networksettingsdialog.java

利用BlueJ开发的一个类似小时候完的吃豆豆的小游戏

/*
 * NetworkSettingsDialog.java
 *
 * Created on October 29, 2003, 9:08 AM
 */

package cs101.awt;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.swing.JOptionPane;

/**
 * A dialog box that will allow the user to select wether the program should
 * run in standalone mode, client mode or server mode. It is typically
 * displayed before the program does anything, and in some cases it may be the
 * first window that the user sees. This class is partly
 * based on a similar class written by Ben Vandiver in March 2003, but has
 * been entirely re-coded from scratch.
 *
 * @author  Patrick G. Heck ([e-mail])
 * @version $Id: NetworkSettingsDialog.java,v 1.2 2003/10/29 17:04:11 gus Exp $
 */
public class NetworkSettingsDialog extends javax.swing.JDialog {
    
    /** Run in standalone mode */
    public static final int NETWORK_NONE =   0;
    
    /** Run as a client */
    public static final int NETWORK_CLIENT = 1;
    
    /** Run as a server */
    public static final int NETWORK_SERVER = 2;
    
    // default state is standalone
    private int mode = NETWORK_NONE;
    
    // toggles debugging output
    private static boolean debug;
    
    /** 
     * Creates new form NetworkSettingsDialog. 
     *
     * @param parent The parent frame, or null if this dialog applies
     *               to the entire application, not just one frame.
     * @param modal  If true, and parent is null, the entire application
     *               will block until ok is pressed. If true and parent 
     *               is defined, then only the parent window will be blocked.
     *               If false, no blocking will occur.
     */
    public NetworkSettingsDialog(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;

        modeButtons = new javax.swing.ButtonGroup();
        jLabel3 = new javax.swing.JLabel();
        jPanel1 = new javax.swing.JPanel();
        leftPanel = new javax.swing.JPanel();
        standaloneRadioButton = new javax.swing.JRadioButton();
        clientRadioButton = new javax.swing.JRadioButton();
        serverRadioButton = new javax.swing.JRadioButton();
        jPanel3 = new javax.swing.JPanel();
        hostLabel = new javax.swing.JLabel();
        hostTextField = new javax.swing.JTextField();
        portLabel = new javax.swing.JLabel();
        portTextField = new javax.swing.JTextField();
        okButton = new javax.swing.JButton();

        jLabel3.setText("jLabel3");

        setTitle("Network Settings");
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                closeDialog(evt);
            }
        });

        jPanel1.setLayout(new java.awt.GridBagLayout());

        jPanel1.setBorder(new javax.swing.border.EmptyBorder(new java.awt.Insets(10, 10, 10, 10)));
        leftPanel.setLayout(new javax.swing.BoxLayout(leftPanel, javax.swing.BoxLayout.Y_AXIS));

        leftPanel.setBorder(new javax.swing.border.TitledBorder("Mode"));
        standaloneRadioButton.setText(" Standalone");
        standaloneRadioButton.setToolTipText("Run with no network features enabled");
        modeButtons.add(standaloneRadioButton);
        standaloneRadioButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                standaloneRadioButtonActionPerformed(evt);
            }
        });

        leftPanel.add(standaloneRadioButton);

        clientRadioButton.setText("Client");
        clientRadioButton.setToolTipText("Run as a networked client");
        modeButtons.add(clientRadioButton);
        clientRadioButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clientRadioButtonActionPerformed(evt);
            }
        });

        leftPanel.add(clientRadioButton);

        serverRadioButton.setText("Server");
        serverRadioButton.setToolTipText("Run as a networked server");
        modeButtons.add(serverRadioButton);
        serverRadioButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                serverRadioButtonActionPerformed(evt);
            }
        });

        leftPanel.add(serverRadioButton);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        jPanel1.add(leftPanel, gridBagConstraints);

        jPanel3.setLayout(new java.awt.GridBagLayout());

        hostLabel.setText("Host:");
        hostLabel.setToolTipText("The host to connect to");
        hostLabel.setEnabled(false);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel3.add(hostLabel, gridBagConstraints);

        hostTextField.setText("localhost");
        hostTextField.setToolTipText("Enter the host name here");
        hostTextField.setPreferredSize(new java.awt.Dimension(100, 19));
        hostTextField.setEnabled(false);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel3.add(hostTextField, gridBagConstraints);

        portLabel.setText("Port:");
        portLabel.setToolTipText("The port to listen on or connect to");
        portLabel.setEnabled(false);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel3.add(portLabel, gridBagConstraints);

        portTextField.setText("4321");
        portTextField.setToolTipText("Enter the port number here");
        portTextField.setPreferredSize(new java.awt.Dimension(100, 19));
        portTextField.setEnabled(false);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel3.add(portTextField, gridBagConstraints);

        okButton.setText("OK");
        okButton.setMargin(new java.awt.Insets(2, 28, 2, 28));
        okButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                okButtonActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridwidth = 2;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel3.add(okButton, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(0, 5, 0, 0);
        jPanel1.add(jPanel3, gridBagConstraints);

