java 游戏编程 (七)

现在开始配置键盘
既然要配置键盘，就要使用到swing组件。比如按钮JButton b = new JButton("确定");
在swing绘制组件时，swing会在AWT事件派生线程中进行所有的绘制工作，当组件改变外观时，组件会调用repaint方法请求重画。按下按钮，动画循环中的下次绘图会改变外观。解决这个问题，就要捕获重画请求，并将其忽略。重画请求是发送到RepaintManager对象，我们可以开发一个类NoRepaintManager覆盖原功能。

package com.jsheng.game.util;

import javax.swing.RepaintManager;
import javax.swing.JComponent;

/** function:
 * company: jsheng
 * @author wanghn      [e-mail]
 */
public class NoRepaintManager extends RepaintManager {

    public static void install() {
        RepaintManager repaintManager = new NoRepaintManager();
        repaintManager.setDoubleBufferingEnabled(false);
        RepaintManager.setCurrentManager(repaintManager);
    }

    public void addInvalidComponent(JComponent c) {
    }

    public void addDirtyRegion(JComponent c, int x, int y,
        int w, int h)
    {
    }

    public void markCompletelyDirty(JComponent c) {
    }

    public void paintDirtyRegions() {
    }

}

创建可以配置键盘的测试

package com.jsheng.game.test1;
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.FlowLayout;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.Border;

import com.jsheng.game.util.GameAction;
import com.jsheng.game.util.InputManager;
import com.jsheng.game.util.NoRepaintManager;

/** function:
 * company: jsheng
 * @author wanghn      [e-mail]
 */
public class KeyConfigTest extends InputManagerTest 
implements ActionListener{

    protected GameAction config;

    private JButton playButton;
    private JButton configButton;
    private JButton quitButton;
    private JButton pauseButton;
    private JPanel playButtonSpace;
    public static void main(String[] args) {
        new KeyConfigTest().run();
    }

    private static final String message ="键盘配置";

    private JPanel dialog;
    private JButton okButton;
    private List inputs;

    public void init() {
    	super.init();
    	NoRepaintManager.install();
    	config = new GameAction("config");
    	
    	quitButton = createButton("quit", "退出");
        playButton = createButton("play", "继续");
        pauseButton = createButton("pause", "暂停");
        configButton = createButton("config", "配置");
        playButtonSpace = new JPanel();
        playButtonSpace.setOpaque(false);
        playButtonSpace.add(pauseButton);

        JFrame frame = super.screen.getFullScreenWindow();
        Container contentPane = frame.getContentPane();

        if (contentPane instanceof JComponent) {
            ((JComponent)contentPane).setOpaque(false);
        }

        contentPane.setLayout(new FlowLayout(FlowLayout.LEFT));
        contentPane.add(playButtonSpace);
        contentPane.add(configButton);
        contentPane.add(quitButton);
        inputs = new ArrayList();

        JPanel configPanel = new JPanel(new GridLayout(5,2,2,2));
        addActionConfig(configPanel, moveLeft);
        addActionConfig(configPanel, moveRight);
        addActionConfig(configPanel, jump);
        addActionConfig(configPanel, pause);
        addActionConfig(configPanel, exit);

        // 创建按钮
        JPanel bottomPanel = new JPanel(new FlowLayout());
        okButton = new JButton("OK");
        okButton.setFocusable(false);
        okButton.addActionListener(this);
        bottomPanel.add(okButton);

        JPanel topPanel = new JPanel(new FlowLayout());
        topPanel.add(new JLabel(message));

        Border border =
            BorderFactory.createLineBorder(Color.black);

        dialog = new JPanel(new BorderLayout());
        dialog.add(topPanel, BorderLayout.NORTH);
        dialog.add(configPanel, BorderLayout.CENTER);
        dialog.add(bottomPanel, BorderLayout.SOUTH);
        dialog.setBorder(border);
        dialog.setVisible(false);
        dialog.setSize(dialog.getPreferredSize());

        dialog.setLocation(
            (screen.getWidth() - dialog.getWidth()) / 2,
            (screen.getHeight() - dialog.getHeight()) / 2);
        
        screen.getFullScreenWindow().getLayeredPane().add(dialog,
            JLayeredPane.MODAL_LAYER);
    }

    private void addActionConfig(JPanel configPanel,
        GameAction action)
    {
        JLabel label = new JLabel(action.getName(), JLabel.RIGHT);
        InputComponent input = new InputComponent(action);
        configPanel.add(label);
        configPanel.add(input);
        inputs.add(input);
    }

    public void setPaused(boolean p) {
        super.setPaused(p);
        playButtonSpace.removeAll();
        if (isPaused()) {
            playButtonSpace.add(playButton);
        }
        else {
            playButtonSpace.add(pauseButton);
        }
    }
    public void draw(Graphics2D g) {
        super.draw(g);
        JFrame frame = super.screen.getFullScreenWindow();

