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Extension of JDialog (hidden?) not showing up in front of parent JFrame?

I have an application I'm making for a game to automatically update a game client.
Once you press Launch, it will open up my DownloadFrame (extends JDialog), and will look like this:
If you click the icon for the application in the taskbar, (maybe Windows 8 is the problem?) it will minimize the application like usual. However when you go to maximise the application again, the JDialog will be hidden, I'm assuming, behind the parent. It looks like this:
Here's my code for my extension of JDialog. Apologies in advance for it being messy.
public class DownloadFrame extends JDialog implements Runnable {
private static final long serialVersionUID = -8764984599528942303L;
private Background frame;
private ImageIcon[] gifs;
private JLabel spinner;
public DownloadFrame() {
super(Loader.application, false);
setLayout(null);
setUndecorated(true);
setAutoRequestFocus(true);
new Thread(this).start();
generateBackground();
generateButton();
generateGif();
}
private void generateBackground() {
frame = new Background("sub_background.png");
setSize(frame.getWidth(), frame.getHeight());
setBackground(new Color(1.0f, 1.0f, 1.0f, 0.0f));
setLocationRelativeTo(null);
setLocation(this.getX(), this.getY() + 5);
setLayout(null);
setContentPane(frame);
}
private void generateGif() {
gifs = Utils.generateGifImages();
spinner = new JLabel(gifs[0]);
spinner.setBounds(70, 30, gifs[0].getIconWidth(), gifs[0].getIconHeight());
add(spinner);
}
private HoverableButton cancel;
public HoverableButton getCancelButton() {
return cancel;
}
private void generateButton() {
cancel = new HoverableButton(Settings.CANCEL_BUTTON, 75, 145);
cancel.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent event) {
/*
* TODO -
* stop the download in progress
*/
for (HoverableButton button : Loader.application.getPrimaryButtons()) {
button.setActive(true);
button.setVisible(true);
}
dispose();
}
});
add(cancel);
}
private int cycleCount;
private void cycleGif() {
if (spinner == null) {
return;
}
cycleCount++;
if (cycleCount > 7) {
cycleCount = 0;
}
spinner.setIcon(gifs[cycleCount]);
}
#Override
public void run() {
while (true) {
cycleGif();
try {
Thread.sleep(100L);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
In case it's needed, here's my usage of it. Most of the stuff can be ignored I'm sure, it's simply there to hide the four buttons while the download is in progress.
((HoverableButton) components[2]).addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
HoverableButton source = (HoverableButton) components[2];
if (source.isActive()) {
try {
Thread.sleep(500L);
} catch (Exception ex) {
ex.printStackTrace();
}
if (panel == null) {
panel = new DownloadFrame();
panel.setVisible(true);
} else {
panel.setVisible(true);
panel.getCancelButton().removeHighlight();
}
for (HoverableButton button : getPrimaryButtons()) {
button.setActive(false);
button.setVisible(false);
button.removeHighlight();
}
/*
* TODO -
* handle checking for updates / downloading updates
*/
}
}
});

However when you go to maximise the application again, the JDialog will be hidden, I'm assuming, behind the parent
Yes. When you create the JDialog, you need to specify the "owner" JFrame of the dialog in the constructor.
So you must create and make the JFrame and make the frame visible before you create the dialog.

The text in dialog box is missing

Hi I have a java program. I use Eclipse as my tool. Also I have installed Java 7 Update 51, Java SE Development Kit 7 Update 51. My code to open the dialog box for selecting the file. It works, but the problem is the text on button or textbox on dialog box is missing sometime.
Would some one tell me how to solve this issue. Thanks in advance
There is my code:
package MyPackage;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.SwingUtilities;
import javax.swing.filechooser.*;
import java.io.*;
public class MainForm extends JFrame implements ActionListener {
/**
* #param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new MainForm();
}
public MainForm(){
super("Example");
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
// Name the JMenu & Add Items
JMenu menu = new JMenu("File");
menu.add(makeMenuItem("Open"));
menu.add(makeMenuItem("Save"));
menu.add(makeMenuItem("Quit"));
// Add JMenu bar
JMenuBar menuBar = new JMenuBar();
menuBar.add(menu);
setJMenuBar(menuBar);
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
//setSize(600, 300);
//setLocation(200, 200);
setVisible(true);
}
public void actionPerformed(ActionEvent e) {
// Menu item actions
String command = e.getActionCommand();
if (command.equals("Quit")) {
System.exit(0);
} else if (command.equals("Open")) {
// Open menu item action
JFileChooser fileChooser = new JFileChooser();
int returnVal = fileChooser.showOpenDialog(MainForm.this);
if (returnVal == fileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
// Load file
} else if (returnVal == JFileChooser.CANCEL_OPTION ) {
// Do something else
}
}
else if (command.equals("Save")) {
// Save menu item action
System.out.println("Save menu item clicked");
}
}
private JMenuItem makeMenuItem(String name) {
JMenuItem m = new JMenuItem(name);
m.addActionListener(this);
return m;
}
}

