Method collectionChanged

src/frontend/datasources/ImportDatasetWidget.cpp:175–224

* Shows all categories and sub-categories for the currently selected collection */

 * Shows all categories and sub-categories for the currently selected collection
 */
void ImportDatasetWidget::collectionChanged(int index) {
	m_allCollections = (index == 0);

	if (!m_allCollections)
		m_collection = ui.cbCollections->itemData(index).toString();
	else
		m_collection = QString();

	// update the info field
	m_collectionDescription.clear();
	if (!m_allCollections) {
		for (const QJsonValueRef col : m_collections) {
			const QJsonObject& collection = col.toObject();
			if (m_collection == collection[QLatin1String("name")].toString()) {
				m_collectionDescription = collection[QLatin1String("description")].toString();
				m_collectionDescription += QStringLiteral("<br></hline><br>");
				break;
			}
		}
	} else {
		for (const QJsonValueRef col : m_collections) {
			const QJsonObject& collection = col.toObject();
			m_collectionDescription = collection[QLatin1String("description")].toString();
			m_collectionDescription += QStringLiteral("<br>");
		}
	}
	ui.lInfo->setText(m_collectionDescription);
	updateCategories();

	// update the completer
	if (m_completer)
		delete m_completer;

	// add all categories, sub-categories and the dataset names for the current collection
	QStringList keywords;
	for (const auto& category : m_model->categories(m_collection)) {
		keywords << category;
		for (const auto& subcategory : m_model->subcategories(m_collection, category)) {
			keywords << subcategory;
			for (const QString& dataset : m_model->datasets(m_collection, category, subcategory))
				keywords << dataset;
		}
	}

	m_completer = new QCompleter(keywords, this);
	m_completer->setCompletionMode(QCompleter::PopupCompletion);
	m_completer->setCaseSensitivity(Qt::CaseInsensitive);
	m_completer->setFilterMode(Qt::MatchContains);
	ui.leSearch->setCompleter(m_completer);
}

void ImportDatasetWidget::updateCategories() {
	m_initializing = true;