1

我正在制作一个游戏，我的框架中有多个面板。panel4 应该包含我的轮子，问题是当我需要 panel4 更大时，panel4 与板上所有其他面板的尺寸相同，因为我希望轮子的图片能够完全显示，因为就目前而言，当我需要全部显示时，只显示轮子的顶部。 

 public static void setUp() throws IOException {        
    frame=new JFrame();
    frame.setLayout(new GridLayout(7,1));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLocation(290, 5);
    frame.setSize(1100, 1100);
    frame.setTitle("Wheel of fortune");

    final JPanel scorePanel=new JPanel();
    final JPanel namePanel=new JPanel();
    final JPanel panel=new JPanel(new GridLayout(1,3,1,1));
    final JPanel panel1=new JPanel();
    final JPanel panel2=new JPanel();
    final JPanel panel3=new JPanel(new GridLayout(2,1,1,1));

    panel3.add(new JLabel("Dead letters/phrases:"));
    panel3.add(LettersOrPhGuessed);

    scorePanel.add(new JLabel("Score Board:"));


    final WheelGui test = new WheelGui();
    final JPanel panel4=test;
    panel4.setSize(800, 600);//this does nothing in the program


    namePanel.add(playerName);
    frame.getContentPane().add(namePanel);
    frame.getContentPane().add(scorePanel);
    frame.getContentPane().add(panel);
    frame.getContentPane().add(panel4);
    frame.getContentPane().add(panel2);
    frame.getContentPane().add(panel1);
    frame.getContentPane().add(panel3);
    frame.setVisible(true);
}

这就是我构建panel4精髓的地方。我试图让这个面板变大，但是当我这样做时，屏幕上似乎没有发生任何事情。任何建议都会很棒。

@SuppressWarnings("serial")
public class WheelGui extends JPanel{
ImageIcon image = new ImageIcon("WheelofFortune.JPG");    
JPanel rotationPanel;  
final int WIDTH = 800;  
final int HEIGHT = 600;  
static double degrees;  

public WheelGui()  
{  
    super();
    this.setPreferredSize(new Dimension(WIDTH,HEIGHT));  
    setBackground(Color.lightGray);  
    setLayout(null);  
    setFocusable(true);  
    rotationPanel = new JPanel(); 

    rotationPanel = new turningCanvas();  
    rotationPanel.setPreferredSize(new Dimension(image.getIconWidth(),image.getIconHeight()));  
    //rotationPanel.setSize(800,600);  
    add(rotationPanel);  
    rotationPanel.setBounds(WIDTH/8, HEIGHT/8, rotationPanel.getPreferredSize().width, rotationPanel.getPreferredSize().height);  
    degrees = 0;  
}  
public void paintComponent (Graphics g)  
{  
    super.paintComponent(g);  
}  
public class turningCanvas extends JPanel  
{  
    public void paintComponent (Graphics g)  
    {  
        super.paintComponent(g);  
        Graphics2D g2d = (Graphics2D)g;  
        g2d.rotate(Math.toRadians(degrees),image.getIconWidth()/2,image.getIconHeight()/2);  
        image.paintIcon(this, g2d, 0, 0);  

    }  
}   
public void rotate(){
    for(int i=0;i<360;i+=4){
        degrees++;
        repaint();
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
4

2 回答 2

3

你有很多问题...

首先，您正在使用GridLayout. GridLayout将以网格模式布局所有组件，并根据父容器的宽度和高度为每个组件分配相同数量的空间。如果您希望组件具有不同GridLayout的尺寸，这不是最佳选择。

其次，您正在使用setPreferredSize. 这是一种不好的做法，因为您没有保护自己免受应用程序的其他部分可能会在以后尝试更改组件的大小。

相反，您应该尽可能覆盖该getPreferredSize方法。

就个人而言，我会推荐一个GridBagLayout，但您可能想查看A Visual Guide to Layout Managers以了解其他选择

更新示例

我知道做您所要求的唯一方法是使用GridBagLayout，它使您可以灵活地定义单个组件将从可用空间中占用多少空间。它是最灵活和最难掌握的布局管理器之一......

