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
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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 defaultChartChangeEvent
to all registered listeners.protected void
notifyListeners(OverlayChangeEvent event)
Sends aChartChangeEvent
to all registered listeners.void
removeChangeListener(OverlayChangeListener listener)
Deregisters an object for notification of changes to the overlay.
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Constructor Details
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AbstractOverlay
public AbstractOverlay()Default constructor.
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Method Details
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addChangeListener
Registers an object for notification of changes to the overlay.- Parameters:
listener
- the listener (null
not permitted).- See Also:
removeChangeListener(OverlayChangeListener)
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removeChangeListener
Deregisters an object for notification of changes to the overlay.- Parameters:
listener
- the listener (null
not permitted)- See Also:
addChangeListener(OverlayChangeListener)
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fireOverlayChanged
Sends a defaultChartChangeEvent
to all registered listeners.This method is for convenience only.
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notifyListeners
Sends aChartChangeEvent
to all registered listeners.- Parameters:
event
- information about the event that triggered the notification.
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