Method reverseSelection

src/frontend/spreadsheet/SpreadsheetView.cpp:2110–2192

}

void SpreadsheetView::reverseSelection() {
	auto* selectionModel = m_tableView->selectionModel();
	const auto& indexes = selectionModel->selectedIndexes();
	if (indexes.isEmpty())
		return;

	// check if complete rows only are selected, reverse the selection for rows only in this case
	bool rowsOnly = true;
	QVector<int> selectedRows;
	for (const auto& index : indexes) {
		const int row = index.row();
		if (selectionModel->isRowSelected(row)) {
			if (selectedRows.indexOf(row) == -1)
				selectedRows << row;
		} else {
			rowsOnly = false;
			break;
		}
	}

	if (rowsOnly) {
		// clear the current selection
		m_suppressSelectionChangedEvent = true;
		selectionModel->clearSelection();

		// temporarily switch to the "multi selection" mode and select the rows, that were not selected before
		m_tableView->setSelectionMode(QAbstractItemView::MultiSelection);
		for (int row = 0; row < m_spreadsheet->rowCount(); ++row) {
			if (selectedRows.indexOf(row) == -1)
				m_tableView->selectRow(row);
		}
		m_tableView->setSelectionMode(QAbstractItemView::ExtendedSelection); // switch back to the extended selection

		m_suppressSelectionChangedEvent = false;
		selectionChanged(QItemSelection(), QItemSelection());
		return;
	}

	// check if complete columns are selected only, reverse the selection for columns only in this case
	bool columnsOnly = true;
	QVector<int> selectedColumns;
	for (const auto& index : indexes) {
		const int col = index.column();
		if (selectionModel->isColumnSelected(col)) {
			if (selectedColumns.indexOf(col) == -1)
				selectedColumns << col;
		} else {
			columnsOnly = false;
			break;
		}
	}

	if (columnsOnly) {
		// clear the current selection
		m_suppressSelectionChangedEvent = true;
		selectionModel->clearSelection();

		// temporarily switch to the "multi selection" mode and select the columns, that were not selected before