org.jfree.chart
Class JFreeChart

java.lang.Object
  org.jfree.chart.JFreeChart

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.EventListener, PlotChangeListener, TitleChangeListener, org.jfree.ui.Drawable

public class JFreeChart
extends java.lang.Object
implements org.jfree.ui.Drawable, TitleChangeListener, PlotChangeListener, java.io.Serializable, java.lang.Cloneable

A chart class implemented using the Java 2D APIs. The current version supports bar charts, line charts, pie charts and xy plots (including time series data).

JFreeChart coordinates several objects to achieve its aim of being able to draw a chart on a Java 2D graphics device: a list of Title objects (which often includes the chart's legend), a Plot and a Dataset (the plot in turn manages a domain axis and a range axis).

You should use a ChartPanel to display a chart in a GUI.

The ChartFactory class contains static methods for creating 'ready-made' charts.

See Also:

ChartPanel, ChartFactory, Title, Plot, Serialized Form

Field Summary

static java.awt.Image	DEFAULT_BACKGROUND_IMAGE The default background image.
static int	DEFAULT_BACKGROUND_IMAGE_ALIGNMENT The default background image alignment.
static float	DEFAULT_BACKGROUND_IMAGE_ALPHA The default background image alpha.
static java.awt.Paint	DEFAULT_BACKGROUND_PAINT The default background color.
static java.awt.Font	DEFAULT_TITLE_FONT The default font for titles.
static org.jfree.ui.about.ProjectInfo	INFO Information about the project.

Constructor Summary

JFreeChart(Plot plot)
Creates a new chart based on the supplied plot.

JFreeChart(java.lang.String title, java.awt.Font titleFont, Plot plot, boolean createLegend)
Creates a new chart with the given title and plot.

JFreeChart(java.lang.String title, Plot plot)
Creates a new chart with the given title and plot.

