package com.akjava.gwt.lib.hangouts.client;
import java.util.ArrayList;
import java.util.List;
import com.akjava.gwt.lib.hangouts.client.events.ParticipantsChangedEvent;
import com.akjava.gwt.lib.hangouts.client.listeners.ParticipantsChangedListener;
public class OnParticipantsChanged {
private OnParticipantsChanged(){}
private static native void registListener()/*-{
$wnd.gapi.hangout.onParticipantsChanged.add(@com.akjava.gwt.lib.hangouts.client.OnParticipantsChanged::fireListener(Lcom/akjava/gwt/lib/hangouts/client/events/ParticipantsChangedEvent;));
}-*/;
private static native void unregistListener()/*-{
$wnd.gapi.hangout.onParticipantsChanged.remove(@com.akjava.gwt.lib.hangouts.client.OnParticipantsChanged::fireListener(Lcom/akjava/gwt/lib/hangouts/client/events/ParticipantsChangedEvent;));
}-*/;
public static void add(ParticipantsChangedListener listener){
if(listeners==null){
listeners=new ArrayList<ParticipantsChangedListener>();
listeners.add(listener);
registListener();
}else{
listeners.add(listener);
}
}
public static void remove(ParticipantsChangedListener listener){
if(listeners==null){
}else{
listeners.remove(listener);
if(listeners.size()==0){
unregistListener();
listeners=null;
}
}
}
private static List<ParticipantsChangedListener> listeners;
synchronized static void fireListener(ParticipantsChangedEvent event){
for(ParticipantsChangedListener listener:listeners){
listener.onParticipantsChanged(event);
}
}
}