Re: implementing a JProgressBar

[<klfletcher@yahoo.com>]

What I did was the following:


Class name "StartupStatus.java"
---------------------------
import javax.swing.*;
import java.awt.*;
import oracle.jdeveloper.layout.*;

/**
 * A Swing-based dialog class.
 * <P>
 * @author Kent Fletcher
 */
public class StartupStatus extends JDialog
{
    JPanel jPanel1 = new JPanel();
    XYLayout xYLayout1 = new XYLayout();
    JProgressBar pb = new JProgressBar();
    JLabel jLabel1 = new JLabel();

    /**
     * Constructs a new instance.
     * @param parent
     * @param title
     * @param modal
     */
    public StartupStatus(Frame parent, String title, boolean modal)
    {
        super(parent, title, modal);
        try
        {
            jbInit();
            pack();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * Constructs a new non-modal unparented instance with a blank title.
     */
    public StartupStatus()
    {
        this(null, "", false);
    }

    /**
     * Initializes the state of this instance.
     */
    private void jbInit() throws Exception
    {
        jPanel1.setLayout(xYLayout1);
        xYLayout1.setHeight(142);
        xYLayout1.setWidth(400);
        jLabel1.setText("Please Wait While App is Initialized");
        jLabel1.setFont(new Font("Dialog", 1, 16));
        getContentPane().add(jPanel1);
    jPanel1.add(pb, new XYConstraints(15, 73, 362, 22));
    jPanel1.add(jLabel1, new XYConstraints(68, 40, -1, -1));
    }

    public void setProgressValue(int val)
    {
        pb.setValue(val);
    }

    public void setProgressMinimum(int val)
    {
        pb.setMinimum(val);
    }

    public void setProgressMaximum(int val)
    {
        pb.setMaximum(val);
    }
}


Then to use this object, here is an example:

    int MAX = whatever you want;


        StartupStatus jdp = new StartupStatus(jf, "Startup Status", false);

//where jf is your parent JFrame

        //Center the window
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize = jdp.getSize();
        if (frameSize.height > (screenSize.height-25))
        {
            frameSize.height = (screenSize.height-25);
        }
        if (frameSize.width > screenSize.width)
        {
            frameSize.width = screenSize.width;
        }
        jdp.setLocation((screenSize.width - frameSize.width)/2,
((screenSize.height-25) - frameSize.height)/2);



        jdp.setProgressMinimum(0);
        jdp.setProgressMaximum(MAX);
        jdp.setVisible(true);


//   put a loop here
    int ctr=0;

    for(int i=0; i< MAX; i++)
    {
        // your do your stuff here
        jdp.setProgressValue(i);
    }

    //when your done, set visible to false.
        jdp.setVisible(false);





The key is to know your MAX.

Good luck
Kent

----- Original Message -----
From: "Jason R. Kretzer" <jason@OpinionOne.com>
To: <ajug-members@ajug.org>
Sent: Monday, March 25, 2002 3:12 PM
Subject: implementing a JProgressBar


> I have an executable jar that extracts files from itself. I would like to
> have a JProgressBar show the progress of this. Below is the code I use for
> extraction. How can I implement a JProgressBar to use this? I would like
to
> increment it with each "buffered IO dump".
>
> code:
>
> JarFile thisJar = new JarFile("some.jar");
> Enumeration enum = thisJar.entries();
> enum.nextElement();
> File dir = null;
> JarEntry je=null;
> InputStream is=null;
> BufferedInputStream bi=null;
> FileOutputStream fos=null;
> BufferedOutputStream bo=null;
>
> /*fileList is an array of Strings each is a name
> a jar entry*/
> for(int i = 0;i<fileList.length;i++)
> {
>    String str = fileList[i].toString();
>
>    if(str.indexOf('.',0)==-1)
>    {
>       dir = fileList[i].getParentFile();
> dir.mkdirs();
> fileList[i].mkdirs();
> continue;
>    }
>
>    je = ((JarEntry)enum.nextElement());
>    is = getClass().getClassLoader().getResourceAsStream(je.toString());
>    bi = new BufferedInputStream(is,16384);
>    fos = new FileOutputStream(fileList[i]);
>    bo = new BufferedOutputStream(fos,16384);
>    try
>    {
>       while(true)
>       {
>          byte [] byteArray = new byte[16384];
>          int intRead = bi.read(byteArray, 0, byteArray.length);
>          bo.write(byteArray, 0, intRead);
>          bo.flush();
>       }
>    }
>    catch (Exception k)
>    {
>       k.printStackTrace(ps);
>       System.out.println("There were problems extracting the Jar!");*/
>    }
>    bi.close();
>    bo.close();
> }
>
>
> Thanks in advance,
>
> -Jason
>
>
****************************************************************************
> ********
> Jason R. Kretzer
> Software Engineer
> Opinion One
> Email:  jason@opone.com
> Phone:  (513) 361-2771
> Website:  http://alia.iwarp.com
>
> "Make visible what, without you, might perhaps never have been seen."
> --Robert Bresson
>
****************************************************************************
> ********


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