package com.csa.lib.swing;import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.Event;import java.awt.FlowLayout;import java.awt.Image;import java.awt.MediaTracker;import java.awt.Point;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.WindowEvent;import java.awt.event.WindowFocusListener;import java.net.URL;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.Vector;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;import com.toedter.calendar.JCalendar;public class DateField extends JPanel implements ActionListener {	private static final long serialVersionUID = 1L;	public static final String IMG_NAME="datefield.gif";	SimpleDateFormat sdf;	Date currentDate;	JTextField textField;	JButton openButton;	JDialog helpWindow;	JCalendar jCalendar;	JButton bOk;	JButton bCancel;	JButton bClear;	Vector actionListeners = new Vector();	/**	 * Crea un datepicker con un formato por omision	 */	public DateField() {		this("dd/MM/yyyy");	}	/**	 * Crear un datepicker	 * 	 * @param sfmt	 *            formato para la fecha en el texto.	 */	public DateField(String sfmt) {		sdf = new SimpleDateFormat(sfmt);		setLayout(new FlowLayout(0, 0, 0));		textField = new JTextField(sfmt.length());		URL res = DateField.class.getResource(IMG_NAME);		Image img = Toolkit.getDefaultToolkit().getImage(res);		MediaTracker m = new MediaTracker(this);		m.addImage(img, 0);		try{		m.waitForAll();		}catch(Exception e){			e.printStackTrace();		}		ImageIcon icon = new ImageIcon(img);		openButton = new JButton(icon); //new JButton("...");		openButton.setPreferredSize(new Dimension(18, 20));		add(textField);		add(openButton);		openButton.addActionListener(this);		textField.addActionListener(this);		textField.addMouseListener(new MouseAdapter() {			public void mouseClicked(MouseEvent e) {				if (e.getClickCount() >= 2) {					showHelpWindow();				}			}		});	}		public Date getDate() {		return currentDate;	}	public void setDate(Date d) {		currentDate = d;	}	public JTextField getTextField() {		return textField;	}	public JButton getOpenButton() {		return openButton;	}	// Soporte a eventos	public void addActionListener(ActionListener l) {		actionListeners.add(l);	}	public void removeActionListener(ActionListener l) {		actionListeners.remove(l);	}	protected void triggerAction() {		for (int i = 0; i < actionListeners.size(); i++) {			ActionListener l = (ActionListener) actionListeners.get(i);			ActionEvent a = new ActionEvent(this, Event.ACTION_EVENT, "");			try {				l.actionPerformed(a);			} catch (Exception e) {				e.printStackTrace();			}		}	}	// Listeners	public void actionPerformed(ActionEvent e) {		// System.out.println("DatePicker.actionPerformed()");		if (e.getSource() == openButton) {			if (helpWindow == null)				showHelpWindow();			return;		} else if (e.getSource() == bOk) {			assignDate(jCalendar.getCalendar().getTime());		} else if (e.getSource() == bClear) {			assignDate(null);		} else if (e.getSource() == textField) {			try {				String text = textField.getText().trim();				if (!text.equals(""))					assignDate(sdf.parse(text));				else					assignDate(null);			} catch (ParseException e1) {			}		}		hideHelpWindow();	}	private void assignDate(Date d) {		currentDate = d;		if (d != null)			textField.setText(sdf.format(currentDate));		else			textField.setText("");		triggerAction();	}		// Soporte a la ventana	/**	 * Esconde la ventan de ayuda de seleccion de fecha.	 */	void hideHelpWindow() {		if ((helpWindow != null) && (helpWindow.isShowing())) {			helpWindow.dispose();			helpWindow = null;					}	}	/**	 * Muestra la ventana de ayuda de seleccion de fecha.	 */	void showHelpWindow() {		Point p = getLocationOnScreen();		p.y += getHeight();		helpWindow = new JDialog();		helpWindow.setUndecorated(true);		helpWindow.setLocation(p);		jCalendar = new JCalendar();		Calendar cal = Calendar.getInstance();		if (currentDate != null)			cal.setTime(currentDate);		jCalendar.setCalendar(cal);		helpWindow.getContentPane().setLayout(new BorderLayout());		helpWindow.getContentPane().add(jCalendar, BorderLayout.CENTER);		JPanel panel = new JPanel(new FlowLayout());		bOk = new JButton("Ok");		bCancel = new JButton("Cancel");		bClear = new JButton("Clear");		panel.add(bOk);		panel.add(bCancel);		panel.add(bClear);		for (int i = 0; i < panel.getComponentCount(); i++)			((JButton) panel.getComponent(i)).addActionListener(this);		helpWindow.getContentPane().add(panel, BorderLayout.SOUTH);		helpWindow.pack();		helpWindow.addWindowFocusListener(new WindowFocusListener() {			public void windowGainedFocus(WindowEvent e) {				// System.out.println("windowGainedFocus");			}			public void windowLostFocus(WindowEvent e) {				// System.out.println("windowLostFocus");				hideHelpWindow();			}		});		helpWindow.setVisible(true);	}	/**	 * Ejemplo	 * @param args	 */	public static void main(String[] args) {		JFrame f = new JFrame();		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);		f.getContentPane().setLayout(new FlowLayout());		f.getContentPane().add(new JLabel("Fecha"));		f.getContentPane().add(new DateField("dd/MM/yyyy"));		f.pack();		f.setVisible(true);	}}