/*
	This is a GridBagLyout Manager
	It demonstrate the use of GridBagConstraints
	JRadioButton, JCheckBox and JTextField
	
*
*/

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

public class GridBag extends JFrame
{
	JTextField nametxt, phonetxt, emailtxt;
	JLabel name, phone, email; 
	JButton ok, exit;
	JRadioButton day, week, month, small, large;
	JCheckBox slow, fast, nextday;
	JPanel panel;
	
	public GridBag()
	{
		// Sets the title of the window
		
		setTitle("GridBag Layout Manager");
		
		// Sets the start location of the window
		
		setLocationRelativeTo(null);
		
		// Sets the action when the window is close
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		// Create a panel and set the layout to GridBagLayout
		
		panel = new JPanel();
		panel.setLayout(new GridBagLayout());
		
		// Create the labels
		
		name = new JLabel("Name");
		phone = new JLabel("Phone");
		email = new JLabel("E-Mail");
		
		// Adds the label to GridBagConstraints
		
		addItem(panel, name, 0, 0, 1, 1, GridBagConstraints.EAST);
		addItem(panel, phone, 0, 1, 1, 1, GridBagConstraints.EAST);
		addItem(panel, email, 0, 2, 1, 1, GridBagConstraints.EAST);
		
		// Create the text field
		
		nametxt = new JTextField(20);
		phonetxt = new JTextField(15);
		emailtxt = new JTextField(25);
		
		// Add the text field to the GridBagConstraints
		
		addItem(panel, nametxt, 1, 0, 2, 1, GridBagConstraints.WEST);
		addItem(panel, phonetxt, 1, 1, 1, 1, GridBagConstraints.WEST);
		addItem(panel, emailtxt, 1, 2, 2, 1, GridBagConstraints.WEST);
		
		// Creates a vertical box to organize the buttons
		
		Box timebox = Box.createVerticalBox();
		
		// Creates the radio buttons
		
		day = new JRadioButton("Day");
		week = new JRadioButton("Week");
		month = new JRadioButton("Month");
		
		// Group the buttons together
		
		ButtonGroup timegroup = new ButtonGroup();
		
		timegroup.add(day);
		timegroup.add(week);
		timegroup.add(month);
		
		// Add the buttons to the Box
		
		timebox.add(day);
		timebox.add(week);
		timebox.add(month);
		
		// Sets the bevelBroder title
		
		timebox.setBorder(BorderFactory.createTitledBorder("Time Frame"));
		
		// Adds the box into the GridBagConstraints
		
		addItem(panel, timebox, 0, 3, 1, 1, GridBagConstraints.NORTH);
		
		// Create a new box to handles the size
		
		Box sizebox = Box.createVerticalBox();
		
		// Create the radio buttons
		
		small = new JRadioButton("Small");
		large = new JRadioButton("Large");
		
		// Group the buttons together
		
		ButtonGroup sizegroup = new ButtonGroup();
		
		sizegroup.add(small);
		sizegroup.add(large);
		
		// Add the buttons to the box
		
		sizebox.add(small);
		sizebox.add(large);
		
		// Create a bevelBorder title
		
		sizebox.setBorder(BorderFactory.createTitledBorder("Size"));
		
		// Adds to the GridBagConstraints
		
		addItem(panel, sizebox, 1, 3, 1, 1, GridBagConstraints.NORTH);
		
		// Creates another box layout
		
		Box speed =Box.createVerticalBox();
		
		// Create JCheckBox buttons
		
		slow = new JCheckBox("Slow");
		fast = new JCheckBox("Fast");
		nextday = new JCheckBox("Next Day");
		
		// Group the buttons together
		
		ButtonGroup speedgroup = new ButtonGroup();
		
		speedgroup.add(slow);
		speedgroup.add(fast);
		speedgroup.add(nextday);
		
		// Add the buttons to the box
		
		speed.add(slow);
		speed.add(fast);
		speed.add(nextday);
		
		// Create bevelborder title
		
		speed.setBorder(BorderFactory.createTitledBorder("Speed"));
		
		// Adds to the GridBagConstraints
		
		addItem(panel, speed, 2, 3, 1, 1, GridBagConstraints.NORTH);
		
		// Create the buttons
		
		ok = new JButton("OK");
		exit = new JButton("EXIT");
		
		// Create a horizontal box to hold the buttons
		
		Box buttonbox = Box.createHorizontalBox();
		
		// Add the ok button to the box
		
		buttonbox.add(ok);
		
		// Create a space between ok and exit button
		
		buttonbox.add(Box.createHorizontalStrut(50));
		
		// Add the exit button to the box
		
		buttonbox.add(exit);
		
			
		// Add the button tp the GridBagConstraints
		
		addItem(panel, buttonbox, 2, 4, 1, 1, GridBagConstraints.NORTH);
		
		// Add the panel to the content pane
		
		add(panel);
		
		// Pack everything up
		
		pack();
		
		// Sets the window to be visible
		
		setVisible(true);
		
	}
	
	/*
		Here is the void method of addItem
		It sets the height, width, location, and align of the components
		
	*
	*/
	
	public void addItem(JPanel p, JComponent c, int x, int y, int wid, int hei, int align)
	{
		// Creates a GridBagConstraints
		
		GridBagConstraints grid = new GridBagConstraints();
		
		// Sets the position of the components
		
		grid.gridx = x;
		grid.gridy = y;
		
		// Sets the number of columns & rows span by the components
		
		grid.gridwidth = wid;
		grid.gridheight = hei;
		
		// Tells the grid layout how to apportion space
		
		grid.weightx = 100.00;
		grid.weighty = 100.00;
		
		// It indicates how much space to use as padding around each component
		
		grid.insets = new Insets(5,5,5,5);
		
		// Indicates where to place the component if it doesn't fill the space
		
		grid.anchor = align;
		
		// Indicates whether to stretch the object to fill available space or not
		
		grid.fill = GridBagConstraints.NONE;
		
		// adds to the panel
		
		p.add(c,grid);
		
	}

	public static void main(String[] args)
	{
		new GridBag();
		
	}
}