EqFader.h

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/* eqfader.h - defination of EqFader class.
*
* Copyright (c) 2014 David French <dave/dot/french3/at/googlemail/dot/com>
*
* This file is part of LMMS - https://lmms.io
*
* 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.
*
* 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 COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
 
#ifndef EQFADER_H
#define EQFADER_H
#include <QList>
#include <QWidget>
 
#include "EffectControls.h"
#include "Fader.h"
#include "GuiApplication.h"
#include "MainWindow.h"
#include "TextFloat.h"
 
namespace lmms::gui
{
 
 
class EqFader : public Fader
{
 
public:
    Q_OBJECT
public:
    EqFader( FloatModel * model, const QString & name, QWidget * parent,  float* lPeak, float* rPeak ) :
        Fader(model, name, parent, false)
    {
        setMinimumSize( 23, 116 );
        setMaximumSize( 23, 116 );
        resize( 23, 116 );
        m_lPeak = lPeak;
        m_rPeak = rPeak;
        connect( getGUI()->mainWindow(), SIGNAL( periodicUpdate() ), this, SLOT( updateVuMeters() ) );
        m_model = model;
        setPeak_L( 0 );
        setPeak_R( 0 );
    }
 
 
 
    ~EqFader() override = default;
 
 
private slots:
 
    void updateVuMeters()
    {
        const float opl = getPeak_L();
        const float opr = getPeak_R();
        const float fallOff = 1.07f;
        if( *m_lPeak > opl )
        {
            setPeak_L( *m_lPeak );
            *m_lPeak = 0;
        }
        else
        {
            setPeak_L( opl/fallOff );
        }
 
        if( *m_rPeak > opr )
        {
            setPeak_R( *m_rPeak );
            *m_rPeak = 0;
        }
        else
        {
            setPeak_R( opr/fallOff );
        }
        update();
    }
 
 
 
 
private:
    float* m_lPeak;
    float* m_rPeak;
    FloatModel* m_model;
 
};
 
 
} // namespace lmms::gui
 
#endif // EQFADER_H