I'm trying to load a background image with a JFileChooser, but when the operation ends, the paintcomponent() method is not called as expected.
[EDIT] for this reason, instead of having a red ball over the background image, I have the red ball only.
I read in several other topics that the instance of my Mappa Object should be added to the frame:
Why is paint()/paintComponent() never called?
paintComponent not being called at the right time
PaintComponent is not being called
But this does not solve my problem: I created a JScrollPane that gets my component in the constructor and linked the JScrollPane and added it in the main frame with
frmEditor.getContentPane().add(scrollabile, BorderLayout.CENTER);
This is the code of the main Gui
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
import javax.swing.UIManager;
public class Gui implements ActionListener {
private JFrame frmEditor;
Mappa content;
private JMenuItem mntmSfondo;
private JScrollPane scrollabile;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Gui window = new Gui();
window.frmEditor.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Gui() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frmEditor = new JFrame();
frmEditor.setFont(UIManager.getFont("TextArea.font"));
frmEditor.setBounds(50, 50, 1024, 768);
frmEditor.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmEditor.getContentPane().setLayout(new BorderLayout(0, 0));
JPanel panelTile = new JPanel();
panelTile.setLayout(new BorderLayout(0, 0));
JPanel panelStrum = new JPanel();
panelStrum.setLayout(new GridLayout(15, 2));
content = new Mappa(null);
content.setMinimumSize(new Dimension(150, 150));
scrollabile = new JScrollPane(content);
scrollabile
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollabile
.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
frmEditor.getContentPane().add(scrollabile, BorderLayout.CENTER);
inizializzaMenu();
}
/**
* Initialize the menu.
*/
private void inizializzaMenu() {
JMenuBar menuBar = new JMenuBar();
frmEditor.setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
mnFile.setFont(UIManager.getFont("TextArea.font"));
JMenu mnAltro = new JMenu("Modify");
mnAltro.setFont(UIManager.getFont("TextArea.font"));
menuBar.add(mnAltro);
mntmSfondo = new JMenuItem("Load Background");
mntmSfondo
.setIcon(new ImageIcon(
Gui.class
.getResource("/com/sun/java/swing/plaf/windows/icons/TreeOpen.gif")));
mntmSfondo.setFont(UIManager.getFont("TextArea.font"));
mntmSfondo.addActionListener(this);
mnAltro.add(mntmSfondo);
}
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source == mntmSfondo) {
JFileChooser fc = new JFileChooser("tuttiSfondi");
int result = fc.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
File file = fc.getSelectedFile();
try {
content = new Mappa(file);
} catch (Exception ex) {
}
}
if (result == JFileChooser.CANCEL_OPTION) {
}
}
}
}
while this is the code of the class Mappa, that I would like to use to load the background from the JFileChooser.
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class Mappa extends JPanel {
Image immagine;
public Mappa(File fileImmagine) {
if (fileImmagine != null ) {
BufferedImage img = null;
try {
img = ImageIO.read(new File(fileImmagine.getPath()));
} catch (IOException e) {
e.printStackTrace();
}
this.immagine = img;
}
repaint();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.clearRect(0, 0, 4000, 4000);
g.drawImage(immagine, 0, 0, null);
g.setColor(Color.red);
g.fillOval(170, 170, 150, 150);
System.out.println("Called Repaint() on Mappa");
}
}
The problem is not in an incorrect image path, since it loads if I set the path on the Mappa class "manually", by giving the path instead of using new File(fileImmagine.getPath()) in the ImageIO.read, but that paintComponent is called only once, when the constructor of Mappa is called from the Gui class
When you set the background, you only allocate the new Mappa instance, but not actually adding it to any container. Try adding the following:
scrollabile.setViewportView(content);
Or instead, replace an image in the Mappa class. Ie:
public void setImage(File file) throws IOException {
this.immagine = ImageIO.read(file);
repaint();
}
Also, in paintComponent(), you could use panel dimensions to fill the whole area:
g.drawImage(immagine, 0, 0, getWidth(), getHeight(), this);
And don't forget to use a valid ImageObserver as JPanel implements one.
