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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 QtSql 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSQLRELATIONALDELEGATE_H
+#define QSQLRELATIONALDELEGATE_H
+
+#ifdef QT_GUI_LIB
+
+#include <QtGui/qitemdelegate.h>
+#include <QtGui/qlistview.h>
+#include <QtGui/qcombobox.h>
+#include <QtSql/qsqlrelationaltablemodel.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Sql)
+
+class QSqlRelationalDelegate: public QItemDelegate
+{
+public:
+
+explicit QSqlRelationalDelegate(QObject *parent = 0)
+    : QItemDelegate(parent)
+{}
+
+~QSqlRelationalDelegate()
+{}
+
+QWidget *createEditor(QWidget *parent,
+                      const QStyleOptionViewItem &option,
+                      const QModelIndex &index) const
+{
+    const QSqlRelationalTableModel *sqlModel = qobject_cast<const QSqlRelationalTableModel *>(index.model());
+    QSqlTableModel *childModel = sqlModel ? sqlModel->relationModel(index.column()) : 0;
+    if (!childModel)
+        return QItemDelegate::createEditor(parent, option, index);
+
+    QComboBox *combo = new QComboBox(parent);
+    combo->setModel(childModel);
+    combo->setModelColumn(childModel->fieldIndex(sqlModel->relation(index.column()).displayColumn()));
+    combo->installEventFilter(const_cast<QSqlRelationalDelegate *>(this));
+
+    return combo;
+}
+
+void setEditorData(QWidget *editor, const QModelIndex &index) const
+{
+    const QSqlRelationalTableModel *sqlModel = qobject_cast<const QSqlRelationalTableModel *>(index.model());
+    QComboBox *combo = qobject_cast<QComboBox *>(editor);
+    if (!sqlModel || !combo) {
+        QItemDelegate::setEditorData(editor, index);
+        return;
+    }
+    combo->setCurrentIndex(combo->findText(sqlModel->data(index).toString()));
+}
+
+void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
+{
+    if (!index.isValid())
+        return;
+
+    QSqlRelationalTableModel *sqlModel = qobject_cast<QSqlRelationalTableModel *>(model);
+    QSqlTableModel *childModel = sqlModel ? sqlModel->relationModel(index.column()) : 0;
+    QComboBox *combo = qobject_cast<QComboBox *>(editor);
+    if (!sqlModel || !childModel || !combo) {
+        QItemDelegate::setModelData(editor, model, index);
+        return;
+    }
+
+    int currentItem = combo->currentIndex();
+    int childColIndex = childModel->fieldIndex(sqlModel->relation(index.column()).displayColumn());
+    int childEditIndex = childModel->fieldIndex(sqlModel->relation(index.column()).indexColumn());
+    sqlModel->setData(index,
+            childModel->data(childModel->index(currentItem, childColIndex), Qt::DisplayRole),
+            Qt::DisplayRole);
+    sqlModel->setData(index,
+            childModel->data(childModel->index(currentItem, childEditIndex), Qt::EditRole),
+            Qt::EditRole);
+}
+
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QT_GUI_LIB
+
+#endif // QSQLRELATIONALDELEGATE_H