基于MVC的简易图形编辑器


标题

基于MVC开发一个简易图形编辑器，要求能够在GUI图形界面做出简单的圆形、矩形、椭圆、线段等简单图形。
结构层次

实验截图

在这里插入图片描述

model 层

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package com.graph.model;

import java.awt.Graphics;
import java.awt.Point;

//定义图形抽象类
public abstract class Graph {
    protected Point pointx;
    protected Point pointy;
   
    public Graph() {}
    public Graph(Point pointx,Point pointy) {
       this.pointx=pointx;
       this.pointy=pointy;
   }

    public Point getPointx() {
        return pointx;
    }

    public void setPointx(Point pointx) {
        this.pointx = pointx;
    }

    public Point getPointy() {
        return pointy;
    }

    public void setPointy(Point pointy) {
        this.pointy = pointy;
    }
    public abstract void paint(Graphics g);
}
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package com.graph.model;

import java.awt.Graphics;
import java.awt.Point;

//画圆
public class Cricle extends Graph {
    public Cricle(Point pointx,Point pointy) {
       super(pointx,pointy);
   }
    @Override
    public void paint(Graphics g) {
        // TODO Auto-generated method stub
        int r=(int) Math.sqrt((pointy.x-pointx.x)*(pointy.x-pointx.x)+
                 (pointy.y-pointx.y)* (pointy.y-pointx.y));
        g.drawOval(pointx.x, pointx.y, r, r);
    }
}
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package com.graph.model;

import java.awt.Graphics;
import java.awt.Point;

//画直线
public class Line extends Graph {
    public Line(Point pointx,Point pointy) {
      super(pointx,pointy);
   }

public void paint(Graphics g) {
       g.drawLine(pointx.x,pointx.y,pointy.x,pointy.y);
   }
}

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package com.graph.model;

import java.awt.Graphics;
import java.awt.Point;

//画椭圆
public class Oval extends Graph {
    public Oval(Point pointx,Point pointy) {
        super(pointx,pointy);
   }
    public void paint(Graphics g) {
           g.drawOval(pointx.x, pointx.y, pointy.x-pointx.x, pointy.y-pointx.y);
    }
}
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package com.graph.model;

import java.awt.Graphics;
import java.awt.Point;

//画矩形
public class Rectangle extends Graph {
    public Rectangle(Point pointx,Point pointy) {
        super(pointx,pointy);
   }

    public void paint(Graphics g) {
           g.drawRect(pointx.x, pointx.y, pointy.x-pointx.x, pointy.y-pointx.y);
    }
}

Controller 层

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package com.graph.controller;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JPanel;

import com.graph.model.Cricle;
import com.graph.model.Graph;
import com.graph.model.Line;
import com.graph.model.Oval;
import com.graph.model.Rectangle;

public class Adapter extends JPanel implements MouseListener{

    String shape = ""; //图案类型
    Point[] point = new Point[2];
    Graph graph;//得到抽象类
   
    public Adapter() {
        super();
        this.setBackground(Color.white);
        point[0] = new Point(-1,-1);
        point[1] = new Point(-1,-1);
        addMouseListener(this);
    }
   
    public String getShape() {
        return shape;
    }

    public void setShape(String shape) {
        this.shape = shape;
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mousePressed(MouseEvent e) {
        // 鼠标按下
        point[0] = new Point(e.getX(),e.getY());

    }

    @Override
    public void mouseReleased(MouseEvent e) {
        //鼠标释放
        point[1] = new Point(e.getX(),e.getY());
        repaint();
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseExited(MouseEvent e) {
        // TODO Auto-generated method stub

    }
   
    public void paint(Graphics g) {
        super.paint(g);
        if(shape.equals("直线")) {
            graph=new Line(point[0],point[1]);
        }else if(shape.equals("矩形")) {
            graph=new Rectangle(point[0],point[1]);
        }else if(shape.equals("椭圆")) {
            graph =new Oval(point[0],point[1]);
        }else if(shape.equals("圆")) {
            graph=new Cricle(point[0],point[1]);
        }
        if(graph!=null)graph.paint(g);
    }
}

View 层

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package com.graph.view;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import com.graph.controller.Adapter;


public class Frame extends JFrame {

   
    private JToggleButton []button=new JToggleButton[4];
    private Adapter adapter=new Adapter();
    ButtonGroup buttonGroup = new ButtonGroup();
    JPanel jp1 = new JPanel();
   
    public Frame() {
       button[0] =new JToggleButton("直线");
       button[1] =new JToggleButton("矩形");
       button[2] =new JToggleButton("椭圆");
       button[3] =new JToggleButton("圆");
       
       DrawShaperListener buttonListener = new DrawShaperListener();
       
       for(int i=0;i<button.length;i++) {
            button[i].addActionListener(buttonListener);
            buttonGroup.add(button[i]);
            jp1.add(button[i]);
        }
       
       getContentPane().add(jp1,BorderLayout.NORTH);
       getContentPane().add(adapter,BorderLayout.CENTER);
       
       this.setSize(400,400);
       this.setTitle("Webb 图形编辑器");
       this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       this.setVisible(true);
   }
   public class DrawShaperListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            for (int i=0;i<button.length;i++){
                if (e.getSource()==button[i]){ //判断来自于哪个按钮
                    adapter.setShape(button[i].getText());
                     }    
                }  
        }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new Frame();
    }

}