V2 - Problem with Image & Browse file.

[vu vinh]

Hi everyone !

My problem is : I've a "x.jpg". I want to zoom in,zoom out, rotate... it in may jLable(or another object) ( jLable is unresizeable and it lays at specification on my jFrame).
( I design my jFrame and jLable by netbean 4.1 )

What's actions I need ?

And, anybody here knows way to browse and access file in mobi ? please show me that way.

( Now I need more information about this problem, Please help me.)
Thanhs !

[Craig Wood]

There are a lot of ways to put these things together. You can use a JLabel with ImageIcon and reset the icon with a new BufferedImage in the same way shown here. You can find information about customizing the JFileChooser on the tutorial page How to Use File Choosers

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
 
public class ImageManipulation extends JPanel
{
    BufferedImage orig, image;
    double theta, thetaInc, scale, zoomInc;
    final int
        WIDTH  = 240,
        HEIGHT = 240;
 
    public ImageManipulation(BufferedImage image)
    {
        orig = image;
        theta = 0;
        thetaInc = Math.PI/6;  // 30 degrees
        scale = 1.0;
        zoomInc = 0.01;
        updateImage();
    }
 
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        int w = getWidth();
        int h = getHeight();
        int iw = image.getWidth();
        int ih = image.getHeight();
        int x = (w - iw)/2;
        int y = (h - ih)/2;
        g.drawImage(image, x, y, this);
    }
 
    private void updateImage()
    {
        int w = WIDTH, h = HEIGHT;
        image = new BufferedImage(w, h, orig.getType());
        Graphics2D g2 = image.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                            RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        g2.setPaint(getBackground());
        g2.fillRect(0,0,w,h);
        int iw = orig.getWidth();
        int ih = orig.getHeight();
        double x = (w/scale - iw)/2;
        double y = (h/scale - ih)/2;
        AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
        at.translate(x, y);
        at.rotate(theta, iw/2, ih/2);
        g2.drawRenderedImage(orig, at);
        g2.dispose();
    }
 
    public void zoom(int direction)
    {
        scale += zoomInc * direction;
        updateImage();
        repaint();
    }
 
    public void rotate()
    {
        theta += thetaInc;
        updateImage();
        repaint();
    }
 
    public void setImage(BufferedImage image)
    {
        orig = image;
        updateImage();
        repaint();
    }
 
    public Dimension getPreferredSize()
    {
        return new Dimension(WIDTH, HEIGHT);
    }
 
    public static void main(String[] args) throws IOException
    {
        String path = "images/cougar.jpg";
        BufferedImage bi = ImageIO.read(ImageManipulation.class.getResource(path));
        ImageManipulation im = new ImageManipulation(bi);
        ImageWrangler wrangler = new ImageWrangler(im);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(im);
        f.getContentPane().add(wrangler.getUIPanel(), "South");
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}
 
class ImageWrangler implements ActionListener
{
    ImageManipulation imageManipulation;
    JFileChooser fileChooser;
 
    public ImageWrangler(ImageManipulation im)
    {
        imageManipulation = im;
        fileChooser = new JFileChooser(".");
    }
 
    public void actionPerformed(ActionEvent e)
    {
        JButton button = (JButton)e.getSource();
        String ac = button.getActionCommand();
        if(ac.equals("ZOOM_IN"))
            imageManipulation.zoom(1);
        if(ac.equals("ZOOM_OUT"))
            imageManipulation.zoom(-1);
        if(ac.equals("ROTATE"))
            imageManipulation.rotate();
        if(ac.equals("OPEN"))
            showDialog();
    }
 
    private void showDialog()
    {
        int retVal = fileChooser.showOpenDialog(imageManipulation);
        if(retVal == JFileChooser.APPROVE_OPTION)
        {
            File file = fileChooser.getSelectedFile();
            BufferedImage bi = null;
            try
            {
                bi = ImageIO.read(file);
            }
            catch(IOException ioe)
            {
                System.err.println("wrangler read error: " + ioe.getMessage());
                bi = imageManipulation.image;
            }
            imageManipulation.setImage(bi);
        }
    }
 
    public JPanel getUIPanel()
    {
        JButton
            zoomIn  = getButton("zoom in",  "ZOOM_IN"),
            zoomOut = getButton("zoom out", "ZOOM_OUT"),
            rotate  = getButton("rotate",   "ROTATE"),
            load    = getButton("open",     "OPEN");
        JPanel panel = new JPanel(new GridLayout(1,0));
        panel.add(zoomIn);
        panel.add(zoomOut);
        panel.add(rotate);
        panel.add(load);
        return panel;
    }
 
    private JButton getButton(String id, String ac)
    {
        JButton button = new JButton(id);
        button.setActionCommand(ac);
        button.addActionListener(this);
        return button;
    }
}

[vu vinh]

Thanks you for showing me the way to manipulate with Images !

And my second problem is " Browse files in mobilePhone "
as I know JChooser Object only can browses files in my PC. ( I've read a lot document about JChooser but I've not found any method to browse file in mobilePhone ).

Can you help me again ?

Thanks