src/gui/transferlistdelegate.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "transferlistdelegate.h"
  30
  31 #include <QModelIndex>
  32
  33 #include "transferlistmodel.h"
  34
  35 TransferListDelegate::TransferListDelegate(QObject *parent)
  36     : QStyledItemDelegate {parent}
  37 {
  38 }
  39
  40 QWidget *TransferListDelegate::createEditor(QWidget *, const QStyleOptionViewItem &, const QModelIndex &) const
  41 {
  42     // No editor here
  43     return nullptr;
  44 }
  45
  46 QSize TransferListDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
  47 {
  48     // Reimplementing sizeHint() because the 'name' column contains text+icon.
  49     // When that WHOLE column goes out of view(eg user scrolls horizontally)
  50     // the rows shrink if the text's height is smaller than the icon's height.
  51     // This happens because icon from the 'name' column is no longer drawn.
  52
  53     if (m_nameColHeight == -1)
  54     {
  55         const QModelIndex nameColumn = index.sibling(index.row(), TransferListModel::TR_NAME);
  56         m_nameColHeight = QStyledItemDelegate::sizeHint(option, nameColumn).height();
  57     }
  58
  59     QSize size = QStyledItemDelegate::sizeHint(option, index);
  60     size.setHeight(std::max(m_nameColHeight, size.height()));
  61     return size;
  62 }
  63
  64 void TransferListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
  65 {
  66     switch (index.column())
  67     {
  68     case TransferListModel::TR_PROGRESS:
  69         {
  70             using namespace BitTorrent;
  71
  72             const auto isEnableState = [](const TorrentState state) -> bool
  73             {
  74                 switch (state)
  75                 {
  76                 case TorrentState::Error:
  77                 case TorrentState::StoppedDownloading:
  78                 case TorrentState::Unknown:
  79                     return false;
  80                 default:
  81                     return true;
  82                 }
  83             };
  84
  85             const int progress = static_cast<int>(index.data(TransferListModel::UnderlyingDataRole).toReal());
  86
  87             const QModelIndex statusIndex = index.siblingAtColumn(TransferListModel::TR_STATUS);
  88             const auto torrentState = statusIndex.data(TransferListModel::UnderlyingDataRole).value<TorrentState>();
  89
  90             QStyleOptionViewItem customOption {option};
  91             customOption.state.setFlag(QStyle::State_Enabled, isEnableState(torrentState));
  92
  93             m_progressBarPainter.paint(painter, customOption, index.data().toString(), progress);
  94         }
  95         break;
  96     default:
  97         QStyledItemDelegate::paint(painter, option, index);
  98         break;
  99     }
 100 }