Method TreeViewComboBox

src/frontend/widgets/TreeViewComboBox.cpp:33–65

! \class TreeViewComboBox \brief Provides a QTreeView in a QComboBox. \ingroup backend/widgets */

	\ingroup backend/widgets
*/
TreeViewComboBox::TreeViewComboBox(QWidget* parent)
	: QComboBox(parent)
	, m_treeView(new QTreeView)
	, m_groupBox(new QGroupBox)
	, m_lineEdit(new QLineEdit) {
	auto* layout = new QVBoxLayout(this);
	layout->setContentsMargins(0, 0, 0, 0);
	layout->setSpacing(0);

	layout->addWidget(m_lineEdit);
	layout->addWidget(m_treeView);

	m_groupBox->setLayout(layout);
	m_groupBox->setParent(parent, Qt::Popup);
	m_groupBox->hide();
	m_groupBox->installEventFilter(this);

	m_treeView->header()->hide();
	m_treeView->setSelectionMode(QAbstractItemView::SingleSelection);
	m_treeView->setUniformRowHeights(true);

	m_lineEdit->setPlaceholderText(i18n("Search/Filter text"));
	m_lineEdit->setClearButtonEnabled(true);
	m_lineEdit->setFocus();

	addItem(QString());
	setCurrentIndex(0);
	setEditText(m_currentText);

	// signal activated() is platform dependent
	connect(m_treeView, &QTreeView::pressed, this, &TreeViewComboBox::treeViewIndexActivated);
	connect(m_lineEdit, &QLineEdit::textChanged, this, &TreeViewComboBox::filterChanged);
}

void TreeViewComboBox::setTopLevelClasses(const QList<AspectType>& list) {
	m_topLevelClasses = list;