Merge pull request #13632 from jagannatharjun/progress-style

Allow progress bar styling from custom themes

src/gui/CMakeLists.txt

@@ -26,6 +26,7 @@ add_library(qbt_gui STATIC
     powermanagement/powermanagement.h
     previewlistdelegate.h
     previewselectdialog.h
+    progressbardelegate.h
     properties/downloadedpiecesbar.h
     properties/peerlistsortmodel.h
     properties/peerlistwidget.h
@@ -105,6 +106,7 @@ add_library(qbt_gui STATIC
     powermanagement/powermanagement.cpp
     previewlistdelegate.cpp
     previewselectdialog.cpp
+    progressbardelegate.cpp
     properties/downloadedpiecesbar.cpp
     properties/peerlistsortmodel.cpp
     properties/peerlistwidget.cpp

src/gui/gui.pri

@@ -27,6 +27,7 @@ HEADERS += \
     $$PWD/powermanagement/powermanagement.h \
     $$PWD/previewlistdelegate.h \
     $$PWD/previewselectdialog.h \
+    $$PWD/progressbardelegate.h \
     $$PWD/properties/downloadedpiecesbar.h \
     $$PWD/properties/peerlistsortmodel.h \
     $$PWD/properties/peerlistwidget.h \
@@ -106,6 +107,7 @@ SOURCES += \
     $$PWD/powermanagement/powermanagement.cpp \
     $$PWD/previewlistdelegate.cpp \
     $$PWD/previewselectdialog.cpp \
+    $$PWD/progressbardelegate.cpp \
     $$PWD/properties/downloadedpiecesbar.cpp \
     $$PWD/properties/peerlistsortmodel.cpp \
     $$PWD/properties/peerlistwidget.cpp \

src/gui/progressbardelegate.cpp

@@ -0,0 +1,73 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ *
+ * 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 "progressbardelegate.h"
+
+#include <QApplication>
+#include <QModelIndex>
+#include <QPainter>
+#include <QStyleOptionViewItem>
+
+#if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
+#include <QProxyStyle>
+#endif
+
+ProgressBarDelegate::ProgressBarDelegate(const int progressColumn, const int dataRole, QObject *parent)
+    : QStyledItemDelegate {parent}
+    , m_progressColumn {progressColumn}
+    , m_dataRole {dataRole}
+{
+#if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
+    m_dummyProgressBar.setStyle(new QProxyStyle {"fusion"});
+#endif
+}
+
+void ProgressBarDelegate::initProgressStyleOption(QStyleOptionProgressBar &option, const QModelIndex &index) const
+{
+    option.text = index.data().toString();
+    option.progress = static_cast<int>(index.data(m_dataRole).toReal());
+    option.maximum = 100;
+    option.minimum = 0;
+    option.state |= (QStyle::State_Enabled | QStyle::State_Horizontal);
+    option.textVisible = true;
+}
+
+void ProgressBarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
+{
+    if (index.column() != m_progressColumn)
+        return QStyledItemDelegate::paint(painter, option, index);
+
+    QStyleOptionProgressBar newopt;
+    newopt.initFrom(&m_dummyProgressBar);
+    newopt.rect = option.rect;
+    initProgressStyleOption(newopt, index);
+
+    painter->save();
+    m_dummyProgressBar.style()->drawControl(QStyle::CE_ProgressBar, &newopt, painter, &m_dummyProgressBar);
+    painter->restore();
+}

src/gui/progressbardelegate.h

@@ -0,0 +1,51 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include <QProgressBar>
+#include <QStyledItemDelegate>
+
+class QStyleOptionProgressBar;
+
+class ProgressBarDelegate : public QStyledItemDelegate
+{
+public:
+    ProgressBarDelegate(int progressColumn, int dataRole, QObject *parent = nullptr);
+
+protected:
+    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
+    virtual void initProgressStyleOption(QStyleOptionProgressBar &option, const QModelIndex &index) const;
+
+private:
+    const int m_progressColumn;
+    const int m_dataRole;
+
+    // for painting progressbar with stylesheet option, a dummy progress bar is required
+    QProgressBar m_dummyProgressBar;
+};

src/gui/properties/proplistdelegate.cpp

@@ -42,9 +42,7 @@
 
 #include "base/bittorrent/downloadpriority.h"
 #include "base/bittorrent/torrenthandle.h"
-#include "base/unicodestrings.h"
-#include "base/utils/misc.h"
-#include "base/utils/string.h"
+#include "gui/torrentcontentmodel.h"
 #include "propertieswidget.h"
 
 namespace
@@ -64,107 +62,31 @@ namespace
 }
 
 PropListDelegate::PropListDelegate(PropertiesWidget *properties)
-    : QStyledItemDelegate(properties)
+    : ProgressBarDelegate {PROGRESS, TorrentContentModel::UnderlyingDataRole, properties}
     , m_properties(properties)
 {
 }
 
