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/************************************************************************
*
* Copyright (C) 2019-2025 IRCAD France
* Copyright (C) 2019 IHU Strasbourg
*
* 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 "screen_selector.hpp"
#include <core/com/signal.hxx>
#include <service/macros.hpp>
#include <QApplication>
#include <QGuiApplication>
#include <QInputDialog>
#include <QPointer>
#include <QScreen>
namespace sight::module::ui::viz
{
static const core::com::signals::key_t SCREEN_SELECTED_SIG = "screen_selected";
//------------------------------------------------------------------------------
screen_selector::screen_selector() :
m_screen_selected_sig(new_signal<screen_selected_signal_t>(SCREEN_SELECTED_SIG))
{
}
//------------------------------------------------------------------------------
screen_selector::~screen_selector()
= default;
//------------------------------------------------------------------------------
void screen_selector::configuring()
{
this->initialize();
const auto config_tree = this->get_config();
m_mode = config_tree.get("config.<xmlattr>.mode", m_mode);
SIGHT_ERROR_IF(
"Unknown selection mode '" + m_mode + "'.",
m_mode != "current" && m_mode != "neighbor" && m_mode != "select"
);
}
//------------------------------------------------------------------------------
void screen_selector::starting()
{
this->action_service_starting();
}
//------------------------------------------------------------------------------
void screen_selector::updating()
{
int screen_num = -1;
if(m_mode == "select")
{
screen_num = sight::module::ui::viz::screen_selector::select_screen();
}
else
{
const auto& screens = QGuiApplication::screens();
if(const auto* const active_window = qApp->activeWindow(); active_window)
{
if(const auto* const window_screen =
QGuiApplication::screenAt(active_window->mapToGlobal(active_window->rect().center())); window_screen)
{
screen_num = int(screens.indexOf(window_screen));
if(m_mode == "neighbor")
{
++screen_num;
}
}
}
if(screen_num >= screens.count())
{
screen_num = int(screens.indexOf(QGuiApplication::primaryScreen()));
}
}
if(screen_num >= 0)
{
m_screen_selected_sig->async_emit(screen_num);
}
}
//------------------------------------------------------------------------------
void screen_selector::stopping()
{
this->action_service_stopping();
}
//------------------------------------------------------------------------------
int screen_selector::select_screen()
{
QStringList screen_names;
int screen_number = 0;
if(QGuiApplication::screens().size() <= 1)
{
return 0;
}
for(QScreen* screen : QGuiApplication::screens())
{
const QString number_str = QString::number(screen_number++) + ".";
// Compute the screen's diagonal length in inches.
constexpr qreal inches_per_millimeter = 0.03937008;
const auto screen_size = screen->physicalSize();
const qreal diagonal_length_mm = std::sqrt(
screen_size.width() * screen_size.width()
+ screen_size.height() * screen_size.height()
);
const qreal diagonal_length_inches = diagonal_length_mm * inches_per_millimeter;
const QString diagonal = QString::number(diagonal_length_inches, 'f', 1) + "\"";
const auto geom = screen->geometry();
const QString resolution = "[" + QString::number(geom.width()) + "x" + QString::number(geom.height()) + "]";
QString display_name = screen->manufacturer() + " " + screen->model();
if(display_name.size() == 1)
{
display_name = screen->name();
}
screen_names << number_str + " " + diagonal + " " + resolution + " " + display_name;
}
bool ok_clicked = false;
QString selected_item = QInputDialog::getItem(
nullptr,
"Select a screen.",
"Screen:",
screen_names,
0,
false,
&ok_clicked
);
std::int64_t ret_screen = -1;
if(ok_clicked)
{
auto name_it = std::find(screen_names.cbegin(), screen_names.cend(), selected_item);
if(name_it != screen_names.cend())
{
ret_screen = std::distance(screen_names.cbegin(), name_it);
}
}
return static_cast<int>(ret_screen);
}
//------------------------------------------------------------------------------
} // namespace sight::module::ui::viz
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