/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.gui;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.plaf.*;import javax.swing.plaf.metal.MetalLookAndFeel;import javax.swing.plaf.metal.DefaultMetalTheme;/** * This class reads theme descriptions from a GUIResourceBundle and uses them * to specify colors and fonts for the Metal look-and-feel. **/public class ThemeManager {    JFrame frame;                  // The frame which themes are applied to    GUIResourceBundle resources;   // Properties describing the themes    /**      * Build a ThemeManager for the frame and resource bundle.  If there     * is a default theme specified, apply it to the frame     **/    public ThemeManager(JFrame frame, GUIResourceBundle resources) {	this.frame = frame;	this.resources = resources;	String defaultName = getDefaultThemeName();	if (defaultName != null) setTheme(defaultName);    }    /** Look up the named theme, and apply it to the frame */    public void setTheme(String themeName) {	// Look up the theme in the resource bundle	Theme theme = new Theme(resources, themeName);	// Make it the current theme	MetalLookAndFeel.setCurrentTheme(theme);	// Re-apply the Metal look-and-feel to install new theme	try { UIManager.setLookAndFeel(new MetalLookAndFeel()); }	catch(UnsupportedLookAndFeelException e) {}	// Propagate the new l&f across the entire component tree of the frame	SwingUtilities.updateComponentTreeUI(frame);    }    /** Get the "display name" or label of the named theme */    public String getDisplayName(String themeName) {	return resources.getString(themeName + ".name", null);    }    /** Get the name of the default theme, or null */    public String getDefaultThemeName() {	return resources.getString("defaultTheme", null);    }    /**     * Get the list of all known theme names.  The returned values are     * theme property names, not theme display names.     **/    public String[] getAllThemeNames() {	java.util.List names = resources.getStringList("themelist");	return (String[]) names.toArray(new String[names.size()]);    }    /**     * Get a JMenu that lists all known themes by display name and     * installs any selected theme.     **/    public JMenu getThemeMenu() {	String[] names = getAllThemeNames();	String defaultName = getDefaultThemeName();	JMenu menu = new JMenu("Themes");	ButtonGroup buttongroup = new ButtonGroup();	for(int i = 0; i < names.length; i++) {	    final String themeName = names[i];	    String displayName = getDisplayName(themeName);	    JMenuItem item = menu.add(new JRadioButtonMenuItem(displayName));	    buttongroup.add(item);	    if (themeName.equals(defaultName)) item.setSelected(true);	    item.addActionListener(new ActionListener() {		    public void actionPerformed(ActionEvent event) {			setTheme(themeName);		    }		});	}	return menu;    }    /**     * This class extends the DefaultMetalTheme class to return Color and     * Font values read from a GUIResourceBundle     **/    public static class Theme extends DefaultMetalTheme {	// These fields are the values returned by this Theme	String displayName;	FontUIResource controlFont, menuFont, smallFont;	FontUIResource systemFont, userFont, titleFont;	ColorUIResource primary1, primary2, primary3;	ColorUIResource secondary1, secondary2, secondary3;	/**	 * This constructor reads all the values it needs from the	 * GUIResourceBundle.  It uses intelligent defaults if properties	 * are not specified.	 **/	public Theme(GUIResourceBundle resources, String name) {	    // Use this theme object to get default font values from	    DefaultMetalTheme defaultTheme = new DefaultMetalTheme();	    // Look up the display name of the theme	    displayName = resources.getString(name + ".name", null);	    // Look up the fonts for the theme	    Font control = resources.getFont(name + ".controlFont", null);	    Font menu = resources.getFont(name + ".menuFont", null);	    Font small = resources.getFont(name + ".smallFont", null);	    Font system = resources.getFont(name + ".systemFont", null);	    Font user = resources.getFont(name + ".userFont", null);	    Font title = resources.getFont(name + ".titleFont", null);	    // Convert fonts to FontUIResource, or get defaults	    if (control != null) controlFont = new FontUIResource(control);	    else controlFont = defaultTheme.getControlTextFont();	    if (menu != null) menuFont = new FontUIResource(menu);	    else menuFont = defaultTheme.getMenuTextFont();	    if (small != null) smallFont = new FontUIResource(small);	    else smallFont = defaultTheme.getSubTextFont();	    if (system != null) systemFont = new FontUIResource(system);	    else systemFont = defaultTheme.getSystemTextFont();	    if (user != null) userFont = new FontUIResource(user);	    else userFont = defaultTheme.getUserTextFont();	    if (title != null) titleFont = new FontUIResource(title);	    else titleFont = defaultTheme.getWindowTitleFont();	    // Look up primary and secondary colors	    Color primary = resources.getColor(name + ".primary", null);	    Color secondary = resources.getColor(name + ".secondary", null);	    // Derive all six colors from these two, using defaults if needed	    if (primary != null) primary1 = new ColorUIResource(primary);	    else primary1 = new ColorUIResource(102, 102, 153);	    primary2 = new ColorUIResource(primary1.brighter());	    primary3 = new ColorUIResource(primary2.brighter());	    if (secondary != null) secondary1 = new ColorUIResource(secondary);	    else secondary1 = new ColorUIResource(102, 102, 102);	    secondary2 = new ColorUIResource(secondary1.brighter());	    secondary3 = new ColorUIResource(secondary2.brighter());	}	// These methods override DefaultMetalTheme and return the property	// values we looked up and computed for this theme	public String getName() { return displayName; }	public FontUIResource getControlTextFont() { return controlFont;}	public FontUIResource getSystemTextFont() { return systemFont;}	public FontUIResource getUserTextFont() { return userFont;}	public FontUIResource getMenuTextFont() { return menuFont;}	public FontUIResource getWindowTitleFont() { return titleFont;}	public FontUIResource getSubTextFont() { return smallFont;}	protected ColorUIResource getPrimary1() { return primary1; } 	protected ColorUIResource getPrimary2() { return primary2; }	protected ColorUIResource getPrimary3() { return primary3; }	protected ColorUIResource getSecondary1() { return secondary1; }	protected ColorUIResource getSecondary2() { return secondary2; }	protected ColorUIResource getSecondary3() { return secondary3; }    }}