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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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 *aParent = 0)
+ : QItemDelegate(aParent)
+{}
+
+~QSqlRelationalDelegate()
+{}
+
+QWidget *createEditor(QWidget *aParent,
+ 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(aParent, option, index);
+
+ QComboBox *combo = new QComboBox(aParent);
+ 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