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/*
*
* Copyright (C) 1999, Institute for MicroTherapy
*
* This software and supporting documentation were developed by
*
* University of Witten/Herdecke
* Department of Radiology and MicroTherapy
* Institute for MicroTherapy
* Medical computer science
*
* Universitaetsstrasse 142
* 44799 Bochum, Germany
*
* http://www.microtherapy.de/go/cs
* mailto:computer.science@microtherapy.de
*
* THIS SOFTWARE IS MADE AVAILABLE, AS IS, AND THE INSTITUTE MAKES NO
* WARRANTY REGARDING THE SOFTWARE, ITS PERFORMANCE, ITS MERCHANTABILITY
* OR FITNESS FOR ANY PARTICULAR USE, FREEDOM FROM ANY COMPUTER DISEASES
* OR ITS CONFORMITY TO ANY SPECIFICATION. THE ENTIRE RISK AS TO QUALITY
* AND PERFORMANCE OF THE SOFTWARE IS WITH THE USER.
*
* Author : $Author: kleber $
* Last update : $Date: 2001/06/06 10:32:30 $
* Revision : $Revision: 1.1.1.1 $
* State: $State: Exp $
*/
package main;
import java.util.*;
import javax.swing.event.*;
/**
* The class Controller provides an event-based communication in
* an application. Parts of the application can add itself to this
* server to recieve incoming events. Those parts must implement the
* "Listener"-interface.
* Do add a listener you may use the following commands:
*
* class SomeListener implements Listener
* {
* public SomeListener()
* {
* Controller es = Controller.instance().addMainListener(this);
* }
*
* public boolean processEvent (JiveEvent e)
* {
* if (e instanceof MySpecialEvent) doSomething();
* return true;
* }
* }
*/
public class Controller
{
// Singleton Pattern:
/** The one and only instance is stored here. */
private static Controller theInstance = null;
protected EventListenerList listenrList ;
/**
* The Constructor of this class. The one-and-only object of
* this class can be created (or retrieved) with this method.
*
* @return an instance of this class.
*/
public static Controller instance()
{
if (theInstance == null) theInstance = new Controller();
return theInstance;
}
/**
* The internal constructor of this class. Don't call direct.
*/
protected Controller ()
{
// do not instanciate this way!
listenrList = new EventListenerList();
}
public void addMainListener(MainListener l)
{
listenrList.add(MainListener.class, l);
}
public void addGuiComponentListener(GuiComponentListener l)
{
listenrList.add(GuiComponentListener.class, l);
}
public void removeGuiComponentListener(GuiComponentListener l)
{
listenrList.remove(GuiComponentListener.class, l);
}
public void addStatusListener(StatusListener l)
{
listenrList.add(StatusListener.class, l);
}
public void removeStatusListener(StatusListener l)
{
listenrList.remove(StatusListener.class, l);
}
public void addPrintListener(PrintListener l)
{
listenrList.add(PrintListener.class, l);
}
public void removePrintListener(PrintListener l)
{
listenrList.remove(PrintListener.class, l);
}
// Notify all listeners that have registered interest for
// notification on this event type. The event instance
// is lazily created using the parameters passed into
// the fire method.
public void fireEvent(DSEvent e)
{
// Guaranteed to return a non-null array
Object[] listeners = listenrList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2)
{
if (listeners[i]==MainListener.class)
{
// Lazily create the event:
//if (jiveMessage == null) fooEvent = new FooEvent(this);
((MainListener)listeners[i+1]).processEvent(e);
}
}
}
// Notify all listeners that have registered interest for
// notification on this event type. The event instance
// is lazily created using the parameters passed into
// the fire method.
public void fireNotification(DSEvent e)
{
// Guaranteed to return a non-null array
Object[] listeners = listenrList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2)
{
if (listeners[i]==GuiComponentListener.class)
{
// Lazily create the event:
//if (jiveMessage == null) fooEvent = new FooEvent(this);
((GuiComponentListener)listeners[i+1]).processComponents(e);
}
}
}
// Notify all listeners that have registered interest for
// notification on this event type. The event instance
// is lazily created using the parameters passed into
// the fire method.
public void fireStatus(DSEvent e)
{
// Guaranteed to return a non-null array
Object[] listeners = listenrList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2)
{
if (listeners[i]==StatusListener.class)
{
// Lazily create the event:
//if (jiveMessage == null) fooEvent = new FooEvent(this);
((StatusListener)listeners[i+1]).processStatus(e);
}
}
}
// Notify all listeners that have registered interest for
// notification on this event type. The event instance
// is lazily created using the parameters passed into
// the fire method.
public void firePrint(DSEvent e)
{
// Guaranteed to return a non-null array
Object[] listeners = listenrList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2)
{
if (listeners[i]==PrintListener.class)
{
// Lazily create the event:
//if (jiveMessage == null) fooEvent = new FooEvent(this);
((PrintListener)listeners[i+1]).processPrint(e);
}
}
}
}
/*
* CVS Log
* $Log: Controller.java,v $
* Revision 1.1.1.1 2001/06/06 10:32:30 kleber
* Init commit for DICOMscope 3.5
* Create new CVS
*
*/
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