/*
	This is a converter program
	
*
*/

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

public class ConvertSelection extends JFrame
{
	 private JPanel panel;
	 private JButton Length;
    private JButton Weight;
	 private JButton Volume;
	 private JButton Temp;
	 private JButton exit;
	 private boolean value = true;
	
	public ConvertSelection()
	{
		// Sets the title of the window
		
		setTitle("Convertion");
		
		// Sets the size of the window
		
		setSize(250, 280);
		
		// Sets the start location of the window
		
		setLocationRelativeTo(null);
		
		// Sets the action if the window is close
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		// Creates a JPanel
		
		panel = new JPanel();
		
		// Create the buttons
		
		Length = new JButton("Length");
		Weight = new JButton("Weight");
		Volume = new JButton("Volume");
		Temp = new JButton("Temperature");
		exit = new JButton("Exit");
		
		// Create button listeners
		
		Length.addActionListener(new ButtonListener());
		Weight.addActionListener(new ButtonListener());
		Volume.addActionListener(new ButtonListener());
		Temp.addActionListener(new ButtonListener());
		exit.addActionListener(new ButtonListener());
		
		// Creates a vertical box layout
		
		Box box = Box.createVerticalBox();
		
		// Adds the button to the vertical box
		
		box.add(Length);
		
		// Creates a space between the components

		box.add(Box.createVerticalStrut(20));
		
		box.add(Weight);
		
		// Creates a space between the components
		
		box.add(Box.createVerticalStrut(20));
		
		box.add(Volume);
		
		// Creates a space between the components
		
		box.add(Box.createVerticalStrut(20));
		
		box.add(Temp);
		
		// Creates a space between the components
		
		box.add(Box.createVerticalStrut(20));
		
		box.add(exit);
		
		// Adds the box to the panel
		
		panel.add(box);
		
		// Adds the panel to the content pane
		
		add(panel);
		
		// Sets the window to be visible
		
		setVisible(value);
		
	}
	
	private class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			try
			{
				/*
					If the length button is pushed
					Call the length class and set
					The visibility of this frame to be false
					
				*
				*/
				
				if(e.getSource()==Length)
				{
					value = false;
					setVisible(value);
					new ConvertLength();
					
				}
				
				/*
					If the weight button is pushed
					Call the weight class and set
					The visibility of this frame to be false
					
				*
				*/
				
				if(e.getSource()==Weight)
				{
					value = false;
					setVisible(value);
					new ConvertWeight();
					
				}
				
				/*
					If the volume button is pushed
					Call the volume class and set
					The visibility of this frame to be false
					
				*
				*/
				
				if(e.getSource()==Volume)
				{
					value = false;
					setVisible(value);
					new ConvertVolume();
					
				}
				
				/*
					If the temperature button is pushed
					Call the tempertaure class and set
					The visibility of this frame to be false
					
				*
				*/
				
				
				if(e.getSource()==Temp)
				{
					value = false;
					setVisible(value);
					new ConvertTemperature();
					
				}
				
				// If exit button is pused exit the program
				
				if(e.getSource()==exit)
				{
					JOptionPane.showMessageDialog(null, "Thank you for using the program");
					System.exit(0);
					
				}
			}
			catch(NullPointerException ae)
			{
			}
			
		}
	
	}
			
	public static void main(String[] args)
	{
		new ConvertSelection();
		
	}
}