paint with JScrollBar

[shakeel]

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:

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);

            }
        });
    }

[DarrylBurke]

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

db

[DarrylBurke]

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

[shakeel]

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?

[Fubarable]

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.

[shakeel]

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