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Viewing changes to scidavis/src/future/core/datatypes/String2DateTimeFilter.h

  • Committer: Bazaar Package Importer
  • Author(s): Ruben Molina
  • Date: 2009-09-06 11:34:04 UTC
  • Revision ID: james.westby@ubuntu.com-20090906113404-4awaey82l3686w4q
Tags: upstream-0.2.3
Import upstream version 0.2.3

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scidavis/src/future/core/datatypes/String2DateTimeFilter.h
 
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/***************************************************************************
 
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    File                 : String2DateTimeFilter.h
 
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    Project              : SciDAVis
 
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    --------------------------------------------------------------------
 
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    Copyright            : (C) 2007 by Tilman Benkert,
 
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                           Knut Franke
 
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    Email (use @ for *)  : thzs*gmx.net, knut.franke*gmx.de
 
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    Description          : Conversion filter QString -> QDateTime.
 
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 ***************************************************************************/
 
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/***************************************************************************
 
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 *                                                                         *
 
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 *  This program is free software; you can redistribute it and/or modify   *
 
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 *  it under the terms of the GNU General Public License as published by   *
 
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 *  the Free Software Foundation; either version 2 of the License, or      *
 
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 *  (at your option) any later version.                                    *
 
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 *                                                                         *
 
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 *  This program is distributed in the hope that it will be useful,        *
 
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 
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 *  GNU General Public License for more details.                           *
 
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 *                                                                         *
 
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 *   You should have received a copy of the GNU General Public License     *
 
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 *   along with this program; if not, write to the Free Software           *
 
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 *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
 
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 *   Boston, MA  02110-1301  USA                                           *
 
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 *                                                                         *
 
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 ***************************************************************************/
 
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#ifndef STRING2DATE_TIME_FILTER_H
 
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#define STRING2DATE_TIME_FILTER_H
 
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#include "core/AbstractSimpleFilter.h"
 
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#include <QDateTime>
 
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#include <QDate>
 
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#include <QTime>
 
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/**
 
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 * \brief Conversion filter QString -> QDateTime.
 
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 *
 
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 * The standard use of this filter is explicitly specifiying the date/time format of the strings
 
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 * on the input, either in the constructor or via setFormat().
 
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 * However, if the input fails to comply to this format, String2DateTimeFilter
 
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 * tries to guess the format, using internal lists of common date and time formats (#date_formats
 
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 * and #time_formats).
 
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 */
 
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class String2DateTimeFilter : public AbstractSimpleFilter
 
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{
 
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        Q_OBJECT
 
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        public:
 
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                //! Standard constructor.
 
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                explicit String2DateTimeFilter(QString format="yyyy-MM-dd hh:mm:ss.zzz") : d_format(format) {}
 
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                //! Set the format string to be used for conversion.
 
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                void setFormat(const QString& format);
 
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                //! Return the format string
 
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                /**
 
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                 * The default format string is "yyyy-MM-dd hh:mm:ss.zzz".
 
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                 * \sa QDate::toString()
 
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                 */
 
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                QString format() const { return d_format; }
 
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                //! Return the data type of the column
 
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                virtual SciDAVis::ColumnDataType dataType() const { return SciDAVis::TypeQDateTime; }
 
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                //! \name XML related functions
 
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                //@{
 
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                virtual void writeExtraAttributes(QXmlStreamWriter * writer) const;
 
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                virtual bool load(XmlStreamReader * reader);
 
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                //@}
 
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        signals:
 
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                void formatChanged();
 
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        private:
 
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                friend class String2DateTimeFilterSetFormatCmd;
 
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                //! The format string.
 
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                QString d_format;
 
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                static const char * date_formats[];
 
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                static const char * time_formats[];
 
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        public:
 
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                virtual QDateTime dateTimeAt(int row) const;
 
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                virtual QDate dateAt(int row) const { return dateTimeAt(row).date(); }
 
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                virtual QTime timeAt(int row) const { return dateTimeAt(row).time(); }
 
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                virtual bool isInvalid(int row) const { 
 
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                        const AbstractColumn *col = d_inputs.value(0);
 
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                        if (!col) return false;
 
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                        return !(dateTimeAt(row).isValid()) || col->isInvalid(row);
 
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                }
 
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                virtual bool isInvalid(Interval<int> i) const {
 
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                        if (!d_inputs.value(0)) return false;
 
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                        for (int row = i.start(); row <= i.end(); row++) {
 
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                                if (!isInvalid(row))
 
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                                        return false;
 
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                        }
 
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                        return true;
 
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                }
 
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                virtual QList< Interval<int> > invalidIntervals() const 
 
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                {
 
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                        IntervalAttribute<bool> validity;
 
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                        if (d_inputs.value(0)) {
 
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                                int rows = d_inputs.value(0)->rowCount();
 
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                                for (int i=0; i<rows; i++) 
 
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                                        validity.setValue(i, isInvalid(i));
 
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                        }
 
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                        return validity.intervals();
 
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                }
 
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        protected:
 
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                //! Using typed ports: only string inputs are accepted.
 
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                virtual bool inputAcceptable(int, const AbstractColumn *source) {
 
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                        return source->dataType() == SciDAVis::TypeQString;
 
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                }
 
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};
 
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class String2DateTimeFilterSetFormatCmd : public QUndoCommand
 
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{
 
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        public:
 
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                String2DateTimeFilterSetFormatCmd(String2DateTimeFilter* target, const QString &new_format);
 
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                virtual void redo();
 
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                virtual void undo();
 
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        private:
 
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                String2DateTimeFilter* d_target;
 
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                QString d_other_format;
 
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};
 
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#endif // ifndef STRING2DATE_TIME_FILTER_H
 
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