Problems with repainting
Hi,
I have a JFrame, which contains a JPanel (named activePanel). I also added a method to change the active JPanel. It goes like this:
public class MyFrame extends JFrame {
private JPanel activePanel;
public void setActivePanel(JPanel otherPanel) {
activePanel.setVisible(false);
activePanel = otherPanel;
activePanel.revalidate();
activePanel.setVisible(true);
this.getContentPane().validate();
this.getContentPane().repaint();
System.out.println("finished!"); // for debugging only
The problem is that when this method is called, the current activePanel becomes invisible, the 'finished'-string is printed, but the otherPanel is still not showing...
What is going wrong? What can I do?
TIA
Hello!
I think you would like to replace the active panel
with another panel.
There are two methods to do this:
1.
Remove the panel from the frame and then add the new
panel to the frame
2.
Use CardLayout manager instead. It is very fine!
This layout manager lays out components like cards in deck.
Only one 'card' can be shown at a time (int this situation the activePanel).
You can use the show(Container c, String name) method
to switch between panels.
I have used this layout manager in my project and it works
fine.
Hope it helps you
regards
Feri
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* To change this template, choose Tools | Templates
* and open the template in the editor.
* @author Man Ik Weet
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(Simplified version):
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public static int HEIGHT = 100;
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Solved!
Go to Solution.
Attachments:
RepaintTest_Bad.gif 27 KB
Test Repaint - From Bad VI, scrollbar and repaint problems.vi 7 KB
Test Repaint - From Blank VI, no problems.vi 5 KBSeems something got corrupted with this VI. Copy things over to a fresh VI and things should be OK.
See also this recent report of a similar issue.
LabVIEW Champion . Do more with less code and in less time . -
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buttons[1] = new JButton ("DONE");
buttons[2] = new JButton ("SLEEP");
buttons[3] = new JButton ("INVOKE LATER");
buttons[4] = new JButton ("DELAY");
JPanel buttonPanel = new JPanel();
for (int i = 0; i < buttons.length; i++)
buttonPanel.add (buttons);
frame.getContentPane().add (buttonPanel);
frame.pack();
frame.setVisible (true);
public void addListeners (ActionListener listener)
for (int i = 0; i < buttons.length; i++)
buttons[i].addActionListener (listener);
public void actionPerformed (ActionEvent e)
System.out.print (frame.getTitle() + ": " + e.getActionCommand());
if (e.getActionCommand().equals ("BUSY"))
frame.setCursor (busy);
else if (e.getActionCommand().equals ("DONE"))
frame.setCursor (done);
else if (e.getActionCommand().equals ("SLEEP"))
frame.setCursor (busy);
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.print (" finished");
else if (e.getActionCommand().equals ("INVOKE LATER"))
frame.setCursor (busy);
SwingUtilities.invokeLater (thread);
else if (e.getActionCommand().equals ("DELAY"))
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (busy);
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.print (" finished");
System.out.println();
Runnable thread = new Runnable()
public void run()
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.println (" finished");
public static void main (String[] args)
BusyFrameTest f1 = new BusyFrameTest ("F1");
f1.addListeners (f1);
BusyFrameTest f2 = new BusyFrameTest ("F2");
BusyFrameTest f3 = new BusyFrameTest ("F3");
f2.addListeners (f3); // 2 listens to 3
f3.addListeners (f2); // 3 listens to 2I've had the same problems with cursors and repaints in a swing application, and I was thinking of if I could use invokeLater, but I never got that far with it.
I still believe you would need a thread for the time consuming task, and that invokeLater is something you only need to use in a thread different from the event thread. -
Can some one help me with this problem with my frame???
