ProgressForm.java from GridBlocks at Krugle

Show ProgressForm.java syntax highlighted

/**
 * Copyright (c) 2004
 * Helsinki Institute of Physics
 * see LICENSE file for details
 *
 * ProgressForm.java
 * Created on Apr 1, 2004
 */

package fi.hip.gb.client;

import java.util.Timer;
import java.util.TimerTask;

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;

/**
 * Shows status of the operation.
 * 
 * @author Juho Karppinen
 */
public class ProgressForm extends Form implements CommandListener {
	/** timer used to update progressbar */
	private static Timer progressTimer;
	
	/**
	 * Initializes the progressbar which is shown during
	 * the network transmissions.
	 * @param message message shown to the user
	 */
	public ProgressForm(String message) {
		super(message);
		
		StringItem elapsed = new StringItem("", null);
		append(elapsed);
		
		Gauge status = new Gauge(null, false, 100, 0);
		append(status);

		addCommand(new Command("Cancel", Command.CANCEL, 1));
		setCommandListener(this);
		
		StatusUpdate updater = new StatusUpdate(elapsed, status);
		progressTimer = new Timer();
		progressTimer.scheduleAtFixedRate(updater, 1000, 1000);
	}
	
	/**
	 * Close all thread
	 */
	public static void cancel() {
		if(progressTimer != null) {
			progressTimer.cancel();
            progressTimer = null;
		}
	}
	
	/**
	 * A class to increment the value of a Gauge everytime it is run.
	 * Updates the progressbar which is shown during network transfers.
	 */
	class StatusUpdate extends TimerTask {
		private StringItem elapsed = null;
		private Gauge status = null;
		private int tick = 0;

		public StatusUpdate(StringItem elapsedText, Gauge statusGauge) {
			elapsed = elapsedText;
			status = statusGauge;
		}

		public void run() {
			//elapsed.setText(client.getCurrentPosition() + " / " + client.getMaximumPosition());
			String maximum = (MIDui.getClient().getMaximumPosition() > 100) ?
					MIDui.getClient().getMaximumPosition() / 1000 + " kb" :
						MIDui.getClient().getMaximumPosition() + " b";
			elapsed.setText(MIDui.getClient().getDirection() + " " + maximum
					+ ". Elapsed " + Integer.toString(++tick) + "s");
			/*
			System.out.println("setting " + 
					MIDui.getClient().getCurrentPosition() + " / " + 
					MIDui.getClient().getMaximumPosition());
			*/
			status.setValue(MIDui.getClient().getCurrentPosition());
			status.setMaxValue(MIDui.getClient().getMaximumPosition());
			
			if(MIDui.getDisplay().getCurrent() != ProgressForm.this) {
				System.out.println("Stopping statusupdates");
                this.cancel();
				ProgressForm.cancel();
			}
		}
	}
	
	public void commandAction(Command c, Displayable dp) {
		MIDui.getClient().cancel();
		MIDui.back(true);
	}
}
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