Choose a port, any port!
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Enumeration;
import java.util.HashMap;
import javax.comm.CommPortIdentifier;
import javax.comm.SerialPort;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* Choose a port, any port!
*
* Java Communications is a "standard extention" and must be downloaded and
* installed separately from the JDK before you can even compile this program.
*
* @author Ian F. Darwin, http://www.darwinsys.com/
* @version $Id: PortChooser.java,v 1.9 2004/04/11 23:50:40 ian Exp $
*/
public class PortChooser extends JDialog implements ItemListener {
/** A mapping from names to CommPortIdentifiers. */
protected HashMap map = new HashMap();
/** The name of the choice the user made. */
protected String selectedPortName;
/** The CommPortIdentifier the user chose. */
protected CommPortIdentifier selectedPortIdentifier;
/** The JComboBox for serial ports */
protected JComboBox serialPortsChoice;
/** The JComboBox for parallel ports */
protected JComboBox parallelPortsChoice;
/** The JComboBox for anything else */
protected JComboBox other;
/** The SerialPort object */
protected SerialPort ttya;
/** To display the chosen */
protected JLabel choice;
/** Padding in the GUI */
protected final int PAD = 5;
/**
* This will be called from either of the JComboBoxen when the user selects
* any given item.
*/
public void itemStateChanged(ItemEvent e) {
// Get the name
selectedPortName = (String) ((JComboBox) e.getSource())
.getSelectedItem();
// Get the given CommPortIdentifier
selectedPortIdentifier = (CommPortIdentifier) map.get(selectedPortName);
// Display the name.
choice.setText(selectedPortName);
}
/* The public "getter" to retrieve the chosen port by name. */
public String getSelectedName() {
return selectedPortName;
}
/* The public "getter" to retrieve the selection by CommPortIdentifier. */
public CommPortIdentifier getSelectedIdentifier() {
return selectedPortIdentifier;
}
/** A test program to show up this chooser. */
public static void main(String[] ap) {
PortChooser c = new PortChooser(null);
c.setVisible(true); // blocking wait
System.out.println("You chose " + c.getSelectedName() + " (known by "
+ c.getSelectedIdentifier() + ").");
System.exit(0);
}
/**
* Construct a PortChooser --make the GUI and populate the ComboBoxes.
*/
public PortChooser(JFrame parent) {
super(parent, "Port Chooser", true);
makeGUI();
populate();
finishGUI();
}
/**
* Build the GUI. You can ignore this for now if you have not yet worked
* through the GUI chapter. Your mileage may vary.
*/
protected void makeGUI() {
Container cp = getContentPane();
JPanel centerPanel = new JPanel();
cp.add(BorderLayout.CENTER, centerPanel);
centerPanel.setLayout(new GridLayout(0, 2, PAD, PAD));
centerPanel.add(new JLabel("Serial Ports", JLabel.RIGHT));
serialPortsChoice = new JComboBox();
centerPanel.add(serialPortsChoice);
serialPortsChoice.setEnabled(false);
centerPanel.add(new JLabel("Parallel Ports", JLabel.RIGHT));
parallelPortsChoice = new JComboBox();
centerPanel.add(parallelPortsChoice);
parallelPortsChoice.setEnabled(false);
centerPanel.add(new JLabel("Unknown Ports", JLabel.RIGHT));
other = new JComboBox();
centerPanel.add(other);
other.setEnabled(false);
centerPanel.add(new JLabel("Your choice:", JLabel.RIGHT));
centerPanel.add(choice = new JLabel());
JButton okButton;
cp.add(BorderLayout.SOUTH, okButton = new JButton("OK"));
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
PortChooser.this.dispose();
}
});
}
/**
* Populate the ComboBoxes by asking the Java Communications API what ports
* it has. Since the initial information comes from a Properties file, it
* may not exactly reflect your hardware.
*/
protected void populate() {
// get list of ports available on this particular computer,
// by calling static method in CommPortIdentifier.
Enumeration pList = CommPortIdentifier.getPortIdentifiers();
// Process the list, putting serial and parallel into ComboBoxes
while (pList.hasMoreElements()) {
CommPortIdentifier cpi = (CommPortIdentifier) pList.nextElement();
// System.out.println("Port " + cpi.getName());
map.put(cpi.getName(), cpi);
if (cpi.getPortType() == CommPortIdentifier.PORT_SERIAL) {
serialPortsChoice.setEnabled(true);
serialPortsChoice.addItem(cpi.getName());
} else if (cpi.getPortType() == CommPortIdentifier.PORT_PARALLEL) {
parallelPortsChoice.setEnabled(true);
parallelPortsChoice.addItem(cpi.getName());
} else {
other.setEnabled(true);
other.addItem(cpi.getName());
}
}
serialPortsChoice.setSelectedIndex(-1);
parallelPortsChoice.setSelectedIndex(-1);
}
protected void finishGUI() {
serialPortsChoice.addItemListener(this);
parallelPortsChoice.addItemListener(this);
other.addItemListener(this);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
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