i have gt a veri strange problem with my program,that is teh graphic changes only when i resize the the frame,if i dun resize,it will remain the same.However what i intended is that when i click on the radio button,it will change immediately to the respective pages.A simple version of my code is below,can someone helpl me solve it??(there is 3 different class)
import java.awt.event.*;
import javax.swing.*;
public class MainPg extends JFrame implements ActionListener{
private javax.swing.JPanel jContentPane = null;
private javax.swing.JPanel buttons = null;
private javax.swing.JRadioButton one = null;
private javax.swing.JRadioButton two = null;
private javax.swing.JPanel change = null;
public MainPg() {
super();
initialize();
private void initialize() {
this.setSize(300, 200);
this.setContentPane(getJContentPane());
this.setName("mainClass");
this.setVisible(true);
private javax.swing.JPanel getJContentPane() {
if (jContentPane == null) {
jContentPane = new javax.swing.JPanel();
jContentPane.setLayout(new java.awt.BorderLayout());
jContentPane.add(getButtons(), java.awt.BorderLayout.WEST);
jContentPane.add(getChange(), java.awt.BorderLayout.CENTER);
return jContentPane;
private javax.swing.JPanel getButtons() {
if(buttons == null) {
buttons = new javax.swing.JPanel();
java.awt.GridLayout layGridLayout1 = new java.awt.GridLayout();
layGridLayout1.setRows(2);
layGridLayout1.setColumns(1);
ButtonGroup group=new ButtonGroup();
group.add(getOne());
group.add(getTwo());
buttons.setLayout(layGridLayout1);
buttons.add(getOne(), null);
buttons.add(getTwo(), null);
return buttons;
private javax.swing.JRadioButton getOne() {
if(one == null) {
one = new javax.swing.JRadioButton();
one.setText("One");
one.setSelected(true);
one.addActionListener(this);
one.setActionCommand("one");
return one;
private javax.swing.JRadioButton getTwo() {
if(two == null) {
two = new javax.swing.JRadioButton();
two.setText("Two");
two.addActionListener(this);
two.setActionCommand("two");
return two;
private javax.swing.JPanel getChange() {
if(change == null) {
change = new javax.swing.JPanel();
change.add(new One());
return change;
public static void main(String[] args){
new MainPg();
public void actionPerformed(ActionEvent e) {
change.removeAll();
if("one".equals(e.getActionCommand())){
change.add(new One());
else{
change.add(new Two());
change.repaint();
import javax.swing.*;
public class One extends JPanel {
private javax.swing.JPanel jPanel = null;
private javax.swing.JLabel jLabel = null;
private javax.swing.JPanel jPanel1 = null;
private javax.swing.JLabel jLabel1 = null;
private javax.swing.JLabel jLabel2 = null;
public One() {
super();
initialize();
* This method initializes this
* @return void
private void initialize() {
this.setLayout(new java.awt.BorderLayout());
this.add(getJPanel(), java.awt.BorderLayout.NORTH);
this.add(getJPanel1(), java.awt.BorderLayout.WEST);
this.setSize(300, 200);
* This method initializes jPanel
* @return javax.swing.JPanel
private javax.swing.JPanel getJPanel() {
if(jPanel == null) {
jPanel = new javax.swing.JPanel();
jPanel.add(getJLabel(), null);
return jPanel;
* This method initializes jLabel
* @return javax.swing.JLabel
private javax.swing.JLabel getJLabel() {
if(jLabel == null) {
jLabel = new javax.swing.JLabel();
jLabel.setText("one");
return jLabel;
* This method initializes jPanel1
* @return javax.swing.JPanel
private javax.swing.JPanel getJPanel1() {
if(jPanel1 == null) {
jPanel1 = new javax.swing.JPanel();
java.awt.GridLayout layGridLayout2 = new java.awt.GridLayout();
layGridLayout2.setRows(2);
layGridLayout2.setColumns(1);
jPanel1.setLayout(layGridLayout2);
jPanel1.add(getJLabel2(), null);
jPanel1.add(getJLabel1(), null);
return jPanel1;
* This method initializes jLabel1
* @return javax.swing.JLabel
private javax.swing.JLabel getJLabel1() {
if(jLabel1 == null) {
jLabel1 = new javax.swing.JLabel();
jLabel1.setText("one");
return jLabel1;
* This method initializes jLabel2
* @return javax.swing.JLabel
private javax.swing.JLabel getJLabel2() {
if(jLabel2 == null) {
jLabel2 = new javax.swing.JLabel();
jLabel2.setText("one");
return jLabel2;
import javax.swing.*;
public class Two extends JPanel {
private javax.swing.JLabel jLabel = null;
public Two() {
super();
initialize();
* This method initializes this
* @return void
private void initialize() {
this.setLayout(new java.awt.FlowLayout());
this.add(getJLabel(), null);
this.setSize(300, 200);
* This method initializes jLabel
* @return javax.swing.JLabel
private javax.swing.JLabel getJLabel() {
if(jLabel == null) {
jLabel = new javax.swing.JLabel();
jLabel.setText("two");
return jLabel;
}//change.repaint();
change.revalidate(); -
Problem with JTable and JPanel
Hi,
I'm having problems with a JTable in a JPanel. The code is basicly as follows:
public class mainFrame extends JFrame
public mainFrame()
//A menu is implemeted giving rise to the following actions:
public void actionPerformed(ActionEvent evt)
String arg = evt.getActionCommand();
if(arg.equals("Sit1"))
//cells, columnNames are initiated correctly
JTable table = new JTable(cells,columnNames);
JPanel holdingPanel = new JPanel();
holdingPanel.setLayout( new BorderLayout() );
JScrollPane scrollPane = new JScrollPane(holdingPanel);
holdingPanel.setBackground(Color.white);
holdingPanel.add(table,BorderLayout.CENTER);
add(scrollPane, "Center");
if(arg.equals("Sit2"))
if(scrollPane !=null)
remove(scrollPane);validate();System.out.println("ScrollPane");
if(holdingPanel !=null)
remove(holdingPanel);
if(table !=null)
remove(table);table.setVisible(false);System.out.println("table");
//Put other things on the holdingPanel....