You aren't actually modifying the Mapa instance that you've added to the frame. The line
content = new Mappa(file);
in actionPerformed() doesn't change the panel in the frame, it reassigns the local variable only. You should instead put a method such as updateImage() in Mapa that will update the image that Mapa displays. You will also need to call repaint() after this so that it redraws the new image.
Related
Hello I am new to Java GUI I made a second.java which is as below:
package theproject;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class second extends JPanel implements ActionListener {
private Timer animator;
private ImageIcon imageArray[];
private int delay=50, totalFrames=8, currentFreames=1;
public second()
{
imageArray= new ImageIcon[totalFrames];
System.out.println(imageArray.length);
for(int i=0; i<imageArray.length;i++)
{
imageArray[i]=new ImageIcon(i+1+".png");
System.out.println(i+1);
}
animator= new Timer(delay, this);
animator.start();
}
public void paintComponent(Graphics g )
{
super.paintComponent(g);
if(currentFreames<8)
{
imageArray[currentFreames].paintIcon(this, g, 0, 0);
currentFreames++;
System.out.println(currentFreames);
}
else{
currentFreames=0;
}
}
#Override
public void actionPerformed(ActionEvent arg0) {
repaint();
}
}
And a Gui calling the constructor second and output is not showing . Can you please guide me what should I do and the gui is given below:
package theproject;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.SwingConstants;
import javax.swing.JTextField;
public class Sav {
private JFrame frame;
private JTextField textField;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Sav window = new Sav();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Sav() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
textField = new JTextField();
textField.setBounds(10, 0, 261, 20);
frame.getContentPane().add(textField);
textField.setColumns(10);
JButton btnNewButton = new JButton("Submit");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
second s= new second();
frame.add(s);
}
});
btnNewButton.setBounds(273, -1, 89, 23);
frame.getContentPane().add(btnNewButton);
}
}
The gui has to basically call the constructor and which will showcase the animation on the screen If someone what i am doing wrong or if something that has to be done please let me know .
First, don't update the state within the paintComponent method, paint can occur for a number of reasons at any time, mostly without your interaction. Painting should simple paint the current state. In your ActionListener, you should advance the frame and make decisions about what should occur (like resetting the frame value)
Second, you never actually add second to anything, so it will never be displayed.
Third, you don't override getPreferredSize in second, so the layout managers will have no idea what size the component should be and will simply be assigned 0x0, making it as good as invisible as makes no difference
Fourth, you're using null layouts. This is going to make you life impossibly hard. Swing has been designed and optimised around the use of layout managers, they do important work in deciding how best to deal with differences in font metrics across different rendering systems/pipelines, I highly recommend that you take the time to learn how to use them
Fifthly, paintComponent has no business been public, no one should ever call it directly
Example
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
public class Sav {
private JFrame frame;
private JTextField textField;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Sav window = new Sav();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Sav() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
textField = new JTextField(20);
frame.getContentPane().add(textField, gbc);
JButton btnNewButton = new JButton("Submit");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
second s = new second();
frame.add(s, gbc);
frame.getContentPane().revalidate();
frame.pack();
frame.setLocationRelativeTo(null);
}
});
frame.getContentPane().add(btnNewButton, gbc);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public class second extends JPanel implements ActionListener {
private Timer animator;
private ImageIcon imageArray[];
private int delay = 50, totalFrames = 8, currentFreames = 1;
public second() {
imageArray = new ImageIcon[totalFrames];
for (int i = 0; i < imageArray.length; i++) {
imageArray[i] = new ImageIcon(getImage(i));
}
animator = new Timer(delay, this);
animator.start();
}
protected Image getImage(int index) {
BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontMetrics fm = g2d.getFontMetrics();
g2d.dispose();
String text = Integer.toString(index);
int height = fm.getHeight();
int width = fm.stringWidth(text);
img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
g2d = img.createGraphics();
g2d.setColor(getForeground());
g2d.drawString(text, 0, fm.getAscent());
g2d.dispose();
return img;
}
#Override
public Dimension getPreferredSize() {
return new Dimension(imageArray[0].getIconWidth(), imageArray[1].getIconHeight());
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
imageArray[currentFreames].paintIcon(this, g, 0, 0);
}
#Override
public void actionPerformed(ActionEvent arg0) {
currentFreames++;
if (currentFreames >= imageArray.length) {
currentFreames = 0;
}
repaint();
}
}
}
Your code is also not working. It increment the values of image set but do not displays the images
Works just fine for me...
imageArray[i]=new ImageIcon(i+1+".png"); will not generate any errors if the image can't be loaded for some reason (and it will load the images in the background thread, which is just another issue).
