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// *****************************************************************************
// recorder_slider.cpp Recorder project
// *****************************************************************************
//
// File description:
//
// Slider that can be used to adjust a recorder tweakable in target app
//
//
//
//
//
//
//
//
// *****************************************************************************
// This software is licensed under the GNU General Public License v3+
// (C) 2017-2019, Christophe de Dinechin <christophe@dinechin.org>
// *****************************************************************************
// This file is part of Recorder
//
// Recorder 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 3 of the License, or
// (at your option) any later version.
//
// Recorder 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 Recorder, in a file named COPYING.
// If not, see <https://www.gnu.org/licenses/>.
// *****************************************************************************
#include "recorder_slider.h"
#include <QtCore/QTextStream>
#include <QtWidgets/QGridLayout>
RecorderSlider::RecorderSlider(const char *filename,
recorder_chans_p &chans,
const char *specification,
QGroupBox *group,
QLabel *minLabel,
QLabel *maxLabel,
QLabel *valueLabel,
QWidget *parent)
// ----------------------------------------------------------------------------
// Define a slider according to the input spec
// ----------------------------------------------------------------------------
: QSlider(Qt::Horizontal, parent),
filename(filename),
chans(chans),
specification(specification),
sourceChanged(false),
name(specification),
min(0),
max(100),
group(group),
minLabel(minLabel),
maxLabel(maxLabel),
valueLabel(valueLabel)
{
QObject::connect(this, &QSlider::valueChanged,
this, &RecorderSlider::valueChanged);
setup(specification);
}
RecorderSlider::~RecorderSlider()
// ----------------------------------------------------------------------------
// Destructor for slider has nothing to do
// ----------------------------------------------------------------------------
{
}
QGroupBox *RecorderSlider::make(const char *filename,
recorder_chans_p &chans,
const char *spec)
// ----------------------------------------------------------------------------
// Build a control group holding the slider and associated labels
// ----------------------------------------------------------------------------
{
QGroupBox *group = new QGroupBox;
QGridLayout *layout = new QGridLayout;
QLabel *minLabel = new QLabel;
QLabel *maxLabel = new QLabel;
QLabel *valueLabel = new QLabel;
RecorderSlider *slider = new RecorderSlider(filename, chans, spec,
group,
minLabel, maxLabel,
valueLabel);
layout->addWidget(minLabel, 0, 0);
layout->addWidget(slider, 0, 1);
layout->addWidget(maxLabel, 0, 2);
layout->addWidget(valueLabel, 1, 1);
layout->setContentsMargins(0, 0, 0, 0);
valueLabel->setAlignment(Qt::AlignCenter);
group->setLayout(layout);
return group;
}
void RecorderSlider::setup(const char *specification)
// ----------------------------------------------------------------------------
// Parse the specification into name, min and max
// ----------------------------------------------------------------------------
// This accepts specifications that look like:
// name
// name=3
// name=3:-10:10
{
int value = 0;
QString spec = specification;
int eq = spec.indexOf('=');
if (eq < 0)
{
name = spec;
}
else
{
name = spec.mid(0, eq);
spec = spec.mid(eq+1);
QStringList args = spec.split(':');
switch(args.length())
{
case 3:
min = args[1].toInt();
max = args[2].toInt();
/* Falls through */
case 1:
value = args[0].toInt();
break;
default:
fprintf(stderr,
"Invalid slider specification %s\n"
" Expecting one of:\n"
" name\n"
" name=value\n"
" name=value:min:max\n"
" Example: -s slider=0:-10:10\n",
specification);
}
}
setRange(min, max);
setValue(value);
group->setTitle(name);
minLabel->setText(QString("%1").arg(min));
maxLabel->setText(QString("%1").arg(max));
}
void RecorderSlider::updateSetup()
// ----------------------------------------------------------------------------
// Nothing yet
// ----------------------------------------------------------------------------
{
}
void RecorderSlider::valueChanged(int value)
// ----------------------------------------------------------------------------
// When the value changes, send the configuration to the target
// ----------------------------------------------------------------------------
{
valueLabel->setText(QString("%1").arg(value));
QString config;
QTextStream ts(&config);
ts << name << "=" << value;
const char *constData = config.toUtf8().data();
if (!recorder_chans_configure(chans, constData))
fprintf(stderr, "Configuration %s failed\n", constData);
}
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