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-rw-r--r--dgedit/volumefader.cc97
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diff --git a/dgedit/volumefader.cc b/dgedit/volumefader.cc
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-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/***************************************************************************
- * volumefader.cc
- *
- * Tue Apr 15 15:46:00 CEST 2014
- * Copyright 2014 Jonas Suhr Christensen
- * jsc@umbraculum.org
- ****************************************************************************/
-
-/*
- * This file is part of DrumGizmo.
- *
- * DrumGizmo 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.
- *
- * DrumGizmo 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 DrumGizmo; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-#include "volumefader.h"
-
-#include <QSlider>
-#include <QVBoxLayout>
-
-#include <math.h>
-
-#define SCALAR 10
-#define P 0.5
-
-VolumeFader::VolumeFader()
-{
- peak = 0;
- volslider = new QSlider();
- volslider->setRange(-60 * SCALAR , 10 * SCALAR);
- volslider->setOrientation(Qt::Horizontal);
-
- volumepeak = new QLabel();
-
- volume = new QLabel();
-
- connect(volslider, SIGNAL(valueChanged(int)), this, SLOT(handleValueChanged()));
-
- QVBoxLayout* lo = new QVBoxLayout();
- lo->addWidget(volslider);
-
- lo->addWidget(volumepeak);
- lo->addWidget(volume);
-
- setLayout(lo);
-}
-
-VolumeFader::~VolumeFader()
-{
-
-}
-
-void VolumeFader::updatePeakDb(double db)
-{
-// updatePeakPower(pow(10, db/20));
-}
-
-void VolumeFader::updatePeakPower(double newpeak)
-{
- peak = (newpeak * (1.0-P) + peak * P);
- volumepeak->setText("Peak " + QString::number(peak, 'f', 5));
- handleValueChanged();
-}
-
-void VolumeFader::setVolumeDb(double db)
-{
- volslider->setValue(db*SCALAR);
- handleValueChanged();
-}
-
-void VolumeFader::setVolumePower(double power)
-{
- double db = 20 * log10(power);
- setVolumeDb(db);
- handleValueChanged();
-}
-
-void VolumeFader::handleValueChanged()
-{
- double db = ((double)volslider->value())/((double)SCALAR);
- double power = pow(10, db/20);
- emit volumeChangedDb(db);
- emit volumeChangedPower(power);
-
- volume->setText("Gain " + QString::number(volslider->value()/SCALAR) + " dB");
-}