removerecordwindow.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 RemoveRecordWindow extends JFrame implements ActionListener , WindowListener {
		
	private static RemoveRecordWindow instance = null;

	private final String REMOVE = "Remove";
	private final String CANCEL = "Cancel";
	
	private static int rowIndex;
	private String selection;
	
	private JComboBox dateMenu = new JComboBox();
	
	private Color bgcolor = Color.WHITE;
	
	public static RemoveRecordWindow getInstance( int index ) {
		if( instance == null ) instance = new RemoveRecordWindow( index );
		return instance;
	}
	
	protected RemoveRecordWindow( int index ) { super(); this.makeGUI( index ); }
	
	private void makeGUI( int index ) {
		setTitle( "Remove A Record" );
		Mileage m = Mileage.getInstance();
		Point p = m.getLocation();
		int x = (int)p.getX();
		int y = (int)p.getY();
		setLocation( x + 100 , y + 100 );
		setBackground( bgcolor );
		getContentPane().setLayout( new GridLayout( 3 , 1 ) );
		setDefaultCloseOperation( JFrame.DO_NOTHING_ON_CLOSE );
		addWindowListener( this );
		setSize( new Dimension( 260 , 120 ) );
		addContent( index );
		setVisible( true );
	}
	
	private void addContent( int index ) {
		rowIndex = index;
		JPanel labelPanel = new JPanel();
		labelPanel.setBackground( bgcolor );
		if( index != -1 ) {
			labelPanel.add( new JLabel( "Are you sure you want to remove: " ) );
		} else {
			labelPanel.add( new JLabel( "Please select the entry to remove:" ) );
		}
		getContentPane().add( labelPanel );
		
		Vector entries = Mileage.getInstance().getEntries();
		JPanel datePanel = new JPanel();
		if( index == -1 ) {
			for( int i = 0; i < entries.size(); i++ ) {
				dateMenu.addItem( ( (TableEntry)entries.get( i ) ).getVehicle() + 
					": " + ( (TableEntry)entries.get( i ) ).getDate() );
			}
			dateMenu.setSelectedIndex( dateMenu.getItemCount() - 1 );
			datePanel.add( dateMenu );
		} else {
			selection = (String)( (TableEntry)entries.get( index ) ).getVehicle() + 
				": " + (String)( (TableEntry)entries.get( index ) ).getDate();;
			datePanel.add( new JLabel( selection + "?" ) );
		}
		
		datePanel.setBackground( bgcolor );
		getContentPane().add( datePanel );
		
		JPanel buttonPanel = new JPanel();
		buttonPanel.setLayout( new FlowLayout() );
		buttonPanel.setBackground( bgcolor );
		buttonPanel.add( makeButton( REMOVE ) );
		buttonPanel.add( makeButton( CANCEL ) );
		getContentPane().add( buttonPanel );
	}
	
	
	private JButton makeButton( String text ) {
		JButton button = new JButton( text );
		button.setActionCommand( text );
		button.setToolTipText( text );
		button.addActionListener( this );
		return button;
	}
	
	public void actionPerformed( ActionEvent e ) {
		String command = e.getActionCommand();
		
		if( command.equals( REMOVE ) ) {
			if( rowIndex == -1 ) {
				String curSelection = (String)dateMenu.getSelectedItem();
				Mileage.getInstance().removeRecord( curSelection );
			} else {
				Mileage.getInstance().removeRecord( selection );
			}
			windowClosing( null );
		} else if( command.equals( CANCEL ) ) {
			windowClosing( null );
		}
	}	
	
	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 ) {}
}