1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtSql module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #ifndef QSQLRELATIONALTABLEMODEL_H

    43 #define QSQLRELATIONALTABLEMODEL_H

    44 

    45 #include <QtSql/qsqltablemodel.h>

    46 

    47 QT_BEGIN_HEADER

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 QT_MODULE(Sql)

    52 

    53 class Q_SQL_EXPORT QSqlRelation

    54 {

    55 public:

    56     QSqlRelation() {}

    57     QSqlRelation(const QString &aTableName, const QString &indexCol,

    58                const QString &displayCol)

    59         : tName(aTableName), iColumn(indexCol), dColumn(displayCol) {}

    60     inline QString tableName() const

    61     { return tName; }

    62     inline QString indexColumn() const

    63     { return iColumn; }

    64     inline QString displayColumn() const

    65     { return dColumn; }

    66     inline bool isValid() const

    67     { return !(tName.isEmpty() || iColumn.isEmpty() || dColumn.isEmpty()); }

    68 private:

    69     QString tName, iColumn, dColumn;

    70 };

    71 

    72 class QSqlRelationalTableModelPrivate;

    73 

    74 class Q_SQL_EXPORT QSqlRelationalTableModel: public QSqlTableModel

    75 {

    76     Q_OBJECT

    77 

    78 public:

    79     explicit QSqlRelationalTableModel(QObject *parent = 0,

    80                                       QSqlDatabase db = QSqlDatabase());

    81     virtual ~QSqlRelationalTableModel();

    82 

    83     QVariant data(const QModelIndex &item, int role = Qt::DisplayRole) const;

    84     bool setData(const QModelIndex &item, const QVariant &value, int role = Qt::EditRole);

    85     bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex());

    86 

    87     void clear();

    88     bool select();

    89 

    90     void setTable(const QString &tableName);

    91     virtual void setRelation(int column, const QSqlRelation &relation);

    92     QSqlRelation relation(int column) const;

    93     virtual QSqlTableModel *relationModel(int column) const;

    94 

    95 public Q_SLOTS:

    96     void revertRow(int row);

    97 

    98 protected:

    99     QString selectStatement() const;

   100     bool updateRowInTable(int row, const QSqlRecord &values);

   101     bool insertRowIntoTable(const QSqlRecord &values);

   102     QString orderByClause() const;

   103 

   104 private:

   105     Q_DECLARE_PRIVATE(QSqlRelationalTableModel)

   106 };

   107 

   108 QT_END_NAMESPACE

   109 

   110 QT_END_HEADER

   111 

   112 #endif // QSQLRELATIONALTABLEMODEL_H