        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);

        pack();
    }//GEN-END:initComponents
    
    private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okButtonActionPerformed
        // Add your handling code here:
        if (!validateInput()) return;
        this.hide();
        System.out.println("getMode() will return: " + getMode());
        if (debug) {
            try {
                System.out.println("getHost() will return: "+ getHost());
            } catch (RuntimeException re) {
                System.out.println("getHost() will throw " + re);
            }
            try {
                System.out.println("getPort() will return: " + getPort());
            } catch (RuntimeException re) {
                System.out.println("getPort() will throw " + re);
            }
        }
    }//GEN-LAST:event_okButtonActionPerformed
    
    private void standaloneRadioButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_standaloneRadioButtonActionPerformed
        // Add your handling code here:
        mode = NETWORK_NONE;
        hostLabel.setEnabled(false);
        hostTextField.setEnabled(false);
        portLabel.setEnabled(false);
        portTextField.setEnabled(false);
        
    }//GEN-LAST:event_standaloneRadioButtonActionPerformed
    
    private void clientRadioButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_clientRadioButtonActionPerformed
        // Add your handling code here:
        mode = NETWORK_CLIENT;
        hostLabel.setEnabled(true);
        hostTextField.setEnabled(true);
        portLabel.setEnabled(true);
        portTextField.setEnabled(true);
        
    }//GEN-LAST:event_clientRadioButtonActionPerformed
    
    private void serverRadioButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_serverRadioButtonActionPerformed
        // Add your handling code here:
        mode = NETWORK_SERVER;
        hostLabel.setEnabled(false);
        hostTextField.setEnabled(false);
        portLabel.setEnabled(true);
        portTextField.setEnabled(true);
        
    }//GEN-LAST:event_serverRadioButtonActionPerformed
    
    /** Closes the dialog */
    private void closeDialog(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_closeDialog
        setVisible(false);
        dispose();
    }//GEN-LAST:event_closeDialog
    
    private boolean validateInput() {
        try {
            if (this.mode == NETWORK_CLIENT) {
                Integer.parseInt(portTextField.getText());
                InetAddress.getByName(hostTextField.getText());
            } else if (this.mode == NETWORK_SERVER)
                Integer.parseInt(portTextField.getText());
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(this,"Non-numeric value for port!");
            return false;
        } catch (UnknownHostException e) {
            JOptionPane.showMessageDialog(this,"Unknown host: " + hostTextField.getText());
            return false;
        }
        return true;
    }
    /**
     * Returns the requested state of network connectivity
     *
     * @return An integer constant drawn from NETWORK_NONE,
     * NETWORK_CLIENT, or NETWORK_SERVER.
     */
    public int getMode() {
        return this.mode;
    }
    
    /**
     * returns the requested port.  The text box the value is drawn from
     * depends on the state.
     *
     * @return port number to serve on / connect to.
     * @throws RuntimeException if the state was NETWORK_NONE.
     */
    public int getPort() {
        if (mode == NETWORK_NONE) {
            throw new RuntimeException("Invalid Network settings for getPort()");
        }
        return Integer.parseInt(portTextField.getText());
    }
    
    /**
     * returns the name of the host to connect to as a client.
     *
     * @return String name of host to connect to.
     * @throws RuntimeException if the state was not NETWORK_CLIENT.
     */
    public String getHost() {
        if (this.mode == NETWORK_CLIENT)
            return this.hostTextField.getText();
        else
            throw new RuntimeException("Invalid Network settings for getHost()");
    }
    
    /**
     * Main method for visual layout inspection.
     *
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        debug = true;
        NetworkSettingsDialog d = 
        new NetworkSettingsDialog(new javax.swing.JFrame(), true);
        
        d.show();
        System.exit(0);
    }
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JRadioButton clientRadioButton;
    private javax.swing.JLabel hostLabel;
    private javax.swing.JTextField hostTextField;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel leftPanel;
    private javax.swing.ButtonGroup modeButtons;
    private javax.swing.JButton okButton;
    private javax.swing.JLabel portLabel;
    private javax.swing.JTextField portTextField;
    private javax.swing.JRadioButton serverRadioButton;
    private javax.swing.JRadioButton standaloneRadioButton;
    // End of variables declaration//GEN-END:variables
    
}

/*
 * $Log: NetworkSettingsDialog.java,v $
 * Revision 1.2  2003/10/29 17:04:11  gus
 * add a title to the dialog
 *
 * Revision 1.1  2003/10/29 15:55:50  gus
 * An initial version of a rewrite of the network settings dialog from breakout
 * spring 2003.
 *
 */