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130 lines
4.6 KiB
130 lines
4.6 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtSql module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSQLRELATIONALDELEGATE_H
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#define QSQLRELATIONALDELEGATE_H
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#ifdef QT_GUI_LIB
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#include <QtGui/qitemdelegate.h>
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#include <QtGui/qlistview.h>
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#include <QtGui/qcombobox.h>
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#include <QtSql/qsqlrelationaltablemodel.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Sql)
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class QSqlRelationalDelegate: public QItemDelegate
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{
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public:
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explicit QSqlRelationalDelegate(QObject *parent = 0)
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: QItemDelegate(parent)
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{}
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~QSqlRelationalDelegate()
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{}
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QWidget *createEditor(QWidget *parent,
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const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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const QSqlRelationalTableModel *sqlModel = qobject_cast<const QSqlRelationalTableModel *>(index.model());
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QSqlTableModel *childModel = sqlModel ? sqlModel->relationModel(index.column()) : 0;
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if (!childModel)
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return QItemDelegate::createEditor(parent, option, index);
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QComboBox *combo = new QComboBox(parent);
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combo->setModel(childModel);
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combo->setModelColumn(childModel->fieldIndex(sqlModel->relation(index.column()).displayColumn()));
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combo->installEventFilter(const_cast<QSqlRelationalDelegate *>(this));
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return combo;
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}
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void setEditorData(QWidget *editor, const QModelIndex &index) const
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{
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const QSqlRelationalTableModel *sqlModel = qobject_cast<const QSqlRelationalTableModel *>(index.model());
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QComboBox *combo = qobject_cast<QComboBox *>(editor);
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if (!sqlModel || !combo) {
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QItemDelegate::setEditorData(editor, index);
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return;
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}
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combo->setCurrentIndex(combo->findText(sqlModel->data(index).toString()));
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}
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void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
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{
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if (!index.isValid())
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return;
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QSqlRelationalTableModel *sqlModel = qobject_cast<QSqlRelationalTableModel *>(model);
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QSqlTableModel *childModel = sqlModel ? sqlModel->relationModel(index.column()) : 0;
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QComboBox *combo = qobject_cast<QComboBox *>(editor);
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if (!sqlModel || !childModel || !combo) {
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QItemDelegate::setModelData(editor, model, index);
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return;
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}
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int currentItem = combo->currentIndex();
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int childColIndex = childModel->fieldIndex(sqlModel->relation(index.column()).displayColumn());
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int childEditIndex = childModel->fieldIndex(sqlModel->relation(index.column()).indexColumn());
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sqlModel->setData(index,
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childModel->data(childModel->index(currentItem, childColIndex), Qt::DisplayRole),
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Qt::DisplayRole);
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sqlModel->setData(index,
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childModel->data(childModel->index(currentItem, childEditIndex), Qt::EditRole),
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Qt::EditRole);
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}
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QT_GUI_LIB
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#endif // QSQLRELATIONALDELEGATE_H
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