/***************************************************************************
         VolumeDialog.h  -  dialog for the "volume" plugin
                             -------------------
    begin                : Sun Oct 27 2002
    copyright            : (C) 2001 by Thomas Eschenbacher
    email                : Thomas.Eschenbacher@gmx.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef VOLUME_DIALOG_H
#define VOLUME_DIALOG_H

#include "config.h"

#include <QDialog>
#include <QObject>
#include <QString>

#include "ui_VolumeDlg.h"

class QStringList;

namespace Kwave
{

    class OverViewCache;

    class VolumeDialog: public QDialog,
                        public Ui::VolumeDlg
    {
        Q_OBJECT
    public:

        /** Constructor */
        VolumeDialog(QWidget *parent, Kwave::OverViewCache *overview_cache);

        /** Destructor */
        virtual ~VolumeDialog();

        /** Returns the parameters as string list */
        QStringList params();

        /** Sets the from a list of parameters */
        void setParams(QStringList &params);

    protected slots:

        /** called when the mode radio buttons changed */
        void modeChanged(bool);

        /** called when the slider's position has changed */
        void sliderChanged(int pos);

        /** called when the spinbox value has changed */
        void spinboxChanged(int pos);

    private slots:

        /** invoke the online help */
        void invokeHelp();

    protected:

        /**
         * Mode for amplification selection
         * by factor (x1, x2, x5,...), by percentage or by decibel
         */
        typedef enum {
            MODE_FACTOR  = 0,
            MODE_PERCENT = 1,
            MODE_DECIBEL = 2
        } Mode;

        /** Sets a new volume selection mode */
        void setMode(Mode mode);

        /** Update the slider position and the spinbox value */
        void updateDisplay(double value);

    private:

        /** amplification factor */
        double m_factor;

        /**
        * current mode for amplification selection
        */
        Mode m_mode;

        /** if false, ignore the signals of slider and spinbox */
        bool m_enable_updates;

        /** overview cache for calculating the preview image */
        Kwave::OverViewCache *m_overview_cache;

    };
}

#endif /* VOLUME_DIALOG_H */

//***************************************************************************
//***************************************************************************
