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// $Id$
//
// = FILENAME
// DemoCore.java
//
// = AUTHOR
// Michael Kircher (mk1@cs.wustl.edu)
//
// = DESCRIPTION
// This class servers as the core class of the simulation demo.
// It connects the push consumer of the event service with
// one or several Java Beans.
//
// ============================================================================
import java.awt.*;
import java.awt.event.*;
public class DemoCore extends Frame {
private static final int MAX_VIS_COMPS = 10;
private PushConsumerFactory pushConsumerFactory_;
private VisCompFactory visCompFactory_;
private DataHandler dataHandler_;
private java.util.Vector vis_comp_list_;
private int countVisComp_ = 0;
private GridBagLayout gridbag_;
private GridBagConstraints constraints_;
DemoCore (String nameServiceIOR, java.applet.Applet applet) {
super ();
setSize (600,400);
setBounds (new Rectangle (50,50,800,500));
setVisible (true);
gridbag_ = new GridBagLayout();
constraints_ = new GridBagConstraints();
constraints_.fill = GridBagConstraints.BOTH;
constraints_.weightx = 1.0;
constraints_.weighty = 1.0;
this.setLayout (gridbag_);
// Instantiate the DataHandler and the PushConsumer
dataHandler_ = new NavWeapDataHandler ();
pushConsumerFactory_ = new PushConsumerFactory (dataHandler_, nameServiceIOR, applet);
// List of Visualization Components
vis_comp_list_ = new java.util.Vector();
MenuBar menubar_ = new MenuBar ();
Menu menu_ = new Menu ("File");
MenuItem menu_quit_item_ = new MenuItem ("Quit");
menu_quit_item_.setEnabled (true);
MenuItem menu_add_item_ = new MenuItem ("Add");
menu_add_item_.setEnabled (true);
menu_.add (menu_add_item_);
menu_.add (menu_quit_item_);
menubar_.add (menu_);
setMenuBar (menubar_);
menu_quit_item_.addActionListener (new ActionListener ()
{
public void actionPerformed (ActionEvent e) {
System.exit (0);
}
});
menu_add_item_.addActionListener (new ActionListener ()
{
public void actionPerformed (ActionEvent e) {
ObservablesDialog obsDialog_ =
new ObservablesDialog (DemoCore.this,
dataHandler_.getObservablesList());
obsDialog_.addAnswerListener (new AnswerListener ()
{
public void ok (AnswerEvent e)
{
DemoCore.this.addConnection (e.selected_);
}
});
obsDialog_.setVisible (true);
}
});
// instantiate the Factory for Visualization Components
visCompFactory_ = new VisCompFactory ();
// in here the factory is needed
addConnection ("Cpu_UsageObservable");
}
public boolean addConnection (String selected) {
// to not fill too many into it
if (countVisComp_ < MAX_VIS_COMPS) {
// get a reference to the Observable
DemoObservable observable_ = dataHandler_.getObservable (selected);
if (observable_ != null) {
VisComp visComp_ = visCompFactory_.getNewVisComp (observable_.getProperty (), selected);
if (visComp_ != null) {
vis_comp_list_.addElement (visComp_);
// connect the Observer with the Observable
observable_.addObserver (visComp_);
countVisComp_++;
// not more than three in a row
if (countVisComp_ == 3){
constraints_.gridwidth = GridBagConstraints.REMAINDER;
}
if (countVisComp_ > 3) {
constraints_.gridwidth = 1;
}
gridbag_.setConstraints ((java.awt.Component) visComp_, constraints_);
// add the Visualization Component to the Frame
DemoCore.this.add ((java.awt.Component) visComp_);
DemoCore.this.show ();
return true;
}
}
}
return false;
}
public void init () {
}
public void paint (Graphics g)
{
}
public void run () {
// Wait passive until events come in
pushConsumerFactory_.run ();
}
}
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