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#include "volumefader.h"
#include <QSlider>
#include <QVBoxLayout>
#include <math.h>
#define SCALAR 10
VolumeFader::VolumeFader()
{
volslider = new QSlider();
volslider->setRange(-60 * SCALAR , 10 * SCALAR);
connect(volslider, SIGNAL(valueChanged(int)), this, SLOT(handleValueChanged()));
QVBoxLayout* lo = new QVBoxLayout();
lo->addWidget(volslider);
setLayout(lo);
setVolumeDb(10);
setVolumePower(10);
}
VolumeFader::~VolumeFader()
{
}
void VolumeFader::updatePeakDb(double)
{
}
void VolumeFader::updatePeakPower(double)
{
}
void VolumeFader::setVolumeDb(double db)
{
volslider->setValue(db*SCALAR);
}
void VolumeFader::setVolumePower(double power)
{
double db = 10 * log10(power);
setVolumeDb(db);
}
void VolumeFader::handleValueChanged()
{
double db = ((double)volslider->value())/((double)SCALAR);
double power = pow(10, db/10);
emit volumeChangedDb(db);
emit volumeChangedPower(power);
}
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