Setting Background in java

[Macro 90G]

hi everyone!
i am using bluej and i want to set a photo as my background by using imagePanel, i think. However, i don't know how to do. can someone help me out giving some code for this as an example. thanks alot.

[BigDaddyLH]

hi everyone!
i am using bluej and i want to set a photo as my background by using imagePanel, i think. However, i don't know how to do. can someone help me out giving some code for this as an example. thanks alot.

I am not familiar with "imagePanel". What framework are you using?

[Macro 90G]

I am using 'JFrame' and i would like to know how to use ImagePanel, ImageFileManager, OFImage and ImageViewer to set photo as a background of a GUI.

[JosAH]

I am using 'JFrame' and i would like to know how to use ImagePanel, ImageFileManager, OFImage and ImageViewer to set photo as a background of a GUI.

I only know of JFrame being a class in the core set of Java SE classes; are all
the Image* classes your own or from a third part library? If so you need to consult
their API documentation for their use because they are not part of the Java SE
core library.

kind regards,

Jos

[BigDaddyLH]

I am using 'JFrame' and i would like to know how to use ImagePanel, ImageFileManager, OFImage and ImageViewer to set photo as a background of a GUI.

What framework is ImagePanel, ImageFileManager, OFImage and ImageViewer in?

[BigDaddyLH]

There are a number of ways to get a background image. My favourite way is a bit of a cheat, since I define a Border that draws the image. I like this approach since it doesn't involve subclassing any JComponent type.

import java.awt.*;
import java.awt.image.*;
import javax.swing.border.*;
 
public class CentredBackgroundBorder implements Border {
    private final BufferedImage image;
 
    public CentredBackgroundBorder(BufferedImage image) {
        this.image = image;
    }
 
    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        int x0 = x + (width-image.getWidth())/2;
        int y0 = y + (height-image.getHeight())/2;
        g. drawImage(image, x0, y0, null);
    }
 
    public Insets getBorderInsets(Component c) {
        return new Insets(0,0,0,0);
    }
 
    public boolean isBorderOpaque() {
        return true;
    }
}
 

import java.awt.*;
import java.io.*;
import java.net.URL;
import javax.imageio.*;
import javax.swing.*;
import javax.swing.border.*;
 
public class BackgroundBorderExample {
    public static void main(String[] args) throws IOException {
        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame f = new JFrame("BackgroundBorderExample");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JTextArea area = new JTextArea(24,80);
        area.setForeground(Color.WHITE);
        area.setOpaque(false);
        area.read(new FileReader(new File("BackgroundBorderExample.java")), null);
        final JScrollPane sp = new JScrollPane(area);
        sp.setBackground(Color.BLACK);
        sp.getViewport().setOpaque(false);
        f.getContentPane().add(sp);
        f.setSize(600,400);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
 
        String url = "http://blogs.sun.com/jag/resource/JagHeadshot.jpg";
        final Border bkgrnd = new CentredBackgroundBorder(ImageIO.read(new URL(url)));
        Runnable r = new Runnable() {
            public void run() {
                sp.setViewportBorder(bkgrnd);
                sp.repaint();
            }
        };
        SwingUtilities.invokeLater(r);
    }
}
 

In the above example (where orange really isn't my best colour) I used the JScrollPane method setViewportBorder. For other containers, you typically use setBorder.