制作一个按钮 - java

Question

好的,我知道之前已经问过这个问题,但我似乎无法让我的应用程序在其他人的帖子的帮助下工作.

我只是想制作一个带有我制作的图片的屏幕,然后是3个按钮(就像游戏菜单一样).我已完成图像,我现在正试图制作这样的3个按钮.

我的代码目前是这样的:

public class Test {
   static int WIDTH = 700;
   static int HEIGHT = 600;

   public static void main(String[] args) {
      JLabel label = new JLabel();
      JFrame f = new JFrame();
      JPanel panel = new JPanel();
      JButton button = new JButton("hello again");
      button.addActionListener ((ActionListener) new Action1());

      label.setIcon(new ImageIcon("C:\\Users\\barney\\workspace\\game\\res\\background.jpg"));
      f.add(panel);
      f.add(label);
      f.setVisible(true);
      f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
      f.setSize(WIDTH, HEIGHT);
      f.setResizable(false);
      f.setLocationRelativeTo(null);
      f.setTitle("2d platformer v1.1");
      f.setVisible(true);
   }
}

那么我将如何添加图片中的按钮

也可以告诉我,如果我把我的代码设置错了,因为我是java的新手.

谢谢.

Answer 1

我会为此而被打扰......

label.setLayout(new GridBagLayout());
GridBagConstraints gbc = GridBagConstraints();
gbc.insets = new Insets(4, 0, 4, 0);
gbc.gridwidth = GridBagConstraints.REMAINDER;

label.add(button, gbc);
// add the other buttons

更新

就个人而言,我创建了一个自定义JPanel,它将绘制背景,然后使用GridBagLayout上面的方法添加按钮

更新

这个问题的问题是"它取决于"

这取决于您希望如何实现实际按钮.因为你留下了"空白"空格,我假设你打算在图像上渲染一些按钮.我个人会渲染一个完整的图像然后添加一些正常的按钮,但这是你的项目不是我的.

如果您想使用类似JButton(或任何其他Component)的东西,您需要一个自定义布局管理器来帮助您将组件与您留下的空隙对齐.因此,我只是做一个很好的背景,并使用类似的东西GridBagLayout......

我道歉,我可能稍微超过了,但我很开心.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RadialGradientPaint;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class ButtonImage {

    public static void main(String[] args) {
        new ButtonImage();
    }

    public ButtonImage() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new MenuPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public static class MenuPane extends JPanel {

        public static final Rectangle NEW_GAME_BOUNDS = new Rectangle(221, 157, 262, 85);
        public static final Rectangle LOAD_GAME_BOUNDS = new Rectangle(221, 276, 262, 85);
        public static final Rectangle EXIT_GAME_BOUNDS = new Rectangle(221, 396, 262, 85);
        private BufferedImage img;
        private Rectangle selectedBounds;

        public MenuPane() {
            try {
                img = ImageIO.read(getClass().getResource("/vtr1a.jpg"));
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            MouseAdapter mouseHandler = new MouseAdapter() {
                @Override
                public void mouseMoved(MouseEvent e) {
                    if (getNewGameBounds().contains(e.getPoint())) {
                        System.out.println("in new");
                        selectedBounds = getNewGameBounds();
                    } else if (getLoadGameBounds().contains(e.getPoint())) {
                        System.out.println("in load");
                        selectedBounds = getLoadGameBounds();
                    } else if (getExitGameBounds().contains(e.getPoint())) {
                        System.out.println("in exit");
                        selectedBounds = getExitGameBounds();
                    } else {
                        selectedBounds = null;
                    }
                    repaint();
                }

                @Override
                public void mouseClicked(MouseEvent e) {
                    if (getNewGameBounds().contains(e.getPoint())) {
                        System.out.println("New Game");
                    } else if (getLoadGameBounds().contains(e.getPoint())) {
                        System.out.println("Load Game");
                    } else if (getExitGameBounds().contains(e.getPoint())) {
                        System.out.println("Exit Game");
                    }
                }
            };
            addMouseListener(mouseHandler);
            addMouseMotionListener(mouseHandler);
        }

        @Override
        public Dimension getPreferredSize() {
            return img == null ? super.getPreferredSize() : new Dimension(img.getWidth(), img.getHeight());
        }

        protected Point getImageOffset() {

            Point p = new Point();
            if (img != null) {
                p.x = (getWidth() - img.getWidth()) / 2;
                p.y = (getHeight() - img.getHeight()) / 2;
            }

            return p;

        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);

            if (img != null) {
                Graphics2D g2d = (Graphics2D) g.create();

                Point p = getImageOffset();

                g2d.drawImage(img, p.x, p.y, this);

                drawText(g2d, "New Game", getNewGameBounds());
                drawText(g2d, "Load Game", getLoadGameBounds());
                drawText(g2d, "Exit Game", getExitGameBounds());

                g2d.dispose();
            }
        }

        protected void drawText(Graphics2D g2d, String text, Rectangle bounds) {

            FontMetrics fm = g2d.getFontMetrics();

            g2d.setColor(Color.GRAY);
            if (selectedBounds != null) {
                if (bounds.contains(selectedBounds)) {
                    RadialGradientPaint rpg = new RadialGradientPaint(
                            new Point(bounds.x + (bounds.width / 2), bounds.y + (bounds.height / 2)),
                            Math.min(bounds.width, bounds.height), 
                            new float[]{0f, 1f},
                            new Color[]{new Color(252, 180, 42), new Color(97, 205, 181)}
                            );
                    g2d.setPaint(rpg);
                    RoundRectangle2D fill = new RoundRectangle2D.Float(bounds.x, bounds.y, bounds.width, bounds.height, 22, 22);
                    g2d.fill(fill);
                    g2d.setColor(Color.WHITE);
                }
            }

            g2d.drawString(
                    text,
                    bounds.x + ((bounds.width - fm.stringWidth(text)) / 2),
                    bounds.y + ((bounds.height - fm.getHeight()) / 2) + fm.getAscent());

        }

        protected Rectangle getNewGameBounds() {
            return getButtonBounds(NEW_GAME_BOUNDS);
        }

        protected Rectangle getLoadGameBounds() {
            return getButtonBounds(LOAD_GAME_BOUNDS);
        }

        protected Rectangle getExitGameBounds() {
            return getButtonBounds(EXIT_GAME_BOUNDS);
        }

        protected Rectangle getButtonBounds(Rectangle masterBounds) {
            Rectangle bounds = new Rectangle(masterBounds);
            Point p = getImageOffset();
            bounds.translate(p.x, p.y);
            return bounds;
        }
    }
}

您也可以轻松地为每个按钮使用单独的图像,而不是渲染文本/图形,在所需位置渲染图像.

查看自定义绘画和2D图形以获取更多信息.