GUI components not display

Eranga · #1 (**permalink**) 03-11-2008, 04:21 AM

Hi all,

I've create an application that open a dialog on tray icon click. Tray icon is ok now and I try to add a dialog with some controls. Actually two buttons are there right now. Here is the full code I have try.

Code:

import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.Toolkit;

public class Main extends JFrame 
{
    protected JButton buttonOne, buttonTwo;
    
    public Main()
    {
        
       buttonOne = new JButton("Ok");
       buttonOne.setVerticalTextPosition(AbstractButton.CENTER);
       buttonOne.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for left-to-right locales
       //buttonOne.setMnemonic(KeyEvent.VK_D);
       //buttonOne.setActionCommand("disable");
        
       buttonTwo = new JButton("Exit");
       buttonTwo.setVerticalTextPosition(AbstractButton.BOTTOM);
       buttonTwo.setHorizontalTextPosition(AbstractButton.CENTER);
      // buttonTwo.setMnemonic(KeyEvent.VK_M);
        
    // Set the actions
        buttonOne.addActionListener(this);
        //buttonTwo.addActionListener(this);
        
    // Add components to the container
        add(buttonOne);
        add(buttonTwo);
        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);

                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.");
        }
    }
    
    public static void createAndShowGUI()
    {
        JFrame frame = new JFrame("Main Frame!");
        frame.setSize(new Dimension(300, 300));
        
       frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
       int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
       int frameHeight = frame.getHeight();
       int taskbarHeight = screenHeight - frameHeight;
       
       System.out.println(screenHeight);
       System.out.println(frameHeight);
       System.out.println(taskbarHeight);
       
        Main newContentPane = new Main();
        //newContentPane.setOpaque(true); // Opaque
        frame.setContentPane(newContentPane);
        
        frame.pack();
        frame.setVisible(true);
        
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }    
    
    public static void main(String[] args)
    {
        Main main = new Main();
    }     
}

Can you guys tell me why the dialog is not displayed. I'm weak on AWT/Swing implements.

Thanks.

hardwired · #2 (**permalink**) 03-11-2008, 06:16 PM

You can get some images to use from this reference page Steal Our Code.
Under the header/link
"Learning to Use the System Tray API in Java SE 6"
click on the link:
"Download an Executable JAR File (Source Code Included)"
You can extract the three gif images from the jar file.
See Using JAR Files: The Basics if you want more info about jar files.
You app works okay now.

Code:

import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.Toolkit;

public class SysTray implements ActionListener
{
    protected JButton buttonOne, buttonTwo;

    public void actionPerformed(ActionEvent e)
    {
        JButton button = (JButton)e.getSource();
        String ac = button.getActionCommand();

        // Another way to identify source component:
        if(ac.equals("disable"))
            System.out.println("ActionEvent set by buttonOne");

        if(button == buttonOne)
            System.out.println("Ok");
        if(button == buttonTwo)
            System.exit(0);
    }
    
    private Box getContent()
    {
        buttonOne = new JButton("Ok");
        buttonOne.setVerticalTextPosition(AbstractButton.CENTER);
        //aka LEFT, for left-to-right locales
        buttonOne.setHorizontalTextPosition(AbstractButton.LEADING);
        //buttonOne.setMnemonic(KeyEvent.VK_D);
        buttonOne.setActionCommand("disable");
        
        buttonTwo = new JButton("Exit");
        buttonTwo.setVerticalTextPosition(AbstractButton.BOTTOM);
        buttonTwo.setHorizontalTextPosition(AbstractButton.CENTER);
        // buttonTwo.setMnemonic(KeyEvent.VK_M);
        
        // Set the actions
        buttonOne.addActionListener(this);
        buttonTwo.addActionListener(this);

        Box box = Box.createHorizontalBox();
        // Add components to the container
        box.add(Box.createHorizontalGlue());
        box.add(buttonOne);
        box.add(Box.createHorizontalGlue());
        box.add(buttonTwo);
        box.add(Box.createHorizontalGlue());
        return box;
    }

    private void initSystemTray()
    {
        final TrayIcon trayIcon;

        if (SystemTray.isSupported()) 
        {
            SystemTray tray = SystemTray.getSystemTray();
            Image image = Toolkit.getDefaultToolkit()//.getImage("tray.gif");
                                 .createImage("images/sysTray/logo.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);

            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.");
        }
    }

    public static void createAndShowGUI()
    {
        JFrame frame = new JFrame("Main Frame!");
        frame.setSize(new Dimension(300, 300));

//        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
        int frameHeight = frame.getHeight();
        int taskbarHeight = screenHeight - frameHeight;

        System.out.println(screenHeight);
        System.out.println(frameHeight);
        System.out.println(taskbarHeight);

        SysTray sysTray = new SysTray();
        sysTray.initSystemTray();
        frame.getContentPane().add(sysTray.getContent(), "Last");

//        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args)
    {
        createAndShowGUI();
    }
}

Eranga · #3 (**permalink**) 03-12-2008, 03:16 AM

Thanks a lot pal. I got that where I'm going wrong.