File indexing completed on 2024-04-21 15:12:09

 /************************************************************************
  *                                  *
  *  This file is part of Kooka, a scanning/OCR application using    *
  *  Qt <http://www.qt.io> and KDE Frameworks <http://www.kde.org>.  *
  *                                  *
  *  Copyright (C) 2000-2016 Klaas Freitag <freitag@suse.de>     *
  *                          Jonathan Marten <jjm@keelhaul.me.uk>    *
  *                                  *
  *  Kooka 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 and appearing in the  *
  *  file COPYING included in the packaging of this file;  either    *
  *  version 2 of the License, or (at your option) any later version.    *
  *                                  *
  *  As a special exception, permission is given to link this program    *
  *  with any version of the KADMOS OCR/ICR engine (a product of     *
  *  reRecognition GmbH, Kreuzlingen), and distribute the resulting  *
  *  executable without including the source code for KADMOS in the  *
  *  source distribution.                        *
  *                                  *
  *  This program 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 General Public License for more details.            *
  *                                  *
  *  You should have received a copy of the GNU General Public       *
  *  License along with this program;  see the file COPYING.  If     *
  *  not, see <http://www.gnu.org/licenses/>.                *
  *                                  *
  ************************************************************************/
 
 #ifndef GAMMADIALOG_H
 #define GAMMADIALOG_H
 
 #include "kookascan_export.h"
 
 #include "dialogbase.h"
 
 class KScanSlider;
 class KGammaTable;
 class GammaWidget;
 
 
 /**
  * @short A dialogue to allow editing of a gamma table.
  *
  * The dialogue has three combination slider/spinboxes to set the
  * brightness, contrast and gamma of the table.  A preview of the table
  * is displayed to the right (in a @c GammaWidget).
  *
  * @author Klaas Freitag
  * @author Jonathan Marten
  **/
 
 class KOOKASCAN_EXPORT GammaDialog : public DialogBase
 {
     Q_OBJECT
 
 public:
     /**
      * Constructor.
      *
      * @param table Gamma table to take initial values from
      * @param parent Parent widget
      **/
     explicit GammaDialog(const KGammaTable *table, QWidget *parent = nullptr);
 
     /**
      * Destructor.
      **/
     virtual ~GammaDialog()          {}
 
     /**
      * Get the internal gamma table.
      *
      * This is a deep copy of the table that was originally specified to
      * the constructor.
      *
      * @return The gamma table
      **/
     const KGammaTable *gammaTable() const   { return (mTable); }
 
 protected slots:
     /**
      * Apply the currently set values via the @c gammaToApply() signal.
      **/
     void slotApply();
 
     /**
      * Reset the gamma values to the default of a linear transfer function.
      **/
     void slotReset();
 
 signals:
     /**
      * Emitted when the gamma table has been changed and one of the "OK" or
      * "Apply" buttons is clicked.
      *
      * @param table The new gamma table
      **/
     void gammaToApply(const KGammaTable *table);
 
 private:
     KGammaTable *mTable;
     GammaWidget *mGtDisplay;
 
     KScanSlider *mSetBright;
     KScanSlider *mSetContrast;
     KScanSlider *mSetGamma;
 };
 
 #endif