package example1;

import java.awt.Dimension;
import javax.swing.*;
import java.util.*;
import java.awt.event.*;

public class Example1 extends JPanel {
	private static final int FRAME_WIDTH = 800;
	private static final int FRAME_HEIGHT = 500;
	private static final int XCOORD = 10;
	private static final int YCOORD = 10;
	private static final Dimension buttonDimensions = new Dimension(200, 30);
	private JFrame frame;
	private String title = "Example1";
	private Box mainBox;
	private JScrollPane outputScrollPane;
	private JTextArea outputTextArea;
	
	public Example1() {
		frame = new JFrame();
		frame.setContentPane(this);
		frame.setLocation(XCOORD, YCOORD);
		frame.setSize(new Dimension(FRAME_WIDTH, FRAME_HEIGHT));
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.setTitle(title);
		
		/* Creating main box to hold other boxes */
		mainBox = Box.createVerticalBox();
		
		/* Adding the box to the JPanel */
		add(mainBox);
		
		/* Adding a Panel to the mainBox */
		mainBox.add(new TopPanel());
		
		/* Creating an area for output */
		outputTextArea = new JTextArea();
		outputTextArea.setEditable(true);
		/* Adding scrollbar capabilities to output area */
		outputScrollPane = new JScrollPane(outputTextArea);
		/* Setting the size of the scroll area */
		/* NOTE: Scroll bars will appear after typing several lines */
		outputScrollPane.setPreferredSize(new Dimension((int)(.50*FRAME_WIDTH), (int)(.50*FRAME_HEIGHT)));
		
		/* Adding output area to main Box */
		mainBox.add(outputScrollPane);
		
		/* Making the frame visible */
		frame.setVisible(true);
	}
	
	private class TopPanel extends JPanel {
		private Box horizontalButtonFormBox, verticalButtonBox;
		private JPanel actualFormDisplayed;
		
		public TopPanel() {
			/* This panel will have two main areas: to the left a set of buttons        */
			/* to decide whether we add a student or faculty, and to the right the form */
			/* where users can input the data.  Data will be read once the submit       */
			/* button is selected (there is no need to press enter for each field)      */
			
			/* Creating the main horizontal box for this top panel */
			add(horizontalButtonFormBox = Box.createHorizontalBox());
			
			
			
			
			/* Creating and initializing vertical box with buttons */
			verticalButtonBox = Box.createVerticalBox();		
			/* Creating the buttons and adding them to the vertical box */
			JButton addStudentButton = new JButton("AddStudent");
			JButton addFacultyButton = new JButton("AddFaculty");
			verticalButtonBox.add(addStudentButton);
			/* The next line adds some empty space (10 pixels) */
			/* You can add horizontal space using createHorizontalStrut */
			verticalButtonBox.add(Box.createVerticalStrut(10));
			verticalButtonBox.add(addFacultyButton);
			/* Adding vertical box to horizontal box */
			horizontalButtonFormBox.add(verticalButtonBox);
			
			
			
			/* By default the student form will appear */
			actualFormDisplayed = new StudentForm();
			/* Adding the actual form to the appropriate box */
			horizontalButtonFormBox.add(actualFormDisplayed);
			
			
			
			/* Lets give some functionality to the buttons */
			/* When user press addStudent button the add student form */
			/* will be displayed */
			addStudentButton.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					/* To change the form we remove the previous form */
					/* and add the new one */
					horizontalButtonFormBox.remove(actualFormDisplayed);
					actualFormDisplayed = new StudentForm();
					horizontalButtonFormBox.add(actualFormDisplayed);
					
					/* Important: because we change the structure of the */
					/* GUI we need to update it.                         */
					updateUI();
				}
			});
		
			
			
			/* When user press addFaculty button the add student form */
			/* will be displayed */
			addFacultyButton.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					/* To change the form we remove the previous form */
					/* and add the new one */
					
					horizontalButtonFormBox.remove(actualFormDisplayed);
					actualFormDisplayed = new FacultyForm();
					horizontalButtonFormBox.add(actualFormDisplayed);
					
					/* Important: because we change the structure of the */
					/* GUI we need to update it.   						 */
					
					updateUI();
				}
			});
		}
		
		private class StudentForm extends JPanel {
			private JTextField name, id;
			private JButton submitButton;
			private JLabel nameLabel, idLabel;
			public StudentForm() {
				nameLabel = new JLabel("Student Name: ");
				idLabel = new JLabel("Student Id: ");
				int nameFieldLength = 10;
				int idFieldLength = 4;
				name = new JTextField(nameFieldLength);
				id = new JTextField(idFieldLength);
				submitButton = new JButton("SubmitInfo");
				/* Changing the size of the submit button */
				submitButton.setPreferredSize(buttonDimensions);
				
				/* Adding to this panel */
				add(nameLabel);
				add(name);
				add(idLabel);
				add(id);
				add(submitButton);
				
				/* When the user presses the submit button they will get */
				/* information displayed on the output area */
				
				submitButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent e) {
						/* Notice how we are able to get the data from the fields */
						/* even though users did not press enter for those fields */
						String results;
						
						results = "Student Name Provided is: " + name.getText() + "\n";
						results += "Student Id Provided is: " + id.getText() + "\n";
						
						/* Notice that to write I use the outputTextArea */
						outputTextArea.setText(results);
					}
				});
			}
		}
		private class FacultyForm extends JPanel {
			private JTextField name, age;
			private JButton submitButton;
			private JLabel nameLabel, ageLabel;
			public FacultyForm() {
				nameLabel = new JLabel("Faculty Name: ");
				ageLabel = new JLabel("Faculty Age: ");
				int nameFieldLength = 10;
				int ageFieldLength = 4;
				name = new JTextField(nameFieldLength);
				age = new JTextField(ageFieldLength);
				submitButton = new JButton("SubmitInfo");
				
				/* Adding to this panel */
				add(nameLabel);
				add(name);
				add(ageLabel);
				add(age);
				add(submitButton);
				
				/* When the user presses the submit button they will get */
				/* information displayed on the output area */
				
				submitButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent e) {
						/* Notice how we are able to get the data from the fields */
						/* even though users did not press enter for those fields */
						String results;
						
						results = "Faculty Name Provided is: " + name.getText() + "\n";
						results += "Faculty Age Provided is: " + age.getText() + "\n";
						
						/* Notice that to write I use the outputTextArea */
						outputTextArea.setText(results);
					}
				});
			}
		}
	}
	
	/* Static block for feel and look */
	/* Comment this block out and see how the feel and look changes */
	/* You can also try this experiment in a Mac */
	
	static {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
	
	public static void main(String[] args) {
		new Example1();
	}
}