Method Summary

void	addChangeListener(ChartChangeListener listener) Registers an object for notification of changes to the chart.
void	addLegend(LegendTitle legend) Adds a legend to the plot and sends a ChartChangeEvent to all registered listeners.
void	addProgressListener(ChartProgressListener listener) Registers an object for notification of progress events relating to the chart.
void	addSubtitle(int index, Title subtitle) Adds a subtitle at a particular position in the subtitle list, and sends a ChartChangeEvent to all registered listeners.
void	addSubtitle(Title subtitle) Adds a chart subtitle, and notifies registered listeners that the chart has been modified.
void	clearSubtitles() Clears all subtitles from the chart and sends a ChartChangeEvent to all registered listeners.
java.lang.Object	clone() Clones the object, and takes care of listeners.
java.awt.image.BufferedImage	createBufferedImage(int width, int height) Creates and returns a buffered image into which the chart has been drawn.
java.awt.image.BufferedImage	createBufferedImage(int width, int height, ChartRenderingInfo info) Creates and returns a buffered image into which the chart has been drawn.
java.awt.image.BufferedImage	createBufferedImage(int imageWidth, int imageHeight, double drawWidth, double drawHeight, ChartRenderingInfo info) Creates and returns a buffered image into which the chart has been drawn.
java.awt.image.BufferedImage	createBufferedImage(int width, int height, int imageType, ChartRenderingInfo info) Creates and returns a buffered image into which the chart has been drawn.
void	draw(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area) Draws the chart on a Java 2D graphics device (such as the screen or a printer).
void	draw(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area, ChartRenderingInfo info) Draws the chart on a Java 2D graphics device (such as the screen or a printer).
void	draw(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D chartArea, java.awt.geom.Point2D anchor, ChartRenderingInfo info) Draws the chart on a Java 2D graphics device (such as the screen or a printer).
protected EntityCollection	drawTitle(Title t, java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area, boolean entities) Draws a title.
boolean	equals(java.lang.Object obj) Tests this chart for equality with another object.
void	fireChartChanged() Sends a default ChartChangeEvent to all registered listeners.
boolean	getAntiAlias() Returns a flag that indicates whether or not anti-aliasing is used when the chart is drawn.
java.awt.Image	getBackgroundImage() Returns the background image for the chart, or null if there is no image.
int	getBackgroundImageAlignment() Returns the background image alignment.
float	getBackgroundImageAlpha() Returns the alpha-transparency for the chart's background image.
java.awt.Paint	getBackgroundPaint() Returns the paint used for the chart background.
java.awt.Paint	getBorderPaint() Returns the paint used to draw the chart border (if visible).
java.awt.Stroke	getBorderStroke() Returns the stroke used to draw the chart border (if visible).
CategoryPlot	getCategoryPlot() Returns the plot cast as a CategoryPlot.
LegendTitle	getLegend() Returns the legend for the chart, if there is one.
LegendTitle	getLegend(int index) Returns the nth legend for a chart, or null.
org.jfree.ui.RectangleInsets	getPadding() Returns the padding between the chart border and the chart drawing area.
Plot	getPlot() Returns the plot for the chart.
java.awt.RenderingHints	getRenderingHints() Returns the collection of rendering hints for the chart.
Title	getSubtitle(int index) Returns a chart subtitle.
int	getSubtitleCount() Returns the number of titles for the chart.
java.util.List	getSubtitles() Returns the list of subtitles for the chart.
java.lang.Object	getTextAntiAlias() Returns the current value stored in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING.
TextTitle	getTitle() Returns the main chart title.
XYPlot	getXYPlot() Returns the plot cast as an XYPlot.
void	handleClick(int x, int y, ChartRenderingInfo info) Handles a 'click' on the chart.
boolean	isBorderVisible() Returns a flag that controls whether or not a border is drawn around the outside of the chart.
boolean	isNotify() Returns a flag that controls whether or not change events are sent to registered listeners.
static void	main(java.lang.String[] args) Prints information about JFreeChart to standard output.
protected void	notifyListeners(ChartChangeEvent event) Sends a ChartChangeEvent to all registered listeners.
protected void	notifyListeners(ChartProgressEvent event) Sends a ChartProgressEvent to all registered listeners.
void	plotChanged(PlotChangeEvent event) Receives notification that the plot has changed, and passes this on to registered listeners.
void	removeChangeListener(ChartChangeListener listener) Deregisters an object for notification of changes to the chart.
void	removeLegend() Removes the first legend in the chart and sends a ChartChangeEvent to all registered listeners.
void	removeProgressListener(ChartProgressListener listener) Deregisters an object for notification of changes to the chart.
void	removeSubtitle(Title title) Removes the specified subtitle and sends a ChartChangeEvent to all registered listeners.
void	setAntiAlias(boolean flag) Sets a flag that indicates whether or not anti-aliasing is used when the chart is drawn.
void	setBackgroundImage(java.awt.Image image) Sets the background image for the chart and sends a ChartChangeEvent to all registered listeners.
void	setBackgroundImageAlignment(int alignment) Sets the background alignment.
void	setBackgroundImageAlpha(float alpha) Sets the alpha-transparency for the chart's background image.
void	setBackgroundPaint(java.awt.Paint paint) Sets the paint used to fill the chart background and sends a ChartChangeEvent to all registered listeners.
void	setBorderPaint(java.awt.Paint paint) Sets the paint used to draw the chart border (if visible).
void	setBorderStroke(java.awt.Stroke stroke) Sets the stroke used to draw the chart border (if visible).
void	setBorderVisible(boolean visible) Sets a flag that controls whether or not a border is drawn around the outside of the chart.
void	setNotify(boolean notify) Sets a flag that controls whether or not listeners receive ChartChangeEvent notifications.
void	setPadding(org.jfree.ui.RectangleInsets padding) Sets the padding between the chart border and the chart drawing area, and sends a ChartChangeEvent to all registered listeners.
void	setRenderingHints(java.awt.RenderingHints renderingHints) Sets the rendering hints for the chart.
void	setSubtitles(java.util.List subtitles) Sets the title list for the chart (completely replaces any existing titles) and sends a ChartChangeEvent to all registered listeners.
void	setTextAntiAlias(boolean flag) Sets the value in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING to either RenderingHints.VALUE_TEXT_ANTIALIAS_ON or RenderingHints.VALUE_TEXT_ANTIALIAS_OFF, then sends a ChartChangeEvent to all registered listeners.
void	setTextAntiAlias(java.lang.Object val) Sets the value in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING and sends a ChartChangeEvent to all registered listeners.
void	setTitle(java.lang.String text) Sets the chart title and sends a ChartChangeEvent to all registered listeners.
void	setTitle(TextTitle title) Sets the main title for the chart and sends a ChartChangeEvent to all registered listeners.
void	titleChanged(TitleChangeEvent event) Receives notification that a chart title has changed, and passes this on to registered listeners.

