/***************************************************************************
     PitchShiftDialog.h  -  dialog for the "pitch_shift" plugin
                             -------------------
    begin                : Sun Mar 23 2003
    copyright            : (C) 2003 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 PITCH_SHIFT_DIALOG_H
#define PITCH_SHIFT_DIALOG_H

#include "config.h"

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

#include "libkwave/PluginSetupDialog.h"
#include "ui_PitchShiftDlg.h"

class QStringList;

namespace Kwave
{

    class PitchShiftDialog: public QDialog,
                            public Ui::PitchShiftDlg,
                            public Kwave::PluginSetupDialog
    {
	Q_OBJECT
    public:

	/** Constructor */
	explicit PitchShiftDialog(QWidget *parent);

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

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

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

	/** retruns a pointer to this as a QDialog */
	virtual QDialog *dialog() { return this; }

    signals:

	/**
	 * Emitted whenever the speed or the frequency changes
	 * @param speed the speed factor, floating point
	 * @param freq the frequency parameter in Hz
	 */
	void changed(double speed, double freq);

	/** Pre-listen mode has been started */
	void startPreListen();

	/** Pre-listen mode has been stopped */
	void stopPreListen();

    protected slots:

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

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

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

	/** called if the frequency sbinbox value has changed */
	void frequencyChanged(int pos);

	/**
	 * called when the "Listen" button has been toggled,
	 * to start or stop the pre-listen mode
	 */
	void listenToggled(bool listen);

	/**
	 * called when the pre-listen mode stopped/aborted
	 */
	void listenStopped();

    private slots:

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

    protected:

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

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

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

    private:

	/** speed factor */
	double m_speed;

	/** base frequency, @see aRts documentation */
	double m_frequency;

	/** mode for selecting speed (factor or percentage) */
	Mode m_mode;

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

#endif /* PITCH_SHIFT_DIALOG_H */

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