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/************************************************************************
*
* Copyright (C) 2023 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 "collapsible_section.hpp"
#include "core/spy_log.hpp"
#include <QPropertyAnimation>
namespace sight::ui::qt::widget
{
collapsible_section::collapsible_section(const QString& _title, const int _animation_duration, QWidget* _parent) :
QWidget(_parent),
m_animation_duration(_animation_duration)
{
m_toggle_button->setStyleSheet("QToolButton {border: none;}");
m_toggle_button->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
m_toggle_button->setArrowType(Qt::ArrowType::RightArrow);
m_toggle_button->setText(_title);
m_toggle_button->setCheckable(true);
m_toggle_button->setChecked(false);
m_header_line->setFrameShape(QFrame::HLine);
m_header_line->setFrameShadow(QFrame::Sunken);
m_header_line->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
m_content_area->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
// Start out collapsed.
m_content_area->setMaximumHeight(0);
m_content_area->setMinimumHeight(0);
// Let the entire widget grow and shrink with its content.
m_toggle_animation->addAnimation(new QPropertyAnimation(this, "maximumHeight"));
m_toggle_animation->addAnimation(new QPropertyAnimation(this, "minimumHeight"));
m_toggle_animation->addAnimation(new QPropertyAnimation(m_content_area, "maximumHeight"));
m_main_layout->setVerticalSpacing(0);
m_main_layout->setContentsMargins(0, 0, 0, 0);
int row = 0;
m_main_layout->addWidget(m_toggle_button, row, 0, 1, 1, Qt::AlignLeft);
m_main_layout->addWidget(m_header_line, row++, 2, 1, 1);
m_main_layout->addWidget(m_content_area, row, 0, 1, 3);
setLayout(m_main_layout);
connect(m_toggle_button, &QToolButton::toggled, this, &collapsible_section::toggle);
}
//------------------------------------------------------------------------------
void collapsible_section::toggle(bool _expanded)
{
m_toggle_button->setArrowType(_expanded ? Qt::ArrowType::DownArrow : Qt::ArrowType::RightArrow);
m_toggle_animation->setDirection(_expanded ? QAbstractAnimation::Forward : QAbstractAnimation::Backward);
m_toggle_animation->start();
this->m_is_expanded = _expanded;
}
//------------------------------------------------------------------------------
void collapsible_section::set_content_layout(QLayout* _content_layout)
{
if(m_content_area->layout() != nullptr)
{
clean_layout_recursively(m_content_area->layout());
}
m_content_area->setLayout(_content_layout);
m_collapsed_height = sizeHint().height() - m_content_area->maximumHeight();
update_heights(false);
}
//------------------------------------------------------------------------------
void collapsible_section::set_title(QString _title)
{
m_toggle_button->setText(_title);
}
//------------------------------------------------------------------------------
void collapsible_section::update_heights(bool _changing_content_while_unfolded)
{
int content_height = m_content_area->layout()->sizeHint().height();
for(int i = 0 ; i < m_toggle_animation->animationCount() - 1 ; ++i)
{
auto* section_animation = static_cast<QPropertyAnimation*>(m_toggle_animation->animationAt(i));
section_animation->setDuration(m_animation_duration);
section_animation->setStartValue(m_collapsed_height);
section_animation->setEndValue(m_collapsed_height + content_height);
}
auto* content_animation =
static_cast<QPropertyAnimation*>(m_toggle_animation->animationAt(m_toggle_animation->animationCount() - 1));
content_animation->setDuration(m_animation_duration);
content_animation->setStartValue(0);
content_animation->setEndValue(content_height);
m_toggle_animation->setDirection(m_is_expanded ? QAbstractAnimation::Forward : QAbstractAnimation::Backward);
if(_changing_content_while_unfolded)
{
m_toggle_animation->start();
}
}
//------------------------------------------------------------------------------
void collapsible_section::clean_layout_recursively(QLayout* _layout)
{
while(QLayoutItem* const item = _layout->takeAt(0))
{
if(QWidget* const child_widget = item->widget(); child_widget != nullptr)
{
child_widget->deleteLater();
}
if(QLayout* const child_layout = item->layout(); child_layout != nullptr)
{
clean_layout_recursively(child_layout);
child_layout->deleteLater();
}
delete item;
}
}
} // namespace sight::ui::qt::widget
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