Methods inherited from class java.lang.Object

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

Field Detail

INFO

public static final org.jfree.ui.about.ProjectInfo INFO

Information about the project.

DEFAULT_TITLE_FONT

public static final java.awt.Font DEFAULT_TITLE_FONT

The default font for titles.

DEFAULT_BACKGROUND_PAINT

public static final java.awt.Paint DEFAULT_BACKGROUND_PAINT

The default background color.

DEFAULT_BACKGROUND_IMAGE

public static final java.awt.Image DEFAULT_BACKGROUND_IMAGE

The default background image.

DEFAULT_BACKGROUND_IMAGE_ALIGNMENT

public static final int DEFAULT_BACKGROUND_IMAGE_ALIGNMENT

The default background image alignment.

See Also:

Constant Field Values

DEFAULT_BACKGROUND_IMAGE_ALPHA

public static final float DEFAULT_BACKGROUND_IMAGE_ALPHA

The default background image alpha.

See Also:

Constant Field Values

Constructor Detail

JFreeChart

public JFreeChart(Plot plot)

Creates a new chart based on the supplied plot. The chart will have a legend added automatically, but no title (although you can easily add one later).

Note that the ChartFactory class contains a range of static methods that will return ready-made charts, and often this is a more convenient way to create charts than using this constructor.

Parameters:

plot - the plot (null not permitted).

JFreeChart

public JFreeChart(java.lang.String title,
                  Plot plot)

Creates a new chart with the given title and plot. A default font (DEFAULT_TITLE_FONT) is used for the title, and the chart will have a legend added automatically.

Note that the ChartFactory class contains a range of static methods that will return ready-made charts, and often this is a more convenient way to create charts than using this constructor.

Parameters:

title - the chart title (null permitted).

plot - the plot (null not permitted).

JFreeChart

public JFreeChart(java.lang.String title,
                  java.awt.Font titleFont,
                  Plot plot,
                  boolean createLegend)

Creates a new chart with the given title and plot. The createLegend argument specifies whether or not a legend should be added to the chart.

Note that the ChartFactory class contains a range of static methods that will return ready-made charts, and often this is a more convenient way to create charts than using this constructor.

Parameters:

title - the chart title (null permitted).

titleFont - the font for displaying the chart title (null permitted).

plot - controller of the visual representation of the data (null not permitted).

createLegend - a flag indicating whether or not a legend should be created for the chart.

Method Detail

getRenderingHints

public java.awt.RenderingHints getRenderingHints()

Returns the collection of rendering hints for the chart.

Returns:

The rendering hints for the chart (never null).

See Also:

setRenderingHints(RenderingHints)

setRenderingHints

public void setRenderingHints(java.awt.RenderingHints renderingHints)

Sets the rendering hints for the chart. These will be added (using the Graphics2D.addRenderingHints() method) near the start of the JFreeChart.draw() method.

Parameters:

renderingHints - the rendering hints (null not permitted).

See Also:

getRenderingHints()

isBorderVisible

public boolean isBorderVisible()

Returns a flag that controls whether or not a border is drawn around the outside of the chart.

