source: exampleparties/humangui/src/main/java/geniusweb/exampleparties/humangui/MyGUI.java@ 52

package geniusweb.exampleparties.humangui;

import java.awt.BorderLayout;
import java.util.LinkedList;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.TableCellEditor;

import geniusweb.actions.Accept;
import geniusweb.actions.EndNegotiation;
import geniusweb.actions.Offer;
import geniusweb.issuevalue.Value;
import geniusweb.profile.Profile;

/**
 * the human GUI panel
 *
 */
@SuppressWarnings("serial")
public class MyGUI extends JPanel {

        // not static because buttons are mutable (have listeners)
        private final JButton acceptButton = new JButton("Accept");
        private final JButton offerButton = new JButton("Place Offer");
        private final JButton stopButton = new JButton("Stop Negotiation");
        private final BiddingInfo info;

        public MyGUI(BiddingInfo biddinginfo) {
                if (biddinginfo == null)
                        throw new NullPointerException("biddinginfo=null");
                this.info = biddinginfo;
                setLayout(new BorderLayout());
                JTable table = new JTable(new BiddingTableModel(info)) {
                        @Override
                        public TableCellEditor getCellEditor(int row, int col) {
                                if (row < 0 || row > info.getIssues().size())
                                        return null;
                                String issue = info.getIssues().get(row);
                                LinkedList<Value> values = new LinkedList<Value>();
                                info.getProfile().getDomain().getValues(issue)
                                                .forEach(v -> values.add(v));
                                return new DefaultCellEditor(new JComboBox<>(values.toArray()));
                        }
                };
                JScrollPane tablecontainer = new JScrollPane(table);
                add(tablecontainer, BorderLayout.CENTER);

                JPanel buttonPane = new JPanel();
                buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
                buttonPane.add(Box.createHorizontalGlue());
                buttonPane.add(offerButton);
                buttonPane.add(acceptButton);
                buttonPane.add(stopButton);
                add(buttonPane, BorderLayout.SOUTH);

                biddinginfo.addListener(data -> updateGui(data));
                acceptButton.addActionListener(e -> accept());
                offerButton.addActionListener(e -> offer());
                stopButton.addActionListener(e -> stop());
                updateGui(false);
        }

        private void offer() {
                info.doAction(new Offer(info.getMyId(), info.getCurrentBid()));
        }

        private void accept() {
                info.doAction(
                                new Accept(info.getMyId(), info.getReceivedOffer().getBid()));
        }

        private void stop() {
                info.doAction(new EndNegotiation(info.getMyId()));
        }

        /**
         * Update visibility of the buttons when changes occur in model
         */
        private void updateGui(Object change) {
                if (change instanceof Boolean) {
                        // boolean contains isMyTurn
                        Boolean isEnabled = (Boolean) change;
                        SwingUtilities.invokeLater(new Runnable() {
                                @Override
                                public void run() {
                                        offerButton.setEnabled(isEnabled);
                                        stopButton.setEnabled(isEnabled);
                                        acceptButton.setEnabled(
                                                        isEnabled && info.getReceivedOffer() != null);
                                }
                        });
                } else if (change instanceof Profile) {
                        JOptionPane.showMessageDialog(this,
                                        "Notice, your preference profile has been changed!");
                }
        }

}