-void PropListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
+void PropListDelegate::initProgressStyleOption(QStyleOptionProgressBar &option, const QModelIndex &index) const
 {
-    painter->save();
-
-    const QStyle *style = option.widget ? option.widget->style() : QApplication::style();
-    QStyleOptionViewItem opt = option;
-    QStyledItemDelegate::initStyleOption(&opt, index);
-
-    switch (index.column()) {
-    case PCSIZE:
-    case REMAINING:
-        opt.text = Utils::Misc::friendlyUnit(index.data().toLongLong());
-        style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
-        break;
-
-    case PROGRESS: {
-            const qreal progress = (index.data().toReal() * 100);
-            if (progress < 0)
-                break;
-
-            QStyleOptionProgressBar newopt;
-            newopt.rect = opt.rect;
-            newopt.text = (progress == 100) ? QString("100%") : (Utils::String::fromDouble(progress, 1) + '%');
-            newopt.progress = static_cast<int>(progress);
-            newopt.maximum = 100;
-            newopt.minimum = 0;
-            newopt.textVisible = true;
-            if (index.sibling(index.row(), PRIORITY).data().toInt() == static_cast<int>(BitTorrent::DownloadPriority::Ignored)) {
-                newopt.state &= ~QStyle::State_Enabled;
-                newopt.palette = progressBarDisabledPalette();
-            }
-            else {
-                newopt.state |= QStyle::State_Enabled;
-            }
-
-#if defined(Q_OS_WIN) || defined(Q_OS_MACOS)
-            // XXX: To avoid having the progress text on the right of the bar
-            QProxyStyle("fusion").drawControl(QStyle::CE_ProgressBar, &newopt, painter, 0);
-#else
-            QApplication::style()->drawControl(QStyle::CE_ProgressBar, &newopt, painter);
-#endif
-        }
-        break;
-
-    case PRIORITY: {
-            QString text = "";
-            switch (static_cast<BitTorrent::DownloadPriority>(index.data().toInt())) {
-            case BitTorrent::DownloadPriority::Mixed:
-                text = tr("Mixed", "Mixed (priorities");
-                break;
-            case BitTorrent::DownloadPriority::Ignored:
-                text = tr("Not downloaded");
-                break;
-            case BitTorrent::DownloadPriority::High:
-                text = tr("High", "High (priority)");
-                break;
-            case BitTorrent::DownloadPriority::Maximum:
-                text = tr("Maximum", "Maximum (priority)");
-                break;
-            default:
-                text = tr("Normal", "Normal (priority)");
-                break;
-            }
-            opt.text = text;
-            style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
-        }
-        break;
-
-    case AVAILABILITY: {
-            const qreal availability = index.data().toReal();
-            if (availability < 0) {
-                opt.text = tr("N/A");
-            }
-            else {
-                const QString value = (availability >= 1.0)
-                                        ? QLatin1String("100")
-                                        : Utils::String::fromDouble(availability * 100, 1);
-                opt.text = (value + C_THIN_SPACE + QLatin1Char('%'));
-            }
-            style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
-        }
-        break;
-
-    default:
-        QStyledItemDelegate::paint(painter, option, index);
-        break;
+    ProgressBarDelegate::initProgressStyleOption(option, index);
+    const int priority
+        = index.sibling(index.row(), PRIORITY).data(TorrentContentModel::UnderlyingDataRole).toInt();
+    if (static_cast<BitTorrent::DownloadPriority>(priority) == BitTorrent::DownloadPriority::Ignored) {
+        option.state &= ~QStyle::State_Enabled;
+        option.palette = progressBarDisabledPalette();
+    }
+    else {
+        option.state |= QStyle::State_Enabled;
     }
-
-    painter->restore();
 }
 
 void PropListDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
 {
     auto *combobox = static_cast<QComboBox *>(editor);
     // Set combobox index
-    switch (static_cast<BitTorrent::DownloadPriority>(index.data().toInt())) {
+    const int priority = index.data(TorrentContentModel::UnderlyingDataRole).toInt();
+    switch (static_cast<BitTorrent::DownloadPriority>(priority)) {
     case BitTorrent::DownloadPriority::Ignored:
         combobox->setCurrentIndex(0);
         break;
@@ -190,7 +112,8 @@ QWidget *PropListDelegate::createEditor(QWidget *parent, const QStyleOptionViewI
             return nullptr;
     }
 
