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/************************************************************************
*
* Copyright (C) 2020-2023 IRCAD France
* Copyright (C) 2020 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 "module/ui/qt/style_selector.hpp"
#include <core/com/slots.hxx>
#include <core/macros.hpp>
#include <core/runtime/path.hpp>
#include <service/macros.hpp>
#include <ui/__/preferences.hpp>
#include <QApplication>
#include <QFile>
#include <QResource>
#include <QTextStream>
#include <algorithm>
#include <filesystem>
namespace sight::module::ui::qt
{
static const core::com::slots::key_t UPDATE_FROM_PREFS_SLOT = "update_from_preferences";
//-----------------------------------------------------------------------------
style_selector::style_selector() noexcept
{
new_slot(UPDATE_FROM_PREFS_SLOT, &style_selector::update_from_prefs, this);
}
//-----------------------------------------------------------------------------
style_selector::~style_selector() noexcept =
default;
//-----------------------------------------------------------------------------
void style_selector::configuring()
{
}
//-----------------------------------------------------------------------------
void style_selector::starting()
{
m_style_map["DEFAULT"] = std::filesystem::path("");
const auto style_rc = core::runtime::get_module_resource_path("sight::module::ui::qt");
// Stores each rcc & qss
for(const auto& p : std::filesystem::directory_iterator(style_rc))
{
std::filesystem::path f = p;
if(f.extension() == ".rcc")
{
const std::string filename = f.filename().replace_extension("").string();
std::string name = filename;
std::transform(
filename.begin(),
filename.end(),
name.begin(),
[](unsigned char _c) -> unsigned char {return static_cast<unsigned char>(std::toupper(_c));});
m_style_map[name] = f.replace_extension("");
}
}
// Apply theme from preferences if any.
this->update_from_prefs();
}
//-----------------------------------------------------------------------------
void style_selector::stopping()
{
m_style_map.clear();
}
//-----------------------------------------------------------------------------
void style_selector::updating()
{
}
//-----------------------------------------------------------------------------
void style_selector::change_style(const std::string& _style_name)
{
auto path = m_style_map[_style_name];
sight::ui::preferences preferences;
// DEFAULT (no theme) case.
if(path.empty())
{
qApp->setStyleSheet("");
preferences.put("THEME", "DEFAULT");
return;
}
// Load ressources
[[maybe_unused]] const bool resource_loaded = QResource::registerResource(
path.replace_extension(
".rcc"
).string().c_str()
);
SIGHT_ASSERT("Cannot load resources '" + path.replace_extension(".rcc").string() + "'.", resource_loaded);
// Load stylesheet.
QFile data(QString::fromStdString(path.replace_extension(".qss").string()));
if(data.open(QFile::ReadOnly))
{
QTextStream style_in(&data);
const QString style = style_in.readAll();
data.close();
qApp->setStyleSheet(style);
preferences.put("THEME", _style_name);
}
}
//-----------------------------------------------------------------------------
void style_selector::update_from_prefs()
{
// Apply previously saved style in preferences file.
try
{
sight::ui::preferences preferences;
if(const auto& theme = preferences.get_optional<std::string>("THEME"); theme)
{
this->change_style(*theme);
}
}
catch(const sight::ui::preferences_disabled& /*e*/)
{
// Nothing to do..
}
}
//-----------------------------------------------------------------------------
} // namespace sight::module::ui::qt
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