/**************************************************************************** | |
** | |
** 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. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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 | |
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** 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. | |
** | |
** 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. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#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 |