Returns:

A boolean.

See Also:

setBorderVisible(boolean)

setBorderVisible

public void setBorderVisible(boolean visible)

Sets a flag that controls whether or not a border is drawn around the outside of the chart.

Parameters:

visible - the flag.

See Also:

isBorderVisible()

getBorderStroke

public java.awt.Stroke getBorderStroke()

Returns the stroke used to draw the chart border (if visible).

Returns:

The border stroke.

See Also:

setBorderStroke(Stroke)

setBorderStroke

public void setBorderStroke(java.awt.Stroke stroke)

Sets the stroke used to draw the chart border (if visible).

Parameters:

stroke - the stroke.

See Also:

getBorderStroke()

getBorderPaint

public java.awt.Paint getBorderPaint()

Returns the paint used to draw the chart border (if visible).

Returns:

The border paint.

See Also:

setBorderPaint(Paint)

setBorderPaint

public void setBorderPaint(java.awt.Paint paint)

Sets the paint used to draw the chart border (if visible).

Parameters:

paint - the paint.

See Also:

getBorderPaint()

getPadding

public org.jfree.ui.RectangleInsets getPadding()

Returns the padding between the chart border and the chart drawing area.

Returns:

The padding (never null).

See Also:

setPadding(RectangleInsets)

setPadding

public void setPadding(org.jfree.ui.RectangleInsets padding)

Sets the padding between the chart border and the chart drawing area, and sends a ChartChangeEvent to all registered listeners.

Parameters:

padding - the padding (null not permitted).

See Also:

getPadding()

getTitle

public TextTitle getTitle()

Returns the main chart title. Very often a chart will have just one title, so we make this case simple by providing accessor methods for the main title. However, multiple titles are supported - see the addSubtitle(Title) method.

Returns:

The chart title (possibly null).

See Also:

setTitle(TextTitle)

setTitle

public void setTitle(TextTitle title)

Sets the main title for the chart and sends a ChartChangeEvent to all registered listeners. If you do not want a title for the chart, set it to null. If you want more than one title on a chart, use the addSubtitle(Title) method.

Parameters:

title - the title (null permitted).

See Also:

getTitle()

setTitle

public void setTitle(java.lang.String text)

Sets the chart title and sends a ChartChangeEvent to all registered listeners. This is a convenience method that ends up calling the setTitle(TextTitle) method. If there is an existing title, its text is updated, otherwise a new title using the default font is added to the chart. If text is null the chart title is set to null.

Parameters:

text - the title text (null permitted).

See Also:

getTitle()

addLegend

public void addLegend(LegendTitle legend)

Adds a legend to the plot and sends a ChartChangeEvent to all registered listeners.

Parameters:

legend - the legend (null not permitted).

See Also:

removeLegend()

getLegend

public LegendTitle getLegend()

Returns the legend for the chart, if there is one. Note that a chart can have more than one legend - this method returns the first.

Returns:

The legend (possibly null).

See Also:

getLegend(int)

getLegend

public LegendTitle getLegend(int index)

Returns the nth legend for a chart, or null.

Parameters:

index - the legend index (zero-based).

Returns:

The legend (possibly null).

See Also:

addLegend(LegendTitle)

removeLegend

public void removeLegend()

Removes the first legend in the chart and sends a ChartChangeEvent to all registered listeners.

See Also:

getLegend()

getSubtitles

public java.util.List getSubtitles()

Returns the list of subtitles for the chart.

Returns:

The subtitle list (possibly empty, but never null).

See Also:

setSubtitles(List)

setSubtitles

public void setSubtitles(java.util.List subtitles)

Sets the title list for the chart (completely replaces any existing titles) and sends a ChartChangeEvent to all registered listeners.

Parameters:

subtitles - the new list of subtitles (null not permitted).

See Also:

getSubtitles()

getSubtitleCount

public int getSubtitleCount()

Returns the number of titles for the chart.

