Method sortCustom

src/frontend/spreadsheet/SpreadsheetView.cpp:3567–3605

! * custom sort of all or selected columns in the spreadsheet together by allowing * to specify the "sort by"-column(s) in the SortDialog. */

 * to specify the "sort by"-column(s) in the SortDialog.
 */
void SpreadsheetView::sortCustom() {
	const auto& cols = selectedColumns();
	QVector<Column*> columnsToSort;
	Column* leadingColumn{nullptr};

	bool sortAll{true};
	if (cols.size() == 0)
		// no columns selected, the function is being called from the spreadsheet context menu,
		// sort all columns
		columnsToSort = m_spreadsheet->children<Column>();
	else if (cols.size() == 1) {
		// one single column selected, sort the whole spreadsheet (all columns)
		// with the current selected column being the leading column
		columnsToSort = m_spreadsheet->children<Column>();
		leadingColumn = cols.constFirst();
	} else {
		columnsToSort = cols;
		sortAll = (cols.size() == m_spreadsheet->columnCount());
	}

	// don't do any sort if there are no values yet in the columns
	if (!hasValues(columnsToSort))
		return;

	for (auto* col : columnsToSort)
		col->setSuppressDataChangedSignal(true);

	auto* dlg = new SortDialog(this, sortAll);
	connect(dlg, &SortDialog::sort, m_spreadsheet, &Spreadsheet::sortColumns);
	dlg->setColumns(columnsToSort, leadingColumn);

	int rc = dlg->exec();

	for (auto* col : columnsToSort) {
		col->setSuppressDataChangedSignal(false);
		if (rc == QDialog::Accepted)
			col->setChanged();
	}
}

bool SpreadsheetView::hasValues(const QVector<Column*> cols) {
	bool hasValues = false;