Instead, I would recommend using ImageIO.read instead, which will throw a IOException if the image can't be read for some reason, which is infinitely more useful. See Reading/Loading an Image for more details
I've been hunting through past StackOverflow posts and trying to figure out why my image won't display.
I know that the ImageIO is fine since I can run getWidth() on my BufferedImage and it returns the correct width.
Here is my Graphic class, followed by my main class.
(I'm sorry for trashy code, I'm new to this.)
Code in Graphic class:
package blackjack;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Graphic extends JPanel implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
public JFrame frame = new JFrame("Game Window");
public JPanel layout = new JPanel(new BorderLayout());
public JPanel menu = new JPanel();
public JPanel playing = new JPanel(new BorderLayout());
public JPanel game = new JPanel();
public BufferedImage cardArray[] = new BufferedImage[52];
public void begin() {
//starting menu
}
public void playersTurn() {
menu.add(playing);
Font font = new Font("",Font.PLAIN, 24);
JPanel btnHolder = new JPanel();
JLabel play = new JLabel("Playing:");
JLabel or = new JLabel(" or ");
JLabel question = new JLabel(" ? ");
question.setFont(font);
or.setFont(font);
play.setFont(font);
JButton hit = new JButton("Hit");
JButton stand = new JButton("Stand");
hit.addActionListener(this);
stand.addActionListener(this);
playing.add(play, BorderLayout.WEST);
playing.add(btnHolder, BorderLayout.CENTER);
btnHolder.add(hit);
btnHolder.add(or);
btnHolder.add(stand);
btnHolder.add(question);
}
public void gui() {
//main gui
Dimension imageD = new Dimension(71,96);
Dimension menuD = new Dimension(900,120);
menu.setBorder(BorderFactory.createLineBorder(Color.black));
menu.setPreferredSize(menuD);
JPanel titlePanel = new JPanel();
JLabel title = new JLabel("BlackJack");
title.setFont(new Font("", Font.PLAIN, 14));
titlePanel.add(title);
Graphic gr = new Graphic();
gr.setPreferredSize(imageD);
//adding
frame.add(layout);
layout.add(menu, BorderLayout.SOUTH);
layout.add(titlePanel, BorderLayout.NORTH);
layout.add(gr, BorderLayout.CENTER);
//frame settings
frame.setSize(900, 650);
frame.setResizable(false);
frame.setVisible(true);
}
public void buildPathArray() {
for(int i = 1; i<=52; i++){
BufferedImage im = null;
try {
im = ImageIO.read(new File(Blackjack.getInstallDir() + Blackjack.s + "src" + Blackjack.s + "cardpngs"+ Blackjack.s + (100+i)+".png"));
} catch (IOException e) {
e.printStackTrace();
}
cardArray[i-1]= im;
//System.out.println(Blackjack.getInstallDir() + "\\src\\cardpngs\\" + (100+i)+".png");
}
}
#Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("Hit")) {
} else if(e.getActionCommand().equals("Stand")) {
}
}
#Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
//g.setColor(Color.GREEN);
//g.fillOval(20, 20, 20, 20);
g.drawImage(cardArray[0], 0, 0, this);
}
}
Code in my main class:
package blackjack;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Blackjack {
public static String installDir = "";
public static String s = "";
public static void main(String[] args) {
Path currentRelativePath = Paths.get("");
installDir = currentRelativePath.toAbsolutePath().toString();
s = System.getProperty("file.separator");
Graphic gr = new Graphic();
gr.buildPathArray();
gr.gui();
//System.out.println(installDir);
//g.playersTurn();
}
public static String getInstallDir() {
return installDir;
}
}
The output is this:
You're creating one instance of Graphic in your Blackjack class...
public class Blackjack {
public static String installDir = "";
public static String s = "";
public static void main(String[] args) {
//...