private JScrollPane scrollPane;
private JPanel holdingPanel;
private JTable table;
}The problem is that the table isn't removed. When you choose another situation ( say Sit2), at first the table apparently is gone, but when you press with the mouse in the area it appeared earlier, it appears again. How do I succesfully remove the table from the panel? Removing the panel doesn't seem to be enough. Help is much appreciated...
Best regards
SchwartzIf you reuse the panel and scroll pane throughout the application,
instantiate them in the constructor, not in an often-called event
handler. In the event handler, you only do add/remove of the table
on to the panel. You can't remove the table from the container
which does not directly contain it.
if (arg.equals("Sit2")){
holdingPanel.remove(table);
holdingPanel.revalidate();
holdingPanel.repaint(); //sometimes necessary
} -
Problem with Background image and JFrame
Hi there!
I've the following problem:
I created a JFrame with an integrated JPanel. In this JFrame I display a background image. Therefore I've used my own contentPane:
public class MContentPane extends JComponent{
private Image backgroundImage = null;
public MContentPane() {
super();
* Returns the background image
* @return Background image
public Image getBackgroundImage() {
return backgroundImage;
* Sets the background image
* @param backgroundImage Background image
public void setBackgroundImage(Image backgroundImage) {
this.backgroundImage = backgroundImage;
* Overrides the painting to display a background image
protected void paintComponent(Graphics g) {
if (isOpaque()) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
if (backgroundImage != null) {
g.drawImage(backgroundImage,0,0,this);
super.paintComponent(g);
Now the background image displays correct. But as soon as I click on some combobox that is placed within the integrated JPanel I see fractals of the opened combobox on the background. When I minimize
the Frame they disappear. Sometimes though I get also some fractals when resizing the JFrame.
It seems there is some problem with the redrawing of the background e.g. it doesn't get redrawn as often as it should be!?
Could anyone give me some hint, on how to achieve a clear background after clicking some combobox?
Thx in advanceI still prefer using a border to draw a background image:
import java.awt.*;
import java.awt.image.*;
import javax.swing.border.*;
public class CentredBackgroundBorder implements Border {
private final BufferedImage image;
public CentredBackgroundBorder(BufferedImage image) {
this.image = image;
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
int x0 = x + (width-image.getWidth())/2;
int y0 = y + (height-image.getHeight())/2;
g. drawImage(image, x0, y0, null);
public Insets getBorderInsets(Component c) {
return new Insets(0,0,0,0);
public boolean isBorderOpaque() {
return true;
}And here is a demo where I load the background image asynchronously, so that I can launch the GUI before the image is done loading. Warning: you may find the image disturbing...
import java.awt.*;
import java.io.*;
import java.net.URL;
import javax.imageio.*;
import javax.swing.*;
import javax.swing.border.*;
public class BackgroundBorderExample {
public static void main(String[] args) throws IOException {
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame f = new JFrame("BackgroundBorderExample");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextArea area = new JTextArea(24,80);
area.setForeground(Color.WHITE);
area.setOpaque(false);
area.read(new FileReader(new File("BackgroundBorderExample.java")), null);
final JScrollPane sp = new JScrollPane(area);
sp.setBackground(Color.BLACK);
sp.getViewport().setOpaque(false);
f.getContentPane().add(sp);
f.setSize(600,400);
f.setLocationRelativeTo(null);
f.setVisible(true);
String url = "http://today.java.net/jag/bio/JagHeadshot.jpg";
final Border bkgrnd = new CentredBackgroundBorder(ImageIO.read(new URL(url)));
Runnable r = new Runnable() {
public void run() {
sp.setViewportBorder(bkgrnd);
sp.repaint();
SwingUtilities.invokeLater(r);
} -
Problem with fireTableDataChanged in JTable
Hi everybody,
i have a really frustrating problem with Jtable. I created a class to display the jtable and a class that extends AbstactTableModel to use as its model. I can update my table after a fireTableDataChanged method in the class that extend the AbstractTableModel, but after implementing a ListSelectionListener to the class that displays the jtable, it gives a big bunch of errors in the console of my ide, when i remove it, it went back to normal without any errors.
