I'm trying to create an 8x8 grid composed of pre made images to be used for a board game, however I am having difficulty loading the images.
Dimension Size = new Dimension(400, 400);
layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(Size);
getContentPane().add(layeredPane);
board.setLayout(new GridLayout(8,8));
board.setPreferredSize(Size);
board.setBounds(0, 0, Size.width, Size.height);
layeredPane.add(board, JLayeredPane.DEFAULT_LAYER);
// Load squares to board
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
JPanel square = new JPanel( new BorderLayout() );
square. // Load .jpg here?????
board.add( square );
}
}
The only method I know is ImageIcon, but that doesn't seem to work... So I'm stuck.
Any help would be appreciated, Thanks.
ImageIcon should work fine. See the Swing tutorial on How to Use Icons for more information and examples.
Try this code snippet, adapted from java2s.com:
class ImagePanel extends JPanel {
private Image img;
public ImagePanel(URL imgURL) {
this(new ImageIcon(imgURL).getImage());
}
public ImagePanel(Image img) {
this.img = img;
Dimension size = new Dimension(img.getWidth(this), img.getHeight(this));
setPreferredSize(size);
setMinimumSize(size);
setMaximumSize(size);
setSize(size);
setLayout(null);
}
#Override
public void paintComponent(Graphics g) {
super.paint(g);
g.drawImage(img, 0, 0, this);
}
}
You can add those ImagePanels inside the JPanel
Related
I'm making a board game in Java, and I am trying to render the board itself in JPanel. The way I'm trying to do this is by inserting a image of the board (which is represented by a JLabel) and a grid (which is also represented by a JPanel). The idea is for each grid square to correspond to the squares on the image of the board.
Here is what it currently looks like
As you can see, it's not aligning correctly. Here is the code I tried to accomplish this:
public class BoardImage {
ImagePanel test = new ImagePanel();
GridPanel grid = new GridPanel();
public void returnBoardPanel() {
JFrame frame = new JFrame("JPanel Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel image = new JLabel();
image = test.createImage();
image.setLayout(new BorderLayout());
frame.setContentPane(image);
frame.add(grid.paintMe());
frame.pack();
frame.setResizable(false);
frame.setVisible(true);
}
public static void main (String[] agrs) {
BoardImage test = new BoardImage();
test.returnBoardPanel();
}
}
class ImagePanel extends JPanel{
public JLabel createImage() {
JLabel temp = new JLabel();
ImageIcon icon = new ImageIcon(this.getImage("/boardEdit.jpeg"));
temp.setIcon(icon);
temp.setBounds(0, 0, 552, 575); //needed in order for 24x25 to work
return temp;
}
public Image getImage(String filePath) {
int width, height;
Image tempImage = null;
try {
/* Loads the image, and assigns it to the tempImage var */
URL imagePath = BoardImage.class.getResource(filePath);
tempImage = Toolkit.getDefaultToolkit().getImage(imagePath);
}
catch(Exception e){ //if the filePath does not exist, or something else messed up
System.err.println("We were not able to load the requested image form the given filePath: " + "\n" + filePath);
}
return tempImage;
}
}
class GridPanel extends JPanel{
private JLabel[][] grid;
public GridPanel paintMe(){
this.setBounds(0, 0, 552, 575); //needed in order for 24x25 to work
this.fillGrid();
this.setOpaque(false);
return this;
}
public void fillGrid() {
this.setLayout(new GridLayout(24, 25));
grid = new JLabel[24][25];
for (int i = 0; i < 24; i++) {
for (int j = 0; j < 25; j++) {
grid[i][j] = new JLabel();
grid[i][j].setBorder(new LineBorder(Color.BLACK));//keep this until it works
grid[i][j].setOpaque(false);
this.add(grid[i][j]);
}
}
}
}
I've tried everything I've found online, and on SO, but I can't seem to figure it out. Any suggestions?
New to Java and very new to Java's GUI classes. I'm making a GUI to showcase a few games, but am having difficulties switching panels. I read about CardLayout but I'm having an issue implementing it because I can't get the JPanels that hold the different games' GUIs to send their events back to the class that uses the CardLayout. (This is probably where I'm going wrong -- I can't get my head around how to structure this properly.)