Graphic gr = new Graphic();
gr.buildPathArray();
gr.gui();
}
And another in your Graphic class
public void gui() {
//...
Graphic gr = new Graphic();
gr.setPreferredSize(imageD);
//adding
//...
layout.add(gr, BorderLayout.CENTER);
//...
}
But you only initialise the images, using buildPathArray of the instance in you BlackBelt class, which is not what is actually displayed on the screen...
As a general rule of thumb, you shouldn't be creating an instance of JFrame from within another component with the express purpose of display that component. Your Graphic component is also trying to do too much. Instead, I would have a Game class, maybe, which pulled the title, menu and Graphic components together and then put that onto an instance of JFrame
The main reason for this is, is your Graphic class is trying to do too much. It should be solely responsible for display the cards and managing them. The Game class should manage the other UI elements and be responsible for ensuring that the UI meets the current state of the game "model", taking in user input (and listening to events from the other UI elements) and updating the model and responding to events that the model creates, a little more like...
BlackJack...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class BlackJack {
public static void main(String[] args) {
new BlackJack();
}
public BlackJack() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Game());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class Game extends JPanel {
private JPanel menu;
private Graphic graphic;
public Game() {
menu = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(900, 120);
}
};
menu.setBorder(BorderFactory.createLineBorder(Color.black));
JPanel titlePanel = new JPanel();
JLabel title = new JLabel("BlackJack");
title.setFont(new Font("", Font.PLAIN, 14));
titlePanel.add(title);
Graphic gr = new Graphic();
gr.buildPathArray();
setLayout(new BorderLayout());
add(menu, BorderLayout.SOUTH);
add(titlePanel, BorderLayout.NORTH);
add(gr, BorderLayout.CENTER);
}
}
}
Graphic...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Graphic extends JPanel {
private static final long serialVersionUID = 1L;
public BufferedImage cardArray[] = new BufferedImage[52];
public void begin() {
//starting menu
}
public void playersTurn() {
// All of this belongs in Game
}
#Override
public Dimension getPreferredSize() {
return new Dimension(71,96);
}
public void buildPathArray() {
for (int i = 1; i <= 52; i++) {
BufferedImage im = null;
try {
im = ImageIO.read(new File(Blackjack.getInstallDir() + Blackjack.s + "src" + Blackjack.s + "cardpngs" + Blackjack.s + (100 + i) + ".png"));
} catch (IOException e) {
e.printStackTrace();
}
cardArray[i - 1] = im;
//System.out.println(Blackjack.getInstallDir() + "\\src\\cardpngs\\" + (100+i)+".png");
}
}
#Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
//g.setColor(Color.GREEN);
//g.fillOval(20, 20, 20, 20);
g.drawImage(cardArray[0], 0, 0, this);
}
}
You might also want to have a look at Model-View-Controller.
This is for a class assignment. I am supposed to load a file and display it on my Swing application.
I followed the process from the notes but they were vague, I also used other stackoverflow posts, but I am not able to get this to work. When I load an image the program does not crash, but nothing displays.
-Do I have to repaint or refresh the file after the image is loaded? I tried that but it did not work. what am I doing wrong? The repaint method is commented.
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Part1 {
public static File selectedFile;
public static void main(String[] args) {
JFrame frame = buildFrame();
JButton button = new JButton("Select File");
frame.add(button);
button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
JFileChooser fileChooser = new JFileChooser();
int returnValue = fileChooser.showOpenDialog(null);
if (returnValue == JFileChooser.APPROVE_OPTION)
{
selectedFile = fileChooser.getSelectedFile();
CardImagePanel image = new CardImagePanel(selectedFile);
frame.add(image);
// frame.repaint();
}
}
});
}
private static JFrame buildFrame()
{
JFrame frame = new JFrame();
frame.setSize(1000,1000);
frame.setLayout(new FlowLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
return frame;
}
}
class CardImagePanel extends JPanel {
private BufferedImage image;
public CardImagePanel(File newImageFile)
{
try {
image = ImageIO.read(newImageFile);
} catch (IOException e){
e.printStackTrace();}
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, 500, 500, this);
}
}
As was mentioned, you need to call frame.revalidate(); after you add the new component.
