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/****************************************************************************
**
** Definition of QSqlSelectCursor class
**
** Created : 2002-11-13
**
** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the sql module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "qsqlselectcursor.h"
#include "qsqldriver.h"
#ifndef QT_NO_SQL
class QSqlSelectCursorPrivate
{
public:
QSqlSelectCursorPrivate() : populated( FALSE ) {}
QString query;
bool populated : 1;
};
/*!
\class QSqlSelectCursor qsqlselectcursor.h
\brief The QSqlSelectCursor class provides browsing of general SQL
SELECT statements.
\ingroup database
\module sql
QSqlSelectCursor is a convenience class that makes it possible to
display result sets from general SQL \c SELECT statements in
data-aware Qt widgets. QSqlSelectCursor is read-only and does not
support \c INSERT, \c UPDATE or \c DELETE operations.
Pass the query in at construction time, or use the
QSqlSelectCursor::exec() function.
Example:
\code
...
QSqlSelectCursor* cur = new QSqlSelectCursor( "SELECT id, firstname, lastname FROM author" );
QDataTable* table = new QDataTable( this );
table->setSqlCursor( cur, TRUE, TRUE );
table->refresh();
...
cur->exec( "SELECT * FROM books" );
table->refresh();
...
\endcode
*/
/*!
Constructs a read only cursor on database \a db using the query \a query.
*/
QSqlSelectCursor::QSqlSelectCursor( const QString& query, QSqlDatabase* db )
: QSqlCursor( QString::null, FALSE, db )
{
d = new QSqlSelectCursorPrivate;
d->query = query;
QSqlCursor::setMode( ReadOnly );
if ( !query.isNull() )
exec( query );
}
/*! Constructs a copy of \a other */
QSqlSelectCursor::QSqlSelectCursor( const QSqlSelectCursor& other )
: QSqlCursor( other )
{
d = new QSqlSelectCursorPrivate;
d->query = other.d->query;
d->populated = other.d->populated;
}
/*! Destroys the object and frees any allocated resources */
QSqlSelectCursor::~QSqlSelectCursor()
{
delete d;
}
/*! \reimp */
bool QSqlSelectCursor::exec( const QString& query )
{
d->query = query;
bool ret = QSqlCursor::exec( query );
if ( ret ) {
QSqlCursor::clear();
populateCursor();
}
return ret;
}
/*! \fn bool QSqlSelectCursor::select()
\reimp
*/
/*! \reimp */
bool QSqlSelectCursor::select( const QString&, const QSqlIndex& )
{
bool ret = QSqlCursor::exec( d->query );
if ( ret && !d->populated )
populateCursor();
return ret;
}
/*! \internal */
void QSqlSelectCursor::populateCursor()
{
QSqlRecordInfo inf = driver()->recordInfo( *(QSqlQuery*)this );
for ( QSqlRecordInfo::const_iterator it = inf.begin(); it != inf.end(); ++it )
QSqlCursor::append( *it );
d->populated = TRUE;
}
/*! \fn QSqlIndex QSqlSelectCursor::primaryIndex( bool ) const
\reimp
*/
/*! \fn QSqlIndex QSqlSelectCursor::index( const QStringList& ) const
\reimp
*/
/*! \fn QSqlIndex QSqlSelectCursor::index( const QString& ) const
\reimp
*/
/*! \fn QSqlIndex QSqlSelectCursor::index( const char* ) const
\reimp
*/
/*! \fn void QSqlSelectCursor::setPrimaryIndex( const QSqlIndex& )
\reimp
*/
/*! \fn void QSqlSelectCursor::append( const QSqlFieldInfo& )
\reimp
*/
/*! \fn void QSqlSelectCursor::insert( int, const QSqlFieldInfo& )
\reimp
*/
/*! \fn void QSqlSelectCursor::remove( int )
\reimp
*/
/*! \fn void QSqlSelectCursor::clear()
\reimp
*/
/*! \fn void QSqlSelectCursor::setGenerated( const QString&, bool )
\reimp
*/
/*! \fn void QSqlSelectCursor::setGenerated( int, bool )
\reimp
*/
/*! \fn QSqlRecord* QSqlSelectCursor::editBuffer( bool )
\reimp
*/
/*! \fn QSqlRecord* QSqlSelectCursor::primeInsert()
\reimp
*/
/*! \fn QSqlRecord* QSqlSelectCursor::primeUpdate()
\reimp
*/
/*! \fn QSqlRecord* QSqlSelectCursor::primeDelete()
\reimp
*/
/*! \fn int QSqlSelectCursor::insert( bool )
\reimp
*/
/*! \fn int QSqlSelectCursor::update( bool )
\reimp
*/
/*! \fn int QSqlSelectCursor::del( bool )
\reimp
*/
/*! \fn void QSqlSelectCursor::setMode( int )
\reimp
*/
/*! \fn void QSqlSelectCursor::setSort( const QSqlIndex& )
\reimp
*/
/*! \fn QSqlIndex QSqlSelectCursor::sort() const
\reimp
*/
/*! \fn void QSqlSelectCursor::setFilter( const QString& )
\reimp
*/
/*! \fn QString QSqlSelectCursor::filter() const
\reimp
*/
/*! \fn void QSqlSelectCursor::setName( const QString&, bool )
\reimp
*/
/*! \fn QString QSqlSelectCursor::name() const
\reimp
*/
/*! \fn QString QSqlSelectCursor::toString( const QString&, const QString& ) const
\reimp
*/
#endif // QT_NO_SQL
|