This is my main menu (called mainContainer):
This is the overall structure of the GUI driver:
public class CasinoDriverGUI {
//CardLayout is here in the main method Container contentPane.add(cardLayout)
public static void main(String[] args) throws IOException
//MainContainer is MenuScreen: GridBagLayout for nice button placement
static class MainContainer extends JPanel implements ActionListener{...}
static class CrapsContainer extends JPanel implements ActionListener{...}
static class PokerContainer extends JPanel implements ActionListener{...}
//Button with custom look
class CButton extends JButton
}//end CasinoDriverGUI
Here is the main method: It grabs an image from a website and then adds the menu screen (mainContainer) to the contentPane. The menu screen uses GridBagLayout, but it's where the button components are added. Because of this, I can't figure out how to get the CardLayout of the contentPane to listen to the menu screen's buttons. I tried using ContainerListener but that seemed to be a dead end.
public class CasinoDriverGUI {
public static void main(String[] args) throws IOException {
// load the texture resource image
System.out.println("Please wait, Loading Texture : http://www.pngall.com/wp-content/uploads/2016/04/Casino-PNG-Pic.png");
MainContainer.textureImg = ImageIO.read(new URL("http://www.pngall.com/wp-content/uploads/2016/04/Casino-PNG-Pic.png"));
System.out.println("Loading finished. Starting the Casino!");
MainContainer.textureImg = MainContainer.textureImg.getSubimage(0, 0, 580, 309);
// Starting the Swing GUI in the EDT
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
final CardLayout cardLayout = new CardLayout();
JFrame frame = new JFrame("Midnight Casino");
// frame about the size of background src image
frame.setPreferredSize(new Dimension(580, 329));
final Container contentPane = frame.getContentPane();
contentPane.setLayout(cardLayout);
MainContainer mainContainer = new MainContainer();
mainContainer.setPreferredSize( frame.getPreferredSize() );
contentPane.add(mainContainer, "mainContainer");
frame.pack();
frame.setLocationRelativeTo(null);
frame.setResizable(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
As I have it so far, I have just tried using the "menu screen" (mainContainer) to instantiate all the games' panels and use an ActionListener on some buttons to simply call thisGame.setVisible(true). but this is forcing the window to be minimized and re-opened for any change to be detectable.Edit: fixed this.
Any advice on how I can restructure this code to be able to switch the panels from the menu screen to the different game's panels? (Code is below, but the craps and poker GUIs are incomplete.. just using the code as placeholders.
public class CasinoDriverGUI {
public static void main(String[] args) throws IOException {
// load the texture resource image
System.out.println("Please wait, Loading Texture : http://www.pngall.com/wp-content/uploads/2016/04/Casino-PNG-Pic.png");
MainContainer.textureImg = ImageIO.read(new URL("http://www.pngall.com/wp-content/uploads/2016/04/Casino-PNG-Pic.png"));
System.out.println("Loading finished. Starting the Casino!");
MainContainer.textureImg = MainContainer.textureImg.getSubimage(0, 0, 580, 309);
// Starting the Swing GUI in the EDT
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
final CardLayout cardLayout = new CardLayout();
JFrame frame = new JFrame("Midnight Casino");
// frame about the size of background src image
frame.setPreferredSize(new Dimension(580, 329));
final Container contentPane = frame.getContentPane();
contentPane.setLayout(cardLayout);
MainContainer mainContainer = new MainContainer();
mainContainer.setPreferredSize( frame.getPreferredSize() );
contentPane.add(mainContainer, "mainContainer");
frame.pack();
frame.setLocationRelativeTo(null);
frame.setResizable(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
static class MainContainer extends JPanel implements ActionListener
{
public BufferedImage gradientImage = null;
public static BufferedImage textureImg; // static for ease
public static boolean loadingFinished = false;
protected JButton pokerJBtn;
protected JButton crapsJBtn;
CrapsContainer crapsContainer;
PokerContainer pokerContainer;
public MainContainer() {
setBorder(new EmptyBorder(50, 50, 50, 50)); // setting the insets
setLayout(new GridBagLayout());
// working with GridBagConstraints
GridBagConstraints labCnst = new GridBagConstraints();
GridBagConstraints txtCnst = new GridBagConstraints();
labCnst.ipady = txtCnst.ipady = 10;
labCnst.fill = GridBagConstraints.HORIZONTAL;
labCnst.gridwidth = 1;
labCnst.weightx = 0.3;
labCnst.gridx = 2;
labCnst.gridy = 2;
labCnst.ipady = 13;
labCnst.insets = new Insets(0, 0, 0, 150);
pokerJBtn = new CButton("5-Card Poker");
add(pokerJBtn, labCnst);
labCnst.gridx = 2;
labCnst.gridy = 20;
labCnst.ipady = 13;
labCnst.insets = new Insets(0, 0, 0, 150);
crapsJBtn = new CButton("Craps");
add(crapsJBtn, labCnst);
crapsContainer = new CrapsContainer();
pokerContainer = new PokerContainer();
add(crapsContainer);
add(pokerContainer);
crapsContainer.setVisible(false);
pokerContainer.setVisible(false);
//Add Action Listeners
crapsJBtn.addActionListener(this);
pokerJBtn.addActionListener(this);
}
public void changeCompFont(JComponent comp)
{
comp.setForeground(Color.WHITE);
comp.setFont(getFont().deriveFont(Font.BOLD, 13));
}
// To PAINT THE TEXTURE ABOVE THE COMPONENTS
#Override
public void paint(Graphics g)
{
super.paint(g);
Graphics2D g2d = (Graphics2D)g.create(); // cloning
Rectangle2D txRect = new Rectangle2D.Double(0, 0, textureImg.getWidth(), textureImg.getHeight());
TexturePaint txPaint = new TexturePaint(textureImg, txRect);
g2d.setPaint(txPaint);
//make the texture transparent
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.233f));
g2d.fillRect(0, 0, getWidth(), getHeight());
g2d.dispose();// disposing the graphics object
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
if(gradientImage==null || gradientImage.getHeight() != getHeight() )
{
gradientImage = createGradientImg();
}
g2d.drawImage(gradientImage, 0, 0, getWidth(), getHeight(), this);
g2d.dispose();
}
public BufferedImage createGradientImg()
{
BufferedImage image = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
// background gradient paint, linear gradient paint for the background
// Gradient paint rendering could be made more optimized
LinearGradientPaint lgrPaint = new LinearGradientPaint(0.0f, 0.0f, getWidth(), getHeight(),
new float[] { 0.0f, 0.5f, 0.6f, 1.0f },
new Color[] { new Color(0x0530E),// new Color[] { new Color(0x002AFF),
new Color(0x0A31B),
new Color(0x0A31B),
new Color(0x0530E ) });
Graphics2D g2d = (Graphics2D) image.getGraphics();
g2d.setPaint(lgrPaint);
//g2d.shear(0.2, 0);
g2d.fillRect(0, 0, getWidth(), getHeight());
g2d.dispose();
g2d.drawImage(textureImg, 0, 0, getWidth(), getHeight(), null);
return image;
}
#Override
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == pokerJBtn)
{
pokerContainer.setVisible(true);
}
else if (e.getSource() == crapsJBtn){
this.setVisible(false);
invalidate();
crapsContainer.setVisible(true);
revalidate();
repaint();
}
}
}
//Either Flow, Border, or GridBag Layout
static class CrapsContainer extends JPanel implements ActionListener
{...}
//Either Flow, Border, or GridBag Layout
static class PokerContainer extends JPanel implements ActionListener
{...}
//Custom Button to change aesthetic look
class CButton extends JButton
{...}
}
I want to create a window where there is a background image and components on top of that. I have managed to get the components and background 'stacked', but my problem is positioning the components.
I have tried using AbsoluteLayout but it doesn't seem to work.
This is my (beginner) code thus far:
public class RegionPrompt extends JPanel {
public RegionPrompt () throws IOException {
JFrame frame = new JFrame("Map");
GridBagConstraints gbc = new GridBagConstraints();
JPanel pane = new JPanel() {
URL image2 = getClass().getResource("map.jpg");
BufferedImage image = ImageIO.read(image2);
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), this);
}
};
frame.setContentPane(pane);
JPanel pane2 = new JPanel();
pane2.setOpaque(false);
pane2.setSize(DefaultGUI.defaultSize);
pane2.setLayout(new GridBagLayout());
JButton c = new JButton("Map Location");
//gbc.gridx = 0;
//gbc.gridy = 0;
c.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Location information", JOptionPane.INFORMATION_MESSAGE);
}
});
pane2.add(c,gbc);
frame.add(pane2);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(653, 448);
frame.setVisible(true);
}
}
Any help (as well as forgiveness for this code chunk) is greatly appreciated!
In JFrame i have some buttons and BufferedImgae which will be used to draw on it some shapes and pictures using my own methods ( drawLine, drawing raster picture pixel by pisel and so on).
