/*
   
       dsh-identify  Lightweight components for identifiable beans.
       Copyright (c) 2003-2012 held jointly by the individual authors.
   
       This library is free software; you can redistribute it and/or modify it
       under the terms of the GNU Lesser General Public License as published
       by the Free Software Foundation; either version 3 of the License, or (at
       your option) any later version.
  
      This library is distributed in the hope that it will be useful, but WITHOUT
      ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
      FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
      License for more details.
  
      You should have received a copy of the GNU Lesser General Public License
      along with this library;  if not, write to the Free Software Foundation,
      Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.
  
      > http://www.fsf.org/licensing/licenses/lgpl.html
      > http://www.opensource.org/licenses/lgpl-license.php
  
  */
  package org.dishevelled.identify;
  
  import java.awt.ComponentOrientation;
  
  import javax.swing.Action;
  import javax.swing.ImageIcon;
  import javax.swing.JMenuItem;
  
  import org.dishevelled.iconbundle.IconBundle;
  import org.dishevelled.iconbundle.IconSize;
  import org.dishevelled.iconbundle.IconState;
  import org.dishevelled.iconbundle.IconTextDirection;
  
  /**
   * An extension of JMenuItem that displays the name property value
   * and appropriate icon from an icon bundle for an identifiable
   * action.
   *
   * @see IdentifiableAction
   *
   * @author  Michael Heuer
   * @version $Revision$ $Date$
   */
  public final class IdMenuItem
      extends JMenuItem
  {
      /** Default icon size. */
      public static final IconSize DEFAULT_ICON_SIZE = IconSize.DEFAULT_16X16;
  
      /** Default icon text direction. */
      private static final IconTextDirection DEFAULT_ICON_TEXT_DIRECTION = IconTextDirection.LEFT_TO_RIGHT;
  
      /** Icon size. */
      private IconSize iconSize = DEFAULT_ICON_SIZE;
  
      /** Icon text direction. */
      private IconTextDirection iconTextDirection = DEFAULT_ICON_TEXT_DIRECTION;
  
      /** Dirty flag. */
      private transient boolean dirty = true;
  
  
      /**
       * Create a new menu item with the specified identifiable action.
       *
       * @param action identifiable action, must not be null
       */
      public IdMenuItem(final IdentifiableAction action)
      {
          super();
  
          if (action == null)
          {
              throw new IllegalArgumentException("action must not be null");
          }
          setAction(action);
      }
  
      /**
       * Create a new menu item with the specified identifiable action
       * and icon size.
       *
       * @param action identifiable action, must not be null
       * @param iconSize icon size, must not be null
       */
      public IdMenuItem(final IdentifiableAction action, final IconSize iconSize)
      {
          super();
  
          if (action == null)
          {
              throw new IllegalArgumentException("action must not be null");
          }
          setIconSize(iconSize);
          setAction(action);
      }
 
 
     /**
      * Return the icon size for this menu item.
      *
      * @return the icon size for this menu item
      */
     public IconSize getIconSize()
     {
         return iconSize;
     }
 
     /**
      * Set the icon size for this menu item to <code>iconSize</code>.
      *
      * <p>This is a bound property.</p>
      *
      * @param iconSize icon size, must not be null
      */
     public void setIconSize(final IconSize iconSize)
     {
         if (iconSize == null)
         {
             throw new IllegalArgumentException("iconSize must not be null");
         }
         IconSize oldIconSize = this.iconSize;
         this.iconSize = iconSize;
 
         if (!this.iconSize.equals(oldIconSize))
         {
             firePropertyChange("iconSize", oldIconSize, this.iconSize);
             setDirty(true);
         }
     }
 
     /**
      * Return the icon text direction for this menu item.
      *
      * @return the icon text direction for this menu item
      */
     public IconTextDirection getIconTextDirection()
     {
         return iconTextDirection;
     }
 
     /** {@inheritDoc} */
     public void setComponentOrientation(final ComponentOrientation orientation)
     {
         ComponentOrientation oldOrientation = getComponentOrientation();
 
         if (!oldOrientation.equals(orientation))
         {
             if (orientation != null)
             {
                 iconTextDirection = orientation.isLeftToRight()
                     ? IconTextDirection.LEFT_TO_RIGHT : IconTextDirection.RIGHT_TO_LEFT;
 
                 setDirty(true);
             }
         }
 
         super.setComponentOrientation(orientation);
     }
 
     /** {@inheritDoc} */
     public void applyComponentOrientation(final ComponentOrientation orientation)
     {
         ComponentOrientation oldOrientation = getComponentOrientation();
 
         if (!oldOrientation.equals(orientation))
         {
             if (orientation != null)
             {
                 iconTextDirection = orientation.isLeftToRight()
                     ? IconTextDirection.LEFT_TO_RIGHT : IconTextDirection.RIGHT_TO_LEFT;
 
                 setDirty(true);
             }
         }
 
         super.applyComponentOrientation(orientation);
     }
 
     /** {@inheritDoc} */
     protected void configurePropertiesFromAction(final Action action)
     {
         super.configurePropertiesFromAction(action);
 
         if (isDirty())
         {
             rebuild();
         }
     }
 
     /**
      * Set the dirty flag to the logical OR of <code>dirty</code>
      * and the previous dirty state.
      *
      * @param dirty dirty flag
      */
     private void setDirty(final boolean dirty)
     {
         this.dirty = (this.dirty || dirty);
     }
 
     /**
      * Return true if a rebuild of the icons for this menu item is necessary.
      *
      * @return true if a rebuild of the icons for this menu item is necessary
      */
     private boolean isDirty()
     {
         return dirty;
     }
 
     /**
      * Rebuild the icons for this menu item from the icon bundle
      * provided by the identifiable action for this menu item.
      */
     private void rebuild()
     {
         Action action = getAction();
         if ((action != null) && (action instanceof IdentifiableAction))
         {
             IdentifiableAction identifiableAction = (IdentifiableAction) action;
             IconBundle bndl = identifiableAction.getIconBundle();
             setIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.NORMAL, iconSize)));
             setPressedIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.ACTIVE, iconSize)));
             setSelectedIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.SELECTED, iconSize)));
             setRolloverIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.MOUSEOVER, iconSize)));
             setRolloverSelectedIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.SELECTED, iconSize)));
             setDisabledIcon(new ImageIcon(bndl.getImage(this, iconTextDirection, IconState.DISABLED, iconSize)));
         }
         dirty = false;
     }
 }