QGIS » QGIS Application

qgsfieldvalidator.h

#include <qgsfieldvalidator.h>

        le->setValidator( new QgsFieldValidator( le, field ) );

/***************************************************************************

                         qgsfieldvalidator.h  -  description

                             -------------------

    begin                : March 2011

    copyright            : (C) 2011 by SunilRajKiran-kCube

    email                : [email protected]

  adapted version of QValidator for QgsField

 ***************************************************************************/

/***************************************************************************

 *                                                                         *

 *   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.                                   *

 *                                                                         *

 ***************************************************************************/

/* $Id$ */

#ifndef QGSFIELDVALIDATOR_H

#define QGSFIELDVALIDATOR_H

#include <QMessageBox>

#include <QValidator>

#include <QLocale>

#include <QVariant>

#include <QSettings>

#include "qgslogger.h"

#include "qgslonglongvalidator.h"

#include "qgsfield.h"

class GUI_EXPORT QgsFieldValidator : public QValidator

{

   Q_OBJECT     

public:

QgsFieldValidator(QObject *parent,  const QgsField &field, int t, int b):QValidator(parent)

{

	fieldLength = field.length();

	fieldPrecision = field.precision();

	fieldType = field.type();

	switch(fieldType)

	{

		case QVariant::Int :

			validator = new QIntValidator(b, t, parent);

			break;

		case QVariant::Double :

			validator = new QDoubleValidator(parent);

			break;

		case QVariant::LongLong :

			validator = new QgsLongLongValidator(b, t, parent);

			break;

		default:

			validator = 0;

	}

}

QgsFieldValidator(QObject *parent, const QgsField &field):QValidator(parent)

{

	fieldLength = field.length();

	fieldPrecision = field.precision();

	fieldType = field.type();

	switch(fieldType)

	{

		case QVariant::Int :

			validator = new QIntValidator(parent);

			break;

		case QVariant::Double :

			validator = new QDoubleValidator(parent);

			break;

		case QVariant::LongLong :

			validator = new QgsLongLongValidator(parent);

			break;

		default:

			validator = 0;

	}	

}

~QgsFieldValidator()

{

  delete validator;	

}

QValidator::State validate(QString &s, int &i) const

{

	QSettings settings;

	QString nullValue = settings.value( "qgis/nullValue", "NULL" ).toString();

	if(validator && validator->validate(s, i) == Invalid)

	{

		return Invalid;

	}

	if(validator && validator->validate(s, i) == Intermediate)

	{

		if(s.length() > fieldLength)

		return Invalid;

		return Intermediate;

	}

	if(fieldType == QVariant::String)

	{

	if ( s.size()>0 && (s.size() <=  nullValue.size()) && s == nullValue.left( s.size() ) ) 

	return Intermediate;

  }

	if(s.length() > fieldLength)

		return Invalid;

	if(fieldType == QVariant::Double)

	{

		int len = s.length();

		int prec = s.indexOf(QChar('.'));

		QgsDebugMsg(tr("length %1 %2") . arg(len). arg(prec));

		if(s.indexOf(QChar('.')) != -1 && s.length() - (s.indexOf(QChar('.')) + 1) > fieldPrecision)

			return Invalid;

	}

	return Acceptable;

}

private:

    // Disables copy constructing

    Q_DISABLE_COPY( QgsFieldValidator )   

    QValidator *validator;

    int fieldLength;

    QVariant::Type fieldType;

    int fieldPrecision;

};

#endif // QGSFIELDVALIDATOR_H