Here is how i add things to JFrame
public class Main extends javax.swing.JPanel {
JPanel panel;
JFrame fr;
Graphics2D g2;
ImageIcon icon;
BufferedImage img;
public void init()
{
fr = new JFrame("Lab 2");
fr.setMinimumSize(new Dimension(1350, 650));
fr.setMaximumSize(fr.getMinimumSize());
fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel glowny = new JPanel(new BorderLayout());
glowny.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
glowny.add(getBorderCenter(), BorderLayout.CENTER);
fr.add(glowny);
fr.pack();
fr.setVisible(true);
}
private JScrollPane getBorderCenter()
{
img = new BufferedImage( fr.getWidth()-40, fr.getHeight()-40-50, BufferedImage.TYPE_INT_RGB); //20+20 odstępy w glowny, 50 - szerokość paska z guzikami
icon = new ImageIcon(img);
return new JScrollPane(new JLabel(icon));
}
public static void main(String [] args)
{
Main m = new Main();
m.init();
}
}
Then i try to draw on BufferedImage using double buffering.
The following example change BufferedImage color from black (current) to white.
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
System.out.println("paintComponent");
WritableRaster raster = img.getRaster();
DataBuffer db = raster.getDataBuffer();
int[] pixels = ((DataBufferInt)db).getData();
int adres = 0;
for (int y = 0; y < img.getHeight(); y++)
{
adres = y * img.getWidth();
for (int x = 0; x < img.getWidth(); x++)
{
pixels[adres] = 16777215;
adres += 1;
}
}
Graphics2D g2dComponent = (Graphics2D) g;
g2dComponent.drawImage(img, null, 0, 0); // draw buffer on screen
}
As i understand repaint() force calling paintComponent(). The problem is that it doesnt matter how i call repaint()
fr.repaint();
glowny.repaint();
repaint();
its never called.
You never add Main to the GUI. You need to add the JPanel that overrides the paintComponent, the this, to the GUI somewhere and you don't. For example, you would need somewhere something like:
someComponentShownInGui.add(this);
I would get rid of the glowny variable and instead use this.
i.e.,
public void init()
{
fr = new JFrame("Lab 2");
fr.setMinimumSize(new Dimension(1350, 650));
fr.setMaximumSize(fr.getMinimumSize());
fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// JPanel glowny = new JPanel(new BorderLayout());
// glowny.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
// glowny.add(getBorderCenter(), BorderLayout.CENTER);
// fr.add(glowny);
setLayout(new BorderLayout();
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
add(getBorderCenter(), BorderLayout.CENTER);
fr.add(this);
fr.pack();
fr.setVisible(true);
}
Note that anything components added to the drawing JPanel will cover up its image, and so you may need to make some non-opaque.
You should add all you components inside a JPanel then override paintComponent method of the panel. (JFrame doesn't have paintComponet but paint method and it's not recommanded to override it)
as said my rectangle does not center vertically in a JPanel with GridLayout. I have 3 columns. 1st and 2nd column have JLabels and they are centered perfect, but my custom JPanel which is just a rectangle does not. It's y coordinate is always on top of the grid's row.
public class CustomJPanel {
/**
* #param args
*/
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 200);
frame.setResizable(false);
JPanel panel = new JPanel(new GridLayout(0,3));
JScrollPane scrollPane = new JScrollPane(panel);
scrollPane.setBounds(10, 50, 320, 200);
scrollPane.setBorder(BorderFactory.createLineBorder(Color.BLACK));
for(int i=0; i<3; i++){
JLabel nameLabel = new JLabel("Test"+i);
JLabel timeLabel = new JLabel();
timeLabel.setText("0h 0m 0s");
panel.add(nameLabel);
panel.add(timeLabel);
panel.add(new Bar());
}
frame.add(scrollPane);
frame.setVisible(true);
}
private static class Bar extends JPanel {
int width = 100;
Dimension maxDimension = new Dimension(100, 20);
#Override
public void paintComponent(Graphics g){
super.paintComponents(g);
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.BLUE);
g2.fillRect(0, 0, width, 5);
}
#Override
public Dimension getMaximumSize() {
return maxDimension;
}
#Override
public Dimension getPreferredSize(){
return this.getMaximumSize();
}
}
}
Do I have to add other methods to my Bar class?
Thank you :)
That happens because you draw rectangle from y=0, but you need to draw that at the middle of your panel. You can fill rectanle in the middle like next :
g2.fillRect(0, getSize().height/2, width, 5);