-    if (index.data().toInt() == static_cast<int>(BitTorrent::DownloadPriority::Mixed))
+    const int priority = index.data(TorrentContentModel::UnderlyingDataRole).toInt();
+    if (static_cast<BitTorrent::DownloadPriority>(priority) == BitTorrent::DownloadPriority::Mixed)
         return nullptr;
 
     auto *editor = new QComboBox(parent);

src/gui/properties/proplistdelegate.h

@@ -29,7 +29,7 @@
 #ifndef PROPLISTDELEGATE_H
 #define PROPLISTDELEGATE_H
 
-#include <QStyledItemDelegate>
+#include "gui/progressbardelegate.h"
 
 class QAbstractItemModel;
 class QModelIndex;
@@ -49,14 +49,13 @@ enum PropColumn
     AVAILABILITY
 };
 
-class PropListDelegate final : public QStyledItemDelegate
+class PropListDelegate final : public ProgressBarDelegate
 {
     Q_OBJECT
 
 public:
     explicit PropListDelegate(PropertiesWidget *properties);
 
-    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     void setEditorData(QWidget *editor, const QModelIndex &index) const override;
     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem & /* option */, const QModelIndex &index) const override;
 
@@ -68,6 +67,8 @@ signals:
     void filteredFilesChanged() const;
 
 private:
+    void initProgressStyleOption(QStyleOptionProgressBar &option, const QModelIndex &index) const override;
+
     PropertiesWidget *m_properties;
 };
 

src/gui/torrentcontentfiltermodel.cpp

@@ -39,7 +39,7 @@ TorrentContentFilterModel::TorrentContentFilterModel(QObject *parent)
     setSourceModel(m_model);
     // Filter settings
     setFilterKeyColumn(TorrentContentModelItem::COL_NAME);
-    setFilterRole(Qt::DisplayRole);
+    setFilterRole(TorrentContentModel::UnderlyingDataRole);
     setDynamicSortFilter(true);
     setSortCaseSensitivity(Qt::CaseInsensitive);
 }

src/gui/torrentcontentmodel.cpp

@@ -180,7 +180,7 @@ namespace
 
 TorrentContentModel::TorrentContentModel(QObject *parent)
     : QAbstractItemModel(parent)
-    , m_rootItem(new TorrentContentModelFolder(QVector<QVariant>({ tr("Name"), tr("Size"), tr("Progress"), tr("Download Priority"), tr("Remaining"), tr("Availability") })))
+    , m_rootItem(new TorrentContentModelFolder(QVector<QString>({ tr("Name"), tr("Size"), tr("Progress"), tr("Download Priority"), tr("Remaining"), tr("Availability") })))
 {
 #if defined(Q_OS_WIN)
     m_fileIconProvider = new WinShellFileIconProvider();
@@ -332,25 +332,34 @@ QVariant TorrentContentModel::data(const QModelIndex &index, int role) const
 
     auto *item = static_cast<TorrentContentModelItem*>(index.internalPointer());
 
-    if ((index.column() == TorrentContentModelItem::COL_NAME) && (role == Qt::DecorationRole)) {
-        if (item->itemType() == TorrentContentModelItem::FolderType)
-            return m_fileIconProvider->icon(QFileIconProvider::Folder);
+    switch (role) {
+    case Qt::DecorationRole: {
+            if (index.column() != TorrentContentModelItem::COL_NAME)
+                return {};
 
-        return m_fileIconProvider->icon(QFileInfo(item->name()));
+            if (item->itemType() == TorrentContentModelItem::FolderType)
+                return m_fileIconProvider->icon(QFileIconProvider::Folder);
+            return m_fileIconProvider->icon(QFileInfo(item->name()));
+        }
+    case Qt::CheckStateRole: {
+            if (index.column() != TorrentContentModelItem::COL_NAME)
+                return {};
+
+            if (item->priority() == BitTorrent::DownloadPriority::Ignored)
+                return Qt::Unchecked;
+            if (item->priority() == BitTorrent::DownloadPriority::Mixed)
+                return Qt::PartiallyChecked;
+            return Qt::Checked;
+        }
+    case Qt::DisplayRole:
+        return item->displayData(index.column());
+
+    case Roles::UnderlyingDataRole:
+        return item->underlyingData(index.column());
+
+    default:
+        return {};
     }
-
-    if ((index.column() == TorrentContentModelItem::COL_NAME) && (role == Qt::CheckStateRole)) {
-        if (item->data(TorrentContentModelItem::COL_PRIO).toInt() == static_cast<int>(BitTorrent::DownloadPriority::Ignored))
-            return Qt::Unchecked;
-        if (item->data(TorrentContentModelItem::COL_PRIO).toInt() == static_cast<int>(BitTorrent::DownloadPriority::Mixed))
-            return Qt::PartiallyChecked;
-        return Qt::Checked;
-    }
-
-    if (role == Qt::DisplayRole)
-        return item->data(index.column());
-
-    return {};
 }
 
