Question

Java新手，是Java的GUI类的新手。我正在制作一个GUI来展示一些游戏，但是在切换面板方面遇到了困难。我读到了关于CardLayout但是我遇到了一个问题，因为我无法让持有不同游戏GUI的JPanel将其事件发送回使用CardLayout的类。（这可能是我出错的地方 - 我无法理解如何正确地构建它。）

这是我的主菜单（名为mainContainer）：

Midnight Casino

这是GUI驱动程序的整体结构：

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

以下是主要方法：它从网站抓取图像，然后将菜单屏幕（mainContainer）添加到contentPane。菜单屏幕使用GridBagLayout，但它是添加按钮组件的位置。因此，我无法弄清楚如何获取contentPane的CardLayout来收听菜单屏幕的按钮。我尝试使用ContainerListener，但这似乎是一个死胡同。

   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);


        }
    });
}

到目前为止，我已经尝试使用“菜单屏幕”（mainContainer）来实例化所有游戏的面板，并在某些按钮上使用ActionListener来简单地调用thisGame.setVisible(true)。 ~~但这会强制窗口最小化并重新打开，以便可以检测到任何更改。~~ 编辑：修复此问题。

关于如何重构此代码以便能够将面板从菜单屏幕切换到不同游戏面板的任何建议？（代码在下面，但是掷骰子和扑克GUI都不完整..只是使用代码作为占位符。

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
{...}

}

在Java中，如何组合CardLayout和GridBagLayout并仍能切换面板？

0 个答案: