src/be/nikiroo/fanfix_swing/gui/utils/ListenerPanel.java

   1 package be.nikiroo.fanfix_swing.gui.utils;
   2
   3 import java.awt.event.ActionEvent;
   4 import java.awt.event.ActionListener;
   5
   6 import javax.swing.JPanel;
   7
   8 import be.nikiroo.fanfix_swing.gui.SearchBar;
   9
  10 /**
  11  * A {@link JPanel} with the default {@link ActionListener} add/remove/fire
  12  * methods.
  13  *
  14  * @author niki
  15  */
  16 public class ListenerPanel extends JPanel {
  17         private static final long serialVersionUID = 1L;
  18
  19         /**
  20          * Adds the specified action listener to receive action events from this
  21          * {@link SearchBar}.
  22          *
  23          * @param listener the action listener to be added
  24          */
  25         public synchronized void addActionListener(ActionListener listener) {
  26                 listenerList.add(ActionListener.class, listener);
  27         }
  28
  29         /**
  30          * Removes the specified action listener so that it no longer receives action
  31          * events from this {@link SearchBar}.
  32          *
  33          * @param listener the action listener to be removed
  34          */
  35         public synchronized void removeActionListener(ActionListener listener) {
  36                 listenerList.remove(ActionListener.class, listener);
  37         }
  38
  39         /**
  40          * Notify the listeners of an action.
  41          *
  42          * @param listenerCommand A string that may specify a command (possibly one of
  43          *                        several) associated with the event
  44          */
  45         protected void fireActionPerformed(String listenerCommand) {
  46                 ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, listenerCommand);
  47                 Object[] listeners = listenerList.getListenerList();
  48                 for (int i = listeners.length - 2; i >= 0; i -= 2) {
  49                         if (listeners[i] == ActionListener.class) {
  50                                 ((ActionListener) listeners[i + 1]).actionPerformed(e);
  51                         }
  52                 }
  53         }
  54 }