|
import javax.swing.JComboBox;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
public class Main {
public static void main(String[] argv) throws Exception {
String[] items = { "item1", "item2" };
JComboBox cb = new JComboBox(items);
cb.setEditable(true);
MyPopupMenuListener actionListener = new MyPopupMenuListener();
cb.addPopupMenuListener(actionListener);
}
}
class MyPopupMenuListener implements PopupMenuListener {
public void popupMenuWillBecomeVisible(PopupMenuEvent evt) {
JComboBox cb = (JComboBox) evt.getSource();
}
public void popupMenuWillBecomeInvisible(PopupMenuEvent evt) {
JComboBox cb = (JComboBox) evt.getSource();
}
public void popupMenuCanceled(PopupMenuEvent evt) {
JComboBox cb = (JComboBox) evt.getSource();
}
}
|
