lptmode.java

java communications api 3.0

/*
 * @(#)LPTMode.java	1.7 00/05/04 SMI
 * 
 * Author: Tom Corson
 * 
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license
 * to use, modify and redistribute this software in source and binary
 * code form, provided that i) this copyright notice and license appear
 * on all copies of the software; and ii) Licensee does not utilize the
 * software in a manner which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE
 * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS
 * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
 * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control
 * of aircraft, air traffic, aircraft navigation or aircraft
 * communications; or in the design, construction, operation or
 * maintenance of any nuclear facility. Licensee represents and
 * warrants that it will not use or redistribute the Software for such
 * purposes.
 */
import java.awt.Choice;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import javax.comm.ParallelPort;
import javax.comm.UnsupportedCommOperationException;

/**
 * Class declaration
 *
 *
 * @author
 * @version 1.7, 05/04/00
 */
class LPTMode extends Choice implements ItemListener {
    private ParallelPortDisplay owner;

    /**
     * Constructor declaration
     *
     *
     * @param owner
     *
     * @see
     */
    public LPTMode(ParallelPortDisplay owner) {
	super();

	this.add("Unknown");
	this.add("Any");
	this.add("ECP");
	this.add("EPP");
	this.add("NIBBLE");
	this.add("PS2");
	this.add("SPP");
	this.addItemListener(this);

	this.owner = owner;
    }

    /**
     * Method declaration
     *
     *
     * @see
     */
    protected void showValue() {
	ParallelPort port = this.owner.port;

	if (this.owner.open) {

	    /*
	     * Get the port mode
	     */
	    switch (this.owner.port.getMode()) {

	    case ParallelPort.LPT_MODE_ANY:
		this.select("Any");

		break;

	    case ParallelPort.LPT_MODE_ECP:
		this.select("ECP");

		break;

	    case ParallelPort.LPT_MODE_EPP:
		this.select("EPP");

		break;

	    case ParallelPort.LPT_MODE_NIBBLE:
		this.select("NIBBLE");

		break;

	    case ParallelPort.LPT_MODE_PS2:
		this.select("PS2");

		break;

	    case ParallelPort.LPT_MODE_SPP:
		this.select("SPP");

		break;

	    default:
		this.select("Unknown");

		break;
	    }
	} else {
	    this.select("Unknown");
	} 
    } 

    /**
     * Method declaration
     *
     *
     * @param ev
     *
     * @see
     */
    public void itemStateChanged(ItemEvent ev) {
	ParallelPort port;
	String       sel = (String) ev.getItem();
	int	     value = 0;

	if (sel.equals("Any")) {
	    value = ParallelPort.LPT_MODE_ANY;
	} else if (sel.equals("ECP")) {
	    value = ParallelPort.LPT_MODE_ECP;
	} else if (sel.equals("EPP")) {
	    value = ParallelPort.LPT_MODE_EPP;
	} else if (sel.equals("NIBBLE")) {
	    value = ParallelPort.LPT_MODE_NIBBLE;
	} else if (sel.equals("PS2")) {
	    value = ParallelPort.LPT_MODE_PS2;
	} else if (sel.equals("SPP")) {
	    value = ParallelPort.LPT_MODE_SPP;
	} else {
	    this.showValue();

	    return;
	} 

	port = this.owner.port;

	if (port != null) {

	    /*
	     * Set the mode.
	     */
	    try {
		port.setMode(value);
	    } catch (UnsupportedCommOperationException e) {
		System.out.println("Cannot set mode to " + sel + " for port " 
				   + port.getName());
	    } 
	} 

	this.owner.showValues();
    } 

}