weka.gui.visualize
Class Plot2D

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JPanel
                  weka.gui.visualize.Plot2D

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable

public class Plot2D

extends javax.swing.JPanel

This class plots datasets in two dimensions. It can also plot classifier errors and clusterer predictions.

Version:

$Revision: 1.20 $

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class javax.swing.JPanel

javax.swing.JPanel.AccessibleJPanel

Nested classes inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

static int	CONST_AUTOMATIC_SHAPE
static int	DEFAULT_SHAPE_SIZE
static int	DIAMOND_SHAPE
static int	ERROR_SHAPE
protected boolean	m_axisChanged if the user changes attribute assigned to an axis
protected java.awt.Color	m_axisColour Default colour for the axis
protected int	m_axisPad Axis padding
protected java.awt.Color	m_backgroundColour Default colour for the plot background
protected int	m_cIndex
protected FastVector	m_colorList The list of the colors used
protected java.awt.Color[]	m_DefaultColors default colours for colouring discrete class
protected int[][]	m_drawnPoints An array used to show if a point is hidden or not.
protected javax.swing.JFrame	m_InstanceInfo For popping up text info on data points
protected javax.swing.JTextArea	m_InstanceInfoText
protected int	m_JitterVal the level of jitter
protected java.util.Random	m_JRand random values for perterbing the data points
protected java.awt.Font	m_labelFont Font for labels
protected java.awt.FontMetrics	m_labelMetrics
protected java.lang.String	m_masterName The name of the master plot
protected PlotData2D	m_masterPlot The master plot
protected double	m_maxC
protected double	m_maxX Holds the min and max values of the x, y and colouring attributes over all plots
protected double	m_maxY
protected double	m_minC
protected double	m_minX
protected double	m_minY
protected Plot2DCompanion	m_plotCompanion An optional "compainion" of the panel.
protected Instances	m_plotInstances The instances to be plotted
protected boolean	m_plotResize if the user resizes the window, or the attributes selected for the attributes change, then the lookup table for points needs to be recalculated
protected FastVector	m_plots The plots to display
protected double[][]	m_pointLookup lookup table for plotted points
protected int	m_sIndex
protected int	m_tickSize Tick size
protected int	m_XaxisEnd
protected int	m_XaxisStart the offsets of the axes once label metrics are calculated
protected int	m_xIndex Indexes of the attributes to go on the x and y axis and the attribute to use for colouring and the current shape for drawing
protected int	m_YaxisEnd
protected int	m_YaxisStart
protected int	m_yIndex
static int	MAX_SHAPES
static int	MISSING_SHAPE
static int	PLUS_SHAPE
static int	TRIANGLEDOWN_SHAPE
static int	TRIANGLEUP_SHAPE
static int	X_SHAPE

