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JPanel and putting a Background GIF pic...NOT WORKING

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Join Date: Jan 2005

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kharri5

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JPanel and putting a Background GIF pic...NOT WORKING

Sep 9th, 2005

I'm new to swing, and was curious if anyone could point me in the right direction here. Cannot figure out how to make this repaint crap work, or if I'm supposed to be using repaint(), or what, to make this image get drawn to the background of my window. Here is my code that I have so far. It is drawing nothing at this point:

i

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 Java Syntax (Toggle Plain Text) 
mport java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/**
 *
 * @author  
 * @version September 8, 2005, 11:54 PM
 */
 
 class MyPanel extends JPanel 
 {
        String imageFilePath =   "C:/MyDocuments/MemoryGame/woodTable.gif";
        ImageIcon icon;
        Image img;
 
        public MyPanel() 
        {
            icon = new ImageIcon(imageFilePath);
            img = icon.getImage();
        }
 
        public void paint(Graphics g) 
        {
            super.paint(g);
            g.drawImage(img, 300, 200, this);
        }
}
mport java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/**
 *
 * @author  
 * @version September 8, 2005, 11:54 PM
 */

 class MyPanel extends JPanel 
 {
        String imageFilePath =   "C:/MyDocuments/MemoryGame/woodTable.gif";
        ImageIcon icon;
        Image img;

        public MyPanel() 
        {
            icon = new ImageIcon(imageFilePath);
            img = icon.getImage();
        }

        public void paint(Graphics g) 
        {
            super.paint(g);
            g.drawImage(img, 300, 200, this);
        }
}

And Then My JFrame class

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 Java Syntax (Toggle Plain Text) 
import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
/**
 *
 * @author  
 * @version September 8, 2005, 10:40 PM
 */
public class memGame extends JFrame
{
 
    /** Creates a new instance of memGame */
    public memGame() 
    {
        super("Mario Memory Game");
        Container win = getContentPane();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(640,480);
        MyPanel mp = new MyPanel();
        mp.repaint();
        win.add(mp);
 
        JMenuBar menuBar = new JMenuBar();
 
        JMenu gMenu = new JMenu("Game");
        JMenu gMenu2 = new JMenu("Extra");
 
        JMenuItem newG = new JMenuItem("New Game");
        JMenuItem quit = new JMenuItem("Quit Game");
        JMenuItem help = new JMenuItem("Help");
        JMenuItem about = new JMenuItem("About");
 
        gMenu.add(newG);
        gMenu.add(quit);
        gMenu2.add(help);
        gMenu2.add(about);
 
        menuBar.add(gMenu);
        menuBar.add(gMenu2);
        setJMenuBar(menuBar);
    }
 
    public void ActionPerformed(ActionEvent e)
    {
    }
 
}
import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/**
 *
 * @author  
 * @version September 8, 2005, 10:40 PM
 */
public class memGame extends JFrame
{
    
    /** Creates a new instance of memGame */
    public memGame() 
    {
        super("Mario Memory Game");
        Container win = getContentPane();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(640,480);
        MyPanel mp = new MyPanel();
        mp.repaint();
        win.add(mp);
        
        JMenuBar menuBar = new JMenuBar();
        
        JMenu gMenu = new JMenu("Game");
        JMenu gMenu2 = new JMenu("Extra");
        
        JMenuItem newG = new JMenuItem("New Game");
        JMenuItem quit = new JMenuItem("Quit Game");
        JMenuItem help = new JMenuItem("Help");
        JMenuItem about = new JMenuItem("About");
        
        gMenu.add(newG);
        gMenu.add(quit);
        gMenu2.add(help);
        gMenu2.add(about);
        
        menuBar.add(gMenu);
        menuBar.add(gMenu2);
        setJMenuBar(menuBar);
    }
    
    public void ActionPerformed(ActionEvent e)
    {
    }
        
}

An lastly i have my main method which just calls an instance of my JFrame class, and then setVisibile(true)

If Anyone could tell me why it wont write the image, and how to remedy it, I would much appreciate. Thanks

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 9th, 2005

It's probably not that the image isn't being drawn, it's that the image cannot be found.

Try this:
image = getImage(getDocumentBase(), "image.gif");

And make sure that the image is in the same file as the program.

