File indexing completed on 2024-06-16 03:42:35 

0001 /*
0002     File                 : BigInt2MonthFilter.h
0003     Project              : AbstractColumn
0004     Description          : Conversion filter bigint -> QDateTime, interpreting
0005     the input numbers as months of the year.
0006     --------------------------------------------------------------------
0007     SPDX-FileCopyrightText: 2020 Stefan Gerlach <stefan.gerlach@uni.kn>
0008     SPDX-License-Identifier: GPL-2.0-or-later
0009 */
0010 
0011 #ifndef BIGINT2MONTH_FILTER_H
0012 #define BIGINT2MONTH_FILTER_H
0013 
0014 #include "../AbstractSimpleFilter.h"
0015 #include <QDateTime>
0016 #include <cmath>
0017 
0018 //! Conversion filter bigint -> QDateTime, interpreting the input numbers as months of the year.
0019 class BigInt2MonthFilter : public AbstractSimpleFilter {
0020     Q_OBJECT
0021 
0022 public:
0023     QDate dateAt(int row) const override {
0024         return dateTimeAt(row).date();
0025     }
0026     QTime timeAt(int row) const override {
0027         return dateTimeAt(row).time();
0028     }
0029     QDateTime dateTimeAt(int row) const override {
0030         if (!m_inputs.value(0))
0031             return QDateTime();
0032         qint64 inputValue = m_inputs.value(0)->bigIntAt(row);
0033         // Don't use Julian days here since support for years < 1 is bad
0034         // Use 1900-01-01 instead
0035         QDate result_date = QDate(1900, 1, 1).addMonths(inputValue);
0036         QTime result_time = QTime(0, 0, 0, 0);
0037         return QDateTime(result_date, result_time);
0038     }
0039 
0040     //! Return the data type of the column
0041     AbstractColumn::ColumnMode columnMode() const override {
0042         return AbstractColumn::ColumnMode::Month;
0043     }
0044 
0045 protected:
0046     bool inputAcceptable(int, const AbstractColumn* source) override {
0047         return source->columnMode() == AbstractColumn::ColumnMode::BigInt;
0048     }
0049 };
0050 
0051 #endif // ifndef BIGINT2MONTH_FILTER_H