PopupMenuListener event on JComboBox fires multiple times per selection
// webAddressBox IS OF TYPE javax.swing.JComboBox
webAddressBox.addPopupMenuListener(new PopupMenuAdapter(){
/** @uses {@link com.ppowell.tools.ObjectTools.SimpleBrowser.Surf} */
final Surf surf =new Surf(webAddressBox.getSelectedItem().toString());
/**
* Perform {@link #surf} processing
* @param evt {@link javax.swing.event.PopupMenuEvent}
*/
publicvoid popupMenuWillBecomeInvisible(PopupMenuEvent evt){
System.out.println("you selected:");
surf.doURLProcessing();
}
});
/*
* PopupMenuAdapter.java
*
* Created on February 16, 2007, 11:53 AM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package com.ppowell.tools.ObjectTools.SwingTools;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
/**
* Will allow for greater flexibility by implementing {@link javax.swing.event.PopupMenuListener}
* @author Phil Powell
* @version JDK 1.6.0
*/
publicabstractclass PopupMenuAdapterimplements PopupMenuListener{
/** Creates a new instance of PopupMenuAdapter */
public PopupMenuAdapter(){}
/**
* Overrides {@link javax.swing.event.PopupMenuListener} method popupMenuCanceled
* @param evt {@link javax.swing.event.PopupMenuEvent}
*/
publicvoid popupMenuCanceled(PopupMenuEvent evt){}
/**
* Overrides {@link javax.swing.event.PopupMenuListener} method popupMenuWillBecomeInvisible
* @param evt {@link javax.swing.event.PopupMenuEvent}
*/
publicvoid popupMenuWillBecomeInvisible(PopupMenuEvent evt){}
/**
* Overrides {@link javax.swing.event.PopupMenuListener} method popupMenuWillBecomeVisible
* @param evt {@link javax.swing.event.PopupMenuEvent}
*/
publicvoid popupMenuWillBecomeVisible(PopupMenuEvent evt){}
}
This code is supposed to handle a single selection from a JComboBox webAddressBox. The front-end functionality of this code blocks works just fine to the user, however, upon viewing the "behind the scenes action", I noticed that the overriden popupMenuWillBecomeInvisible() method within the anonymous inner class instance of PopupAdapter is being called 2 times upon the first time you select something from webAddressBox, 4 times the next time you select something, 8 times the next time, and so on..
Obviously this is a tremendous waste of resources to have it call that many times exponentially - it should only call once each time you select something from webAddressBox, but I can't figure out how to get that to happen.
What suggestions might you have to accomplish this? I already have an ActionListener that runs separately from PopupMenuAdapter that handles the user either clicking a JButton or hitting ENTER - this works just fine.
Thanx
Phil
