Android Open Source - DragonGoApp Event Manager

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Back to project page DragonGoApp.

License

The source code is released under:

GNU General Public License

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Java Source Code

package fr.xtof54.jsgo;
//from ww w .ja va 2s  .  c  o m
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * This class is used to receive and dispatch events
 * 
 * @author xtof
 *
 */
public class EventManager {
  enum eventType {loginStarted, loginEnd, downloadListStarted, downloadListEnd, downloadListGamesEnd, downloadGameStarted, downloadGameEnd, GameOK, moveSentStart, moveSentEnd, gobanReady,
    msgSendStart, msgSendEnd, ladderStart, ladderEnd, ladderChallengeStart, ladderChallengeEnd, showMessage, copyEidogoStart, copyEidogoEnd};
  
  private static EventManager em = new EventManager();
  public static EventManager getEventManager() {
    return em;
  }
  private EventManager() {}
  
  public interface EventListener {
    public void reactToEvent();
    public String getName();
  }
  private HashMap<eventType, List<EventListener>> listeners = new HashMap<EventManager.eventType, List<EventListener>>();
  
  public void registerListener(eventType e, EventListener f) {
      System.out.println("registering event listener "+e+" "+f.getName());
    List<EventListener> l = listeners.get(e);
    final String name = f.getName();
    if (l==null) {
      l=new ArrayList<EventManager.EventListener>();
      listeners.put(e, l);
    } else {
        for (EventListener el : l)
            if (el.getName().equals(name)) {
                System.out.println("refusing event "+el.getName());
                // refuse to register 2 times the same listener !
                return;
            }
    }
    l.add(f);
  }
  public void unregisterListener(eventType e, EventListener f) {
        System.out.println("unregistering event listener "+e+" "+f.getName());
    List<EventListener> l = listeners.get(e);
    if (l!=null) {
      l.remove(f);
      if (l.size()==0) listeners.remove(e);
    }
  }
  
  public String message=null;
    public void sendEvent(final eventType e, String msg) {
        message=""+msg;
        sendEvent(e);
    }
  public void sendEvent(final eventType e) {
    Thread tt = new Thread(new Runnable() {
      @Override
      public void run() {
        List<EventListener> l = listeners.get(e);
        System.out.println("Event sent: "+e+" "+l);
        if (l!=null) {
            // make a copy of the listeners list to avoid concurrent modification of the original list
            ArrayList<EventListener> list = new ArrayList<EventManager.EventListener>();
            list.addAll(l);
                for (EventListener f : list)
                    f.reactToEvent();
        }
      }
    });
    tt.start();
  }
}

Java Source Code List