paint with JScrollBar

Hi, Im new to this forum and i need to use a jscrollbar on an image painted in a frame using paint (Graphics g) method. Here is my code:

Code:

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public class Warping extends javax.swing.JFrame {
private BufferedImage image;

public Warping() {
        initComponents();
       

    }
private void initComponents() {
 setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("IMAGE WARPING");
        setBackground(new java.awt.Color(255, 255, 255));
        setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        menuLoad = new javax.swing.JMenuItem();
        menuExit = new javax.swing.JMenuItem();
        jMenu1.setText("File");

        menuLoad.setText("Load");
        menuLoad.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                menuLoadActionPerformed(evt);
            }
        });
        jMenu1.add(menuLoad);

        menuExit.setText("Exit");
        menuExit.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                menuExitActionPerformed(evt);
            }
        });
        jMenu1.add(menuExit);

        jMenuBar1.add(jMenu1);

private void menuExitActionPerformed(java.awt.event.ActionEvent evt) {                                       
      System.exit(0);
    }                                       

    private void menuLoadActionPerformed(java.awt.event.ActionEvent evt) {                                       
      openFile();
    }         
public void openFile()
    {

        JFileChooser chooser = new JFileChooser();
        chooser.setCurrentDirectory(new File("."));
        String[] extensions = ImageIO.getReaderFileSuffixes();
        chooser.setFileFilter(new FileNameExtensionFilter("Image files", extensions));
        int r = chooser.showOpenDialog(this);
        if (r != JFileChooser.APPROVE_OPTION) return;

        try
        {
           
            Image img = ImageIO.read(chooser.getSelectedFile());

            image = new BufferedImage(img.getWidth(null), img.getHeight(null),BufferedImage.TYPE_INT_RGB);

           
         
            image.getGraphics().drawImage(img, 0, 0,null);
         

            this.setBounds(0, 0, image.getWidth()+25, image.getHeight()+63);
   
            repaint();
        }
        catch (IOException e)
        {
            JOptionPane.showMessageDialog(this, e);
        }
        repaint();
    }

    private void filter(BufferedImageOp op)
    {
      if (image == null){
          return;
      }
      else{
          image = op.filter(image, null);
      repaint();
      }
     

    }
 public void paint(Graphics g)
              {
     
        super.paintComponents(g);
                if (image != null){
                    image.flush();
                    Dimension d = getSize();
                    g.drawImage(image, 0, 0,  this);
         
                   
                }
              }





    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Warping().setVisible(true);

            }
        });
    }

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Did you forget to ask a question, or did you just want to share your code?

db

But after a glance at the code, you most definitely need to go through Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing).

db

Oops my bad.. My question is that how to include a Jscrollbar so that when the image size is greater than the frame size, theJscrollbar allows me to scroll down for the remaining part of the picture?

Place the Image into an ImageIcon and the ImageIcon into a JLabel. Add the JLabel to the JScrollPane's viewport and it should add scrollbars automatically if the image is larger than the viewport.

I tried it and it works perfectly. Thanks a lot for your advice. :)