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/***
This file is part of pavucontrol.
Copyright 2006-2008 Lennart Poettering
Copyright 2009 Colin Guthrie
pavucontrol 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.
pavucontrol 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 pavucontrol. If not, see <https://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "minimalstreamwidget.h"
#include <QGridLayout>
#include <QProgressBar>
#include <QDebug>
/*** MinimalStreamWidget ***/
MinimalStreamWidget::MinimalStreamWidget(QWidget *parent) :
QWidget(parent),
peakProgressBar(new QProgressBar(this)),
lastPeak(0),
peak(nullptr),
updating(false),
volumeMeterEnabled(false),
volumeMeterVisible(true) {
peakProgressBar->setTextVisible(false);
peakProgressBar->setMaximumHeight(4 /* FIXME: hardcoded */);
peakProgressBar->hide();
}
void MinimalStreamWidget::initPeakProgressBar(QGridLayout* channelsGrid) {
channelsGrid->addWidget(peakProgressBar, channelsGrid->rowCount(), 0, 1, -1);
}
#define DECAY_STEP .04
void MinimalStreamWidget::updatePeak(double v) {
if (lastPeak >= DECAY_STEP)
if (v < lastPeak - DECAY_STEP)
v = lastPeak - DECAY_STEP;
lastPeak = v;
if (v >= 0) {
peakProgressBar->setEnabled(TRUE);
int value = qRound(v * peakProgressBar->maximum());
peakProgressBar->setValue(value);
} else {
peakProgressBar->setEnabled(FALSE);
peakProgressBar->setValue(0);
}
enableVolumeMeter();
}
void MinimalStreamWidget::enableVolumeMeter() {
if (volumeMeterEnabled)
return;
volumeMeterEnabled = true;
if (volumeMeterVisible) {
peakProgressBar->show();
}
}
void MinimalStreamWidget::setVolumeMeterVisible(bool v) {
volumeMeterVisible = v;
if (v) {
if (volumeMeterEnabled) {
peakProgressBar->show();
}
} else {
peakProgressBar->hide();
}
}
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