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

import javax.swing.*;


public class CaluateFrame extends JFrame implements ActionListener{

    
    /**
     * @author: mafer
     */
    //面板和滚动条
    private JPanel jp;//总的面板
    private JPanel jp1,jsp_jp2 = null;
    private JScrollPane jsp = null;
    //输入框
    private JTextField jtf;
    //数字键
    private JButton jb0,jb1,jb2,jb3,jb4,jb5,jb6,jb7,jb8,jb9;
    //运算符键
    private JButton jbDian,jbAdd,jbSub,jbSum,jbMul,jbChu,jbYuShu,jbZhengFU;
    //功能键
    private JButton jbDel,jbClear;
    //存储  每次结果的文本框
    private JTextArea jtaResult;
    //设置程序坐标及大小      参数
    private static final Rectangle size = new Rectangle(100, 100, 280, 400);
    Font f = new Font("宋体",Font.PLAIN,28);
    Font f2 = new Font("宋体",Font.PLAIN,18);
    
    //界面制作
    
    CaluateFrame(){
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setBounds(size);
//        this.setResizable(false);    //设置大小不可调整
        
        jp = new JPanel(new BorderLayout());
//        jp = new JPanel();
//        this.setContentPane(jp);
        this.add(jp);
        
        //在北边添加 输入框
        jtf = new JTextField("", 10);
        jtf.setFont(f);
        jp.add(jtf,BorderLayout.NORTH);
        
        //在中间添加按钮控件
        
        
        //jb0,jb1,jb2,jb3,jb4,jb5,jb6,jb7,jb8,jb9;
        jb0 = new JButton("0");
        jb1 = new JButton("1");
        jb2 = new JButton("2");
        jb3 = new JButton("3");
        jb4 = new JButton("4");
        jb5 = new JButton("5");
        jb6 = new JButton("6");
        jb7 = new JButton("7");
        jb8 = new JButton("8");
        jb9 = new JButton("9");
        
        //jbDian,jbAdd,jbSum,jbCheng,jbChu,jbYuShu,jbZhengFU;
        jbDian  = new JButton(".");
        jbAdd = new JButton("+");
        jbSub = new JButton("-");
        jbMul = new JButton("*");
        jbChu = new JButton("/");
        jbYuShu = new JButton("%");
        jbZhengFU = new JButton("+_");
        jbSum = new JButton("=");
        //jbDel,jbClear
        jbDel = new JButton("del");
        jbClear = new JButton("c");
        
        //添加上述按钮到中间面板中
        jp1 = new JPanel(new GridLayout(5,4));
        jp1.add(jbDel);        
        jp1.add(jbClear);
        jp1.add(jbZhengFU);
        jp1.add(jbYuShu);    //第一行 
        jp1.add(jb1);
        jp1.add(jb2);
        jp1.add(jb3);
        jp1.add(jbAdd);    //第二行
        jp1.add(jb4);
        jp1.add(jb5);
        jp1.add(jb6);
        jp1.add(jbSub);    //第三行
        jp1.add(jb7);
        jp1.add(jb8);
        jp1.add(jb9);
        jp1.add(jbMul);    //第四行
        jp1.add(jb0);
        jp1.add(jbDian);
        jp1.add(jbSum);
        jp1.add(jbChu);    //第五行
    
        jp.add(jp1,BorderLayout.CENTER);
                
        //南部  ---显示每次计算后的表达式
        jtaResult = new JTextArea("显示每次的表达式\n",4,30);
        jtaResult.setFont(f2);
        jsp_jp2 = new JPanel();
        jsp = new JScrollPane(jsp_jp2,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        jsp_jp2.add(jtaResult);
        
        jp.add(jsp,BorderLayout.SOUTH);
        
//        this.add(jtf);
//        this.add(jp1);
//        this.getContentPane().add(jsp);
    }
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new CaluateFrame();
    }

    public void actionPerformed(ActionEvent arg0) {
        // TODO Auto-generated method stub
        
    }

}