1 files changed, 95 insertions, 0 deletions
diff --git a/3rdparty/Section.cpp b/3rdparty/Section.cpp
new file mode 100644
index 0000000..57eed2c
--- /dev/null
+++ b/3rdparty/Section.cpp
@@ -0,0 +1,95 @@
+/*
+    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);
+}