Returns:

The number of titles for the chart.

See Also:

getSubtitles()

getSubtitle

public Title getSubtitle(int index)

Returns a chart subtitle.

Parameters:

index - the index of the chart subtitle (zero based).

Returns:

A chart subtitle.

See Also:

addSubtitle(Title)

addSubtitle

public void addSubtitle(Title subtitle)

Adds a chart subtitle, and notifies registered listeners that the chart has been modified.

Parameters:

subtitle - the subtitle (null not permitted).

See Also:

getSubtitle(int)

addSubtitle

public void addSubtitle(int index,
                        Title subtitle)

Adds a subtitle at a particular position in the subtitle list, and sends a ChartChangeEvent to all registered listeners.

Parameters:

index - the index (in the range 0 to getSubtitleCount()).

subtitle - the subtitle to add (null not permitted).

Since:

1.0.6

clearSubtitles

public void clearSubtitles()

Clears all subtitles from the chart and sends a ChartChangeEvent to all registered listeners.

See Also:

addSubtitle(Title)

removeSubtitle

public void removeSubtitle(Title title)

Removes the specified subtitle and sends a ChartChangeEvent to all registered listeners.

Parameters:

title - the title.

See Also:

addSubtitle(Title)

getPlot

public Plot getPlot()

Returns the plot for the chart. The plot is a class responsible for coordinating the visual representation of the data, including the axes (if any).

Returns:

The plot.

getCategoryPlot

public CategoryPlot getCategoryPlot()

Returns the plot cast as a CategoryPlot.

NOTE: if the plot is not an instance of CategoryPlot, then a ClassCastException is thrown.

Returns:

The plot.

See Also:

getPlot()

getXYPlot

public XYPlot getXYPlot()

Returns the plot cast as an XYPlot.

NOTE: if the plot is not an instance of XYPlot, then a ClassCastException is thrown.

Returns:

The plot.

See Also:

getPlot()

getAntiAlias

public boolean getAntiAlias()

Returns a flag that indicates whether or not anti-aliasing is used when the chart is drawn.

Returns:

The flag.

See Also:

setAntiAlias(boolean)

setAntiAlias

public void setAntiAlias(boolean flag)

Sets a flag that indicates whether or not anti-aliasing is used when the chart is drawn.

Anti-aliasing usually improves the appearance of charts, but is slower.

Parameters:

flag - the new value of the flag.

See Also:

getAntiAlias()

getTextAntiAlias

public java.lang.Object getTextAntiAlias()

Returns the current value stored in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING.

Returns:

The hint value (possibly null).

Since:

1.0.5

See Also:

setTextAntiAlias(Object)

setTextAntiAlias

public void setTextAntiAlias(boolean flag)

Sets the value in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING to either RenderingHints.VALUE_TEXT_ANTIALIAS_ON or RenderingHints.VALUE_TEXT_ANTIALIAS_OFF, then sends a ChartChangeEvent to all registered listeners.

Parameters:

flag - the new value of the flag.

Since:

1.0.5

See Also:

getTextAntiAlias(), setTextAntiAlias(Object)

setTextAntiAlias

public void setTextAntiAlias(java.lang.Object val)

Sets the value in the rendering hints table for RenderingHints.KEY_TEXT_ANTIALIASING and sends a ChartChangeEvent to all registered listeners.

Parameters:

val - the new value (null permitted).

Since:

1.0.5

See Also:

getTextAntiAlias(), setTextAntiAlias(boolean)

getBackgroundPaint

public java.awt.Paint getBackgroundPaint()

Returns the paint used for the chart background.

Returns:

The paint (possibly null).

See Also:

setBackgroundPaint(Paint)

setBackgroundPaint

public void setBackgroundPaint(java.awt.Paint paint)

Sets the paint used to fill the chart background and sends a ChartChangeEvent to all registered listeners.

Parameters:

paint - the paint (null permitted).