Anyways, my program still can run without problem and the table still can refresh, just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachanged
anybody got this problem? how did you guys solve it?
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at farm.EmployeesTblModel.getValueAt(EmployeesTblModel.java:58)
at farm.EmployeesTblView.rowEditDelete(EmployeesTblView.java:131)
at farm.EmployeesTblView$1.valueChanged(EmployeesTblView.java:106)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:559)
at javax.swing.DefaultListSelectionModel.clearSelection(DefaultListSelectionModel.java:403)
at javax.swing.JTable.clearSelection(JTable.java:2040)
at javax.swing.JTable.clearSelectionAndLeadAnchor(JTable.java:2048)
at javax.swing.JTable.sortedTableChanged(JTable.java:4098)
at javax.swing.JTable.tableChanged(JTable.java:4346)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:280)
at javax.swing.table.AbstractTableModel.fireTableDataChanged(AbstractTableModel.java:182)
at farm.EmployeesTblModel.updateData(EmployeesTblModel.java:42)
at farm.EmployeesTblView.updateData(EmployeesTblView.java:59)
at farm.EmployeesTbl.delete(EmployeesTbl.java:273)
at farm.FarmView.delEmpBtnActionPerformed(FarmView.java:1823)
at farm.FarmView.access$2200(FarmView.java:32)
at farm.FarmView$18.actionPerformed(FarmView.java:823)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachangedWell, you should never have a button that invokes fireTableDataChanged.
The TableModel should be responsible for invoking those methods.
I suggest you look at the code for the DefaultTableModel for the proper way to write a TableModel. Basically you create methods to update the model. The model in turn fires the events to notify the view to repaint itself. -
Problems with SwingWorker and classes in my new job, ;), can you help me?
Hi all, ;)
First of all, sorry about my poor English.
I have a problem with Swing and Threads, I hope you help me (because I'm in the firsts two weeks in my new job)
I have two classes:
Form1: Its a JPanel class with JProgressBar and JLabel inside.
FormularioApplet: (the main) Its a JPanel class with a form1 inside.
I have to download a file from a server and show the progress of the download in the JProgressBar. To make it I do this:
In Form1 I make a Thread that update the progress bar and gets the fole from the server.
In FormularioApplet (the main) I call to the method getDownloadedFile from Form1 to get the File.
THE PROBLEM:
The execution of FormularioApplet finishes before the Thread of Form1 (with download the file) download the file. Then, when I call in FormularioApplet the variable with the file an Exception: Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException is generated.
First main begins his execution, then call to Form1 (a thread) then continues his execution and when the execution is finished ends the execution os Form1 and his thread.
How can I do for main class call the function and the Thread download his file after main class assign the file of return method?
How can I pass information froma class include an a main class. Form1 can't send to main (because main class made a Form1 f1 = new Form1()) any information from his end of the execution. I think if Form1 can say to main class that he finishes is job, then main class can gets the file.
I put in bold the important lines.
Note: My level of JAVA, you can see, is not elevated.
