/* This file is part of the KDE libraries
    Copyright (C) 1999 Waldo Bastian (bastian@kde.org)

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; version 
    2 of the License.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/
//-----------------------------------------------------------------------------
// KDE color collection.

#ifndef KDELIBS_KCOLORCOLLECTION_H
#define KDELIBS_KCOLORCOLLECTION_H

#include <kdeui_export.h>

#include <QtGui/QColor>
#include <QtCore/QList>
#include <QtCore/QString>
#include <QtCore/QStringList>

/**
 * Class for handling color collections ("palettes").
 *
 * This class makes it easy to handle color collections, sometimes referred to
 * as "palettes". This class can read and write collections from and to a file.
 *
 * This class uses the "GIMP" palette file format.
 *
 * @author Waldo Bastian (bastian@kde.org)
 **/
class KDEUI_EXPORT KColorCollection
{
public:
   /**
    * Query which KDE color collections are installed.
    *
    * @return A list with installed color collection names.
    */
   static QStringList installedCollections();

   /**
    * KColorCollection constructor. Creates a KColorCollection from a file
    * the filename is derived from the name.
    * @param name The name of collection as returned by installedCollections()
    **/
   explicit KColorCollection(const QString &name=QString());

   /**
    * KColorCollection copy constructor.
    **/
   KColorCollection(const KColorCollection &);

   /**
    * KColorCollection destructor.
    **/
   ~KColorCollection();
   
   /**
    * KColorCollection assignment operator
    **/
   KColorCollection& operator=( const KColorCollection &);

   /**
    * Save the collection
    *
    * @return 'true' if successful
    **/
   bool save();

   /**
    * Get the description of the collection.
    * @return the description of the collection.
    **/
   QString description() const;

   /**   	
    * Set the description of the collection.
    * @param desc the new description
    **/
   void setDescription(const QString &desc);

   /**
    * Get the name of the collection.
    * @return the name of the collection
    **/
   QString name() const;

   /**
    * Set the name of the collection.
    * @param name the name of the collection
    **/
   void setName(const QString &name);

   /**
    * Used to specify whether a collection may be edited.
    * @see editable()
    * @see setEditable()
    */
   enum Editable { Yes, ///< Collection may be edited
                  No,  ///< Collection may not be edited
		   Ask  ///< Ask user before editing
   };
  
   /**
    * Returns whether the collection may be edited.
    * @return the state of the collection
    **/
   Editable editable() const;

   /**
    * Change whether the collection may be edited.
    * @param editable the state of the collection
    **/
   void setEditable(Editable editable);

   /**
    * Return the number of colors in the collection.
    * @return the number of colors
    **/
   int count() const;

   /**
    * Find color by index.
    * @param index the index of the desired color
    * @return The @p index -th color of the collection, null if not found.
    **/
   QColor color(int index) const;
   
   /**
    * Find index by @p color.
    * @param color the color to find
    * @return The index of the color in the collection or -1 if the
    * color is not found.
    **/
   int findColor(const QColor &color) const;

   /**
    * Find color name by @p index.
    * @param index the index of the color
    * @return The name of the @p index -th color.
    * Note that not all collections have named the colors. Null is
    * returned if the color does not exist or has no name.
    **/
   QString name(int index) const;
   
   /**
    * Find color name by @p color.
    * @return The name of color according to this collection.
    * Note that not all collections have named the colors.
    * Note also that each collection can give the same color
    * a different name.
    **/
   QString name(const QColor &color) const;

   /**
    * Add a color.
    * @param newColor The color to add.
    * @param newColorName The name of the color, null to remove 
    *                     the name.
    * @return The index of the added color.
    **/
   int addColor(const QColor &newColor, 
                const QString &newColorName = QString());

   /**
    * Change a color.
    * @param index Index of the color to change
    * @param newColor The new color.
    * @param newColorName The new color name, null to remove 
    *                     the name.
    * @return The index of the new color or -1 if the color couldn't
    * be changed.
    **/
   int changeColor(int index, 
                   const QColor &newColor, 
                   const QString &newColorName = QString());
 
   /**
    * Change a color.
    * @param oldColor The original color
    * @param newColor The new color.
    * @param newColorName The new color name, null to remove 
    *                     the name.
    * @return The index of the new color or -1 if the color couldn't
    * be changed.
    **/
   int changeColor(const QColor &oldColor, 
                   const QColor &newColor, 
                   const QString &newColorName = QString());

private:
   class KColorCollectionPrivate *d;
};


#endif // KDELIBS_KCOLORCOLLECTION_H

