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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "q3sqlselectcursor.h"
#include "qsqldriver.h"
#include "q3sqlrecordinfo.h"
#ifndef QT_NO_SQL
QT_BEGIN_NAMESPACE
class Q3SqlSelectCursorPrivate
{
public:
Q3SqlSelectCursorPrivate() : populated(false) {}
QString query;
bool populated : 1;
};
/*!
\class Q3SqlSelectCursor
\brief The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements.
\compat
Q3SqlSelectCursor is a convenience class that makes it possible to
display result sets from general SQL \c SELECT statements in
data-aware Qt widgets. Q3SqlSelectCursor 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
Q3SqlSelectCursor::exec() function.
Example:
\snippet doc/src/snippets/code/src_qt3support_sql_q3sqlselectcursor.cpp 0
*/
/*!
Constructs a read only cursor on database \a db using the query \a query.
*/
Q3SqlSelectCursor::Q3SqlSelectCursor(const QString& query, QSqlDatabase db)
: Q3SqlCursor(QString(), false, db)
{
d = new Q3SqlSelectCursorPrivate;
d->query = query;
Q3SqlCursor::setMode(ReadOnly);
if (!query.isEmpty())
exec(query);
}
/*! Constructs a copy of \a other */
Q3SqlSelectCursor::Q3SqlSelectCursor(const Q3SqlSelectCursor& other)
: Q3SqlCursor(other)
{
d = new Q3SqlSelectCursorPrivate;
d->query = other.d->query;
d->populated = other.d->populated;
}
/*! Destroys the object and frees any allocated resources */
Q3SqlSelectCursor::~Q3SqlSelectCursor()
{
delete d;
}
/*! \internal */
bool Q3SqlSelectCursor::exec(const QString& query)
{
d->query = query;
bool ret = Q3SqlCursor::exec(query);
if (ret) {
Q3SqlCursor::clear();
populateCursor();
}
return ret;
}
/*! \fn bool Q3SqlSelectCursor::select()
\internal
*/
/*! \internal */
bool Q3SqlSelectCursor::select(const QString&, const QSqlIndex&)
{
bool ret = Q3SqlCursor::exec(d->query);
if (ret && !d->populated)
populateCursor();
return ret;
}
/*! \internal */
void Q3SqlSelectCursor::populateCursor()
{
Q3SqlRecordInfo inf = Q3SqlRecordInfo(record());
for (Q3SqlRecordInfo::const_iterator it = inf.begin(); it != inf.end(); ++it)
Q3SqlCursor::append(*it);
d->populated = true;
}
/*! \fn QSqlIndex Q3SqlSelectCursor::primaryIndex(bool) const
\internal
*/
/*! \fn QSqlIndex Q3SqlSelectCursor::index(const QStringList&) const
\internal
*/
/*! \fn QSqlIndex Q3SqlSelectCursor::index(const QString&) const
\internal
*/
/*! \fn QSqlIndex Q3SqlSelectCursor::index(const char*) const
\internal
*/
/*! \fn void Q3SqlSelectCursor::setPrimaryIndex(const QSqlIndex&)
\internal
*/
/*! \fn void Q3SqlSelectCursor::append(const Q3SqlFieldInfo&)
\internal
*/
/*! \fn void Q3SqlSelectCursor::insert(int, const Q3SqlFieldInfo&)
\internal
*/
/*! \fn void Q3SqlSelectCursor::remove(int)
\internal
*/
/*! \fn void Q3SqlSelectCursor::clear()
\internal
*/
/*! \fn void Q3SqlSelectCursor::setGenerated(const QString&, bool)
\internal
*/
/*! \fn void Q3SqlSelectCursor::setGenerated(int, bool)
\internal
*/
/*! \fn QSqlRecord* Q3SqlSelectCursor::editBuffer(bool)
\internal
*/
/*! \fn QSqlRecord* Q3SqlSelectCursor::primeInsert()
\internal
*/
/*! \fn QSqlRecord* Q3SqlSelectCursor::primeUpdate()
\internal
*/
/*! \fn QSqlRecord* Q3SqlSelectCursor::primeDelete()
\internal
*/
/*! \fn int Q3SqlSelectCursor::insert(bool)
\internal
*/
/*! \fn int Q3SqlSelectCursor::update(bool)
\internal
*/
/*! \fn int Q3SqlSelectCursor::del(bool)
\internal
*/
/*! \fn void Q3SqlSelectCursor::setMode(int)
\internal
*/
/*! \fn void Q3SqlSelectCursor::setSort(const QSqlIndex&)
\internal
*/
/*! \fn QSqlIndex Q3SqlSelectCursor::sort() const
\internal
*/
/*! \fn void Q3SqlSelectCursor::setFilter(const QString&)
\internal
*/
/*! \fn QString Q3SqlSelectCursor::filter() const
\internal
*/
/*! \fn void Q3SqlSelectCursor::setName(const QString&, bool)
\internal
*/
/*! \fn QString Q3SqlSelectCursor::name() const
\internal
*/
/*! \fn QString Q3SqlSelectCursor::toString(const QString&, const QString&) const
\internal
*/
/*!
\fn int Q3SqlSelectCursor::update(const QString & filter, bool invalidate = true)
\overload
Updates the database with the current contents of the cursor edit
buffer using the specified \a filter. Returns the number of
records which were updated.
For error information, use lastError().
Only records which meet the filter criteria are updated, otherwise
all records in the table are updated.
If \a invalidate is true (the default), the cursor can no longer
be navigated. A new select() call must be made before you can move
to a valid record.
\sa Q3SqlCursor::update() primeUpdate() setMode() lastError()
*/
QT_END_NAMESPACE
#endif // QT_NO_SQL
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