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/************************************************************************
*
* Copyright (C) 2023-2024 IRCAD France
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "module/ui/qt/image/transfer_function_opacity.hpp"
#include <ui/qt/container/widget.hpp>
#include <QHBoxLayout>
#include <QSlider>
namespace sight::module::ui::qt::image
{
//------------------------------------------------------------------------------
void transfer_function_opacity::configuring()
{
this->initialize();
const config_t config = this->get_config();
if(auto piece = config.get_optional<std::size_t>("config.<xmlattr>.piece"); piece.has_value())
{
m_piece = piece.value();
}
}
//------------------------------------------------------------------------------
void transfer_function_opacity::starting()
{
this->create();
auto qt_container = std::dynamic_pointer_cast<sight::ui::qt::container::widget>(this->get_container());
auto* layout = new QHBoxLayout();
layout->setContentsMargins(0, 0, 0, 0);
m_slider = new QSlider(Qt::Horizontal);
m_slider->setRange(1, 100);
layout->addWidget(m_slider, 0);
QObject::connect(m_slider, &QSlider::valueChanged, this, &transfer_function_opacity::change_opacity);
qt_container->set_layout(layout);
this->updating();
}
//------------------------------------------------------------------------------
void transfer_function_opacity::updating()
{
const auto tf = m_tf.const_lock();
const auto& pieces = tf->pieces();
double min = 1.0;
double max = 0.0;
const auto get_min_max_fn =
[&min, &max](auto& _p)
{
std::ranges::for_each(
*_p,
[&min, &max](auto& _v)
{
min = _v.second.a > 0. ? std::min(_v.second.a, min) : min;
max = std::max(_v.second.a, max);
});
};
if(!m_piece.has_value())
{
std::ranges::for_each(pieces, get_min_max_fn);
}
else
{
get_min_max_fn(pieces[m_piece.value()]);
}
const double window = (1 - min) * 2 + max;
m_previous_value = static_cast<int>(max / window * 100);
m_slider->blockSignals(true);
m_slider->setValue(m_previous_value);
m_slider->blockSignals(false);
}
//------------------------------------------------------------------------------
void transfer_function_opacity::stopping()
{
QObject::disconnect(m_slider, &QSlider::valueChanged, this, &transfer_function_opacity::change_opacity);
this->destroy();
}
//------------------------------------------------------------------------------
void transfer_function_opacity::change_opacity(int _value)
{
const auto tf = m_tf.lock();
const auto& pieces = tf->pieces();
const auto old_value = static_cast<double>(m_previous_value);
const auto update_opacity_fn =
[factor = _value / old_value](auto& _p)
{
std::ranges::for_each(
*_p,
[factor](auto& _v)
{
_v.second.a *= factor;
});
};
if(!m_piece.has_value())
{
std::ranges::for_each(pieces, update_opacity_fn);
}
else
{
update_opacity_fn(pieces[m_piece.value()]);
}
m_previous_value = _value;
auto sig = tf->signal<data::object::modified_signal_t>(data::transfer_function::POINTS_MODIFIED_SIG);
{
const core::com::connection::blocker block(sig->get_connection(slot(service::slots::UPDATE)));
sig->async_emit();
}
}
//------------------------------------------------------------------------------
service::connections_t transfer_function_opacity::auto_connections() const
{
return {
{TF, data::transfer_function::MODIFIED_SIG, service::slots::UPDATE},
{TF, data::transfer_function::POINTS_MODIFIED_SIG, service::slots::UPDATE},
{TF, data::transfer_function::WINDOWING_MODIFIED_SIG, service::slots::UPDATE}
};
}
//------------------------------------------------------------------------------
} // namespace sight::module::ui::qt::image
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