Fields inherited from class javax.swing.JPanel

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Container

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Plot2D()
Constructor

Method Summary

void	addPlot(PlotData2D newPlot) Add a plot to the list of plots to display
private boolean	checkPoints(double x1, double y1) This will check the values of the screen points passed and make sure that they land on the screen
double	convertToAttribX(double scx) convert a Panel x coordinate to a raw x value.
double	convertToAttribY(double scy) convert a Panel y coordinate to a raw y value.
double	convertToPanelX(double xval) Convert an raw x value to Panel x coordinate.
double	convertToPanelY(double yval) Convert an raw y value to Panel y coordinate.
void	determineBounds() Determine the min and max values for axis and colouring attributes
protected static void	drawDataPoint(double x, double y, double xprev, double yprev, int size, int shape, java.awt.Graphics gx) Draws a data point at a given set of panel coordinates at a given size and connects a line to the previous point.
protected static void	drawDataPoint(double x, double y, int size, int shape, java.awt.Graphics gx) Draws a data point at a given set of panel coordinates at a given size.
private static void	drawDiamond(java.awt.Graphics gx, double x, double y, int size) Draws a diamond.
private static void	drawPlus(java.awt.Graphics gx, double x, double y, int size) Draws a plus.
private static void	drawTriangleDown(java.awt.Graphics gx, double x, double y, int size) Draws an triangle (point at bottom).
private static void	drawTriangleUp(java.awt.Graphics gx, double x, double y, int size) Draws an triangle (point at top).
private static void	drawX(java.awt.Graphics gx, double x, double y, int size) Draws an X.
private void	extendColourMap(int highest) Add more colours to the colour map
private void	fillLookup() Fills the lookup caches for the plots.
PlotData2D	getMasterPlot() Get the master plot
double	getMaxC() Return the current max value of the colouring attribute
double	getMaxX() Return the current max value of the attribute plotted on the x axis
double	getMaxY() Return the current max value of the attribute plotted on the y axis
double	getMinC() Return the current min value of the colouring attribute
double	getMinX() Return the current min value of the attribute plotted on the x axis
double	getMinY() Return the current min value of the attribute plotted on the y axis
FastVector	getPlots() Return the list of plots
static void	main(java.lang.String[] args) Main method for testing this class
private void	paintAxis(java.awt.Graphics gx) Draws the axis and a spectrum if the colouring attribute is numeric
void	paintComponent(java.awt.Graphics gx) Renders this component
private void	paintData(java.awt.Graphics gx) Draws the data points and predictions (if provided).
(package private) int	pturbX(double xvalP, double xj) returns a value by which an x value can be peturbed.
(package private) int	pturbY(double yvalP, double yj) returns a value by which a y value can be peturbed.
void	removeAllPlots() Clears all plots
void	searchPoints(int x, int y, boolean newFrame) Pops up a window displaying attribute information on any instances at a point+-plotting_point_size (in panel coordinates)
void	setCindex(int c) Set the index of the attribute to use for colouring
void	setColours(FastVector cols) Set a list of colours to use when colouring points according to class values or cluster numbers
private void	setFonts(java.awt.Graphics gx) Set up fonts and font metrics
void	setInstances(Instances inst) Sets the master plot from a set of instances
void	setJitter(int j) Set level of jitter and repaint the plot using the new jitter value
void	setMasterPlot(PlotData2D master) Set the master plot.
void	setPlotCompanion(Plot2DCompanion p) Set a companion class.
private void	setProperties() Set the properties for Plot2D
void	setXindex(int x) Set the index of the attribute to go on the x axis
void	setYindex(int y) Set the index of the attribute to go on the y axis
private void	updatePturb() Updates the perturbed values for the plots when the jitter value is changed

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

MAX_SHAPES

public static final int MAX_SHAPES

See Also:

Constant Field Values

ERROR_SHAPE

public static final int ERROR_SHAPE

See Also:

Constant Field Values

MISSING_SHAPE

public static final int MISSING_SHAPE

See Also:

Constant Field Values

CONST_AUTOMATIC_SHAPE

public static final int CONST_AUTOMATIC_SHAPE

See Also:

Constant Field Values

X_SHAPE

public static final int X_SHAPE

See Also:

Constant Field Values

PLUS_SHAPE

public static final int PLUS_SHAPE

See Also:

Constant Field Values

DIAMOND_SHAPE

public static final int DIAMOND_SHAPE

See Also:

Constant Field Values

TRIANGLEUP_SHAPE

public static final int TRIANGLEUP_SHAPE

See Also:

Constant Field Values

TRIANGLEDOWN_SHAPE

public static final int TRIANGLEDOWN_SHAPE

See Also:

Constant Field Values

DEFAULT_SHAPE_SIZE

public static final int DEFAULT_SHAPE_SIZE

See Also:

Constant Field Values

m_axisColour

protected java.awt.Color m_axisColour

Default colour for the axis

m_backgroundColour

protected java.awt.Color m_backgroundColour

Default colour for the plot background

m_plots

protected FastVector m_plots

The plots to display

m_masterPlot

protected PlotData2D m_masterPlot

The master plot

m_masterName

protected java.lang.String m_masterName

The name of the master plot

m_plotInstances

protected Instances m_plotInstances

The instances to be plotted

m_plotCompanion

protected Plot2DCompanion m_plotCompanion

An optional "compainion" of the panel. If specified, this class will get to do its thing with our graphics context before we do any drawing. Eg. the visualize panel may need to draw polygons etc. before we draw plot axis and data points

m_InstanceInfo

protected javax.swing.JFrame m_InstanceInfo

For popping up text info on data points

m_InstanceInfoText

protected javax.swing.JTextArea m_InstanceInfoText

m_colorList

protected FastVector m_colorList

The list of the colors used

m_DefaultColors

protected java.awt.Color[] m_DefaultColors

default colours for colouring discrete class

m_xIndex

protected int m_xIndex

Indexes of the attributes to go on the x and y axis and the attribute to use for colouring and the current shape for drawing

m_yIndex

protected int m_yIndex

m_cIndex

protected int m_cIndex

m_sIndex

protected int m_sIndex

m_maxX

protected double m_maxX

Holds the min and max values of the x, y and colouring attributes over all plots

m_minX

protected double m_minX

m_maxY

protected double m_maxY

m_minY

protected double m_minY

m_maxC

protected double m_maxC

m_minC

protected double m_minC

m_axisPad

protected final int m_axisPad

Axis padding

See Also:

Constant Field Values

m_tickSize

protected final int m_tickSize

Tick size

See Also:

Constant Field Values

m_XaxisStart

protected int m_XaxisStart

the offsets of the axes once label metrics are calculated

m_YaxisStart

protected int m_YaxisStart

m_XaxisEnd

protected int m_XaxisEnd

m_YaxisEnd

protected int m_YaxisEnd

m_plotResize

protected boolean m_plotResize

if the user resizes the window, or the attributes selected for the attributes change, then the lookup table for points needs to be recalculated

m_axisChanged

protected boolean m_axisChanged

if the user changes attribute assigned to an axis

m_drawnPoints

protected int[][] m_drawnPoints

An array used to show if a point is hidden or not. This is used for speeding up the drawing of the plot panel although I am not sure how much performance this grants over not having it.

m_labelFont

protected java.awt.Font m_labelFont

Font for labels

m_labelMetrics

protected java.awt.FontMetrics m_labelMetrics

m_JitterVal

protected int m_JitterVal

the level of jitter

m_JRand

protected java.util.Random m_JRand

random values for perterbing the data points

m_pointLookup

protected double[][] m_pointLookup

lookup table for plotted points

Constructor Detail

Plot2D

public Plot2D()

Constructor

Method Detail

setProperties

private void setProperties()

Set the properties for Plot2D

checkPoints

private boolean checkPoints(double x1,
                            double y1)

This will check the values of the screen points passed and make sure that they land on the screen

Parameters:

x1 - The x coord.

y1 - The y coord.

setPlotCompanion

public void setPlotCompanion(Plot2DCompanion p)

Set a companion class. This is a class that might want to render something on the plot before we do our thing. Eg, Malcolm's shape drawing stuff needs to happen before we plot axis and points

Parameters:

p - a companion class

setJitter

public void setJitter(int j)

Set level of jitter and repaint the plot using the new jitter value

Parameters:

j - the level of jitter

setColours

public void setColours(FastVector cols)

Set a list of colours to use when colouring points according to class values or cluster numbers

Parameters:

cols - the list of colours to use

setXindex

public void setXindex(int x)

Set the index of the attribute to go on the x axis

Parameters:

x - the index of the attribute to use on the x axis

setYindex

public void setYindex(int y)

Set the index of the attribute to go on the y axis

Parameters:

y - the index of the attribute to use on the y axis

setCindex

public void setCindex(int c)

Set the index of the attribute to use for colouring

Parameters:

c - the index of the attribute to use for colouring

getPlots

public FastVector getPlots()

Return the list of plots

Returns:

the list of plots

getMasterPlot

public PlotData2D getMasterPlot()

Get the master plot

Returns:

the master plot

getMaxX

public double getMaxX()

Return the current max value of the attribute plotted on the x axis

Returns:

the max x value

getMaxY

public double getMaxY()

Return the current max value of the attribute plotted on the y axis

Returns:

the max y value

getMinX

public double getMinX()

Return the current min value of the attribute plotted on the x axis

Returns:

the min x value

getMinY

public double getMinY()

Return the current min value of the attribute plotted on the y axis

Returns:

the min y value

getMaxC

public double getMaxC()

Return the current max value of the colouring attribute

Returns:

the max colour value

getMinC

public double getMinC()

Return the current min value of the colouring attribute

Returns:

the min colour value

setInstances

public void setInstances(Instances inst)
                  throws java.lang.Exception

Sets the master plot from a set of instances

Parameters:

inst - the instances

Throws:

exception - Exception if instances could not be set

java.lang.Exception

setMasterPlot

public void setMasterPlot(PlotData2D master)
                   throws java.lang.Exception

Set the master plot.

Parameters:

master - the plot to make the master plot

Throws:

java.lang.Exception - if the plot could not be set.

removeAllPlots

public void removeAllPlots()

Clears all plots

addPlot

public void addPlot(PlotData2D newPlot)
             throws java.lang.Exception

Add a plot to the list of plots to display

Parameters:

newPlot - the new plot to add

Throws:

java.lang.Exception - if the plot could not be added

setFonts

private void setFonts(java.awt.Graphics gx)

Set up fonts and font metrics

Parameters:

gx - the graphics context

searchPoints

public void searchPoints(int x,
                         int y,
                         boolean newFrame)

Pops up a window displaying attribute information on any instances at a point+-plotting_point_size (in panel coordinates)

Parameters:

x - the x value of the clicked point

y - the y value of the clicked point

newFrame - true if instance info is to be displayed in a new frame.

determineBounds

public void determineBounds()

Determine the min and max values for axis and colouring attributes

convertToAttribX

public double convertToAttribX(double scx)

convert a Panel x coordinate to a raw x value.

