## org.jfree.chart.event
Interface OverlayChangeListener

All Superinterfaces:
  java.util.EventListener

All Known Implementing Classes:
  ChartPanel, PolarChartPanel

    public interface OverlayChangeListener

extends java.util.EventListener

A listener for changes to an `Overlay`.

Since:
  1.0.13

Method Summary
`void` `overlayChanged(OverlayChangeEvent event)` This method is called to notify a listener of a change event.

Method Detail

### overlayChanged

    void overlayChanged(OverlayChangeEvent event)

  This method is called to notify a listener of a change event.

  Parameters:
    `event` - the event.