api/qgsattributetableidcolumnpair_8cpp_source.html

00001 /***************************************************************************
00002      QgsAttributeTableIdColumnPair.cpp
00003      --------------------------------------
00004     Date                 : Feb 2009
00005     Copyright            : (C) 2009 Vita Cizek
00006     Email                : weetya (at) gmail.com
00007  ***************************************************************************
00008  *                                                                         *
00009  *   This program is free software; you can redistribute it and/or modify  *
00010  *   it under the terms of the GNU General Public License as published by  *
00011  *   the Free Software Foundation; either version 2 of the License, or     *
00012  *   (at your option) any later version.                                   *
00013  *                                                                         *
00014  ***************************************************************************/
00015
00016 #include "qgsattributetableidcolumnpair.h"
00017 #include "qgsfield.h"
00018
00019 #include <QVariant>
00020
00021 //could be faster when type guessed before sorting
00022 bool QgsAttributeTableIdColumnPair::operator<( const QgsAttributeTableIdColumnPair &b ) const
00023 {
00024   //QVariant thinks gid is a string!
00025   QVariant::Type columnType = mItem.type();
00026
00027   if ( mItem.isNull() )
00028     return 1;
00029
00030   if ( b.mItem.isNull() )
00031     return 0;
00032
00033   switch ( columnType )
00034   {
00035     case QVariant::Int:
00036     case QVariant::UInt:
00037     case QVariant::LongLong:
00038     case QVariant::ULongLong:
00039       return mItem.toLongLong() < b.mItem.toLongLong();
00040
00041     case QVariant::Double:
00042       return mItem.toDouble() < b.mItem.toDouble();
00043
00044     default:
00045       return mItem.toString().localeAwareCompare( b.mItem.toString() ) < 0;
00046   }
00047 }