Creates the legend symbol. Calls the wrapped SymbolFactory or returns an empty instance of GraphicalComposite if undefined.

Specified by:

createLegendSymbol in interface SymbolFactory

Parameters:

centerPosition - Center position of the symbol.

size - The size of the symbol. Will not be used if the symbol of the curve points have all the same size. In this case the symbol for the legend has the size of the curve symbols.

createSymbol

public Symbol createSymbol(GraphPoint point,
                           Hint hintFromPreviousPoint,
                           Hint hintFromPreviousCurve)

Creates either the curve symbol or the error bars. Error bars are created when hintFromPreviousCurve is an instance of PositionHint and its position attribute is not null. Otherwise the curve symbol is created. The position attributes stores the curve point (in device-independent coordinates). The origin is always as set in the initial PositionHint. The hint for the next curve wrapped by the returned Symbol is always a PositionHint.

Specified by:

createSymbol in interface SymbolFactory

Parameters:

point - The position of the symbol. In general it is a transformation of a corresponding DataPoint into a GraphPoint.

hintFromPreviousPoint - Hint from the previous point of the same Curve or null.

hintFromPreviousCurve - Hint from the previous Curve or null.