xlookandfeel.java

XBrowser是一个完全免费并且开源的Web浏览器

/****************************************************************
*              XBrowser  -  eXtended web Browser                *
*                                                               *
*           Copyright (c) 2000-2001  Armond Avanes              *
*     Refer to ReadMe & License files for more information      *
*                                                               *
*                                                               *
*                      By: Armond Avanes                        *
*       [e-mail]     &    [e-mail]        *
*                http://xbrowser.sourceforge.net/               *
*****************************************************************/
package xbrowser.util;

import xbrowser.*;

import java.util.*;
import java.beans.*;
import javax.swing.*;
import javax.swing.plaf.metal.*;

public class XLookAndFeel extends XProxyObject
{
	public XLookAndFeel(String name, String package_name)
	{
		this(name, package_name, null);
	}

	public XLookAndFeel(String name, String package_name, String resource)
	{
		super(name, package_name, resource);
		propChangeSupport = new PropertyChangeSupport(this);
	}

	public void addPropertyChangeListener(PropertyChangeListener listener)
	{
		propChangeSupport.addPropertyChangeListener(listener);
	}

	public void removePropertyChangeListener(PropertyChangeListener listener)
	{
		propChangeSupport.removePropertyChangeListener(listener);
	}

	public boolean hasTheme()
	{
		return( !themes.isEmpty() );
	}

	public Iterator getThemes()
	{
		return themes.iterator();
	}

	public void addTheme(XTheme theme)
	{
		themes.add(theme);
		Collections.sort(themes);

		if( themes.size()==1 )
			activeTheme = theme;
	}

	public XTheme getActiveTheme()
	{
		return activeTheme;
	}

	public void setActiveTheme(XTheme theme)
	{
		if( themes.contains(theme) )
		{
		XTheme old_theme = activeTheme;

			activeTheme = theme;
			propChangeSupport.firePropertyChange("ActiveTheme", old_theme, activeTheme);
		}
		else
			throw new IllegalArgumentException("setActiveTheme: Theme not found!");
	}

	public void activate() throws Exception
	{
		if( activeTheme!=null )
	        activeTheme.activate();

       	if( this.equals(XProjectConstants.NATIVE_LNF) )
       		activateImpl(UIManager.getSystemLookAndFeelClassName(), getResource());
       	else if( this.equals(XProjectConstants.CROSSPLATFORM_LNF) )
       		activateImpl(UIManager.getCrossPlatformLookAndFeelClassName(), getResource());
       	else
       		activateImpl(getPackageName(), getResource());
	}

	private void activateImpl(String lnf_class_name, String lnf_resource) throws Exception
	{
	LookAndFeel lnf = (LookAndFeel)XRepository.getResourceManager().loadObject(lnf_class_name, lnf_resource);
	ClassLoader cl = lnf.getClass().getClassLoader();
	Hashtable tb = UIManager.getDefaults();

   		/* Registering the custom class-loader.
   		   A work-around for dynamically loading a look&feel from a resource which is not in classpath!
   		   The UIDefaults object use the component's CL by default and easily ignores your custom CL
   		   unless you register the custom CL */
   		tb.put("ClassLoader", cl);

		/* Preload the UI objects!
		   A work-around for UIDefaults class loader problem.
		   "ClassLoader" property is not always used in all Java version!!!

		   // But it's causing some problems! and I'm commenting this section out!
		   */
	/*
	Enumeration enum = tb.keys();

		while( enum.hasMoreElements() )
		{
		Object key = enum.nextElement();

			if( (key instanceof String) && ((String)key).endsWith("UI") )
			{
			Object value = tb.get(key);

				if( value instanceof String )
				{
					try
					{
					Class uic = cl.loadClass((String)value);

						tb.put(uic.getName(), uic);
					}
					catch( Exception e )
					{
					}
				}
			}
		}*/

   		UIManager.setLookAndFeel(lnf);
	}

// Attributes:
	private XTheme activeTheme;
	private LinkedList themes = new LinkedList();
	private PropertyChangeSupport propChangeSupport = null;
}