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