You also should call image.setPreferredSize(new Dimension(500, 500)); or similar to ensure that your image isn't tiny.
I have a Graphics question. I'm trying to draw an image in a Frame and I'm having some issue. I want to know what's the best approach to successfully do what I want to do.
I will show my 3 classes. The Main class create the Menu. Once Matchmaking button is press, it create the Board object and call Main.draw to paint all it's component (only Board for now). The picture only sometime appear so it make me realise my code isn't probably setup the right way. THANKS!!!
MAIN CLASS
import java.awt.Graphics;
public class Main
{
public static Board theBoard;
public static void main(String[] args)
{
new Menu("Main Menu").setVisible(true);
}
public static void draw(Graphics painter)
{
theBoard.draw(painter);
}
}
MENU CLASS
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Menu extends JFrame implements ActionListener
{
//Jpanel
JPanel pnlButton = new JPanel();
//Buttons
JButton btnMatchmaking = new JButton("Matchmaking");
JButton btnExit = new JButton("Exit");
JButton btnProfile = new JButton("Profile");
JButton btnOption = new JButton("Options");
public Menu(String s)
{
super("Bu$ted: " + s);
btnExit.addActionListener(this);
btnMatchmaking.addActionListener(this);
//JPanel setting
pnlButton.add(btnMatchmaking);
pnlButton.add(btnProfile);
pnlButton.add(btnOption);
pnlButton.add(btnExit);
pnlButton.setVisible(true);
//The winddow options
super.setLocation(0,0); //A remplacer par des dimension variables
super.setSize(600, 500); //A remplacer par des dimension variables
super.setResizable(false);
super.setVisible(true);
super.add(pnlButton);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//Handle action events.
//#param evt
#Override
public void actionPerformed(ActionEvent evt)
{
if(evt.getSource() == btnMatchmaking)
{
super.remove(pnlButton);
Main.theBoard = new Board("TestBoard");
super.add(Main.theBoard);
super.setSize(Main.theBoard.boardSize);
Main.draw(super.getGraphics());
}
if(evt.getSource() == btnExit)
{
System.exit(0);
}
}
}
BOARD CLASS
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
public class Board extends JPanel
{
BufferedImage boardImage;
int width;
int height;
Dimension boardSize;
public Board (String boardName)
{
boardImage = loadBoard(boardName);
width=boardImage.getWidth();
height=boardImage.getHeight();
boardSize = new Dimension(width,height);
this.setVisible(true);
System.out.println("The board is setup.");
}
private BufferedImage loadBoard (String boardName)
{
BufferedImage img = null;
try
{
img = ImageIO.read(new File("Components/"+boardName+".png"));
}
catch (IOException e)
{
System.out.println("The board image couldn't be loaded.");
}
return img;
}
public void draw(Graphics painter)
{
painter.drawImage(boardImage, 0, 0, null);
System.out.println("The board image was painted.");
}
}
The recommended approach is to override the paintComponent of your Board class and let the paint system handel it...
See Painting in AWT and Swing and Perfoming Custom Painting for more details
I didn't know how, and there is no background image property. I researched the answer but all I could find was to set a labels icon inside a panel with a null layout. This worked and my image is there, but it is covering all but a single text field. Can I change the Z value of this label? I do not see a 'move to back' option, if there is one.
This should solve your problem:
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class TestImage {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
ContentPane panel = new ContentPane();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
});
}
private static class ContentPane extends JPanel {
BufferedImage image = null;
public ContentPane() {
try {
String pathToImage = "C:/Users/Branislav/Pictures/sun.jpg";
image = ImageIO.read(new File(pathToImage));
} catch (IOException e) {
e.printStackTrace();
}
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, null);
};
#Override
public Dimension getPreferredSize() {
return new Dimension(image.getWidth(), image.getHeight());
}
}
}
Basically, I set image on JPanel (ContentPane). Also, size of your JPanel depends on size of image (at least in this case).
Regards.