See Also:

getBackgroundPaint()

getBackgroundImage

public java.awt.Image getBackgroundImage()

Returns the background image for the chart, or null if there is no image.

Returns:

The image (possibly null).

See Also:

setBackgroundImage(Image)

setBackgroundImage

public void setBackgroundImage(java.awt.Image image)

Sets the background image for the chart and sends a ChartChangeEvent to all registered listeners.

Parameters:

image - the image (null permitted).

See Also:

getBackgroundImage()

getBackgroundImageAlignment

public int getBackgroundImageAlignment()

Returns the background image alignment. Alignment constants are defined in the org.jfree.ui.Align class in the JCommon class library.

Returns:

The alignment.

See Also:

setBackgroundImageAlignment(int)

setBackgroundImageAlignment

public void setBackgroundImageAlignment(int alignment)

Sets the background alignment. Alignment options are defined by the Align class.

Parameters:

alignment - the alignment.

See Also:

getBackgroundImageAlignment()

getBackgroundImageAlpha

public float getBackgroundImageAlpha()

Returns the alpha-transparency for the chart's background image.

Returns:

The alpha-transparency.

See Also:

setBackgroundImageAlpha(float)

setBackgroundImageAlpha

public void setBackgroundImageAlpha(float alpha)

Sets the alpha-transparency for the chart's background image. Registered listeners are notified that the chart has been changed.

Parameters:

alpha - the alpha value.

See Also:

getBackgroundImageAlpha()

isNotify

public boolean isNotify()

Returns a flag that controls whether or not change events are sent to registered listeners.

Returns:

A boolean.

See Also:

setNotify(boolean)

setNotify

public void setNotify(boolean notify)

Sets a flag that controls whether or not listeners receive ChartChangeEvent notifications.

Parameters:

notify - a boolean.

See Also:

isNotify()

draw

public void draw(java.awt.Graphics2D g2,
                 java.awt.geom.Rectangle2D area)

Draws the chart on a Java 2D graphics device (such as the screen or a printer).

This method is the focus of the entire JFreeChart library.

Specified by:

draw in interface org.jfree.ui.Drawable

Parameters:

g2 - the graphics device.

area - the area within which the chart should be drawn.

draw

public void draw(java.awt.Graphics2D g2,
                 java.awt.geom.Rectangle2D area,
                 ChartRenderingInfo info)

Draws the chart on a Java 2D graphics device (such as the screen or a printer). This method is the focus of the entire JFreeChart library.

Parameters:

g2 - the graphics device.

area - the area within which the chart should be drawn.

info - records info about the drawing (null means collect no info).

draw

public void draw(java.awt.Graphics2D g2,
                 java.awt.geom.Rectangle2D chartArea,
                 java.awt.geom.Point2D anchor,
                 ChartRenderingInfo info)

Draws the chart on a Java 2D graphics device (such as the screen or a printer).

This method is the focus of the entire JFreeChart library.

Parameters:

g2 - the graphics device.

chartArea - the area within which the chart should be drawn.

anchor - the anchor point (in Java2D space) for the chart (null permitted).

info - records info about the drawing (null means collect no info).

drawTitle

protected EntityCollection drawTitle(Title t,
                                     java.awt.Graphics2D g2,
                                     java.awt.geom.Rectangle2D area,
                                     boolean entities)

Draws a title. The title should be drawn at the top, bottom, left or right of the specified area, and the area should be updated to reflect the amount of space used by the title.

Parameters:

t - the title (null not permitted).

g2 - the graphics device (null not permitted).

area - the chart area, excluding any existing titles (null not permitted).

entities - a flag that controls whether or not an entity collection is returned for the title.

Returns:

An entity collection for the title (possibly null).

createBufferedImage

public java.awt.image.BufferedImage createBufferedImage(int width,
                                                        int height)

Creates and returns a buffered image into which the chart has been drawn.

Parameters:

width - the width.

height - the height.

