Double2MonthFilter.h

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#ifndef DOUBLE2MONTH_FILTER_H
#define DOUBLE2MONTH_FILTER_H
 
#include "../AbstractSimpleFilter.h"
#include <QDateTime>
#include <math.h>
#include "lib/XmlStreamReader.h"
#include <QXmlStreamWriter>
 
class Double2MonthFilter : public AbstractSimpleFilter
{
    Q_OBJECT
    public:
        virtual QDate dateAt(int row) const {
            return dateTimeAt(row).date();
        }
        virtual QTime timeAt(int row) const {
            return dateTimeAt(row).time();
        }
        virtual QDateTime dateTimeAt(int row) const {
            if (!d_inputs.value(0)) return QDateTime();
            double input_value = d_inputs.value(0)->valueAt(row);
            // Don't use Julian days here since support for years < 1 is bad
            // Use 1900-01-01 instead
            QDate result_date = QDate(1900,1,1).addMonths(qRound(input_value - 1.0));
            QTime result_time = QTime(0,0,0,0);
            return QDateTime(result_date, result_time);
        }
 
        virtual SciDAVis::ColumnDataType dataType() const { return SciDAVis::TypeQDateTime; }
 
    protected:
        virtual bool inputAcceptable(int, const AbstractColumn *source) {
            return source->dataType() == SciDAVis::TypeDouble;
        }
};
 
#endif // ifndef DOUBLE2MONTH_FILTER_H