background image for JPanel

Ive tried many of the things that search suggested but none of them pertained enough to what i am doing for it to work. Here is my code:package gameFunctions;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

public class loginScreen extends JFrame implements ActionListener

{

JTextField USERNAME, Username, PASSWORD, Password; // yeah i know, bad practice but there is some logic to the names relative to capitalization

String username, password;

JButton LOGIN;

Dimension res = Toolkit.getDefaultToolkit().getScreenSize();

ImageIcon background = new ImageIcon("C:\\FileTesting\\testImage.jpg");;

JPanel pane;

public static void main(String[] args)

{

loginScreen frame = new loginScreen();

frame.setVisible(true);

}

public loginScreen()

{

Container c = getContentPane();

setSize(400, 300);

setLocation((int)res.getWidth()/2-getWidth()/2, (int)res.getHeight()/2-getHeight()/2);

setResizable(false);

setLayout(null);

pane = new JPanel();

pane.setSize(getWidth(), getHeight());

pane.setLayout(null);

c.add(pane);

USERNAME = new JTextField("Username:");

USERNAME.setSize(68,25);

USERNAME.setLocation(getWidth()/2-USERNAME.getWidth()/2-80, getHeight()/2-USERNAME.getHeight()/2-50);

USERNAME.setEditable(false);

pane.add(USERNAME);

PASSWORD = new JTextField("Password:");

PASSWORD.setSize(68,25);

PASSWORD.setLocation(USERNAME.getX(), USERNAME.getY()+30);

PASSWORD.setEditable(false);

pane.add(PASSWORD);

Username = new JTextField();

Username.setSize(150,25);

Username.setLocation(USERNAME.getX()+USERNAME.getWidth()+5, USERNAME.getY());

Username.setEditable(true);

pane.add(Username);

Password = new JTextField();

Password.setSize(150,25);

Password.setLocation(Username.getX(), Username.getY()+30);

Password.setEditable(false); // because im not working with PW's yet

pane.add(Password);

LOGIN = new JButton("LOGIN");

LOGIN.setSize(80,30);

LOGIN.setLocation(getWidth()/2-LOGIN.getWidth()/2, PASSWORD.getY()+30);

pane.add(LOGIN);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent event)

{

}

}

i want "pane" to be the image of "background" imageIcon is the only thing that works like this because i dont know how to use straight up "Image". everything works if i set the ImageIcon "background" to be the background of JButton "LOGIN"

any help would be greatly appreciated

HDL_CinC_Dragona at 2007-7-14 20:59:40 >

forgive my noobishness but it doesnt display any image... would you mind telling me what i need to change in order to have an image from the HDD be displayed in the JPanel?

i think all i have to do is change this line right?: img = javax.imageio.ImageIO.read(new java.net.URL(getClass().getResource(file), file));

and maybe this one too:ImagePanel panel = new ImagePanel("test.gif");

but i dont know what exactly i need to change it to...

please help me

HDL_CinC_Dragona at 2007-7-14 20:59:40 >

1)

copy this file into the same directory as the .java file you made from my prior post

testImage.jpg

2)

change

ImagePanel panel = new ImagePanel("test.gif");

to

ImagePanel panel = new ImagePanel("testImage.jpg");

3)

recompile/rerun, your image should appear as a background, with a JButton

near the top center

Michael_Dunna at 2007-7-14 20:59:40 >

Thanks! it works great! I thank you greatly for your help and patience...

one more question:

Ive done a forum search on this but nothing releated came up...

is it possible to set a background image to JTextArea similar to the "setIcon" method for JButtons? This will be my last question on the matter I promise.

HDL_CinC_Dragona at 2007-7-14 20:59:40 >

> is it possible to set a background image to JTextArea

I don't know that it's a good idea mixing the graphics 'with' the text, seems

easier to have the panel showing an image, then adding a transparent text area

to the panel, effectively typing over the top of the image - if that is what you are trying to do.

here's the earlier code modified

import java.awt.*;

import javax.swing.*;

class loginScreen extends JFrame

{

public loginScreen()

{

setDefaultCloseOperation(EXIT_ON_CLOSE);

ImagePanel panel = new ImagePanel("file:c:\\FileTesting\\test.gif");

panel.setLayout(new GridLayout(1,1));

JTextArea ta = new JTextArea();

JScrollPane sp = new JScrollPane(ta);

ta.setOpaque(false);

sp.setOpaque(false);

sp.getViewport().setOpaque(false);

panel.add(sp);

getContentPane().add(panel);

pack();

setLocationRelativeTo(null);

}

class ImagePanel extends JPanel

{

Image img;

public ImagePanel(String file)

{

setPreferredSize(new Dimension(100, 100));

try

{

img = javax.imageio.ImageIO.read(new java.net.URL(getClass().getResource(file), file));

}

catch(Exception e){}//do nothing

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

if(img != null) g.drawImage(img,0,0,getWidth(),getHeight(),this);

}

}

public static void main(String[] args){new loginScreen().setVisible(true);}

}

Michael_Dunna at 2007-7-14 20:59:40 >

This posting has a link to my ImagePanel, which allows you to do different things with the background image (tiling, scaling...). It automatically makes the components non-opaque as well so you don't have to worry about it.

http://forum.java.sun.com/thread.jspa?forumID=57&threadID=316074

camickra at 2007-7-14 20:59:40 >