recordwindow.java

myMileage是一个简单地系统

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

import java.util.*;

public class RecordWindow extends JFrame implements ActionListener , WindowListener , KeyListener {
		
	private static RecordWindow instance = null;

	private final String OK = "Ok";
	private final String CANCEL = "Cancel";
	
	private Color bgcolor = Color.WHITE;
	
	private JTextField vehicleInput= new JTextField( 10 );
	private JTextField odometerInput= new JTextField( 10 );
	private JTextField gallonsInput= new JTextField( 10 );
	private JTextField costInput= new JTextField( 10 );
	
	private String[] months = { "Jan" , "Feb" , "Mar" , "Apr" , "May" , "Jun" , "Jul" , "Aug" , "Sep" , "Oct" , "Nov" , "Dec" };
	private JComboBox monthBox = new JComboBox();
	private JComboBox dayBox = new JComboBox();
	private JComboBox yearBox = new JComboBox();
	
	private String[] data;
	

	public static RecordWindow getInstance() {
		if( instance == null ) instance = new RecordWindow();
		return instance;
	}
	
	protected RecordWindow() { super(); this.makeGUI(); }
	
	private void makeGUI() {
		setTitle( "New Record" );
		Mileage m = Mileage.getInstance();
		Point p = m.getLocation();
		int x = (int)p.getX();
		int y = (int)p.getY();
		setLocation( x + 100 , y + 100 );
		getContentPane().setLayout( new BorderLayout() );
		setDefaultCloseOperation( JFrame.DO_NOTHING_ON_CLOSE );
		addWindowListener( this );
		addContent();
		pack();
		setVisible( true );
	}
	
	private void addContent() {
		setBackground( bgcolor );
		JPanel inputPanel = new JPanel();
		inputPanel.setLayout( new GridLayout( 5 , 1 ) );
		inputPanel.add( createComboBoxes() );
		inputPanel.add( createInput( "Vehicle:             " , vehicleInput ) );
		inputPanel.add( createInput( "Odometer:         " , odometerInput ) );
		inputPanel.add( createInput( "Gallons:            " ,gallonsInput ) );
		inputPanel.add( createInput( "Cost:                 " , costInput ) );
		//inputPanel.add( new JLabel() );
		inputPanel.setBackground( bgcolor );
		getContentPane().add( inputPanel , BorderLayout.CENTER );
		JPanel buttonPanel = new JPanel();
		buttonPanel.setLayout( new FlowLayout() );
		buttonPanel.setBackground( bgcolor );
		buttonPanel.add( makeButton( OK ) );
		buttonPanel.add( makeButton( CANCEL ) );
		getContentPane().add( buttonPanel , BorderLayout.SOUTH );
	}
	
	private JPanel createComboBoxes() {
		Calendar date = Calendar.getInstance();
		
		for( int i = 0; i < months.length; i++ ) {
			monthBox.addItem( months[i] );
		}
		for( int i = 1; i < 32; i++ ) {
			dayBox.addItem( (new Integer( i )).toString() );
		}
		int curYear = date.get( Calendar.YEAR );
		for( int i = curYear - 1; i < curYear+3; i++ ) {
			yearBox.addItem( (new Integer( i )).toString() );
		}
		int curMonth = date.get( Calendar.MONTH );
		int curDay = date.get( Calendar.DAY_OF_MONTH );
		monthBox.setSelectedIndex( curMonth );
		dayBox.setSelectedIndex( curDay - 1 );
		yearBox.setSelectedIndex( 1 );
		
		monthBox.setBackground( bgcolor );
		dayBox.setBackground( bgcolor );
		yearBox.setBackground( bgcolor );
		
		JPanel datePanel = new JPanel();
		datePanel.setBackground( bgcolor );
		datePanel.setLayout( new FlowLayout() );
		datePanel.add( new JLabel( "Date: " ) );
		JPanel menus = new JPanel();
		menus.setBackground( bgcolor );
		menus.setLayout( new FlowLayout() );
		menus.add( monthBox );
		menus.add( dayBox );
		menus.add( yearBox );
		datePanel.add( menus );
		
		return datePanel;
	
	}
	
	private JPanel createInput( String title , JTextField textField ) {
		JPanel input = new JPanel();
		input.setBackground( bgcolor );
		input.setLayout( new FlowLayout() );
		input.add( new JLabel( title ) );
		textField.addKeyListener( this );
		input.add( textField );
		return input;
	}
	
	private JButton makeButton( String text ) {
		JButton button = new JButton( text );
		button.setActionCommand( text );
		button.setToolTipText( text );
		//button.setPreferredSize( new Dimension( 40 , 40 ) );
		button.addActionListener( this );
		return button;
	}
	
	public void actionPerformed( ActionEvent e ) {
		String command = e.getActionCommand();
		if( command.equals( OK ) ) {
			next();
		} else if( command.equals( CANCEL ) ) {
			windowClosing( null );
		} 
	}
	
	private void next() {
		boolean okToContinue = true;
		String vehicle = vehicleInput.getText();
		String date = (monthBox.getSelectedIndex() + 1) + "/" + dayBox.getSelectedItem() + "/" + yearBox.getSelectedItem();
		String odometer = odometerInput.getText();
		String gallons = gallonsInput.getText();
		String cost = costInput.getText();
		
		Double odometerDouble;
		Double gallonsDouble;
		Double costDouble;
					
		if( vehicle.equals( "" ) || odometer.equals("")||gallons.equals("")||cost.equals("") ) {
			JOptionPane.showMessageDialog( null , "Please fill in all of the fields." , 
											"Oops" , JOptionPane.WARNING_MESSAGE );
			okToContinue = false;
		} else {
			try {
				odometerDouble = new Double( odometer );
				gallonsDouble = new Double( gallons );
				costDouble = new Double(cost);
				
				Vector entries = Mileage.getInstance().getEntries();
				if( entries.size() > 1 ) {
					String lastOdometerVal = ( (TableEntry)entries.get( entries.size() - 1 )).getOdometer();
					if( (new Double( lastOdometerVal )).doubleValue() >= odometerDouble.doubleValue() ) {
						JOptionPane.showMessageDialog( null , 
							"The odometer must increase! Please enter an appropriate value for odometer." , 
							"Oops" , JOptionPane.WARNING_MESSAGE );
						okToContinue = false;
					}
				}
				
			} catch( NumberFormatException nf ) {
				JOptionPane.showMessageDialog( null , 
					"Please fill in only numeric values for odometer, gallons, and 	cost." , 
					"Oops" , JOptionPane.WARNING_MESSAGE );
				okToContinue = false;
			}
		}
		
		if( okToContinue ) {
			String[] record = new String[5];
			record[0] = vehicle;
			record[1] = date;
			record[2] = odometer.toString();
			record[3] = gallons.toString();
			record[4] = cost.toString();
			Mileage.getInstance().addRecord( record );
			windowClosing( null );
		}
	}

	public void keyReleased( KeyEvent e ) {
		if( e.getKeyCode() == KeyEvent.VK_ENTER )
			next();
	}
	public void keyTyped( KeyEvent e ) {}
	public void keyPressed( KeyEvent e ) {}
	
	
	
	
	public void windowClosing( WindowEvent e ) {
		dispose();
		instance = null;
	}
	public void windowActivated( WindowEvent e ) {}
	public void windowClosed( WindowEvent e ) {}
	public void windowDeactivated( WindowEvent e ) {}
	public void windowDeiconified( WindowEvent e ) {}
	public void windowIconified( WindowEvent e ) {}
	public void windowOpened( WindowEvent e ) {}

}