infovis.visualization.color
Class CategoricalColor

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

All Implemented Interfaces:

EventListener, ChangeListener

public class CategoricalColor
extends ColorVisualization

Color BasicVisualization for Categorical Colors.

Version:

$Revision: 1.13 $

Author:

Jean-Daniel Fekete

Constructor Summary

CategoricalColor(IntColumn column)
Creates a new CategoricalColor object.

CategoricalColor(IntColumn column, Color start)
Creates a new CategoricalColor object.

CategoricalColor(IntColumn column, float[] hsbStart)
Creates a new CategoricalColor object.

CategoricalColor(IntColumn column, float startHue, float startSaturation, float startValue)
Creates a new CategoricalColor object.

Method Summary

Color	getColorForValue(int val) Returns a color given a category number.
int	getColorValue(int row) Returns the color value omputed for the specified row.
Column	getColumn() Returns the managed Column.
void	setColumn(Column c) Sets the managed column.
void	stateChanged(ChangeEvent e)

Methods inherited from class infovis.visualization.ColorVisualization

colorComplement, computeColor, getColor

Methods inherited from class java.lang.Object

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

Constructor Detail

CategoricalColor

public CategoricalColor(IntColumn column,
                        float startHue,
                        float startSaturation,
                        float startValue)

Creates a new CategoricalColor object.

Parameters:

column - the Column,

startHue - Starting Hue

startSaturation - Starting Saturation.

startValue - Starting value.

CategoricalColor

public CategoricalColor(IntColumn column,
                        float[] hsbStart)

Creates a new CategoricalColor object.

Parameters:

column - the column.

hsbStart - a table of three floats for the hue, saturatio and brightness.

CategoricalColor

public CategoricalColor(IntColumn column,
                        Color start)

Creates a new CategoricalColor object.

Parameters:

column - the column.

start - the starting color in the hsb cirle.

CategoricalColor

public CategoricalColor(IntColumn column)

Creates a new CategoricalColor object.

Parameters:

column - the color.

Method Detail

stateChanged

public void stateChanged(ChangeEvent e)

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.

getColorForValue

public Color getColorForValue(int val)

Returns a color given a category number.

Parameters:

val - the category

Returns:

a color given a category number

getColumn

public Column getColumn()

Returns the managed Column.

Overrides:

getColumn in class ColorVisualization

Returns:

the managed Column.

setColumn

public void setColumn(Column c)

Sets the managed column.

Overrides:

setColumn in class ColorVisualization

Parameters:

c - the column.