package java2020spring;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.Array;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Calculator extends JFrame implements ActionListener{
	private static final long serialVersionUID = 1L;
		private static final String COMMANDS = null;
		private static final Icon[] COMMAND = null;
		private static final String M = null;
		
	public static void main(String[] args) {
		Calculator calculator=new Calculator();
		calculator.setVisible(true);
	}
	
	public Calculator() throws HeadlessException  {
		super("Caculator");
    	resultText.setAlignmentX(RIGHT_ALIGNMENT);
    this.setTitle(Const.TITLE);
	this.setSize(Const.FRAME_W,Const.FRAME_H);
	this.setLayout(new BorderLayout());
	this.setLocation(Const.FRAME_X,Const.FRAME_Y);
	this.setResizable(false);
	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	resultText.setBounds(20,18,255,115);
	resultText.setAlignmentX(RIGHT_ALIGNMENT);
	resultText.setEditable(false);
	History.setBounds(290,40,250,370);
	History.setAlignmentX(LEFT_ALIGNMENT);
	History.setEditable(false);
	label.setBounds(400,15,100,20);
	j1.setBounds(20,18,320,115);
	j1.setLayout(new GridLayout());
	j2.setBounds(380,40,250,380);
	j2.setLayout(new GridLayout());
	resultText.setLineWrap(true);
	resultText.setWrapStyleWord(true);
	History.setLineWrap(true);
	History.setWrapStyleWord(true);
	g1.setViewportView(resultText);
	g1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
	g2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
	g2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
	g2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
	j1.add(g1);
	j2.add(g2);
	this.add(j1);
	this.add(j2);
	this.setLayout(null);
	this.add(label);
	int x=20,y=150;
	 for (int i=0;i<KEYS.length;i++)
	 {
	     keys[i]=new JButton();
	     keys[i].setText(KEYS[i]);
	     keys[i].setBounds(x,y,60,40);
	     if(x<250) {
	  x+=65;
	     } 
	     else {
	  x=20;
	  y+=45;
	     }
	     this.add(keys[i]);
	 }
	 for (int i=0;i<KEYS.length;i++)
	 {
	     keys[i].addActionListener(this);
	 }
	 this.setResizable(false);
	 this.setBounds(500,200,670,480);
	 this.setDefaultCloseOperation(EXIT_ON_CLOSE);
	 this.setVisible(true);
	    }
	
	public void init() {
		resultText.setBackground(Color.WHITE);
		JPanel calckeysPanel=new JPanel();
	    resultText.setBackground(Color.WHITE);
	    calckeysPanel.setLayout(new GridLayout(5,5,3,3));
	    for(int i=0;i<keys.length;i++) {
	    	keys[i]=new JButton(KEYS[i]);
	    	calckeysPanel.add(keys[i]);
	    	keys[i].setForeground(Color.BLACK);
	    	keys[i].addActionListener(this);
	    	this.setBackground(Color.LIGHT_GRAY);
	    	this.pack();
	    }
	   
	    }
	    

	public String getA() {
		return a;
	}


	public void setA(String a) {
		this.a = a;
	}
	private String[] KEYS= {"7","8","9","+","sqrt","4","5","6","-","%","1","2","3",
			"*","1/x","+/-","0","=","/",".","(",")","e","x*x","Bac","C","MC",
			"MR","MS","M+"};
	private JButton keys[]=new JButton[KEYS.length];
	private JTextArea resultText=new JTextArea("0");
	private JTextArea History=new JTextArea();
	private JPanel j1=new JPanel();
	private JPanel j2=new JPanel();
	private JScrollPane g1=new JScrollPane(resultText);
	private JScrollPane g2=new JScrollPane(History);
	private JLabel label=new JLabel("历史记录");
	private String a="";
	private JButton[] commands2;
	private Array[] ms;
	private JButton[] ms2;

	public void actionPerformed(ActionEvent e) {
			String label=e.getActionCommand();
			if(label=="=")
			{
				resultText.setText(this.a);
				History.setText(History.getText()+resultText.getText());
				if(label=="=")
				{
					String s[]=houzhui(this.a);
					String result=Result(s);
					this.a=result+"";
					resultText.setText(this.a);
					History.setText(History.getText()+"="+resultText.getText()+"\n");
				}
			}
			else if(label=="AC")
			{
				this.a="";
				resultText.setText("0");
			}
			else if(label=="sqrt")
			{
				String n=k(this.a);
				resultText.setText("sqqrt"+"("+this.a+")"+"="+n);
				History.setText(History.getText()+"sqrt"+"("+this.a+")"+"=");
				this.a=n;
			}
			else if(label=="x*x")
			{
				String m=p(this.a);
				resultText.setText(this.a+"^2"+"="+m);
				History.setText(History.getText()+this.a+"^2"+"=");
				this.a=m;
			}
			else if(label=="e"||label=="pi")
			{
				if(label=="e")
				{
					String m=String.valueOf(2.7182818);
					this.a=this.a+m;
					resultText.setText(this.a);
				}
				if(label=="pi")
				{
					String m=String.valueOf(3.1415926);
					this.a=this.a+m;
					resultText.setText(this.a);
				}
			}
			else
			{
				this.a=this.a+label;
				resultText.setText(this.a);
			}
	}
	

	private String p(String a2) {
		// TODO 自动生成的方法存根
		return null;
	}

	private String k(String a2) {
		// TODO 自动生成的方法存根
		return null;
	}

	private String Result(String[] s) {
		// TODO 自动生成的方法存根
		return null;
	}

	private String[] houzhui(String a2) {
		// TODO 自动生成的方法存根
		return null;
	}
}