/*
	Programmer:		Leandro D. Vicario
	Date:			October 8, 2004
	Program Name: ama_grade_applet
*/

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class ama_grade_applet extends Applet implements ActionListener
{

	Label titleLabel = new Label("            AMA Grading System            ");
	
	Label prelimsLabel = new Label("Prelims:   ",Label.LEFT);
		TextField prelimsField = new TextField(10);
		
	Label midtermLabel = new Label("Midterm:   ",Label.LEFT);
		TextField midtermField = new TextField(10);
		
	Label finalsLabel = new Label("Finals:      ",Label.LEFT);
		TextField finalsField = new TextField(10);
	
	Button computeButton = new Button("  Compute  ");
	Button clearButton = new Button("     Clear     ");
	
	Label gradeLabel = new Label("Grade:   ",Label.RIGHT);
	TextField gradeField = new TextField(10);
	
	Label statusLabel = new Label("Status:   ",Label.RIGHT);
	TextField statusField = new TextField("enter the data",10);
	
	public void init()
	{ //begin init-------------------------------
	
		setBackground(Color.lightGray);
		setForeground(Color.black);
		add(titleLabel);

		add(prelimsLabel);
		add(prelimsField);
			prelimsField.setForeground(Color.black);

		add(midtermLabel);
		add(midtermField);
			midtermField.setForeground(Color.black);

		add(finalsLabel);
		add(finalsField);
			finalsField.setForeground(Color.black);

		add(computeButton);
			computeButton.addActionListener(this);
		add(clearButton);
			clearButton.addActionListener(this);
			
		add(gradeLabel);
		add(gradeField);
			gradeField.setForeground(Color.black);

		add(statusLabel);
		add(statusField);
			statusField.setForeground(Color.black);

	} // end init
	
	public void actionPerformed(ActionEvent yhan)
	{
	
	   //declare object strings
	    String strprelims = new String(prelimsField.getText());
	    String strmidterm = new String(midtermField.getText());
	    String strfinals = new String(finalsField.getText());
		
	
		if (yhan.getSource()==computeButton)
		
			{
				if (strprelims.equals(""))
				{
					prelimsField.setText("0");
				}
				
				if (strmidterm.equals(""))
				{
					midtermField.setText("0");
				}				
				
				if (strfinals.equals(""))
				{
					finalsField.setText("0");
				}				
				
				// Converting input to values
				int prelims = Integer.parseInt(prelimsField.getText());
				int midterm = Integer.parseInt(midtermField.getText());
				int finals = Integer.parseInt(finalsField.getText());
		
				// Calculations
		        double grade = (prelims*0.3) + (midterm*0.3) + (finals*0.4);
		        
		        // Output grade		
				gradeField.setText("" + Math.round(grade));
				
				if (grade<75)
				{
					statusField.setText("failed");
			   }   			    
			   else
			   {
			    	statusField.setText("Pass");
				}
				
				if (grade > 100)
				{
					statusField.setText("You may have invalid input");
				}
			} // end if computeButton
			
		if (yhan.getSource()==clearButton)
		{	
			gradeField.setText("");
			prelimsField.setText("");
			midtermField.setText("");
			finalsField.setText("");
			statusField.setText("reenter the data");		
		} // end if clearButton
		
	} // end actionperformed
			
} // end class