infovis.visualization.color
Class NominalColor

java.lang.Object
  infovis.visualization.ColorVisualization
      infovis.visualization.color.NominalColor

All Implemented Interfaces:

EventListener, ChangeListener

public class NominalColor
extends ColorVisualization

Nominal columns color visualization.

Version:

$Revision: 1.13 $

Author:

Jean-Daniel Fekete

Constructor Summary

NominalColor(Column column)
Creates a new NominalColor object.

NominalColor(Column column, int numcategories)
Creates a new NominalColor object.

Method Summary

Color	getColor(int row) Returns a
int	getColorIndex(int row) Returns the color at the specified index.
int	getColorValue(int row) Returns the color value omputed for the specified row.
void	stateChanged(ChangeEvent e)

Methods inherited from class infovis.visualization.ColorVisualization

colorComplement, computeColor, getColumn, setColumn

Methods inherited from class java.lang.Object

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

Constructor Detail

NominalColor

public NominalColor(Column column,
                    int numcategories)

Creates a new NominalColor object.

Parameters:

column - the Column,

numcategories - number of categories.

NominalColor

public NominalColor(Column column)

Creates a new NominalColor object.

Parameters:

column - the Column,

Method Detail

getColorIndex

public int getColorIndex(int row)

Returns the color at the specified index.

Parameters:

row - the index

Returns:

the color at the specified index

getColorValue

public int getColorValue(int row)

Returns the color value omputed for the specified row.

Color are coded as a 32bits integers. If the color is coded with red, green, blue and alpha floating point values between 0 and 1, the returned value is: ((((int)(a * 255)) & 0xFF) << 24) | ((((int)(r * 255)) & 0xFF) << 16) | ((((int)(g * 255)) & 0xFF) << 8) | ((((int)(b * 255)) & 0xFF) << 0);

Specified by:

getColorValue in class ColorVisualization

Returns:

the color computed for the specified row.

getColor

public Color getColor(int row)

Returns a

Overrides:

getColor in class ColorVisualization

stateChanged

public void stateChanged(ChangeEvent e)