Logging.java from GridBlocks at Krugle

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/**
 * Copyright (c) 2004 
 * Helsinki Institute of Physics
 * see LICENSE file for details
 *
 * Logging.java
 * Created on Feb 8, 2004
 */

package fi.hip.gb.client;

import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;

/**
 * Logging screen and routines.
 * 
 * @author Juho Karppinen
 */
public class Logging extends Form implements CommandListener {
	/** login name */
	private TextField tfUserName =
		new TextField("User name: ", "", 32, TextField.ANY);
	/** login password */
	private TextField tfPassword = 
		new TextField("Password: ", "", 32, TextField.PASSWORD);
	
	public Logging() {
		super("Login to the server");
		
		append(new StringItem("info:", "Login to the server"));
		append(tfUserName);
		append(tfPassword);
		
		addCommand(new Command("Login", Command.OK, 1));
		addCommand(new Command("Cancel", Command.BACK, 1));
		setCommandListener(this);

		String username = Configs.readString(Configs.INDEX_LOGINNAME);
		if(username == null)
			username = MIDui.instance.getAppProperty("UserName"); 
		tfUserName.setString(username);
	}
	
	/**
	 * Gets the login name of the user
	 * @return user name
	 */
	public String getLoginName() {
		return tfUserName.getString();
	}
	
	/**
	 * Login to the server using values of the UI fields.
	 * Returns back to main form if loggin succeeded, otherwise
	 * shows the exception and retry
	 */
	private void logging() {
		MIDui.next(new ProgressForm("Logging user " + tfUserName.getString()));
		
		new Thread( new Runnable() {
			public void run() {
				try {
					MIDui.getClient().login(
							tfUserName.getString(),
							tfPassword.getString());
					
					// save the username for next time
					Configs.storeString(Configs.INDEX_LOGINNAME, tfUserName.getString());
					
					// should re-execute the command but just go back to start
					MIDui.showMainForm();

				} catch (Exception e) {
					MIDui.showException("Logging failed", e);
				}
			}
		}).start();
	}

	/*
	 * @see javax.microedition.lcdui.CommandListener#commandAction(javax.microedition.lcdui.Command, javax.microedition.lcdui.Displayable)
	 */
	public void commandAction(Command c, Displayable disp) {
		if (c.getCommandType() == Command.OK) {
			if(tfPassword.getString().length() >= 6)
				logging();
			else
				MIDui.showAlert("Password too short", 
						"Password must be at least 6 characters",
						AlertType.CONFIRMATION);
		} else {
			MIDui.back(true);
		}
	}
}
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