main.java

使用java语言编写的画图板

/*
 * Main.java
 *
 * Created on 2005年12月10日, 下午6:19
 */

package painttool;

/**
 *
 * @author Kevin
 */
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Main extends Frame implements ActionListener
{
    public Main() 
    {
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				dispose(); 
				System.exit(0);
			}
		});
    }	
    public static Panel linep=new Panel();    
    public static Panel circlep=new Panel();
    public static Panel square=new Panel();
    public static Main mainFrame=new Main();
    public static CardLayout card=new CardLayout();
    //画直线
    static MenuItem dda=new MenuItem("DDA");
    static MenuItem l2=new MenuItem("中点");   
    
    static MenuItem c2=new MenuItem("中点画圆");
    
    static MenuItem s1=new MenuItem("aa");
    static MenuItem s2=new MenuItem("bb");
    static MenuItem save=new MenuItem("保存");
    static MenuItem exit=new MenuItem("退出");
    static MenuItem chgclr=new MenuItem("改变颜色");

    public static void main(String[] args) 
    {             
        Menu drawline=new Menu("画直线");
        Menu drawcircle=new Menu("画圆");
        Menu drawsquare=new Menu("画方");
        MenuBar mb=new MenuBar();
        mainFrame.setMenuBar(mb);          
        Menu m=new Menu("画图");
        Menu file=new Menu("菜单选项");
        Menu help=new Menu("帮助文档");
        
        mb.add(m);
        mb.add(file);
        mb.add(help);
        
        m.add(drawline);
        m.add(drawcircle);
        m.add(drawsquare);
        
        file.add(save);
        file.add(chgclr);
        file.add(exit);
        
        drawline.add(dda);
        drawline.add(l2);
    
        drawcircle.add(c2);
        
        drawsquare.add(s1);
        drawsquare.add(s2);
        
	dda.addActionListener(mainFrame);
        l2.addActionListener(mainFrame);
        
        c2.addActionListener(mainFrame);
              
        mainFrame.setLayout(card);
        mainFrame.add("first",linep);
        mainFrame.add("second",circlep);
        mainFrame.add("third",square);
      
        mainFrame.setSize(400, 400);  
	mainFrame.setTitle("Paintline");	
	mainFrame.setVisible(true);
    }
    public void actionPerformed(ActionEvent e)
    {
    	if(e.getSource()==dda||e.getSource()==l2)  //画直线模块
        {
          linep.removeAll();
          linepanel lp=new linepanel();    //调用直线模块画直线   
        }
        else
        {
            if(e.getSource()==c2);//画圆
            {
                circlep.removeAll();
                circlepanel cl=new circlepanel();
            }
        }
        //if(e.getSource()==drawsquare);//画方
        //{   }
    }
}