        frame.getLayeredPane().paintComponents(g);
    }
    public void actionPerformed(ActionEvent e) {
    	if(e.getSource() == okButton){
    		config.tap();
    		return;
    	}
        Object src = e.getSource();
        if (src == quitButton) {
            super.exit.tap();
        }
        else if (src == configButton) {
            config.tap();
        }
        else if (src == playButton || src == pauseButton) {
            super.pause.tap();
        }
    }


    public void checkSystemInput() {
        super.checkSystemInput();
        if (config.isPressed()) {
            // hide or show the config dialog
            boolean show = !dialog.isVisible();
            dialog.setVisible(show);
            setPaused(show);
        }
    }


    private void resetInputs() {
        for (int i=0; i<inputs.size(); i++) {
            ((InputComponent)inputs.get(i)).setText();
        }
    }


    public JButton createButton(String name, String toolTip) {

       
        String imagePath = "images/menu/" + name + ".png";
        ImageIcon iconRollover = new ImageIcon(imagePath);
        int w = iconRollover.getIconWidth();
        int h = iconRollover.getIconHeight();

        Cursor cursor =
            Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);

        Image image = screen.createCompatibleImage(w, h,
            Transparency.TRANSLUCENT);
        Graphics2D g = (Graphics2D)image.getGraphics();
        Composite alpha = AlphaComposite.getInstance(
            AlphaComposite.SRC_OVER, .5f);
        g.setComposite(alpha);
        g.drawImage(iconRollover.getImage(), 0, 0, null);
        g.dispose();
        ImageIcon iconDefault = new ImageIcon(image);

        image = screen.createCompatibleImage(w, h,
            Transparency.TRANSLUCENT);
        g = (Graphics2D)image.getGraphics();
        g.drawImage(iconRollover.getImage(), 2, 2, null);
        g.dispose();
        ImageIcon iconPressed = new ImageIcon(image);

        JButton button = new JButton();
        button.addActionListener(this);
        button.setIgnoreRepaint(true);
        button.setFocusable(false);
        button.setToolTipText(toolTip);
        button.setBorder(null);
        button.setContentAreaFilled(false);
        button.setCursor(cursor);
        button.setIcon(iconDefault);
        button.setRolloverIcon(iconRollover);
        button.setPressedIcon(iconPressed);

        return button;
    }
    class InputComponent extends JTextField  {

		private static final long serialVersionUID = 1L;
		private GameAction action;

        public InputComponent(GameAction action) {
            this.action = action;
            setText();
            enableEvents(KeyEvent.KEY_EVENT_MASK |
                MouseEvent.MOUSE_EVENT_MASK |
                MouseEvent.MOUSE_MOTION_EVENT_MASK |
                MouseEvent.MOUSE_WHEEL_EVENT_MASK);
        }

        private void setText() {
            String text = "";
            List list = inputManager.getMaps(action);
            if (list.size() > 0) {
                for (int i=0; i<list.size(); i++) {
                    text+=(String)list.get(i) + ", ";
                }
                text = text.substring(0, text.length() - 2);
            }

            synchronized (getTreeLock()) {
                setText(text);
            }

        }


        private void mapGameAction(int code, boolean isMouseMap) {
            if (inputManager.getMaps(action).size() >= 3) {
                inputManager.clearMap(action);
            }
            if (isMouseMap) {
                inputManager.mapToMouse(action, code);
            }
            else {
                inputManager.mapToKey(action, code);
            }
            resetInputs();
            screen.getFullScreenWindow().requestFocus();
        }

        protected void processKeyEvent(KeyEvent e) {
            if (e.getID() == e.KEY_PRESSED) {
                if (e.getKeyCode() == KeyEvent.VK_BACK_SPACE &&
                    inputManager.getMaps(action).size() > 0)
                {
                    inputManager.clearMap(action);
                    setText("");
                    screen.getFullScreenWindow().requestFocus();
                }
                else {
                    mapGameAction(e.getKeyCode(), false);
                }
            }
            e.consume();
        }

        protected void processMouseEvent(MouseEvent e) {
            if (e.getID() == e.MOUSE_PRESSED) {
                if (hasFocus()) {
                    int code = InputManager.getMouseButtonCode(e);
                    mapGameAction(code, true);
                }
                else {
                    requestFocus();
                }
            }
            e.consume();
        }


        protected void processMouseMotionEvent(MouseEvent e) {
            e.consume();
        }

        protected void processMouseWheelEvent(MouseWheelEvent e) {
            if (hasFocus()) {
                int code = InputManager.MOUSE_WHEEL_DOWN;
                if (e.getWheelRotation() < 0) {
                    code = InputManager.MOUSE_WHEEL_UP;
                }
                mapGameAction(code, true);
            }
            e.consume();
        }
    }
}

如果有看不懂的参考以前的篇章。