Swing Hacks

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Chapter 12, Miscellany

#98 Add Velocity for Dynamic HTML

HACK

out.writeObject(me.getComponent().getName( ));

out.writeObject(evt);

}

You also need to modify the

openReceiver( )

method’s loop to read a name

in before reading in an event. Once you have the name on the receiving side,

you can look up the proper component and associate that with the received

event.

With these changes in place, the program will work. Each event on the send-

ing instance side will be captured and sent over the network. On the receiv-

ing side, each event will be recreated and reposted. The two programs will

stay completely in sync; even rollover effects will happen simultaneously:

while(true ) {

String name = (String) in.readObject( );

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

if(evt instanceof MouseEvent) {

MouseEvent me = (MouseEvent)evt;

MouseEvent me2 = new MouseEvent(

//me.getComponent( ),

(Component)component_map.get(name),

me.getID( ),

me.getWhen( ),

me.getModifiers( ),

me.getX( ),

me.getY( ),

me.getClickCount( ),

me.isPopupTrigger( ),

me.getButton( )

);

eq.postEvent(me2);

}

}

H A C K

#98

Add Velocity for Dynamic HTML Hack #98

Use the Velocity template engine to mimic server-side web technologies in

your Swing application.

Servlets, JSPs, and other server-side technologies help separate an applica-

tion’s model from its view and allow you to build flexible and dynamic web

applications. Of course, Swing applications have their own benefits, like fast

user interaction without the need for web server communication. It would

be cool to have the power of those server-side technologies right in your

Swing application, but without the overhead of a local web server. You can

actually mimic a lot of that functionality using a combination of Apache’s

Velocity template engine and a Swing HTML panel.