在此处输入图像描述

import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.LineBorder;

public class TestLayout25 {

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }
                try {
                    setUp();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        });
    }

    public static void setUp() throws IOException {
        JFrame frame = new JFrame();
        frame.setLayout(new GridBagLayout());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 400);
        frame.setLocationRelativeTo(null);
        frame.setTitle("Wheel of fortune");

        final JPanel scorePanel = new JPanel();
        final JPanel namePanel = new JPanel();
        final JPanel panel = new JPanel(new GridLayout(1, 3, 1, 1));
        final JPanel panel1 = new JPanel();
        final JPanel panel2 = new JPanel();
        final JPanel panel3 = new JPanel(new GridLayout(2, 1, 1, 1));

        panel3.add(new JLabel("Dead letters/phrases:"));
        panel3.add(createPane(Color.RED));

        scorePanel.add(new JLabel("Score Board:"));


        final WheelGui test = new WheelGui();
        final JPanel panel4 = test;
        panel4.setSize(800, 600);//this does nothing in the program

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridwidth = GridBagConstraints.REMAINDER;
        gbc.weightx = 1;
        gbc.fill = GridBagConstraints.HORIZONTAL;

        namePanel.add(new JLabel("Blue"), gbc);
        frame.getContentPane().add(namePanel, gbc);
        frame.getContentPane().add(scorePanel, gbc);
        frame.getContentPane().add(panel, gbc);
        gbc.weighty = 1;
        gbc.fill = GridBagConstraints.BOTH;
        frame.getContentPane().add(panel4, gbc);
        gbc.weighty = 0;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        frame.getContentPane().add(panel2, gbc);
        frame.getContentPane().add(panel1, gbc);
        frame.getContentPane().add(panel3, gbc);
        frame.setVisible(true);
    }

    protected static JPanel createPane(Color color) {

        JPanel panel = new JPanel();
        panel.setBorder(new LineBorder(color));
        return panel;

    }

    public static class WheelGui extends JPanel {

        ImageIcon image = new ImageIcon("WheelofFortune.JPG");
        JPanel rotationPanel;
        final int WIDTH = 800;
        final int HEIGHT = 600;
        static double degrees;

        public WheelGui() {
            super();
            this.setPreferredSize(new Dimension(WIDTH, HEIGHT));
            setBackground(Color.lightGray);
            setLayout(null);
            setFocusable(true);
            rotationPanel = new JPanel();

            rotationPanel = new turningCanvas();
            rotationPanel.setPreferredSize(new Dimension(image.getIconWidth(), image.getIconHeight()));
            //rotationPanel.setSize(800,600);  
            add(rotationPanel);
            rotationPanel.setBounds(WIDTH / 8, HEIGHT / 8, rotationPanel.getPreferredSize().width, rotationPanel.getPreferredSize().height);
            degrees = 0;
        }

        public void paintComponent(Graphics g) {
            super.paintComponent(g);
        }

        public class turningCanvas extends JPanel {

            public void paintComponent(Graphics g) {
                super.paintComponent(g);
                Graphics2D g2d = (Graphics2D) g;
                g2d.rotate(Math.toRadians(degrees), image.getIconWidth() / 2, image.getIconHeight() / 2);
                image.paintIcon(this, g2d, 0, 0);

            }
        }

        public void rotate() {
            for (int i = 0; i < 360; i += 4) {
                degrees++;
                repaint();
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}
于 2013-05-30T23:27:28.277 回答
2

您正在使用 GridLayout。布局负责每个组件的大小和位置，您几乎无能为力。

GridLayout 对象将组件放置在单元格网格中。每个组件占用其单元格内的所有可用空间，并且每个单元格的大小完全相同。

您将不得不使用其他布局。GridBagLayout可能很有用。

于 2013-05-30T23:26:49.450 回答