Revamp torrent content widget

PR #18162.

src/gui/torrentcontentitemdelegate.cpp

@@ -0,0 +1,153 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2022  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "torrentcontentitemdelegate.h"
+
+#include <QComboBox>
+#include <QModelIndex>
+#include <QPainter>
+#include <QProgressBar>
+
+#include "base/bittorrent/downloadpriority.h"
+#include "base/bittorrent/torrent.h"
+#include "gui/torrentcontentmodel.h"
+
+TorrentContentItemDelegate::TorrentContentItemDelegate(QWidget *parent)
+    : QStyledItemDelegate(parent)
+{
+}
+
+void TorrentContentItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
+{
+    auto *combobox = static_cast<QComboBox *>(editor);
+    // Set combobox index
+    const int priority = index.data(TorrentContentModel::UnderlyingDataRole).toInt();
+    switch (static_cast<BitTorrent::DownloadPriority>(priority))
+    {
+    case BitTorrent::DownloadPriority::Ignored:
+        combobox->setCurrentIndex(0);
+        break;
+    case BitTorrent::DownloadPriority::High:
+        combobox->setCurrentIndex(2);
+        break;
+    case BitTorrent::DownloadPriority::Maximum:
+        combobox->setCurrentIndex(3);
+        break;
+    case BitTorrent::DownloadPriority::Mixed:
+        combobox->setCurrentIndex(4);
+        break;
+    default:
+        combobox->setCurrentIndex(1);
+        break;
+    }
+}
+
+QWidget *TorrentContentItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &index) const
+{
+    if (index.column() != TorrentContentModelItem::COL_PRIO)
+        return nullptr;
+
+    auto *editor = new QComboBox(parent);
+    editor->setFocusPolicy(Qt::StrongFocus);
+    editor->addItem(tr("Do not download", "Do not download (priority)"));
+    editor->addItem(tr("Normal", "Normal (priority)"));
+    editor->addItem(tr("High", "High (priority)"));
+    editor->addItem(tr("Maximum", "Maximum (priority)"));
+
+    // add Mixed priority item to the new combobox only for those items with Mixed priority
+    const auto priority = static_cast<BitTorrent::DownloadPriority>(index.data(TorrentContentModel::UnderlyingDataRole).toInt());
+    if (priority == BitTorrent::DownloadPriority::Mixed)
+    {
+        editor->addItem(tr("Mixed", "Mixed (priorities)"));
+    }
+
+    connect(editor, qOverload<int>(&QComboBox::currentIndexChanged), this, [this, editor]()
+    {
+        emit const_cast<TorrentContentItemDelegate *>(this)->commitData(editor);
+    });
+
+    return editor;
+}
+
+void TorrentContentItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
+{
+    const auto *combobox = static_cast<QComboBox *>(editor);
+
+    BitTorrent::DownloadPriority prio = BitTorrent::DownloadPriority::Normal; // NORMAL
+    switch (combobox->currentIndex())
+    {
+    case 0:
+        prio = BitTorrent::DownloadPriority::Ignored; // IGNORED
+        break;
+    case 2:
+        prio = BitTorrent::DownloadPriority::High; // HIGH
+        break;
+    case 3:
+        prio = BitTorrent::DownloadPriority::Maximum; // MAX
+        break;
+    case 4:
+        prio = BitTorrent::DownloadPriority::Mixed; // MIXED
+        break;
+    }
+
+    const int newPriority = static_cast<int>(prio);
+    const int previousPriority = index.data(TorrentContentModel::UnderlyingDataRole).toInt();
+
+    if (newPriority != previousPriority)
+    {
+        model->setData(index, newPriority);
+    }
+}
+
+void TorrentContentItemDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &) const
+{
+    editor->setGeometry(option.rect);
+}
+
+void TorrentContentItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
+{
+    switch (index.column())
+    {
+    case TorrentContentModelItem::COL_PROGRESS:
+        {
+            const int progress = static_cast<int>(index.data(TorrentContentModel::UnderlyingDataRole).toReal());
+            const int priority = index.sibling(index.row(), TorrentContentModelItem::COL_PRIO).data(TorrentContentModel::UnderlyingDataRole).toInt();
+            const bool isEnabled = static_cast<BitTorrent::DownloadPriority>(priority) != BitTorrent::DownloadPriority::Ignored;
+
+            QStyleOptionViewItem customOption {option};
+            customOption.state.setFlag(QStyle::State_Enabled, isEnabled);
+
+            m_progressBarPainter.paint(painter, customOption, index.data().toString(), progress);
+        }
+        break;
+    default:
+        QStyledItemDelegate::paint(painter, option, index);
+        break;
+    }
+}