Returns:

A buffered image.

createBufferedImage

public java.awt.image.BufferedImage createBufferedImage(int width,
                                                        int height,
                                                        ChartRenderingInfo info)

Creates and returns a buffered image into which the chart has been drawn.

Parameters:

width - the width.

height - the height.

info - carries back chart state information (null permitted).

Returns:

A buffered image.

createBufferedImage

public java.awt.image.BufferedImage createBufferedImage(int width,
                                                        int height,
                                                        int imageType,
                                                        ChartRenderingInfo info)

Creates and returns a buffered image into which the chart has been drawn.

Parameters:

width - the width.

height - the height.

imageType - the image type.

info - carries back chart state information (null permitted).

Returns:

A buffered image.

createBufferedImage

public java.awt.image.BufferedImage createBufferedImage(int imageWidth,
                                                        int imageHeight,
                                                        double drawWidth,
                                                        double drawHeight,
                                                        ChartRenderingInfo info)

Creates and returns a buffered image into which the chart has been drawn.

Parameters:

imageWidth - the image width.

imageHeight - the image height.

drawWidth - the width for drawing the chart (will be scaled to fit image).

drawHeight - the height for drawing the chart (will be scaled to fit image).

info - optional object for collection chart dimension and entity information.

Returns:

A buffered image.

handleClick

public void handleClick(int x,
                        int y,
                        ChartRenderingInfo info)

Handles a 'click' on the chart. JFreeChart is not a UI component, so some other object (for example, ChartPanel) needs to capture the click event and pass it onto the JFreeChart object. If you are not using JFreeChart in a client application, then this method is not required.

Parameters:

x - x-coordinate of the click (in Java2D space).

y - y-coordinate of the click (in Java2D space).

info - contains chart dimension and entity information (null not permitted).

addChangeListener

public void addChangeListener(ChartChangeListener listener)

Registers an object for notification of changes to the chart.

Parameters:

listener - the listener (null not permitted).

See Also:

removeChangeListener(ChartChangeListener)

removeChangeListener

public void removeChangeListener(ChartChangeListener listener)

Deregisters an object for notification of changes to the chart.

Parameters:

listener - the listener (null not permitted)

See Also:

addChangeListener(ChartChangeListener)

fireChartChanged

public void fireChartChanged()

Sends a default ChartChangeEvent to all registered listeners.

This method is for convenience only.

notifyListeners

protected void notifyListeners(ChartChangeEvent event)

Sends a ChartChangeEvent to all registered listeners.

Parameters:

event - information about the event that triggered the notification.

addProgressListener

public void addProgressListener(ChartProgressListener listener)

Registers an object for notification of progress events relating to the chart.

Parameters:

listener - the object being registered.

See Also:

removeProgressListener(ChartProgressListener)

removeProgressListener

public void removeProgressListener(ChartProgressListener listener)

Deregisters an object for notification of changes to the chart.

Parameters:

listener - the object being deregistered.

See Also:

addProgressListener(ChartProgressListener)

notifyListeners

protected void notifyListeners(ChartProgressEvent event)

Sends a ChartProgressEvent to all registered listeners.

Parameters:

event - information about the event that triggered the notification.

titleChanged

public void titleChanged(TitleChangeEvent event)

Receives notification that a chart title has changed, and passes this on to registered listeners.

Specified by:

titleChanged in interface TitleChangeListener

Parameters:

event - information about the chart title change.

plotChanged

public void plotChanged(PlotChangeEvent event)

Receives notification that the plot has changed, and passes this on to registered listeners.

Specified by:

plotChanged in interface PlotChangeListener

Parameters:

event - information about the plot change.

equals

public boolean equals(java.lang.Object obj)

Tests this chart for equality with another object.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

main

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

Prints information about JFreeChart to standard output.

Parameters:

args - no arguments are honored.

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Clones the object, and takes care of listeners. Note: caller shall register its own listeners on cloned graph.

Overrides:

clone in class java.lang.Object

Returns:

A clone.

Throws:

java.lang.CloneNotSupportedException - if the chart is not cloneable.