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#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