qgsxmlutils.h

Go to the documentation of this file.

/***************************************************************************
    qgsxmlutils.h
    ---------------------
    begin                : December 2013
    copyright            : (C) 2013 by Martin Dobias
    email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSXMLUTILS_H
#define QGSXMLUTILS_H

class QDomDocument;

class QgsRectangle;

#include <QDomElement>
#include <QMetaEnum>

#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsunittypes.h"



class CORE_EXPORT QgsXmlUtils
{
  public:

    /* reading */

    static QgsUnitTypes::DistanceUnit readMapUnits( const QDomElement &element );

    static QgsRectangle readRectangle( const QDomElement &element );

    /* writing */

    static QDomElement writeMapUnits( QgsUnitTypes::DistanceUnit units, QDomDocument &doc );

    static QDomElement writeRectangle( const QgsRectangle &rect, QDomDocument &doc );

    static QDomElement writeVariant( const QVariant &value, QDomDocument &doc );

    static QVariant readVariant( const QDomElement &element );

    template<class T> static T readFlagAttribute( const QDomElement &element, const QString &attributeName, T defaultValue ) SIP_SKIP
    {
      T value = defaultValue;
      // Get source categories
      QMetaEnum metaEnum = QMetaEnum::fromType<T>();
      QString sourceCategoriesStr( element.attribute( attributeName, metaEnum.valueToKeys( static_cast<int>( defaultValue ) ) ) );
      if ( metaEnum.isValid() )
      {
        bool ok = false;
        int newValue = metaEnum.keysToValue( sourceCategoriesStr.toUtf8().constData(), &ok );
        if ( ok )
          value = static_cast<T>( newValue );
      }
      return value;
    }
};


#endif // QGSXMLUTILS_H