A problem in your code is in which thread is being executed. Most Swing methods can only be executed in a very specific thread called Event Dispatch Thread. Because you are not doing this correctly your application will tend to have inconsistent errors. The larger it gets the easier it is that something goes wrong.
To properly execute in the EDT you need to change your main method to:
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run()
{
new MainForm();
}
});
}
invokeLater schedules the execution of the MainForm constructor to the EDT, so that the GUI initialization code is executed in the proper thread.
I don't know if this alone will solve the problem but will surely solve future non-reproducible missbehaviours. I've personally seen some threading problems other times with JFileChooser, there are or have been several reported bugs with the thread management of this class.
Note that this is a core rule of Swing that even the Hello world complies.

Java swing CheckBox not selected while display Conformation Dialog

I am working on an application in which I have developed a window with three check boxes. When first and second check boxes are selected, new windows will be opened as desired. The third check box is for closing the application. When Exit check box is selected, it is showing the conformation Dialog as desired but Exit check box is not ticked.
I could not trace out the issue here. Please help me to resolve this issue!
package jcheckbox;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class InitiaaWindow extends JPanel {
static JFrame frame = new JFrame("Credit Contract Validation");
private static final long serialVersionUID = 1L;
JCheckBox jValidateECOUT;
JCheckBox jValidateSuperDeals;
JCheckBox jEXIT;
JLabel jlbPicture,jlbPicture1;
CheckBoxListener myListener = null;
public InitiaaWindow() {
myListener = new CheckBoxListener();
jValidateECOUT = new JCheckBox("ValidateECOUT");
jValidateECOUT.setMnemonic(KeyEvent.VK_C);
jValidateECOUT.setSelected(false);
jValidateECOUT.addItemListener(myListener);
jValidateSuperDeals = new JCheckBox("ValidateSuperDeals");
jValidateSuperDeals.setMnemonic(KeyEvent.VK_G);
jValidateSuperDeals.setSelected(false);
jValidateSuperDeals.addItemListener(myListener);
jEXIT = new JCheckBox("EXIT");
jEXIT.setMnemonic(KeyEvent.VK_G);
jEXIT.setSelected(false);
jEXIT.addItemListener(myListener);
jlbPicture = new JLabel(new ImageIcon("src/jcheckbox/image.jpg"));
jlbPicture1 = new JLabel(new ImageIcon("src/jcheckbox/image1.jpg"));
JPanel jplCheckBox = new JPanel();
jplCheckBox.setLayout(new GridLayout(0, 1));
jplCheckBox.add(jValidateECOUT);
jplCheckBox.add(jValidateSuperDeals);
jplCheckBox.add(jEXIT);
setLayout(new BorderLayout());
add(jplCheckBox, BorderLayout.WEST);
add(jlbPicture1, BorderLayout.CENTER);
add(jlbPicture, BorderLayout.EAST);
setBorder(BorderFactory.createEmptyBorder(40,40,40,40));
}
class CheckBoxListener implements ItemListener {
public void itemStateChanged(ItemEvent e) {
if (jValidateECOUT.isSelected())
{
try {
UIPack.UI.myMethod(null);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
else if (jValidateSuperDeals.isSelected())
{
try {
ValidateSuperDealsUIPack.UI.ValidateSuperDealsUI(null);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
else if (jEXIT.isSelected())
{
int dialogButton = JOptionPane.YES_NO_OPTION;
int dialogResult = JOptionPane.showConfirmDialog(null, "Would you like to close the application", "Conformation message",dialogButton);
if(dialogResult==0)
System.exit(1);
else
JOptionPane.getRootFrame().dispose();
}
}
}
public static void main(String s[]) {
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setContentPane(new InitiaaWindow());
frame.pack();
frame.setVisible(true);
}
}

Since showConfirmDialog creates a modal dialog until the dialog is closed the execution of item selection event may not propagate to other listeners which might be responsible for updating the display of the checkbox.
If you click 'No' in the dialog, does the checkbox update properly? If yes then you can create the dialog in a separate runnable task using SwingUtilities.invokeLater this will ensure the current processing of selection event completes before the modal dialog is opned.

