CaptureArea.java

/**
     * Captures the currently selected area of the screen and sends it to the 
     * System Clipboard as an image.
     * 
     * Sets the capture button non-visible so it is not captured in the screenshot.
     */
    private void captureArea()
    {
        btnCapture.setVisible(false);
        this.repaint();

        //We run the screen capture in a different thread so that we can wait while
        //the button is becoming invisible. (We don't want the button in the image).
        new Thread(new Runnable() 
        {
            @Override
            public void run()
            {
                Robot r;
                Point loc = pnlCapture.getLocationOnScreen();
                Rectangle imageArea = new Rectangle(
                        loc.x, loc.y, pnlCapture.getWidth(), pnlCapture.getHeight());
                try
                {
                    Thread.sleep(20);
                    r = new Robot();            
                    BufferedImage i = r.createScreenCapture(imageArea);
                    UploaderFrame.CLIPBOARD.setContents(new ClipboardImage(i), null);
                }
                catch (InterruptedException e)
                {
                    e.printStackTrace();   
                }
                catch (AWTException e)
                {
                    e.printStackTrace();
                }
                btnCapture.setVisible(true);
            }
        }).start();        
    }