albumdelegate.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2010 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 Mobility Components.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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 "albumdelegate.h"

 #include <QtGui>

 AlbumDelegate::AlbumDelegate(QObject *parent)
     : QAbstractItemDelegate(parent)
 {

 }

 AlbumDelegate::~AlbumDelegate()
 {
 }

 void AlbumDelegate::paint(
         QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     QPen oldPen = painter->pen();

     QStyle *style = QApplication::style();

     int margin = style->pixelMetric(QStyle::PM_ButtonMargin);

     QRect rect = option.rect;

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

         painter->setPen(option.palette.color(QPalette::HighlightedText));
     }

     rect.adjust(margin, margin, -margin, -margin);

     QRect decorationRect = rect;
     decorationRect.setRight(decorationRect.left() + option.decorationSize.width());

     QPixmap decoration = qvariant_cast<QPixmap>(index.data(Qt::DecorationRole));
     if (!decoration.isNull())
         style->drawItemPixmap(painter, decorationRect, Qt::AlignCenter, decoration);
     else
         painter->drawRect(decorationRect);

     rect.setLeft(decorationRect.right() + margin);

     QString text = index.data(Qt::DisplayRole).toString();

     QRect textRect;
     painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
     rect.setTop(textRect.bottom() + margin);

     text = index.data(Artist).toString();

     painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
     rect.setTop(textRect.bottom() + margin);

     QVariant trackCount = index.data(TrackCount);

     if (trackCount.isValid()) {
         text = trackCount.toInt() != 1
                 ? tr("%1 Songs").arg(trackCount.toInt())
                 : tr("1 Song");

         painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
     }

     painter->setPen(oldPen);
 }

 QSize AlbumDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &) const
 {
     QString placeholder = QLatin1String("This is a longish name");

     int margin = QApplication::style()->pixelMetric(QStyle::PM_ButtonMargin);

     QSize size = option.decorationSize;

     size.rheight() += 2 * margin;
     size.rwidth() += 3 * margin + option.fontMetrics.size(0, placeholder).width();

     return size;
 }