TextArea resistant to change...

From:
 "julielaurek@gmail.com" <julielaurek@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Fri, 03 Aug 2007 19:47:02 -0000
Message-ID:
<1186170422.104234.171990@b79g2000hse.googlegroups.com>
Hey guys!!

I'm trying to figure out what I've done wrong here. So I have the
piece of code at the end of this post and I'm trying to reset the text
everytime a button is clicked, but nothing happens. I am using
com.neva from this website:http://www.nevaobject.com/products.htm
(mainly JPrint, but you need Coroutine to make it work)
and it works fine with their sample code at the bottom of this page:
http://www.nevaobject.com/_docs/_jprint/JPrint.htm
So I must have a syntax or scope problem or something somewhere but I
can't figure it out. Can anyone please help me out?

Thanks,

JL

//Basically this dialog pops up when i click on a button generated by
another class, pWATCH.

import java.awt.*;
import java.awt.event.*;
import java.util.*;

import javax.print.*;

import com.neva.*;
public class PrinterMonitor extends Dialog implements ActionListener {
    final int height = 450;
    final int width = 200;
    private pWATCH parent;
    private String[] printerNames;
    private Panel textPanel;
    private TextArea printerMessages;
    private PrintService[] services =
PrintServiceLookup.lookupPrintServices(null, null);

    public PrinterMonitor(pWATCH parent) {
        super(parent, "Printer Monitor", true);
        this.parent = parent;
        addWindowListener(new CloseHandler(this));

        if(services.length != 0){
            Panel introPanel = new Panel();
            introPanel.setLayout(new GridLayout(2,1));
            introPanel.add(new Label("Please select the printer you will be
monitoring", Label.CENTER));
            introPanel.add(new Label("Please verify that pageWATCH is attached
to the chosen printer", Label.CENTER));

            Panel namesPanel = new Panel();
            namesPanel.setLayout(new GridLayout(4, 4));
            for (int i = 0; i < getButtons().length; i++){
                getButtons()[i].addActionListener(this);
                namesPanel.add(getButtons()[i]);
            }
            Panel cancelButtonP = new Panel();
            cancelButtonP.setLayout(new GridLayout(4,4));
            Button cancelButton = new Button("Cancel!");
            cancelButton.addActionListener(this);
            cancelButtonP.add(cancelButton);

            Panel allButtons = new Panel();
            allButtons.setLayout(new GridLayout(2,1));
            allButtons.add(namesPanel);
            allButtons.add(cancelButtonP);
            add(allButtons, "Center");

            textPanel = new Panel();
            textPanel.setLayout(new GridLayout(1,1));
            printerMessages = new TextArea();
            printerMessages.setEditable(false);
            textPanel.add(printerMessages);
            add(textPanel, "South");
        }
        else{
         Panel infoPanel = new Panel();
         infoPanel.add (new Label("Sorry. There are no printers
connected to this machine.", Label.CENTER));
            infoPanel.add(new Label("Please connect a printer and try
again.", Label.CENTER));
            add(infoPanel, "Center");
        }
        int minScreenWidth = getWidth();
        setSize(width + minScreenWidth, height);
        setLocation(parent.getLocationOnScreen().x + 30,
parent.getLocationOnScreen().y + 30);
        setVisible(true);
    }
    public void actionPerformed(ActionEvent e) {
        String cmd = e.getActionCommand();
        for (int i = 0; i < getPrinterNames().length; i++){
            if(cmd.equals(getPrinterNames()[i])){
                String pname = getPrinterNames()[i];
                JPrint jpr = new JPrint();
                jpr.ReleasePrinter();
                PrinterInfo info=JPrint.GetPrinterInfo(pname);
                if(info!=null) {
                 String printername = "Printer Name: " + info.PrinterName();
                 String portname = "Port Name: " + info.PortName();
                 String comment = "Comment: " + info.Comment();
                 String numberofjobs = "Number of Jobs in Queue: " +
info.Jobs();
                 String averageppm = "AveragePPM" + info.AveragePPM();
                 printerMessages.setText("\n--- " + printername + " ---\n"
                 + portname + "\n" + comment + "\n" + numberofjobs +
                 "\n" + averageppm + "\n");
                }
                }
            }
        }
    }
    public void colorUp(){
        Color someSortOfBlue = new Color(51, 153, 153);
        this.setBackground(someSortOfBlue);
    }
    public Button[] getButtons(){
        Button[] printerButtons = new Button[services.length];
        for (int i = 0; i < services.length; i++){
            printerButtons[i] = new Button (services[i].getName());
        }
        return printerButtons;
    }
    public String[] getPrinterNames(){
        printerNames = new String[services.length];
        for (int i = 0; i <services.length; i++){
            printerNames[i] = services[i].getName();
            }
        return printerNames;
    }
    public double myMax(double[] array){
        double tracker1 = array[0];
        double tracker2 = array[0];
        double sizeOfArray = array.length ;
        if (sizeOfArray == 0){
            System.out.println("The array has no items!");
            return 0;
        }
        for(int i = 1; i< sizeOfArray ; i++ ){
            tracker1 = Math.max(tracker2, array[i]);
            tracker2 = tracker1;
        }
        return tracker1;
    }
    public int getWidth(){
        printerNames = getPrinterNames();
        FontMetrics fm = getFontMetrics(getFont());
        double[] printerNamesWidth = new double[printerNames.length];
            for (int i = 0; i < printerNames.length; i++){
                printerNamesWidth[i] =
fm.stringWidth(printerNames[i]);
                }return (int) myMax(printerNamesWidth);
    }
    class CloseHandler extends WindowAdapter{
        PrinterMonitor pm;

        public CloseHandler(PrinterMonitor pm){
            this.pm = pm;
        }

        public void windowClosing (WindowEvent e){
            pm.removeWindowListener(this);
            pm.dispose();
        }
    }

}

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