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/*
Elypson/qt-collapsible-section
(c) 2016 Michael A. Voelkel - michael.alexander.voelkel@gmail.com
This file is part of Elypson/qt-collapsible section.
Elypson/qt-collapsible-section 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.
Elypson/qt-collapsible-section 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 General Public License
along with Elypson/qt-collapsible-section. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QPropertyAnimation>
#include "Section.h"
Section::Section(const QString & title, const int animationDuration, QWidget* parent)
: QWidget(parent), animationDuration(animationDuration)
{
toggleButton = new QToolButton(this);
headerLine = new QFrame(this);
toggleAnimation = new QParallelAnimationGroup(this);
contentArea = new QScrollArea(this);
mainLayout = new QGridLayout(this);
toggleButton->setStyleSheet("QToolButton {border: none;}");
toggleButton->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
toggleButton->setArrowType(Qt::ArrowType::RightArrow);
toggleButton->setText(title);
toggleButton->setCheckable(true);
toggleButton->setChecked(false);
headerLine->setFrameShape(QFrame::HLine);
headerLine->setFrameShadow(QFrame::Sunken);
headerLine->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
contentArea->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
// start out collapsed
contentArea->setMaximumHeight(0);
contentArea->setMinimumHeight(0);
// let the entire widget grow and shrink with its content
toggleAnimation->addAnimation(new QPropertyAnimation(this, "minimumHeight"));
toggleAnimation->addAnimation(new QPropertyAnimation(this, "maximumHeight"));
toggleAnimation->addAnimation(new QPropertyAnimation(contentArea, "maximumHeight"));
mainLayout->setVerticalSpacing(0);
mainLayout->setContentsMargins(0, 0, 0, 0);
int row = 0;
mainLayout->addWidget(toggleButton, row, 0, 1, 1, Qt::AlignLeft);
mainLayout->addWidget(headerLine, row++, 2, 1, 1);
mainLayout->addWidget(contentArea, row, 0, 1, 3);
setLayout(mainLayout);
connect(toggleButton, &QToolButton::toggled, this, &Section::toggle);
}
void Section::toggle(bool collapsed) {
toggleButton->setArrowType(collapsed ? Qt::ArrowType::DownArrow : Qt::ArrowType::RightArrow);
toggleAnimation->setDirection(collapsed ? QAbstractAnimation::Forward : QAbstractAnimation::Backward);
toggleAnimation->start();
}
void Section::setContentLayout(QLayout & contentLayout)
{
delete contentArea->layout();
contentArea->setLayout(&contentLayout);
const auto collapsedHeight = sizeHint().height() - contentArea->maximumHeight();
auto contentHeight = contentLayout.sizeHint().height();
for (int i = 0; i < toggleAnimation->animationCount() - 1; ++i)
{
QPropertyAnimation* SectionAnimation = static_cast<QPropertyAnimation *>(toggleAnimation->animationAt(i));
SectionAnimation->setDuration(animationDuration);
SectionAnimation->setStartValue(collapsedHeight);
SectionAnimation->setEndValue(collapsedHeight + contentHeight);
}
QPropertyAnimation* contentAnimation = static_cast<QPropertyAnimation *>(toggleAnimation->animationAt(toggleAnimation->animationCount() - 1));
contentAnimation->setDuration(animationDuration);
contentAnimation->setStartValue(0);
contentAnimation->setEndValue(contentHeight);
}
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