Swing Hacks

Mirror an Application #97

Chapter 12, Miscellany

|

489

HACK

AWTEvent.ACTION_EVENT_MASK |

AWTEvent.MOUSE_EVENT_MASK

);

}

First,

openSender( )

creates a new

ObjectOutputStream

around the socket’s

output stream. Next, it creates a new

AWTEventListener

that takes each event

and tests if it is a mouse event; if so, this method writes it to the output

stream. Notice that the second argument of

addAWTEventListener( ) is two

event masks ORed together (using the

| operator).

Receive Mouse Events

Receiving events is the reverse of sending them. You must open a server

socket for the (sending) instance to connect to, and then pull the events off

of the network one by one and repost them to the system event queue:

public void openReceiver( ) throws Exception {

// receive events

ServerSocket server = new ServerSocket(6754);

Socket sock = server.accept( );

EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue( );

ObjectInputStream in = new ObjectInputStream(sock.getInputStream( ));

while(true ) {

AWTEvent evt = (AWTEvent) in.readObject( );

if(evt instanceof MouseEvent) {

MouseEvent me = (MouseEvent)evt;

MouseEvent me2 = new MouseEvent(

me.getComponent( ),

me.getID( ),

me.getWhen( ),

me.getModifiers( ),

me.getX( ),

me.getY( ),

me.getClickCount( ),

me.isPopupTrigger( ),

me.getButton( )

);

eq.postEvent(me2);

}

}

}

Notice that the events are not posted directly to the event queue. Since the

objects really belong ...