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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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** 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
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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****************************************************************************/
#ifndef QSQLRELATIONALDELEGATE_H
#define QSQLRELATIONALDELEGATE_H
#ifdef QT_WIDGETS_LIB
#include <QtWidgets/qitemdelegate.h>
#include <QtWidgets/qlistview.h>
#include <QtWidgets/qcombobox.h>
#include <QtSql/qsqlrelationaltablemodel.h>
QT_BEGIN_NAMESPACE
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 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
#endif // QT_WIDGETS_LIB
#endif // QSQLRELATIONALDELEGATE_H
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