Screenshot Processing

Question

          saveButton.addActionListener
               new ActionListener()
                    public void actionPerformed(ActionEvent event)
                         sig1.setVisible(true);
                         sig2.setVisible(true);
                         sig3.setVisible(true);
                         saveButton.setVisible(false);
                         try
                              Toolkit toolkit = Toolkit.getDefaultToolkit();
                              Dimension screenSize = toolkit.getScreenSize();
                              Rectangle screenRect = new Rectangle(screenSize);
                              Robot robot = new Robot();
                              BufferedImage image = robot.createScreenCapture(screenRect);
                              JFileChooser jFileChooser = new JFileChooser();
                              int returnVal = jFileChooser.showSaveDialog(saveButton);
                              if(returnVal == JFileChooser.APPROVE_OPTION)
                                   ImageIO.write(image, "jpg", new File(jFileChooser.getSelectedFile()+".jpg"));
                         catch(Exception e)
                              System.out.println(e);
                         sig1.setVisible(false);
                         sig2.setVisible(false);     
                         sig3.setVisible(false);
                         saveButton.setVisible(true);
          );I'm using the above code to capture and save a screenshot. However, I have two "problems." First, the screenshot saved is not showing sig1, sig2, or sig3 and is still showing saveButton. When my filechooser pops up, the screen looks the way I want it (showing the sigs and not the button), but the screenshot is showing the "old" screen. Secondly, my screenshot is getting my entire desktop, and I would like it to only get the currently open Java window. Can anyone provide some suggestions? Thanks a lot!

Answer 1

This is my standard response to a question like
this:
If you need further help then you need to create a
[url
http://homepage1.nifty.com/algafield/sscce.html]Short,
Self Contained, Compilable and Executable, Example
Program (SSCCE) that demonstrates the incorrectbehaviour, because I can't guess exactly what you are
doing based on the information provided.
And don't forget to use the [url
http://forum.java.sun.com/help.jspa?sec=formatting]Cod
e Formatting Tags so the code retains its
original formatting.
Because I guess I don't understand your problem. I
just reran my ScreenImage class. I changed the code
so that when you click on the "Create Images" button
I do the following:
a) set the button invisible
b) start a new Thread
c) in the Thread I sleep for 50ms
d) create an image of the frame
The resulting image does not contain the button. I
though you where trying to remove some components
from the frame before taking an image of the frame.
I believe I've done those 4 steps in my code. Here is the current code I'm using, with comments where I believe I am doing a, b, c, and d:
          saveButton.addActionListener
               new ActionListener()
                    public void actionPerformed(ActionEvent event)
                         sig1.setVisible(true); // a) setting fields visible and button invisible
                         sig2.setVisible(true);
                         sig3.setVisible(true);
                         saveButton.setVisible(false);
                         location = getLocationOnScreen();
                         dimension = getSize();
                         EvalRunnable evalRunnable = new EvalRunnable();
                         Thread t = new Thread(evalRunnable);
                         SwingUtilities.invokeLater(evalRunnable); // b) starting new thread (class EvalRunnable below)
                         sig1.setVisible(false);
                         sig2.setVisible(false);     
                         sig3.setVisible(false);
                         saveButton.setVisible(true);
public class EvalRunnable implements Runnable
     public void run()
          try
                        Thread.sleep(50); // c) putting thread to sleep for 50ms
               Rectangle screen = new Rectangle(ViewEval.location, ViewEval.dimension);
               Robot robot = new Robot();
               BufferedImage image = robot.createScreenCapture(screen); // d) creating image of the frame
               JFileChooser jFileChooser = new JFileChooser();
               int returnVal = jFileChooser.showSaveDialog(ViewEval.saveButton);
               if(returnVal == JFileChooser.APPROVE_OPTION)
                    ImageIO.write(image, "jpg", new File(jFileChooser.getSelectedFile()+".jpg"));
          catch(Exception e)
               System.out.println(e);
}So I think I did those 4 steps you recommend. Did I do anything wrong? Thanks a lot for the help camickr and others.