Qt 4.0: imagedelegate.cpp Example File (widgets/icons/imagedelegate.cpp)

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# imagedelegate.cpp Example File
widgets/icons/imagedelegate.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 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 GNU
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        #include <QtGui>

        #include "imagedelegate.h"

        ImageDelegate::ImageDelegate(QObject *parent)
            : QItemDelegate(parent)
        {
        }

        QWidget *ImageDelegate::createEditor(QWidget *parent,
                                             const QStyleOptionViewItem & /* option */,
                                             const QModelIndex &index) const
        {
            QComboBox *comboBox = new QComboBox(parent);
            if (index.column() == 1) {
                comboBox->addItem(tr("Normal"));
                comboBox->addItem(tr("Active"));
                comboBox->addItem(tr("Disabled"));
            } else if (index.column() == 2) {
                comboBox->addItem(tr("Off"));
                comboBox->addItem(tr("On"));
            }

            connect(comboBox, SIGNAL(activated(int)), this, SLOT(emitCommitData()));

            return comboBox;
        }

        void ImageDelegate::setEditorData(QWidget *editor,
                                          const QModelIndex &index) const
        {
            QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
            if (!comboBox)
                return;

            int pos = comboBox->findText(index.model()->data(index).toString(),
                                         Qt::MatchExactly);
            comboBox->setCurrentIndex(pos);
        }

        void ImageDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                         const QModelIndex &index) const
        {
            QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
            if (!comboBox)
                return;

            model->setData(index, comboBox->currentText());
        }

        void ImageDelegate::emitCommitData()
        {
            emit commitData(qobject_cast<QWidget *>(sender()));
        }