progressobserverui.java

实现了一个基于j2me移动gps定位系统

/*
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 * original Java Smart Ticket Sample Application code obtained from Sun
 * Microsystems, Inc. only:
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/*
 * $Id: ProgressObserverUI.java 232 2008-05-16 05:36:12Z khanh.lnq $
 * $URL: https://jvnmobilegis.googlecode.com/svn/trunk/src/org/javavietnam/gis/client/midp/ui/ProgressObserverUI.java $
 * $Author: khanh.lnq $
 * $Revision: 232 $
 * $Date: 2008-05-16 12:36:12 +0700 (Fri, 16 May 2008) $
 *
 * ====================================================================
 *
 * Copyright (C) 2006-2007 by JVNGIS
 *
 * All copyright notices regarding JVNMobileGIS MUST remain
 * intact in the Java codes and resource files.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Support can be obtained from project homepage at:
 * http://code.google.com/p/jvnmobilegis/
 *
 * Correspondence and Marketing Questions can be sent to:
 * khanh.lnq AT gmail.com
 * 
 * @version: 1.0
 * @author: Khanh Le
 * @Date Created: 22 Jun 2007
 */
package org.javavietnam.gis.client.midp.ui;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.lcdui.StringItem;

import org.javavietnam.gis.client.midp.util.ProgressObserver;

/**
 * @author khanhlnq
 */
public class ProgressObserverUI extends Form implements ProgressObserver,
        CommandListener {

    private UIController uiController;
    private static final int GAUGE_MAX = 10;
    private static final int GAUGE_LEVELS = 2;
    private int current = 0;
    private Gauge gauge;
    private StringItem note;
    private Command stopCommand;
    /**
     * @uml.property name="stoppable"
     */
    private boolean stoppable;
    /**
     * @uml.property name="stopped"
     */
    private boolean stopped;

    public ProgressObserverUI(UIController uiController) {
        super("");

        this.uiController = uiController;

        gauge = new Gauge("", false, GAUGE_MAX, 0);
        note = new StringItem("", "");
        stopCommand = new Command(uiController.getString(UIConstants.STOP),
                Command.STOP, 1);

        append(gauge);
        append(note);
        setCommandListener(this);
    }

    public void init(String note, boolean stoppable) {
        gauge.setValue(0);
        setNote(note);
        setStoppable(stoppable);

        stopped = false;
    }

    public void setNote(String note) {
        setTitle(note);
        this.note.setText(note);
    }

    /**
     * @return Returns the stoppable.
     * @uml.property name="stoppable"
     */
    public boolean isStoppable() {
        return stoppable;
    }

    /**
     * @param stoppable
     *            The stoppable to set.
     * @uml.property name="stoppable"
     */
    public void setStoppable(boolean stoppable) {
        this.stoppable = stoppable;

        if (stoppable) {
            addCommand(stopCommand);
        } else {
            removeCommand(stopCommand);
        }
    }

    /**
     * Indicates whether the user has stopped the progress. This message should
     * be called before calling update.
     * 
     * @uml.property name="stopped"
     */
    public boolean isStopped() {
        return stopped;
    }

    public void updateProgress() {
        current = (current + 1) % GAUGE_LEVELS;

        gauge.setValue(current * GAUGE_MAX / GAUGE_LEVELS);
    }

    public void commandAction(Command c, Displayable d) {
        if (c == stopCommand) {
            stopped = true;
            uiController.stopRequested();
        }
    }
}