JTextArea in Full-Screen Exclusive Mode

[Willi]

Can we put a JTextArea in a frame to display in Fullscreen Exlcusive mode. I tried and the result is depressed.

If I put these lines of code in my program, the full-screen exclusive mode is not showed up :

		JTextArea textArea = new JTextArea(20, 30);
		textArea.setLineWrap(true);
		textArea.setEditable(false);
		
		JScrollPane scrollPane = new JScrollPane(textArea);

                JPanel panel = new JPanel();
                panel.add(scrollPane);

But then I removed it and the full-screen mode is showed up properly. Is there any idea about this problem?

If JTextArea is the problem then is there a way to put multiple lines text on a JFrame in Fullscreen Exclusive mode?

Thanks in advance!

[Fubarable]

Perhaps I'm missing something (which happens too often), but I don't see anything in that code that would prevent full-screen mode from working. You may wish to create and post a small workable program that compiles, runs, requires no external resources, and which demonstrates your problem (an SSCCE), and let us play with it. Much luck.

[Willi]

Thanks for replying. Here is the code, I hope you can spend a little time to look through. The program is long, but it's straightforward :

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

import javax.swing.*;

public class FullScreenTest
{
	public static void main(String[] args)
	{
		EventQueue.invokeLater(new Runnable()
		{
			public void run()
			{
				GraphicsEnvironment en = GraphicsEnvironment.getLocalGraphicsEnvironment();
				GraphicsDevice[] devices = en.getScreenDevices();
				
				for (int i = 0; i < devices.length ; i++)
				{
					FullScreenFrame frame = new FullScreenFrame(devices[i]);
					frame.enterFullScreen();
						    }										
				}
			});
	}
}

class FullScreenFrame extends JFrame
{
	private GraphicsDevice graphicsDevice;
	private DisplayMode originalMode;

	private JPanel northPanel;
	private JPanel southPanel;
	private JTextArea textArea;
	private JButton exitButton;
	
	public FullScreenFrame(final GraphicsDevice graphicsDevice) 
	{
		this.graphicsDevice = graphicsDevice;
		
		// save the original display mode for restoring to original mode purpose
		originalMode = graphicsDevice.getDisplayMode();
	
		// this panel is used to hold the JTextArea
		northPanel = new JPanel();
		
		// create a text area to hold text
		textArea = new JTextArea(20, 30);
		textArea.setLineWrap(true);		
		textArea.setEditable(false);
		
		JScrollPane scrollPane = new JScrollPane(textArea);
		northPanel.add(scrollPane);
	
		// a JButton to exit the fullscreen exclusive mode
		exitButton = new JButton("Exit");
		southPanel = new JPanel();
		southPanel.add(exitButton);
	
		add(northPanel, BorderLayout.NORTH);
		add(southPanel, BorderLayout.SOUTH);
        
		// Register an ActionListener for the exitButton
		exitButton.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent event)
			{
				// Restore the original display mode
				graphicsDevice.setDisplayMode(originalMode);
				graphicsDevice.setFullScreenWindow(null);
				
				// Exit the application
				System.exit(0);
			}
		}); 
	}

	
	// Method to enter the fullscreen exclusive mode
	public void enterFullScreen()
	{
		// Check whether the full-screen exclusive mode is supported on this system
		if(graphicsDevice.isFullScreenSupported())
		{
			setUndecorated(true);
			setResizable(false);
			setIgnoreRepaint(true);
			
			graphicsDevice.setFullScreenWindow(this);
			validate();
		}
		else
		{
			// If the full-screen exclusive mode is not supported, show a dialog box to prompt a message
			JOptionPane.showMessageDialog(null, "Full-Screen Exclusive Mode is not supported!");
		}
	}
}

[Fubarable]

I compiled your code, and on my computer (windows xp, java 1.6), full-screen mode appeared to work just fine with or without adding the JTextArea / JScrollPane. So I have no idea what is the cause of your problem. Could it be an OS or hardware dependent issue? Have you searched the Java bug database?

Much luck

[camickr]

and on my computer (windows xp, java 1.6),

I use the same configuration. (build 1.6.0_07-b06) and I also have problems. When I run the code with the following line comment out I get full screen mode:

// northPanel.add(scrollPane);

When the line is uncommented, I don't get full screen mode (nothing is displayed) and my computer freezes up.

I have this old code I found on the web lying around. I can display a text area using this code, however, the text area cannot accept input. Seems to me its like the problem of using a JWindow, that can't accept focus unless it was created specifying a parent JFrame.

