package com.csa.lib.swing;import java.awt.Dimension;import java.awt.Event;import java.awt.FlowLayout;import java.awt.Font;import java.awt.Image;import java.awt.MediaTracker;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.net.URL;import java.text.MessageFormat;import java.util.Vector;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class FontField extends JPanel {	private static final long serialVersionUID = 1L;	public static final String IMG_NAME="fontfield.gif";	Font currentFont;	JLabel label;	JButton openButton;	/**	 * Lista de componentes que reciben notificaciones desde este objeto	 */	Vector actionListeners = new Vector();	public String getFontDescription() {		if (currentFont == null)			return "";		return MessageFormat				.format("{0}, {1}pt  ", new Object[] {						currentFont.getFontName(),						new Integer(currentFont.getSize()) });	}	/**	 * Crear un FontField	 * 	 * @param sfmt	 *            formato para la fecha en el texto.	 */	public FontField(Font f) {				setLayout(new FlowLayout(0, 0, 0));		label = new JLabel(getFontDescription());		label.setMinimumSize(new Dimension(70, 14));		setFont(f);				URL res = FontField.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) {			System.err.println("Error al cargar imagen ");			e.printStackTrace();		}		ImageIcon icon = new ImageIcon(img);		openButton = new JButton(icon); // new JButton("...");		openButton.setPreferredSize(new Dimension(18, 20));		add(label);		add(openButton);		openButton.addActionListener(new ActionListener() {			public void actionPerformed(ActionEvent e) {				if (e.getSource() == openButton)					showHelpWindow();			}		});		label.addMouseListener(new MouseAdapter() {			public void mouseClicked(MouseEvent e) {				if (e.getClickCount() >= 2) {					showHelpWindow();				}			}		});	}	public Font getFont() {		return currentFont;	}	public void setFont(Font f) {		currentFont = f;		if (label==null)			return;		String text = getFontDescription();		label.setFont(f);		label.setText(text);		 		//Graphics g = label.getGraphics();		//int w = g.getFontMetrics().stringWidth(text);		//int h = g.getFontMetrics().getHeight();		//g.dispose();				//label.setPreferredSize(new Dimension(w, h));	}	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();			}		}	}	protected void assignFont(Font f) {		setFont(f);		triggerAction();	}	// Soporte a la ventana	/**	 * Muestra la ventana de ayuda de seleccion de fecha.	 */	void showHelpWindow() {		FontChooserDialog fc = new FontChooserDialog(null);		fc.setFont(currentFont);		if (fc.execute()) {			assignFont(fc.getFont());		}	}	/**	 * 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 FontField(null));		f.pack();		f.setVisible(true);	}}