Module platform

Package org.jfree.chart.panel

Class AbstractOverlay

java.lang.Object

org.jfree.chart.panel.AbstractOverlay

Direct Known Subclasses:

CrosshairOverlay

public class AbstractOverlay
extends Object

A base class for implementing overlays for a ChartPanel.

Constructor Summary

Constructors

Constructor	Description
AbstractOverlay()	Default constructor.

Method Summary

Modifier and Type	Method	Description
void	addChangeListener(OverlayChangeListener listener)	Registers an object for notification of changes to the overlay.
void	fireOverlayChanged()	Sends a default ChartChangeEvent to all registered listeners.
protected void	notifyListeners(OverlayChangeEvent event)	Sends a ChartChangeEvent to all registered listeners.
void	removeChangeListener(OverlayChangeListener listener)	Deregisters an object for notification of changes to the overlay.

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractOverlay

public AbstractOverlay()

Default constructor.

Method Details

addChangeListener

public void addChangeListener(OverlayChangeListener listener)

Registers an object for notification of changes to the overlay.

Parameters:

listener - the listener (null not permitted).

See Also:

• removeChangeListener(OverlayChangeListener)

removeChangeListener

public void removeChangeListener(OverlayChangeListener listener)

Deregisters an object for notification of changes to the overlay.

Parameters:

listener - the listener (null not permitted)

See Also:

• addChangeListener(OverlayChangeListener)

fireOverlayChanged

public void fireOverlayChanged()

Sends a default ChartChangeEvent to all registered listeners.

This method is for convenience only.

notifyListeners

protected void notifyListeners(OverlayChangeEvent event)

Sends a ChartChangeEvent to all registered listeners.

Parameters:

event - information about the event that triggered the notification.