Java Swing MVC模式绘制图形模版

MVC模式

1.视图层

import java.awt.*;
import javax.swing.*;

/**
 * 采用MVC结构
 * 视图层view
 * @author wankcn
 */

public class ViewFrame extends JFrame{

    //
    private int canvasWidth;
    private int canvasHeight;

    public ViewFrame(String title, int canvasWidth, int canvasHeight){

        super(title);
        //设置大小实际是画布的大小
        this.canvasWidth = canvasWidth;
        this.canvasHeight = canvasHeight;

        //实例画布相应的对象
        ViewCanvas canvas = new ViewCanvas();
        setContentPane(canvas);

        setResizable(false); //用户不能自由的改变窗口的大小
        //根据加载进来的内容进行一次布局整理 自动调整窗口的大小
        pack();    // 在setResizable(false)后进行pack()，防止在Windows下系统修改frame的尺寸
                   // 具体参见：http://coding.imooc.com/learn/questiondetail/26420.html

        //显示关闭窗口
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    /**
     * 计算屏幕宽和高，用于占满全屏的窗口
     * @param title
     */
    public ViewFrame(String title){

        this(title, 1024, 768);
    }

    // 提供相应getter接口供外部访问
    public int getCanvasWidth(){return canvasWidth;}
    public int getCanvasHeight(){return canvasHeight;}

    // TODO: 设置自己的数据
    private Object data;

    /**
     * 根据传进来的data数据进行相应的渲染
     * @param data 设置相应的数据类型
     */
    public void render(Object data){
        this.data = data;
        //会将ViewCanas清空，重新调用一遍paintComponent
        repaint(); //刷新JFrame中所有控件
    }

    /**
     * 画布内部类 继承JPanel 默认支持双缓存
     */
    private class ViewCanvas extends JPanel{

        public ViewCanvas(){
            // 双缓存
            super(true);
        }

        /**
         * swing需要重新绘制会自动传来一个Graphics g给paintComponent()进行绘制
         * @param g 类似一个上下文连接工具
         */
        @Override
        public void paintComponent(Graphics g) {
            super.paintComponent(g);
            //将Graphics对象转换成2D对象
            Graphics2D g2d = (Graphics2D)g;

            // 抗锯齿
            RenderingHints hints = new RenderingHints(
                    RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON); //VALUE_ANTIALIAS_ON打开抗锯齿
            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.addRenderingHints(hints); //只需要在给g2d中添加抗锯齿

            // 具体绘制
            // TODO： 绘制自己的数据data
        }

        /**
         * 系统创建这个内部类的时候会自动调用Dimension来决定画布的大小
         */
        @Override
        public Dimension getPreferredSize(){
            return new Dimension(canvasWidth, canvasHeight);
        }
    }
}

2.控制层

import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

/**
 * 可视化器 充当控制层MVC
 * @author wankcn
 */

public class Visualizer {

    // TODO: 创建自己的数据
    private Object data;        // 数据
    private ViewFrame frame;    // 视图

    public Visualizer(int sceneWidth, int sceneHeight){

        // 初始化数据
        // TODO: 初始化数据

        // 初始化视图frame
        EventQueue.invokeLater(() -> {
            frame = new ViewFrame("Welcome", sceneWidth, sceneHeight);
            // TODO: 根据情况决定是否加入键盘鼠标事件监听器
            frame.addKeyListener(new MineKeyListener());
            frame.addMouseListener(new MineMouseListener());
            new Thread(() -> {
                run();//控制动画逻辑
            }).start();//创建完直接启动线程
        });
    }

    // 动画逻辑
    private void run(){

        // TODO: 编写自己的动画逻辑
    }

    // TODO: 根据情况决定是否实现键盘鼠标等交互事件监听器类
    private class MineKeyListener extends KeyAdapter{ }
    private class MineMouseListener extends MouseAdapter{ }

    //main函数
    public static void main(String[] args) {
        //MVC模式 指定窗口大小
        int sceneWidth = 800;
        int sceneHeight = 800;

        // TODO: 根据需要设置其他参数，初始化visualizer
        Visualizer visualizer = new Visualizer(sceneWidth, sceneHeight);
    }
}

3.辅助工具类

import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;

import java.lang.InterruptedException;

/**
 * 辅助工具类
 * @author wankcn
 */

public class VisHelper {

    private VisHelper(){}
    //若干常量颜色 来源goole基本色
    public static final Color Red = new Color(0xF44336);
    public static final Color Pink = new Color(0xE91E63);
    public static final Color Purple = new Color(0x9C27B0);
    public static final Color DeepPurple = new Color(0x673AB7);
    public static final Color Indigo = new Color(0x3F51B5);
    public static final Color Blue = new Color(0x2196F3);
    public static final Color LightBlue = new Color(0x03A9F4);
    public static final Color Cyan = new Color(0x00BCD4);
    public static final Color Teal = new Color(0x009688);
    public static final Color Green = new Color(0x4CAF50);
    public static final Color LightGreen = new Color(0x8BC34A);
    public static final Color Lime = new Color(0xCDDC39);
    public static final Color Yellow = new Color(0xFFEB3B);
    public static final Color Amber = new Color(0xFFC107);
    public static final Color Orange = new Color(0xFF9800);
    public static final Color DeepOrange = new Color(0xFF5722);
    public static final Color Brown = new Color(0x795548);
    public static final Color Grey = new Color(0x9E9E9E);
    public static final Color BlueGrey = new Color(0x607D8B);
    public static final Color Black = new Color(0x000000);
    public static final Color White = new Color(0xFFFFFF);


    //绘制空心圆
    public static void strokeCircle(Graphics2D g, int x, int y, int r){

        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.draw(circle);
    }

    //绘制实心圆
    public static void fillCircle(Graphics2D g, int x, int y, int r){

        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.fill(circle);
    }

    //绘制空心矩形
    public static void strokeRectangle(Graphics2D g, int x, int y, int w, int h){

        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.draw(rectangle);
    }

    //绘制实心矩形
    public static void fillRectangle(Graphics2D g, int x, int y, int w, int h){

        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.fill(rectangle);
    }

    //设置图形颜色
    public static void setColor(Graphics2D g, Color color){
        g.setColor(color);
    }

    public static void setStrokeWidth(Graphics2D g, int w){
        int strokeWidth = w;
        g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
    }

    //控制暂停时间
    public static void pause(int t) {
        try {
            Thread.sleep(t);
        }
        catch (InterruptedException e) {
            System.out.println("Error sleeping");
        }
    }

    //绘制图片
    public static void putImage(Graphics2D g, int x, int y, String imageURL){

        ImageIcon icon = new ImageIcon(imageURL);
        Image image = icon.getImage();

        g.drawImage(image, x, y, null);
    }

    //绘制字符串
    public static void drawText(Graphics2D g, String text, int centerx, int centery){

        if(text == null)
            throw new IllegalArgumentException("Text is null in drawText function!");

        FontMetrics metrics = g.getFontMetrics();
        int w = metrics.stringWidth(text);
        int h = metrics.getDescent();
        g.drawString(text, centerx - w/2, centery + h);
    }
}