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 10th, 2005

I may be wrong here but do you need to 'escape' the path deliminators, like this:

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String imageFilePath = "C:\\MyDocuments\\MemoryGame\\woodTable.gif";
String imageFilePath = "C:\\MyDocuments\\MemoryGame\\woodTable.gif";

The '\\' is not a typo. The first '\' escapes the second.

Kate

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 11th, 2005

Remove the call to super.paintComponent(whatever it was). I spent 2 weeks trying to fix this once and found out that for some reason, calling that made the background disappear.
Example: http://compuchat.freeownhost.com/sni...age_background

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NPH

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 12th, 2005

Your image is not being found. Probably the directory "C:/MyDocuments/MemoryGame/woodTable.gif"; doesn't exist.

If its in your documents folder then the correct directory would be:

C:/Documents and Settings/YOUR WINDOWS USER NAME HERE/My Documents/woodTable.gif.

For more help, www.NeedProgrammingHelp.com

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kharri5

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 14th, 2005

Okay, so long time not replying. Here's the deal.
One, I'm using Netbeans, and the image is being found, because netBeans raises bitchy errors if the image isn't found. So I don't believe it is that.

Two, that removal of the super.paint(g) call did nothing. It turned the screen white, instead of gray, which i suppose is something, but not what I need.

Three, the delimeters in netbeans do not need to be escaped. I've done files like this before and it's found them all. Something is wrong with my method, or with how I'm calling up the image once its been loaded. Somethign is missing. If someone has any more suggestions, I would like to know, because this looks logical to me.

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hooknc

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Re: JPanel and putting a Background GIF pic...NOT WORKING

Sep 14th, 2005

My guess is the panel you're adding to the Frame isn't taking up the entire frame or the image isn't being found. The folloing code works fine on my machine.

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public class ImageJPanel extends JPanel
{
	private Image aImage = null;
 
	public ImageJPanel()
	{
		init();
	}
 
	private void init()
	{
		File file = new File("D:\\Temp\\met_art_07_000891.jpg");
		System.out.println("file.exists(): " + file.exists());
		ImageIcon imageIcon = new ImageIcon(file.getAbsolutePath());
		aImage = imageIcon.getImage();
	}
 
	public void paint(Graphics g) 
    {
		super.paint(g);
        g.drawImage(aImage, 0, 0, this);
    }
}
public class ImageJPanel extends JPanel
{
	private Image aImage = null;
	
	public ImageJPanel()
	{
		init();
	}
	
	private void init()
	{
		File file = new File("D:\\Temp\\met_art_07_000891.jpg");
		System.out.println("file.exists(): " + file.exists());
		ImageIcon imageIcon = new ImageIcon(file.getAbsolutePath());
		aImage = imageIcon.getImage();
	}
	
	public void paint(Graphics g) 
    {
		super.paint(g);
        g.drawImage(aImage, 0, 0, this);
    }
}

Here is the frame using GridBagLayout.

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public class ExtendedJFrame extends JFrame
{
	public ExtendedJFrame()
	{
		init();
	}
 
	public ExtendedJFrame(String title)
	{
		super(title);
		init();
	}
 
	private void init()
	{
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
		setSize(640,480);
 
		GridBagLayout gbl = new GridBagLayout();
		getContentPane().setLayout(gbl);
 
		GridBagConstraints gbc = new GridBagConstraints();
 
		ImageJPanel panel = new ImageJPanel();
		gbc.gridx = 0;
		gbc.gridy = 0;
		gbc.weightx = 1;
		gbc.weighty = 1;
		gbc.fill = GridBagConstraints.BOTH;
		getContentPane().add(panel, gbc);
	}
}
public class ExtendedJFrame extends JFrame
{
	public ExtendedJFrame()
	{
		init();
	}
	
	public ExtendedJFrame(String title)
	{
		super(title);
		init();
	}
	
	private void init()
	{
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		setSize(640,480);
		
		GridBagLayout gbl = new GridBagLayout();
		getContentPane().setLayout(gbl);
		
		GridBagConstraints gbc = new GridBagConstraints();
		
		ImageJPanel panel = new ImageJPanel();
		gbc.gridx = 0;
		gbc.gridy = 0;
		gbc.weightx = 1;
		gbc.weighty = 1;
		gbc.fill = GridBagConstraints.BOTH;
		getContentPane().add(panel, gbc);
	}
}