使用eclipse模仿汽车中控系统屏幕滑动功能 相关代码

以下是一个简单的模拟控制器的示例代码：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class CarController extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;

    private JPanel screenPanel;
    private JButton leftButton;
    private JButton rightButton;
    private int currentScreen = 0;
    private int maxScreens = 3;
    private int screenOffset = 0;
    private Timer timer;

    public CarController() {
        screenPanel = new ScreenPanel();
        leftButton = new JButton("<<");
        rightButton = new JButton(">>");
        leftButton.addActionListener(this);
        rightButton.addActionListener(this);

        JPanel buttonPanel = new JPanel();
        buttonPanel.add(leftButton);
        buttonPanel.add(rightButton);

        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(screenPanel, BorderLayout.CENTER);
        getContentPane().add(buttonPanel, BorderLayout.SOUTH);

        timer = new Timer(10, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (screenOffset == 0) {
                    timer.stop();
                } else {
                    screenOffset--;
                    screenPanel.repaint();
                }
            }
        });
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == leftButton) {
            if (currentScreen == 0) {
                return;
            }
            currentScreen--;
            screenOffset = screenPanel.getWidth();
            timer.start();
        } else if (e.getSource() == rightButton) {
            if (currentScreen == maxScreens - 1) {
                return;
            }
            currentScreen++;
            screenOffset = -screenPanel.getWidth();
            timer.start();
        }
    }

    public static void main(String[] args) {
        CarController controller = new CarController();
        controller.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        controller.setSize(new Dimension(800, 600));
        controller.setVisible(true);
    }

    class ScreenPanel extends JPanel {

        private static final long serialVersionUID = 1L;

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

            int x = screenOffset;
            int y = 0;
            int width = getWidth();
            int height = getHeight();

            switch (currentScreen) {
            case 0:
                g.setColor(Color.BLUE);
                g.fillRect(x, y, width, height);
                break;
            case 1:
                g.setColor(Color.GREEN);
                g.fillRect(x, y, width, height);
                break;
            case 2:
                g.setColor(Color.RED);
                g.fillRect(x, y, width, height);
                break;
            }
        }
    }
}

该代码创建了一个 `JFrame`，包含一个 `JPanel` 展示屏幕和两个 `JButton` 控制屏幕滑动。`ScreenPanel` 类是一个自定义的 `JPanel`，用于绘制屏幕内容。在 `paintComponent` 方法中，我们根据当前屏幕的索引绘制不同的矩形。

在 `actionPerformed` 方法中，我们检查哪个按钮被点击，并根据当前屏幕的索引和屏幕宽度计算出新的屏幕偏移量。然后，我们启动一个 `Timer`，该计时器每次调用时将屏幕偏移量逐渐减小，直到达到 0。在每次偏移时，我们调用 `repaint` 来强制重新绘制 `ScreenPanel`。