/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2005-02-26
 * Description : image channels mixer.
 *
 * Copyright (C) 2005-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 * 
 * 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.
 * 
 * ============================================================ */

#ifndef CHANNELMIXER_H
#define CHANNELMIXER_H

// Digikam includes.

#include "imagedlgbase.h"

class TQCheckBox;
class TQComboBox;
class TQPushButton;
class TQHButtonGroup;

class KDoubleNumInput;

namespace Digikam
{   
class HistogramWidget;
class ColorGradientWidget;
class ImageWidget;
class DColor;
}

namespace DigikamChannelMixerImagesPlugin
{

class ChannelMixerDialog : public Digikam::ImageDlgBase
{
    TQ_OBJECT
  

public:

    ChannelMixerDialog(TQWidget *parent);
    ~ChannelMixerDialog();

private:

    void readUserSettings();
    void writeUserSettings();
    void resetValues();
    void finalRendering();
    void adjustSliders();
    
private slots:

    void slotUser2();
    void slotUser3();
    void slotResetCurrentChannel();
    void slotEffect();
    void slotChannelChanged(int channel);
    void slotScaleChanged(int scale);
    void slotGainsChanged();
    void slotMonochromeActived(bool mono);
    void slotColorSelectedFromTarget(const Digikam::DColor &color);    

private:

    enum ColorChannelGains 
    {
        RedChannelGains=0,
        GreenChannelGains,
        BlueChannelGains
    };

    enum HistogramScale
    {
        Linear=0,
        Logarithmic
    };

private:
    
    uchar                        *m_destinationPreviewData;
 
    double                        m_redRedGain;
    double                        m_redGreenGain;
    double                        m_redBlueGain;
    double                        m_greenRedGain;
    double                        m_greenGreenGain;
    double                        m_greenBlueGain;
    double                        m_blueRedGain;
    double                        m_blueGreenGain;
    double                        m_blueBlueGain;
    double                        m_blackRedGain;
    double                        m_blackGreenGain;
    double                        m_blackBlueGain;
    
    TQComboBox                    *m_channelCB;    
    
    TQHButtonGroup                *m_scaleBG;  

    KDoubleNumInput              *m_redGain;
    KDoubleNumInput              *m_greenGain;
    KDoubleNumInput              *m_blueGain;
    
    TQPushButton                  *m_resetButton;
    
    TQCheckBox                    *m_preserveLuminosity;
    TQCheckBox                    *m_monochrome;
    
    Digikam::ColorGradientWidget *m_hGradient;
    
    Digikam::HistogramWidget     *m_histogramWidget;
    
    Digikam::ImageWidget         *m_previewWidget;
};

}  // NameSpace DigikamChannelMixerImagesPlugin

#endif /* CHANNELMIXER_H */