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

public class CalculatorWindow extends JFrame {
    Computer computer;
    JButton numberButtons[];
    JButton operatorButton[];
    //加减乘除按钮
    JButton dot,fu,back,equation,clear,sqrt,reciprocal;
    JTextField resultShow;
    //显示计算结果
    JTextField showTempResult;
    //临时结果
    JLabel showOperator;
    //运算符
    JTextField showDataItem;
    //当前参与运算的数据项
    JTextArea computerProcess;
    //计算步骤
    JButton saveBtn,copyBtn,clearTextBtn;
    public CalculatorWindow() throws HeadlessException {
        computer=new Computer();
        initView();//设置界面
        initActionListener();//注册监视器
    }
    public void initView(){
        this.setTitle("计算器");
        JPanel left,right;
        resultShow=new JTextField(10);
        resultShow.setHorizontalAlignment(JTextField.LEFT);
        resultShow.setForeground(Color.blue);
        resultShow.setFont(new Font("TimesRoman",Font.BOLD,14));
        resultShow.setEditable(false);
        resultShow.setBackground(Color.lightGray);

        showTempResult=new JTextField();
        showTempResult.setHorizontalAlignment(JTextField.RIGHT);
        showTempResult.setFont(new Font("Arial",Font.BOLD,14));
        showTempResult.setEditable(false);

        showOperator=new JLabel();
        showOperator.setHorizontalAlignment(JTextField.CENTER);
        showOperator.setFont(new Font("Arial",Font.BOLD,18));

        showDataItem=new JTextField();
        showDataItem.setHorizontalAlignment(JTextField.LEFT);
        showDataItem.setBackground(Color.white);
        showDataItem.setFont(new Font("Arial",Font.BOLD,14));
        showDataItem.setEditable(false);

        computerProcess=new JTextArea();
        computerProcess.setEditable(false);
        computerProcess.setFont(new Font("宋体",Font.PLAIN,14));

        numberButtons=new JButton[10];
        for (int i = 0; i <=9; i++) {
            numberButtons[i]=new JButton(" "+i);
            numberButtons[i].setFont(new Font("Arial",Font.BOLD,20));
        }
        operatorButton=new JButton[4];
        String s[]={"+","-","*","/"};
        for (int i = 0; i < 4; i++) {
            operatorButton[i]=new JButton(s[i]);
            operatorButton[i].setFont(new Font("Arial",Font.BOLD,20));
        }
        dot=new JButton(".");
        fu=new JButton("+/-");
        equation=new JButton("=");
        back=new JButton("退格");
        clear=new JButton("C");
        sqrt=new JButton("sqrt");
        reciprocal=new JButton("1/x");
        saveBtn=new JButton("保存");
        copyBtn=new JButton("复制");
        clearTextBtn=new JButton("清除");

        left=new JPanel();
        right=new JPanel();

        //左边布局
        left.setLayout(new BorderLayout());
        //BorderLayout 容器分为五个部分(东南西北中)，每部分只能包含一个组件
        JPanel centerInLeft=new JPanel();
        Box box=Box.createHorizontalBox();
        //创建水平排列组件的Box
        box.add(showTempResult);
        box.add(showOperator);
        box.add(showDataItem);
        left.add(box,BorderLayout.NORTH);
        left.add(centerInLeft,BorderLayout.CENTER);
        centerInLeft.setLayout(new GridLayout(5,5));
        //GridLayout 网格布局5行5列
        centerInLeft.add(numberButtons[1]);
        centerInLeft.add(numberButtons[2]);
        centerInLeft.add(numberButtons[3]);
        centerInLeft.add(operatorButton[0]);
        centerInLeft.add(back);

        centerInLeft.add(numberButtons[4]);
        centerInLeft.add(numberButtons[5]);
        centerInLeft.add(numberButtons[6]);
        centerInLeft.add(operatorButton[1]);
        centerInLeft.add(clear);

        centerInLeft.add(numberButtons[7]);
        centerInLeft.add(numberButtons[8]);
        centerInLeft.add(numberButtons[9]);
        centerInLeft.add(operatorButton[2]);
        centerInLeft.add(reciprocal);

        centerInLeft.add(numberButtons[0]);
        centerInLeft.add(fu);
        centerInLeft.add(dot);
        centerInLeft.add(operatorButton[3]);
        centerInLeft.add(sqrt);

        for (int i = 0; i < 4; i++) {
            centerInLeft.add(new JLabel());
        }
        centerInLeft.add(equation);

        //右边布局
        right.setLayout(new BorderLayout());
        right.add(resultShow,BorderLayout.NORTH);
        right.add(new JScrollPane(computerProcess),BorderLayout.CENTER);
        JPanel southInRight=new JPanel();
        southInRight.add(saveBtn);
        southInRight.add(copyBtn);
        southInRight.add(clearTextBtn);
        right.add(southInRight,BorderLayout.SOUTH);

        JSplitPane split=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,left,right);
        //split 左右布局的分割面板
        add(split,BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置 点击关闭退出程序
        setVisible(true);
        setBounds(200,200,788,258);//设置位置大小
        validate();



    }
    public void initActionListener(){
        HandleDight hd=new HandleDight(this);
        for (int i = 0; i <= 9; i++) {
            numberButtons[i].addActionListener(hd);
        }
        dot.addActionListener(hd);

        HandleOperator ho=new HandleOperator(this);
        for (int i = 0; i < 4; i++) {
            operatorButton[i].addActionListener(ho);
        }
        fu.addActionListener(new HandleFu(this));
        sqrt.addActionListener(new HandleSqrt(this));
        reciprocal.addActionListener(new HandleReciprocal(this));
        back.addActionListener(new HandleBack(this));
        equation.addActionListener(new HandleEquation(this));
        clear.addActionListener(new HandleClear(this));
        HandleFile hf=new HandleFile(this);
        saveBtn.addActionListener(hf);
        copyBtn.addActionListener(hf);
        clearTextBtn.addActionListener(hf);
    }
}