package textbender.o.swing; // Copyright 2005, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Textbender Software"), to deal in the Textbender Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Textbender Software, and to permit persons to whom the Textbender Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Textbender Software. THE TEXTBENDER SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE TEXTBENDER SOFTWARE OR THE USE OR OTHER DEALINGS IN THE TEXTBENDER SOFTWARE.

import java.awt.Component;
import java.beans.*;
import javax.swing.*;
import textbender.g.hold.*;


/** UIManager utilities.
  */
public final class UIManagerX
{

    private UIManagerX() {}



   // ====================================================================================


    /** Updates the UI of a component tree, whenever the look and feel changes.
      */
    public static class LookAndFeelUpdater
    {

        /** Constructs a LookAndFeelUpdater.
          *
          *     @param rootComponent of tree, usually a top-level window
          *     @param spool for internal holds. When unwound, this instance
          *         releases its internal holds, and is thence disabled.
          */
        public LookAndFeelUpdater( Component rootComponent, Spool spool )
        {
            assert java.awt.EventQueue.isDispatchThread();
            this.rootComponent = rootComponent;

            UIManager.addPropertyChangeListener( listener );
            spool.add( new Hold()
            {
                public void release() { UIManager.removePropertyChangeListener( listener ); }
            });
        }


       //////

        private final PropertyChangeListener listener = new PropertyChangeListener()
        {
            public void propertyChange( PropertyChangeEvent e )
            {
                assert java.awt.EventQueue.isDispatchThread();
                if( e.getPropertyName().equals( "lookAndFeel" )) update();
            }
        };


        protected final Component rootComponent;


        protected void update()
        {
            assert java.awt.EventQueue.isDispatchThread();
            SwingUtilities.updateComponentTreeUI( rootComponent );
        }


    }



}