114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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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 License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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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 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 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 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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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 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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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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#include <QtSql/qtsqlglobal.h>
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#ifdef QT_WIDGETS_LIB
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#include <QtWidgets/qitemdelegate.h>
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#include <QtWidgets/qlistview.h>
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#include <QtWidgets/qcombobox.h>
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#include <QtSql/qsqlrelationaltablemodel.h>
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QT_BEGIN_NAMESPACE
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class QSqlRelationalDelegate: public QItemDelegate
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{
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public:
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explicit QSqlRelationalDelegate(QObject *aParent = 0)
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: QItemDelegate(aParent)
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{}
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~QSqlRelationalDelegate()
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{}
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QWidget *createEditor(QWidget *aParent,
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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(aParent, option, index);
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QComboBox *combo = new QComboBox(aParent);
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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 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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#endif // QT_WIDGETS_LIB
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#endif // QSQLRELATIONALDELEGATE_H
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