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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 <QGridLayout>
#include <QLabel>
#include <QSlider>
#include <QFontMetrics>
#include "channel.h"
#include "minimalstreamwidget.h"
constexpr int SLIDER_SNAP = 2;
static inline int paVolume2Percent(pa_volume_t vol)
{
if (vol > PA_VOLUME_UI_MAX)
vol = PA_VOLUME_UI_MAX;
return qRound(static_cast<double>(vol - PA_VOLUME_MUTED) / PA_VOLUME_NORM * 100);
}
static inline pa_volume_t percent2PaVolume(int percent)
{
return PA_VOLUME_MUTED + qRound(static_cast<double>(percent) / 100 * PA_VOLUME_NORM);
}
/*** ChannelWidget ***/
Channel::Channel(QGridLayout* parent) :
QObject(parent),
can_decibel(false),
volumeScaleEnabled(true),
last(false)
{
channelLabel = new QLabel(nullptr);
volumeScale = new QSlider(Qt::Horizontal, nullptr);
volumeLabel = new QLabel(nullptr);
const int row = parent->rowCount();
parent->addWidget(channelLabel, row, 0);
parent->addWidget(volumeScale, row, 1);
parent->addWidget(volumeLabel, row, 2);
// make the info font smaller
QFont label_font = volumeLabel->font();
if (label_font.pixelSize() == -1)
label_font.setPointSizeF(label_font.pointSizeF() * 0.8);
else
label_font.setPixelSize(qRound(static_cast<double>(label_font.pixelSize()) * 0.8));
volumeLabel->setFont(label_font);
volumeLabel->setFixedWidth(QFontMetrics{volumeLabel->font()}.size(Qt::TextSingleLine, QStringLiteral("100%(-99.99dB)")).width());
volumeLabel->setAlignment(Qt::AlignHCenter);
volumeLabel->setTextFormat(Qt::RichText);
volumeScale->setRange(paVolume2Percent(PA_VOLUME_MUTED), paVolume2Percent(PA_VOLUME_UI_MAX));
volumeScale->setValue(paVolume2Percent(PA_VOLUME_NORM));
volumeScale->setPageStep(5);
volumeScale->setTickInterval(paVolume2Percent(PA_VOLUME_NORM));
volumeScale->setTickPosition(QSlider::TicksBelow);
volumeScale->setTracking(false);
setBaseVolume(PA_VOLUME_NORM);
connect(volumeScale, &QSlider::valueChanged, this, &Channel::onVolumeScaleValueChanged);
connect(volumeScale, &QSlider::sliderMoved, this, &Channel::onVolumeScaleSliderMoved);
}
void Channel::setVolume(pa_volume_t volume) {
const int v = paVolume2Percent(volume);
if (can_decibel) {
const double dB = pa_sw_volume_to_dB(volume);
volumeLabel->setText(tr("%1% (%2dB)", "volume slider label [X% (YdB)]").arg(v)
.arg(dB > PA_DECIBEL_MININFTY ? QString::asprintf("%0.2f", dB) : QStringLiteral("-∞")));
}
else
volumeLabel->setText(tr("%1%", "volume slider label [X%]").arg(v));
volumeScaleEnabled = false;
volumeScale->setValue(v);
volumeScaleEnabled = true;
}
void Channel::setVisible(bool visible)
{
channelLabel->setVisible(visible);
volumeScale->setVisible(visible);
volumeLabel->setVisible(visible);
}
void Channel::setEnabled(bool enabled)
{
channelLabel->setEnabled(enabled);
volumeScale->setEnabled(enabled);
volumeLabel->setEnabled(enabled);
}
void Channel::onVolumeScaleValueChanged(int value) {
if (!volumeScaleEnabled)
return;
if (minimalStreamWidget->updating)
return;
minimalStreamWidget->updateChannelVolume(channel, percent2PaVolume(value));
}
void Channel::onVolumeScaleSliderMoved(int value)
{
if (!volumeScaleEnabled)
return;
if (minimalStreamWidget->updating)
return;
const int current_value = volumeScale->value();
if (current_value == 100 && qAbs(value - current_value) <= SLIDER_SNAP)
{
volumeScale->blockSignals(true);
volumeScale->setSliderPosition(current_value);
volumeScale->blockSignals(false);
return;
}
volumeScale->setValue(value);
}
/*
void Channel::set_sensitive(bool enabled) {
setEnabled(enabled);
channelLabel->setEnabled(enabled);
volumeLabel->setEnabled(enabled);
volumeScale->setEnabled(enabled);
}
*/
void Channel::setBaseVolume(pa_volume_t /*v*/) {
#if 0 // FIXME: Qt does not support this functionality
gtk_scale_clear_marks(GTK_SCALE(volumeScale->gobj()));
gtk_scale_add_mark(GTK_SCALE(volumeScale->gobj()), (double)PA_VOLUME_MUTED, (GtkPositionType) GTK_POS_BOTTOM,
last ? (can_decibel ? tr("<small>Silence</small>").toUtf8().constData() : tr("<small>Min</small>").toUtf8().constData()) : NULL);
gtk_scale_add_mark(GTK_SCALE(volumeScale->gobj()), (double)PA_VOLUME_NORM, (GtkPositionType) GTK_POS_BOTTOM,
last ? tr("<small>100% (0dB)</small>").toUtf8().constData() : NULL);
if (v > PA_VOLUME_MUTED && v < PA_VOLUME_NORM) {
gtk_scale_add_mark(GTK_SCALE(volumeScale->gobj()), (double)v, (GtkPositionType) GTK_POS_BOTTOM,
last ? tr("<small><i>Base</i></small>").toUtf8().constData() : NULL);
}
#endif
}
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