waitingalert.java

国外的j2me播放器软件

/*
 * Created on 04.mai.2006
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package no.auc.one.portableplayer.userinterface;

import java.io.IOException;

import javax.microedition.lcdui.*;

import no.auc.one.portableplayer.utils.CancelAction;

import org.apache.log4j.Logger;

public class WaitingAlert extends Alert implements Runnable, CommandListener {
    private final Logger LOG = Logger.getLogger("MUA");
    Displayable prevDisp;
    Display disp;
    Gauge progress;
    Command stop;
    CancelAction action;
    Thread owner;
    boolean stoppable = true;
    
    public WaitingAlert(
        String title,
        Display d,
        CancelAction cancelAction,
        Thread ownerThread) {
        
        this(title, d, cancelAction, ownerThread, true);
    }
    
    public WaitingAlert(
        String title, 
        Display d, 
        CancelAction cancelAction, 
        Thread ownerThread,
        boolean stoppable) 
    {
        super(title);

        try {
            disp = d;
            action = cancelAction;
            owner = ownerThread;
            this.stoppable = stoppable; 

            progress = new Gauge(
                null, 
                false, 
                Gauge.INDEFINITE, 
                Gauge.CONTINUOUS_RUNNING);

            if (stoppable) {
                stop = new Command("Stop", Command.STOP, 1);
                
                addCommand(stop);
                setCommandListener(this);
            }

            setString("Please wait...");
            setTimeout(Alert.FOREVER); // XXX Or something more 'sophisticated'?
            setType(AlertType.INFO);
            setIndicator(progress);
            setImage(Image.createImage("/aml_noalpha.png"));
        } catch (IOException ioe) {
            LOG.debug("Probably error loading aml_noalpha.png for MenuUpdateAlert");
            LOG.debug(ioe);
        }
    }

    public void start() {
        System.out.println("Starting a new thread for this WA");
        Thread t = new Thread(this);
        t.start();
        System.out.println("Thread should now be running....");
    }   

    public void run() {
        System.out.println("Running thread. Switching current display to: " + toString());
        if (disp.getCurrent() != this) {
            prevDisp = disp.getCurrent();
            disp.setCurrent(this);
        }
    }

    public void commandAction(Command c, Displayable d) {
        if (c == stop) {
            try {
                setString("Stop was pressed. Cancel disco");
                LOG.debug("Stop was pressed. Cancel disco");
                action.cancel();
                owner.interrupt();
            } catch (IllegalStateException ise) {
                setString(getString() + "\nIllegalStateException while stopping discovery.");
                LOG.fatal("IllegalStateException while stopping discovery");
                LOG.fatal(ise);
            } catch (IOException ioe) {
                setString(getString() + "\nIOException while stopping disco");
                LOG.fatal("IOException while stopping the discovery");
                LOG.fatal(ioe);

                // TODO What to do next?
                // 1) Change text of this alert to something like 
                // 'could not stop disco'
                // 2) Do the removeCommand anyways...
            } finally {
                setString(getString() + "\nCleaning up...");
                removeCommand(stop);
                setCommandListener(null);
                addCommand(Alert.DISMISS_COMMAND);
                setTimeout(1);
                setString(getString() + "\nWhat happends now?!?!?");
                setString(getString() + "\nPrevDisp = " + prevDisp);
                if (isShown()) {
                    disp.setCurrent(prevDisp);
                }
            }
        } else {
            LOG.debug("Unknown command pressed");
            setString(getString() + "\r\nUnknown command pressed");
        }
    }

    public Displayable getPrevDisplayable() {
        return prevDisp;
    }

    public String toString() {
        return getTitle() + "@" + hashCode();
    }
}