THANKS A LOT
Form1 class:
package es.cambrabcn.signer.gui;
import java.awt.HeadlessException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.swing.SwingUtilities;
public class Form1 extends javax.swing.JPanel {
//Variables relacionadas con la clase original DownloadProgressBar
private InputStream file;
private int totalCicles;
private int totalFiles;
private int currentProgress;
private SwingWorker worker;
private ByteArrayOutputStream byteArray;
private boolean done;
/** Creates new form prueba */
public Form1() {
initComponents();
this.byteArray = new ByteArrayOutputStream();
progressBar.setStringPainted(true);
//this.totalFiles = totalFiles;
currentProgress = 0;
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" C�digo Generado ">
private void initComponents() {
label1 = new javax.swing.JLabel();
progressBar = new javax.swing.JProgressBar();
statusLabel = new javax.swing.JLabel();
setBackground(new java.awt.Color(255, 255, 255));
setMaximumSize(new java.awt.Dimension(300, 150));
setMinimumSize(new java.awt.Dimension(300, 150));
setPreferredSize(new java.awt.Dimension(300, 150));
label1.setFont(new java.awt.Font("Arial", 1, 18));
label1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
label1.setText("Barra de progreso");
statusLabel.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
statusLabel.setText("Cargando");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(org.jdesktop.layout.GroupLayout.LEADING, statusLabel, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 280, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, progressBar, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 280, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, label1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 280, Short.MAX_VALUE))
.addContainerGap())
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(label1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(statusLabel)
.addContainerGap(73, Short.MAX_VALUE))
}// </editor-fold>
// Declaraci�n de variables - no modificar
private javax.swing.JLabel label1;
private javax.swing.JProgressBar progressBar;
private javax.swing.JLabel statusLabel;
// Fin de declaraci�n de variables
public byte[] getDownloadedFile(String documentToSign){
//Variables locales
byte puente[] = null;
try{
//Leemos el documento a firmar
StringTokenizer st = new StringTokenizer(documentToSign, ";");
Vector<URL> fileURL = new Vector<URL>();
HttpSender sender = new HttpSender(null);
//Introducimos la lista de URLs de archivos a bajar en el objeto Vector
for(; st.hasMoreTokens(); fileURL.add(new URL(st.nextToken())));
//Para cada URL descargaremos un archivo
for(int i = 0; i < fileURL.size(); i++) {
file = sender.getMethod((URL)fileURL.get(i));
if(file == null) {
Thread.sleep(1000L);
throw new RuntimeException("Error descarregant el document a signar.");
System.out.println("Form1 Dentro de getDownloadFile, Antes de startDownload()");
//Fijamos el valor del n�mero de ciclos que se har�n seg�n el tama�o del fichero
this.totalCicles = sender.returnCurrentContentLength() / 1024;
this.progressBar.setMaximum(totalCicles);
//Modificamos el texto del JLabel seg�n el n�mero de fichero que estemos descargando
this.statusLabel.setText((new StringBuilder("Descarregant document ")).append(i + 1).append(" de ").append(fileURL.size()).toString());
statusLabel.setAlignmentX(0.5F);
*//Iniciamos la descarga del fichero, este m�todo llama internamente a un Thread*
*this.startDownload();*
*System.out.println("Form1 Dentro de getDownloadFile, Despu�s de startDownload()");*
*//if (pane.showProgressDialog() == -1) {*
*while (!this.isDone()){*
*System.out.println("No est� acabada la descarga");*
*if (this.isDone()){*
*System.out.println("Thread ACABADO --> Enviamos a puente el archivo");*
*puente = this.byteArray.toByteArray();*
*System.out.println("Form1 getDownloadFile() tama�o puente: " + puente.length);*
*else{*
*Thread.sleep(5000L);*
*// throw new RuntimeException("Proc�s de desc�rrega del document a signar cancel�lat.");*
catch (HeadlessException e) {
//javascript("onSignError", new String[] {
//(new StringBuilder("UI: ")).append(e.getMessage()).toString()});
e.printStackTrace();
catch (MalformedURLException e) {
//javascript("onSignError", new String[] {
//(new StringBuilder("CMS: ")).append(e.getMessage()).toString()});
e.printStackTrace();
catch (HttpSenderException e) {
//javascript("onSignError", new String[] {
//(new StringBuilder("CMS: ")).append(e.getMessage()).toString()});
e.printStackTrace();
catch (InterruptedException e) {
//javascript("onSignError", new String[] {
//(new StringBuilder("CMS: ")).append(e.getMessage()).toString()});
e.printStackTrace();
//System.out.println("Form1 getDownloadFile() tama�o puente: " + puente.length);
return puente;
public void updateStatus(final int i){
Runnable doSetProgressBarValue = new Runnable() {
public void run() {
progressBar.setValue(i);
SwingUtilities.invokeLater(doSetProgressBarValue);
public void startDownload() {
System.out.println("Form1 Inicio startDownload()");
System.out.println("Form1 Dentro de startDownload, antes de definir la subclase SwingWorker");
System.out.println(done);
worker = new SwingWorker() {
public Object construct() {
System.out.println("Form1 Dentro de startDownload, dentro de construct(), Antes de entrar en doWork()");
return doWork();
public void finished() {
System.out.println("Form1 Dentro de startDownload, dentro de finished(), Antes de asignar done = true");
System.out.println(done);
done = true;
System.out.println("Form1 Dentro de startDownload, dentro de finished(), Despu�s de asignar done = true");
System.out.println(done);
statusLabel.setText("Completado, tama�o del archivo: " + (byteArray.size() / 1024) + "KB");
System.out.println("Form1 Dentro de startDownload, antes de worker.start()");
worker.start();
System.out.println("Form1 Dentro de startDownload, antes de salir de startDownload");
System.out.println(done);
System.out.println("Form1 Dentro de startDownload, despu�s de worker.start()");
* M�todo doWork()
* Este m�todo descarga por partes el archivo que es necesario descargar, adem�s de actualizar
* la barra de carga del proceso de carga de la GUI.