You can add
jEXIT.setSelected(true);
before
int dialogButton = JOptionPane.YES_NO_OPTION;

1.Sorry, but your code style is really terrible (IMHO, I don't want you to be dissappointed of that).
2.Use ActionListener instead of ItemListener for JCheckBox. And check the source of action before process it:
ActionListener listener = new ActionListener({
#Override
public void actionPerfomed(ActionEvent ae) {
if (ae.getSource().equals(comboBox1) {
//process 1
} else if (ae.getSource().equals(comboBox2) {
//process 2
} else if (ae.getSource().equals(comboBox3) {
//process 3
}
}
});
comboBox1.add(listener);
comboBox2.add(listener);
comboBox3.add(listener);
3.If you want to show modal dialogs on action events, it is good to use SwingUtilities.invokeLater() for that, because your action' source should repaint after action perfomed.

Java in background of windows for copying text from the browser directly to text file

Is it possible to listen to events from browser with Java?
The main task is to add command "copy to file" to pop-up menu of right click of the mouse. This command must add selected text in browser, in Notepad, in winword (any selectable text) to specific text file.
I've just tried code which adds icon to tray but I do not know whether it can it be developed for solving my task.
import java.awt.*;
import java.awt.event.*;
public class SystemTrayTest
{
public SystemTrayTest()
{
final TrayIcon trayIcon;
if (SystemTray.isSupported()) {
SystemTray tray = SystemTray.getSystemTray();
Image image = Toolkit.getDefaultToolkit().getImage("tray.gif");
MouseListener mouseListener = new MouseListener() {
public void mouseClicked(MouseEvent e) {
System.out.println("Tray Icon - Mouse clicked!");
}
public void mouseEntered(MouseEvent e) {
System.out.println("Tray Icon - Mouse entered!");
}
public void mouseExited(MouseEvent e) {
System.out.println("Tray Icon - Mouse exited!");
}
public void mousePressed(MouseEvent e) {
System.out.println("Tray Icon - Mouse pressed!");
}
public void mouseReleased(MouseEvent e) {
System.out.println("Tray Icon - Mouse released!");
}
};
ActionListener exitListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Exiting...");
System.exit(0);
}
};
PopupMenu popup = new PopupMenu();
MenuItem defaultItem = new MenuItem("Exit");
defaultItem.addActionListener(exitListener);
popup.add(defaultItem);
trayIcon = new TrayIcon(image, "Tray Demo", popup);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
trayIcon.displayMessage("Action Event",
"An Action Event Has Been Peformed!",
TrayIcon.MessageType.INFO);
}
};
trayIcon.setImageAutoSize(true);
trayIcon.addActionListener(actionListener);
trayIcon.addMouseListener(mouseListener);
// Depending on which Mustang build you have, you may need to uncomment
// out the following code to check for an AWTException when you add
// an image to the system tray.
// try {
tray.add(trayIcon);
// } catch (AWTException e) {
// System.err.println("TrayIcon could not be added.");
// }
} else {
System.err.println("System tray is currently not supported.");
}
}
/**
* #param args the command line arguments
*/
public static void main(String[] args)
{
SystemTrayTest main = new SystemTrayTest();
}
}

You are talking about accessing clipboard events. this may helps you. How do we get notified about system clipboard events?

JOptionPane.showMessageDialog wait until OK is clicked?

