org.jfree.chart.panel
Class AbstractOverlay

java.lang.Object
  org.jfree.chart.panel.AbstractOverlay

Direct Known Subclasses:

CrosshairOverlay

public class AbstractOverlay
extends java.lang.Object

A base class for implementing overlays for a ChartPanel.

Since:

1.0.13

Constructor Summary

AbstractOverlay()
Default constructor.

Method Summary

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 Detail

AbstractOverlay

public AbstractOverlay()

Default constructor.

Method Detail

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.