public Object doWork() {
System.out.println("Form1 doWork() this.byteArray.size(): " + this.byteArray.size());
try {
byte buffer[] = new byte[1024];
for(int c = 0; (c = this.file.read(buffer)) > 0;) {
this.currentProgress++;
updateStatus(this.currentProgress);
this.byteArray.write(buffer, 0, c);
this.byteArray.flush();
this.file.close();
this.currentProgress = totalCicles;
updateStatus(this.currentProgress);
} catch(IOException e) {
e.printStackTrace();
System.out.println("Form1 doWork() FINAL this.byteArray.size(): " + this.byteArray.size());
//done = true;
System.out.println("AHORA DONE = TRUE");
return "Done";
public boolean isDone() {
return this.done;
FormularioApplet class (main)
package es.cambrabcn.signer.gui;
import java.awt.Color;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.security.Security;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.swing.SwingUtilities;
import netscape.javascript.JSObject;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import sun.security.provider.Sun;
import be.cardon.cryptoapi.provider.CryptoAPIProvider;
public class FormularioApplet extends java.applet.Applet {
//Variables globales
int paso = 0;
private static final String JS_ONLOAD = "onLoad";
private static final String JS_ONLOADERROR = "onLoadError";
private static final int SIGNATURE_PDF = 1;
private static final int SIGNATURE_XML = 2;
//private String signButtonValue;
private int signatureType;
private String documentToSign;
private String pdfSignatureField;
private Vector<String> outputFilename;
private Color appletBackground = new Color(255, 255, 255);
private Vector<byte[]> ftbsigned;
* Initializes the applet FormularioApplet
public void init(){
try {
SwingUtilities.invokeLater(new Runnable() {
//SwingUtilities.invokeAndWait(new Runnable() {
//java.awt.EventQueue.invokeAndWait(new Runnable() {
public void run() {
try{
readParameters();
initComponents();
catch(FileNotFoundException e){
javascript(JS_ONLOADERROR, new String[] {
(new StringBuilder("Init: ")).append(e.getMessage()).toString()});
e.printStackTrace();
catch(IOException e) {
javascript(JS_ONLOADERROR, new String[] {
(new StringBuilder("Init: ")).append(e.getMessage()).toString()});
e.printStackTrace();
catch (Exception e) {
javascript(JS_ONLOADERROR, new String[] {
(new StringBuilder("Init: ")).append(e.getMessage()).toString()});
e.printStackTrace();
javascript(JS_ONLOAD, null);
/** This method is called from within the init() method to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" C�digo Generado ">
private void initComponents() {
this.setSize(350, 450);
appletPanel = new javax.swing.JPanel();
jPanel1 = new javax.swing.JPanel();
jTextField1 = new javax.swing.JLabel();
jPanel2 = new javax.swing.JPanel();
label = new javax.swing.JLabel();
jPanel3 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setLayout(new java.awt.BorderLayout());
appletPanel.setBackground(new java.awt.Color(255, 255, 255));
appletPanel.setMaximumSize(new java.awt.Dimension(350, 430));
appletPanel.setMinimumSize(new java.awt.Dimension(350, 430));
appletPanel.setPreferredSize(new java.awt.Dimension(350, 430));
jPanel1.setBackground(new java.awt.Color(255, 255, 255));
jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 102, 204)));
jTextField1.setFont(new java.awt.Font("Arial", 1, 18));
jTextField1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jTextField1.setText("SIGNATURA ELECTRONICA");
org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 308, Short.MAX_VALUE)
.addContainerGap())
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 24, Short.MAX_VALUE)
.addContainerGap())
jPanel2.setBackground(new java.awt.Color(255, 255, 255));
jPanel2.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 102, 204)));
label.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
label.setIcon(new javax.swing.ImageIcon("C:\\java\\workspaces\\cambrabcn\\firmasElectronicas\\logo.gif"));
org.jdesktop.layout.GroupLayout jPanel2Layout = new org.jdesktop.layout.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.add(label, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 308, Short.MAX_VALUE)
.addContainerGap())
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.add(label)
.addContainerGap(229, Short.MAX_VALUE))
jPanel3.setBackground(new java.awt.Color(255, 255, 255));
jPanel3.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 102, 204)));
//this.jButton1.setVisible(false);
//this.jButton2.setVisible(false);
jButton1.setText("Seg\u00fcent");
jButton1.setAlignmentX(0.5F);
//Cargamos el primer formulario en el JPanel2
loadFirstForm();
//Modificamos el texto del bot�n y el contador de pasos.