This might be a very simple thing that I'm overlooking, but I just can't seem to figure it out.
I have the following method that updates a JTable:
class TableModel extends AbstractTableModel {
public void updateTable() {
try {
// update table here
...
} catch (NullPointerException npe) {
isOpenDialog = true;
JOptionPane.showMessageDialog(null, "No active shares found on this IP!");
isOpenDialog = false;
}
}
}
However, I don't want isOpenDialog boolean to be set to false until the OK button on the message dialog is pressed, because if a user presses enter it will activate a KeyListener event on a textfield and it triggers that entire block of code again if it's set to false.
Part of the KeyListener code is shown below:
public class KeyReleased implements KeyListener {
...
#Override
public void keyReleased(KeyEvent ke) {
if(txtIPField.getText().matches(IPADDRESS_PATTERN)) {
validIP = true;
} else {
validIP = false;
}
if (ke.getKeyCode() == KeyEvent.VK_ENTER) {
if (validIP && !isOpenDialog) {
updateTable();
}
}
}
}
Does JOptionPane.showMessageDialog() have some sort of mechanism that prevents executing the next line until the OK button is pressed? Thank you.

The JOptionPane creates a modal dialog and so the line beyond it will by design not be called until the dialog has been dealt with (either one of the buttons have been pushed or the close menu button has been pressed).
More important, you shouldn't be using a KeyListener for this sort of thing. If you want to have a JTextField listen for press of the enter key, add an ActionListener to it.

An easy work around to suite your needs is the use of showConfirmDialog(...), over showMessageDialog(), this lets you take the input from the user and then proceed likewise. Do have a look at this example program, for clarification :-)
import javax.swing.*;
public class JOptionExample
{
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
int selection = JOptionPane.showConfirmDialog(
null
, "No active shares found on this IP!"
, "Selection : "
, JOptionPane.OK_CANCEL_OPTION
, JOptionPane.INFORMATION_MESSAGE);
System.out.println("I be written" +
" after you close, the JOptionPane");
if (selection == JOptionPane.OK_OPTION)
{
// Code to use when OK is PRESSED.
System.out.println("Selected Option is OK : " + selection);
}
else if (selection == JOptionPane.CANCEL_OPTION)
{
// Code to use when CANCEL is PRESSED.
System.out.println("Selected Option Is CANCEL : " + selection);
}
}
});
}
}

You can get acces to the OK button if you create optionpanel and custom dialog. Here's an example of this kind of implementation:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* #author OZBORN
*/
public class TestyDialog {
static JFrame okno;
static JPanel panel;
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
zrobOkno();
JButton przycisk =new JButton("Dialog");
przycisk.setSize(200,200);
panel.add(przycisk,BorderLayout.CENTER);
panel.setCursor(null);
BufferedImage cursorImg = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
przycisk.setCursor(Toolkit.getDefaultToolkit().createCustomCursor(
cursorImg, new Point(0, 0), "blank cursor"));
final JOptionPane optionPane = new JOptionPane(
"U can close this dialog\n"
+ "by pressing ok button, close frame button or by clicking outside of the dialog box.\n"
+"Every time there will be action defined in the windowLostFocus function"
+ "Do you understand?",
JOptionPane.INFORMATION_MESSAGE,
JOptionPane.DEFAULT_OPTION);
System.out.println(optionPane.getComponentCount());
przycisk.addActionListener(new ActionListener(){
#Override
public void actionPerformed(ActionEvent e) {
final JFrame aa=new JFrame();
final JDialog dialog = new JDialog(aa,"Click a button",false);
((JButton)((JPanel)optionPane.getComponents()[1]).getComponent(0)).addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
aa.dispose();
}
});
dialog.setContentPane(optionPane);
dialog.pack();
dialog.addWindowFocusListener(new WindowFocusListener() {
#Override
public void windowLostFocus(WindowEvent e) {
System.out.println("Zamykam");
aa.dispose();
}
#Override public void windowGainedFocus(WindowEvent e) {}
});
dialog.setVisible(true);
}
});
}
public static void zrobOkno(){
okno=new JFrame("Testy okno");
okno.setLocationRelativeTo(null);
okno.setSize(200,200);
okno.setPreferredSize(new Dimension(200,200));
okno.setVisible(true);
okno.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel=new JPanel();
panel.setPreferredSize(new Dimension(200,200));
panel.setLayout(new BorderLayout());
okno.add(panel);
}
}

Try this,
catch(NullPointerException ex){
Thread t = new Thread(new Runnable(){
public void run(){
isOpenDialog = true;
JOptionPane.setMessageDialog(Title,Content);
}
});
t.start();
t.join(); // Join will make the thread wait for t to finish its run method, before
executing the below lines
isOpenDialog = false;
}