I have no idea what the solution is, but here is the other code which seems to work a little better (for me anyway):

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class FullScreen01 extends JFrame
                                 implements ActionListener{

  private GraphicsDevice graphicsDevice;
  private DisplayMode origDisplayMode;
  private JButton exitButton = new JButton(
                                  "Exit Full-Screen Mode");

  public static void main(String[] args){
    //Get and display a list of graphics devices solely for
    // information purposes.
    GraphicsEnvironment graphicsEnvironment =
         GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] devices = 
                    graphicsEnvironment.getScreenDevices();
    for(int cnt = 0;cnt < 1;cnt++){
      System.out.println(devices[cnt]);
    }//end for loop

    //Construct a full-screen object using
    // graphicsDevice 0.
    new FullScreen01(devices[0]);
  }//end main

  //Constructor
  public FullScreen01(GraphicsDevice graphicsDevice){
    //Save a reference to the graphics device as an
    // instance variable so that it can be used later to
    // exit the full-screen mode.
    this.graphicsDevice = graphicsDevice;

    setTitle("This title will be hidden (undecorated)");

    //Get and save a reference to the original display
    // mode as an instance variable so that it can be
    // restored later.
    origDisplayMode = graphicsDevice.getDisplayMode();

    //Register an action listener on the exitButton.
    exitButton.addActionListener(this);

    //Place the exitButton in the JFrame
    getContentPane().add(exitButton, BorderLayout.NORTH);

    //Place four labels in the JFrame solely for the
    // purpose of showing that it is a full-screen
    // undecorated JFrame.
    JLabel eastLabel = new JLabel("     East     ");
    eastLabel.setOpaque(true);
    eastLabel.setBackground(Color.RED);
    getContentPane().add(eastLabel,BorderLayout.EAST);

    JLabel southLabel =
                 new JLabel("South",SwingConstants.CENTER);
    southLabel.setOpaque(true);
    southLabel.setBackground(Color.GREEN);
    getContentPane().add(southLabel,BorderLayout.SOUTH);

    JLabel westLabel = new JLabel("     West     ");
    westLabel.setOpaque(true);
    westLabel.setBackground(Color.RED);
    getContentPane().add(westLabel,BorderLayout.WEST);

//    JLabel centerLabel = new JLabel("Center",SwingConstants.CENTER);
//    centerLabel.setOpaque(true);
//    centerLabel.setBackground(Color.WHITE);
//    getContentPane().add(centerLabel,BorderLayout.CENTER);

	JTextArea textArea = new JTextArea(20, 30);
	textArea.setText("I'm a JTextArea");
	textArea.setLineWrap(true);
	textArea.setEditable(false);
	JScrollPane scrollPane = new JScrollPane(textArea);
    getContentPane().add(scrollPane,BorderLayout.CENTER);

    if (graphicsDevice.isFullScreenSupported()){
      // Enter full-screen mode witn an undecorated,
      // non-resizable JFrame object.
      setUndecorated(true);
      setResizable(false);
      //Make it happen!
      graphicsDevice.setFullScreenWindow(this);
      validate();
    }else{
      System.out.println("Full-screen mode not supported");
    }//end else

  }//end constructor

  //The following method is invoked when the used clicks
  // the exitButton
  public void actionPerformed(ActionEvent evt){
    //Restore the original display mode
    graphicsDevice.setDisplayMode(origDisplayMode);
    //Terminate the program
    System.exit(0);
  }//end actionPerformed
}//end classListing 26

[Willi]

People said the world is small, and I think that internet made it smaller :D. This program is one of more than 600 tutorials of Richard G Baldwin and @camickr : I read so many tutorials in this series but I don't even touch them to find a solution for this problem. Such a shame! :(. Thank you!

You can not enter text in the JTextArea because the setEditable() method has been disabled :

textArea.setEditable(false);

@Fubarable : where can I find the Java's bug database? Thank you!

Anyone who interested in the useful series of Richard G Baldwin can take a look at this : dickbaldwin.com (2 more posts to be able to post hyperlink :D)

[Willi]

In my program, I add some text inside the JTextArea and I got Full-Screen Exclusive Mode.

textArea.setText("haha");

For the first thought, I thought this was the solution. But then for sure in camickr example, I cleared the line :

textArea.setText(""I am a JTextArea!);

and the program still works!

Uncomprehensible! The solution is still in the dark =))

[Willi]

OK OK!

After studying the code above carefully, I found out the solution is to put all the components directly to the JFrame without putting it indirectly in a JPanel. =)))