source: trunk/examples/itemviews/stardelegate/stardelegate.cpp@ 948

/****************************************************************************
**
** 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 examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui>

#include "stardelegate.h"
#include "stareditor.h"
#include "starrating.h"

//! [0]
void StarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                         const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());

        if (option.state & QStyle::State_Selected)
            painter->fillRect(option.rect, option.palette.highlight());

        starRating.paint(painter, option.rect, option.palette,
                         StarRating::ReadOnly);
    } else {
        QStyledItemDelegate::paint(painter, option, index);
    }
//! [0]
}

//! [1]
QSize StarDelegate::sizeHint(const QStyleOptionViewItem &option,
                             const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());
        return starRating.sizeHint();
    } else {
        return QStyledItemDelegate::sizeHint(option, index);
    }
}
//! [1]

//! [2]
QWidget *StarDelegate::createEditor(QWidget *parent,
                                    const QStyleOptionViewItem &option,
                                    const QModelIndex &index) const

{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarEditor *editor = new StarEditor(parent);
        connect(editor, SIGNAL(editingFinished()),
                this, SLOT(commitAndCloseEditor()));
        return editor;
    } else {
        return QStyledItemDelegate::createEditor(parent, option, index);
    }
}
//! [2]

//! [3]
void StarDelegate::setEditorData(QWidget *editor,
                                 const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());
        StarEditor *starEditor = qobject_cast<StarEditor *>(editor);
        starEditor->setStarRating(starRating);
    } else {
        QStyledItemDelegate::setEditorData(editor, index);
    }
}
//! [3]

//! [4]
void StarDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarEditor *starEditor = qobject_cast<StarEditor *>(editor);
        model->setData(index, qVariantFromValue(starEditor->starRating()));
    } else {
        QStyledItemDelegate::setModelData(editor, model, index);
    }
}
//! [4]

//! [5]
void StarDelegate::commitAndCloseEditor()
{
    StarEditor *editor = qobject_cast<StarEditor *>(sender());
    emit commitData(editor);
    emit closeEditor(editor);
}
//! [5]