//this.jButton1.setText("Siguiente");
//this.jButton1.setVisible(true);
//this.jButton2.setVisible(true);
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
jButton2.setText("Cancel\u00b7lar");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
org.jdesktop.layout.GroupLayout jPanel3Layout = new org.jdesktop.layout.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap()
.add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 94, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 112, Short.MAX_VALUE)
.add(jButton2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 102, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel3Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jButton2)
.add(jButton1))
.addContainerGap())
org.jdesktop.layout.GroupLayout appletPanelLayout = new org.jdesktop.layout.GroupLayout(appletPanel);
appletPanel.setLayout(appletPanelLayout);
appletPanelLayout.setHorizontalGroup(
appletPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, appletPanelLayout.createSequentialGroup()
.addContainerGap()
.add(appletPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
appletPanelLayout.setVerticalGroup(
appletPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, appletPanelLayout.createSequentialGroup()
.addContainerGap()
.add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jPanel2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jPanel3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
add(appletPanel, java.awt.BorderLayout.CENTER);
}// </editor-fold>
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
this.destroy();
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
changeForms(this.paso);
// Declaraci�n de variables - no modificar
private javax.swing.JPanel appletPanel;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JLabel jTextField1;
private javax.swing.JLabel label;
// Fin de declaraci�n de variables
* M�todo readParameters
* M�todo que inicializa los valores de los par�metros internos, recibidos por par�metro.
private void readParameters() throws FileNotFoundException, IOException {
???????????????? deleted for the forum
addSecurityProviders();
* M�tode loadFirstForm
* Aquest m�tode carrega a jPanel2 el formulari que informa sobre la c�rrega dels arxius
private void loadFirstForm(){
//Form1 f1 = new Form1(stream, i + 1, fileURL.size(), sender.returnCurrentContentLength(), appletBackground);
//Form1 f1 = new Form1(fileURL.size(), sender.returnCurrentContentLength());
Form1 f1 = new Form1();
//Lo dimensionamos y posicionamos
f1.setSize(310, 150);
f1.setLocation(10, 110);
//A�adimos el formulario al JPanel que lo contendr�
this.jPanel2.add(f1);
//Validem i repintem el JPanel
jPanel2.validate();
jPanel2.repaint();
//Descarreguem l'arxiu a signar
*System.out.println("FormularioApplet Dentro de loadFirstForm(), antes de llamar a getDownloadFile()");*
*byte obj[] = f1.getDownloadedFile(this.documentToSign);*
if (obj == null){
System.out.println("Lo que devuelve f1.getDownloadedFile(this.documentToSign) es NULL");
else{
System.out.println("Lo que devuelve f1.getDownloadedFile(this.documentToSign) NO es NULL");
System.out.println("obj: " + obj.length);
this.ftbsigned.add(obj);
System.out.println("FormularioApplet Dentro de loadFirstForm(), despu�s de llamar a getDownloadFile()");
//Indicamos que el primer paso ya se ha efectuado
this.paso++;
* M�tode changeForms
* Aquest m�tode carrega a jPanel2 un formulari concret segons el valor de la variable global "paso"
private void changeForms(int paso){
/*A cada paso se cargar� en el JPanel y formulario diferente
* Paso previo: Se realiza en la inicializaci�n, carga el formulario, descarga el archivo y muestra la barra de carga.
* Case 1: Se carga el formulario de selecci�n de tipo de firma.
