Qt Mobility Reference Documentation

downloaddelegate.cpp Example File

documentshare/downloaddelegate.cpp
 /****************************************************************************
 **
 ** 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 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 "downloaddelegate.h"

 #include "download.h"
 #include "downloadmodel.h"

 #include <QtGui>

 DownloadDelegate::DownloadDelegate(QObject *parent)
     : QAbstractItemDelegate(parent)
 {
 }

 DownloadDelegate::~DownloadDelegate()
 {
 }

 void DownloadDelegate::paint(
         QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     QStyle *style = QApplication::style();
     int state = index.data(DownloadModel::StateRole).toInt();

     int hMargin = style->pixelMetric(QStyle::PM_FocusFrameHMargin, &option);
     int vMargin = style->pixelMetric(QStyle::PM_FocusFrameVMargin, &option);

     QRect rect = option.rect;

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

     rect.adjust(hMargin, vMargin, -hMargin, -vMargin);

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

     QStyleOptionProgressBarV2 progressOption;
     progressOption.minimum = 0;
     progressOption.maximum = index.data(DownloadModel::MaximumProgressRole).toInt();
     progressOption.progress = index.data(DownloadModel::CurrentProgressRole).toInt();
     progressOption.orientation = Qt::Horizontal;
     progressOption.rect = rect;
     progressOption.palette = option.palette;
     progressOption.palette.setColor(
             QPalette::Highlight, option.palette.color(QPalette::AlternateBase));

     style->drawControl(QStyle::CE_ProgressBar, &progressOption, painter);

     QRect textRect = style->subElementRect(QStyle::SE_ProgressBarContents, &progressOption);

     style->drawItemText(painter, textRect, 0, option.palette, true, text);
 }

 QSize DownloadDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     QStyle *style = QApplication::style();
     int state = index.data(DownloadModel::StateRole).toInt();

     int hMargin = style->pixelMetric(QStyle::PM_FocusFrameHMargin, &option);
     int vMargin = style->pixelMetric(QStyle::PM_FocusFrameVMargin, &option);

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

     QRect textRect = style->itemTextRect(
             option.fontMetrics, option.rect, option.displayAlignment, true, text);
     textRect.adjust(-hMargin, -vMargin, hMargin, vMargin);

     QStyleOptionProgressBarV2 progressOption;
     progressOption.minimum = 0;
     progressOption.maximum = index.data(DownloadModel::MaximumProgressRole).toInt();
     progressOption.progress = index.data(DownloadModel::CurrentProgressRole).toInt();
     progressOption.orientation = Qt::Horizontal;
     progressOption.rect = option.rect;

     QSize size = style->sizeFromContents(
             QStyle::CT_ProgressBar, &progressOption, textRect.size());

     size.rwidth() += 2 * hMargin;
     size.rheight() += 2 * vMargin;

     return size;
 }

 QString DownloadDelegate::stateText(int state, const QString &displayText) const
 {
     switch (state) {
     case Download::Downloading:
         return tr("Downloading:\n  %1").arg(displayText);
     case Download::Finalizing:
         return tr("Registering:\n  %1").arg(displayText);
     case Download::Finished:
         return tr("Download Finished:\n  %1").arg(displayText);
     case Download::DownloadError:
         return tr("Download Failed:\n  %1").arg(displayText);
     case Download::ItemError:
         return tr("Registration Failed:\n  %1").arg(displayText);
     default:
         return QString();
     }
 }


Copyright © 2009-2010 Nokia Corporation and/or its subsidiary(-ies) Trademarks
Qt Mobility Project 1.1.0