Parameters:

scx - The Panel x coordinate

Returns:

A raw x value.

convertToAttribY

public double convertToAttribY(double scy)

convert a Panel y coordinate to a raw y value.

Parameters:

scy - The Panel y coordinate

Returns:

A raw y value.

pturbX

int pturbX(double xvalP,
           double xj)

returns a value by which an x value can be peturbed. Makes sure that the x value+pturb stays within the plot bounds

Parameters:

xvalP - the x coordinate to be peturbed

xj - a random number to use in calculating a peturb value

Returns:

a peturb value

convertToPanelX

public double convertToPanelX(double xval)

Convert an raw x value to Panel x coordinate.

Parameters:

xval - the raw x value

Returns:

an x value for plotting in the panel.

pturbY

int pturbY(double yvalP,
           double yj)

returns a value by which a y value can be peturbed. Makes sure that the y value+pturb stays within the plot bounds

Parameters:

yvalP - the y coordinate to be peturbed

yj - a random number to use in calculating a peturb value

Returns:

a peturb value

convertToPanelY

public double convertToPanelY(double yval)

Convert an raw y value to Panel y coordinate.

Parameters:

yval - the raw y value

Returns:

an y value for plotting in the panel.

drawX

private static void drawX(java.awt.Graphics gx,
                          double x,
                          double y,
                          int size)

Draws an X.

Parameters:

gx - the graphics context

x - the x coord

y - the y coord

size - the size of the shape

drawPlus

private static void drawPlus(java.awt.Graphics gx,
                             double x,
                             double y,
                             int size)

Draws a plus.

Parameters:

gx - the graphics context

x - the x coord

y - the y coord

size - the size of the shape

drawDiamond

private static void drawDiamond(java.awt.Graphics gx,
                                double x,
                                double y,
                                int size)

Draws a diamond.

Parameters:

gx - the graphics context

x - the x coord

y - the y coord

size - the size of the shape

drawTriangleUp

private static void drawTriangleUp(java.awt.Graphics gx,
                                   double x,
                                   double y,
                                   int size)

Draws an triangle (point at top).

Parameters:

gx - the graphics context

x - the x coord

y - the y coord

size - the size of the shape

drawTriangleDown

private static void drawTriangleDown(java.awt.Graphics gx,
                                     double x,
                                     double y,
                                     int size)

Draws an triangle (point at bottom).

Parameters:

gx - the graphics context

x - the x coord

y - the y coord

size - the size of the shape

drawDataPoint

protected static void drawDataPoint(double x,
                                    double y,
                                    double xprev,
                                    double yprev,
                                    int size,
                                    int shape,
                                    java.awt.Graphics gx)

Draws a data point at a given set of panel coordinates at a given size and connects a line to the previous point.

Parameters:

x - the x coord

y - the y coord

xprev - the x coord of the previous point

yprev - the y coord of the previous point

size - the size of the point

shape - the shape of the data point (square is reserved for nominal error data points). Shapes: 0=x, 1=plus, 2=diamond, 3=triangle(up), 4 = triangle (down).

gx - the graphics context

drawDataPoint

protected static void drawDataPoint(double x,
                                    double y,
                                    int size,
                                    int shape,
                                    java.awt.Graphics gx)

Draws a data point at a given set of panel coordinates at a given size.

Parameters:

x - the x coord

y - the y coord

size - the size of the point

shape - the shape of the data point (square is reserved for nominal error data points). Shapes: 0=x, 1=plus, 2=diamond, 3=triangle(up), 4 = triangle (down).

gx - the graphics context

updatePturb

private void updatePturb()

Updates the perturbed values for the plots when the jitter value is changed

fillLookup

private void fillLookup()

Fills the lookup caches for the plots. Also calculates errors for numeric predictions (if any) in plots

paintData

private void paintData(java.awt.Graphics gx)

Draws the data points and predictions (if provided).

Parameters:

gx - the graphics context

paintAxis

private void paintAxis(java.awt.Graphics gx)

Draws the axis and a spectrum if the colouring attribute is numeric

Parameters:

gx - the graphics context

extendColourMap

private void extendColourMap(int highest)

Add more colours to the colour map

paintComponent

public void paintComponent(java.awt.Graphics gx)

Renders this component

Parameters:

gx - the graphics context

main

public static void main(java.lang.String[] args)

Main method for testing this class

Parameters:

args - arguments