* Case 2: Se carga el formulario de datos de la persona que firma.
this.paso = paso;
switch(paso){
case 1:
//Creamos un objeto de formulario (seleccion de tipo de firma)
Form2 f2 = new Form2();
//Lo dimensionamos y posicionamos
f2.setSize(310, 185);
f2.setLocation(10, 110);
//Quitamos el formulario 1 y a�adimos el formulario 2 al JPanel
this.jPanel2.remove(1);
this.jPanel2.add(f2);
//Validem i repintem el JPanel
jPanel2.validate();
jPanel2.repaint();
//Modificamos el contador de pasos.
this.paso++;
break;
case 2:
//Creamos un objeto de formulario (seleccion de tipo de firma)
Form3 f3 = new Form3();
//Lo dimensionamos y posicionamos
f3.setSize(310, 175);
f3.setLocation(15, 130);
//Quitamos el formulario 1 y a�adimos el formulario 3 al JPanel
this.jPanel2.remove(1);
this.jPanel2.add(f3);
//Validem i repintem el JPanel
jPanel2.validate();
jPanel2.repaint();
//Modificamos el texto del bot�n y el contador de pasos.
this.jButton1.setText("Finalizar");
this.paso++;
break;
default:
//Finalizar el Applet
//C�digo que se encargue de guardar el archivo en el disco duro del usuario
break;
private void addSecurityProviders() throws FileNotFoundException, IOException {
Security.addProvider(new CryptoAPIProvider());
if (signatureType == SIGNATURE_PDF) {
Security.addProvider(new BouncyCastleProvider());
else {
Security.addProvider(new Sun());
private File createOutputFile(String filename, int index) {
return new File((String)outputFilename.get(index));
protected Object javascript(String function, String args[]) throws RuntimeException {
//Remove
if (true) return null;
try {
Vector<String> list = new Vector<String>();
if(args != null) {
for(int i = 0; i < args.length; i++) {
list.addElement(args);
if(list.size() > 0) {
Object objs[] = new Object[list.size()];
list.copyInto(objs);
return JSObject.getWindow(this).call(function, objs);
} catch(UnsatisfiedLinkError e) {
e.printStackTrace();
throw new RuntimeException((new StringBuilder()).append(e).append("\nFunci�: ").append(function).toString());
} catch(Throwable e) {
e.printStackTrace();
throw new RuntimeException((new StringBuilder()).append(e).append("\nFunci�: ").append(function).toString());
return JSObject.getWindow(this).call(function, new Object[0]);
Edited by: Kefalegereta on Oct 31, 2007 3:54 AM
Edited by: Kefalegereta on Oct 31, 2007 4:00 AMLook at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
Cheers, Tom -
Problem with JMenus that Persist - Is this a Java bug?
I am having a problem with JMenus that persist. By this I mean
that my drop down menus persist on the screen even after they have
been selected.
I've checked the Java bug database, and the following seems
to come closest to my problem:
Bug ID: 4235188
JPopupMenus and JMenus persist when their JFrame becomes visible
State: Closed, not a bug
http://developer.java.sun.com/developer/bugParade/bugs/4235188.html
This page says that the matter is closed and is not a bug. The
resolution of this matter printed at the bottom of the page
is completely abstruse to me and I would appreciate any
comments to understand what they are talking about.
The code at the end of my message illustrates my problem.
1. Why should paintComponent() make any difference to
Menu behavior?
2. Is this a bug?
3. What's the workaround if I have to paint() or repaint()?
Thanks
Tony Lin
// Example of Menu Persistence Problem
// Try running this with line 41, paintComponent(), and without line 41
// Menus behave normally if line 41 is commented out
// If line 41 exists, menus will persist after they have been selected
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class P2 extends JPanel {
JMenuItem[] mi;
public P2() {
JFrame thisFrame = new JFrame();
thisFrame.getContentPane().add(this);
JMenu menu = new JMenu("My Menu");
JMenuBar mb = new JMenuBar();
mi = new JMenuItem[4];
for (int i=0; i<mi.length; i++) {
mi[i] = new JMenuItem("Menu Item " + String.valueOf(i));
menu.add(mi);
mb.add(menu);
thisFrame.setJMenuBar(mb);
thisFrame.setSize(400,200);
thisFrame.setLocation(150,200);
thisFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
thisFrame.setVisible(true);
public void paintComponent(Graphics g) {} //Affects menu behavior!
public static void main(String[] args) {
new P2();Well, my understanding of the way painting works is that a component doesn't UNPAINT itself. Instead a message is sent to the component under the coordinates of the menu to REPAINT itself.
In your demo program the JFrame is the component under the JMenu. The paintComponent() method of JFrame is empty, so nothing gets repainted.
I added super.paintComponent(g); to the method and everything works fine.
Maybe you are looking for
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