/*************************
會考題第八題：處理成績
**************************/
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class b8 extends JFrame //畫圖物件是JFrame的擴充
{
    Container c;
    Color bgcolor=Color.white;
    Color textcolor=Color.red;
    JButton rot0,rot1,rot2;
    JRadioButton chbt,enbt,mtbt;
    ButtonGroup radiogroup = new ButtonGroup();
    imgZ1 Z1= new imgZ1();
    radioact RA1=new radioact();
    static String level_name[]={"90~100","80~89","70~79","60~69","0~59"};
    static String class_name[]={"國文","英文","數學"};
    int clspt=0;//設定科目為國文
    int ready=0;//先設定還沒有讀檔
    String name[]=new String [200];
    double score[][]=new double [200][3];//設定最多兩百人
    int level[][]=new int[5][3];//三科，五個等級
    int std_cnt=0;//學生計數器

    public b8()   //建構元
    {
	super("轉換ASCII圖形");
        c=getContentPane();
	rot1=new JButton("開檔");
	rot2=new JButton("顯示");
	rot0=new JButton("離開");
	chbt = new JRadioButton("國文",true);
        enbt = new JRadioButton("英文");
        mtbt = new JRadioButton("數學");
	radiogroup.add(chbt);
        radiogroup.add(enbt);
        radiogroup.add(mtbt);
	setSize(640,600);
	c.setLayout(new FlowLayout(FlowLayout.CENTER));
	c.add(rot1);
	c.add(chbt);
	c.add(enbt);
	c.add(mtbt);
	c.add(rot2);
	c.add(rot0);
	//安裝listener
	rot0.addActionListener(Z1);
	rot1.addActionListener(Z1);
	rot2.addActionListener(Z1);
	chbt.addItemListener(RA1);
	enbt.addItemListener(RA1);
	mtbt.addItemListener(RA1);
	show();
    }
    public void paint(Graphics g)  //真正的畫圖設定
    {
	int i,x,y;
	super.paint(g);
	g.setFont(new Font("Serif",Font.PLAIN,20));
	if (ready==0) //還沒有讀檔
		g.drawString("尚無資料！",5,100);
	else
	{
		//show  表
		g.drawString("學生成績統計表：",5,100);
		g.drawString("分數",20,140);
		g.drawString("人數",100,140);
		for (i=0;i<5;i=i+1)
		{
			g.drawString(level_name[i],20,160+i*25);
			g.drawString(""+level[i][clspt],100,160+i*25);
		}
		//畫統計圖
		g.drawString(class_name[clspt]+"成績統計表：",5,300);
		g.setColor(Color.black);
		g.drawLine(20,320,20,520);
		g.drawLine(20,520,400,520);//座標軸
		g.setColor(Color.blue); 
		//公式 520- cnt * 2
		for (i=0;i<5;i=i+1)
		{
			x=40+i*70;
			y=520-level[i][clspt]*2;
			g.fillRect(x,y,40,level[i][clspt]*2);
			g.drawString(level_name[i],x,550);
		}
	}

	
    }
   /************選擇科目*************************/
    class radioact implements ItemListener 
    {
      public void itemStateChanged(ItemEvent e)
      {
      	 if (e.getSource() == chbt)//國文
      	     clspt = 0;
      	 else if (e.getSource() == enbt)  //英文
      	     clspt = 1;
      	 else //數學
      	     clspt = 2;
      	 //repaint();    
      }
    }//radioact
  class imgZ1 implements ActionListener
  {

    public void file_read() throws IOException //讀取成績檔，順便算成績
     {
	int i,j;
	StringTokenizer stk;
	String getfr;
	BufferedReader fr= new BufferedReader(new FileReader("score"));//開檔
	getfr = fr.readLine(); //取得一行輸入，跳過表頭
	//初始化level陣列
	for (i=0;i<3;i=i+1) 
		for (j=0;j<5;j=j+1)
		level[j][i]=0;
	i=0;
	while (fr.ready())//如果檔案沒有讀完，就繼續處理
         {
            	getfr = fr.readLine(); //取得一行輸入
		stk=new StringTokenizer(getfr," \n\t"); //取得token
		try{
				name[i]=stk.nextToken();
				for (j=0;j<3;j=j+1)
				{//取得成績，計算分佈狀況
					score[i][j]=Double.parseDouble(stk.nextToken());
					if (score[i][j]>=90) level[0][j]++;
					else if (score[i][j]>=80) level[1][j]++;
					else if (score[i][j]>=70) level[2][j]++;
					else if (score[i][j]>=60) level[3][j]++;
					else if (score[i][j]>=0) level[4][j]++;
					else System.out.println(score[i][j]+" 這個成績有問題！");
				}
				i=i+1;
		    }
		catch(NumberFormatException e){ //處理輸入文字
			    System.out.println(getfr+" 這個成績格式有問題！");
			    continue;
		}
	 }
	fr.close();
     }
     public void actionPerformed(ActionEvent e) 
     {
         if (e.getSource()==rot0)//結束
	  {
	     System.exit(0);
	  }
	     
	/***透過檢查那個按鈕呼叫的，就可以判定該做的動作 ***/
        if (e.getSource()==rot1)//開檔
	{
	     try {file_read();}
	     catch(IOException e1)
	     {
		     System.out.println("score Reading Error!");
	     }
	     ready=1;
	}
	 if (e.getSource()==rot2)//顯示
	{
		repaint(); //重新顯示一次
	}

	
     } //actionPerformed
  }//class
    public static void main(String args[]) //程式起點
    {
	b8 app=new b8(); //啟動物件
	app.addWindowListener(new WindowAdapter(){ //匿名內部類別
	public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}); //處理視窗關閉要求
    }
}