Method updateHeader

src/backend/matrix/MatrixModel.cpp:217–220

}

void MatrixModel::updateHeader() {
	Q_EMIT headerDataChanged(Qt::Horizontal, 0, m_matrix->columnCount());
	Q_EMIT headerDataChanged(Qt::Vertical, 0, m_matrix->rowCount());
}

void MatrixModel::handleColumnsAboutToBeInserted(int before, int count) {
	beginInsertColumns(QModelIndex(), before, before + count - 1);