 Qt::ItemFlags TorrentContentModel::flags(const QModelIndex &index) const
@@ -367,7 +376,7 @@ Qt::ItemFlags TorrentContentModel::flags(const QModelIndex &index) const
 QVariant TorrentContentModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if ((orientation == Qt::Horizontal) && (role == Qt::DisplayRole))
-        return m_rootItem->data(section);
+        return m_rootItem->displayData(section);
 
     return {};
 }

src/gui/torrentcontentmodel.h

@@ -51,6 +51,11 @@ class TorrentContentModel final : public QAbstractItemModel
     Q_DISABLE_COPY(TorrentContentModel)
 
 public:
+    enum Roles
+    {
+        UnderlyingDataRole = Qt::UserRole
+    };
+
     TorrentContentModel(QObject *parent = nullptr);
     ~TorrentContentModel() override;
 

src/gui/torrentcontentmodelfolder.cpp

@@ -43,7 +43,7 @@ TorrentContentModelFolder::TorrentContentModelFolder(const QString &name, Torren
         m_name.chop(4);
 }
 
-TorrentContentModelFolder::TorrentContentModelFolder(const QVector<QVariant> &data)
+TorrentContentModelFolder::TorrentContentModelFolder(const QVector<QString> &data)
     : TorrentContentModelItem(nullptr)
 {
     Q_ASSERT(data.size() == NB_COL);

src/gui/torrentcontentmodelfolder.h

@@ -43,7 +43,7 @@ public:
     TorrentContentModelFolder(const QString &name, TorrentContentModelFolder *parent);
 
     // Invisible root item constructor
-    explicit TorrentContentModelFolder(const QVector<QVariant> &data);
+    explicit TorrentContentModelFolder(const QVector<QString> &data);
 
     ~TorrentContentModelFolder() override;
 

src/gui/torrentcontentmodelitem.cpp

@@ -30,6 +30,9 @@
 
 #include <QVariant>
 
+#include "base/unicodestrings.h"
+#include "base/utils/misc.h"
+#include "base/utils/string.h"
 #include "torrentcontentmodelfolder.h"
 
 TorrentContentModelItem::TorrentContentModelItem(TorrentContentModelFolder *parent)
@@ -99,7 +102,55 @@ int TorrentContentModelItem::columnCount() const
     return NB_COL;
 }
 
-QVariant TorrentContentModelItem::data(int column) const
+QString TorrentContentModelItem::displayData(const int column) const
+{
+    if (isRootItem())
+        return m_itemData.value(column);
+
+    switch (column) {
+    case COL_NAME:
+        return m_name;
+    case COL_PRIO: {
+            switch (m_priority) {
+            case BitTorrent::DownloadPriority::Mixed:
+                return tr("Mixed", "Mixed (priorities");
+            case BitTorrent::DownloadPriority::Ignored:
+                return tr("Not downloaded");
+            case BitTorrent::DownloadPriority::High:
+                return tr("High", "High (priority)");
+            case BitTorrent::DownloadPriority::Maximum:
+                return tr("Maximum", "Maximum (priority)");
+            default:
+                return tr("Normal", "Normal (priority)");
+            }
+        }
+    case COL_PROGRESS: {
+            const qreal progress = m_progress * 100;
+            return (static_cast<int>(progress) == 100)
+                   ? QString::fromLatin1("100%")
+                   : (Utils::String::fromDouble(progress, 1) + QLatin1Char('%'));
+        }
+    case COL_SIZE:
+        return Utils::Misc::friendlyUnit(m_size);
+    case COL_REMAINING:
+        return Utils::Misc::friendlyUnit(remaining());
+    case COL_AVAILABILITY: {
+            const int avail = availability();
+            if (avail < 0)
+                return tr("N/A");
+
+            const QString value = (avail >= 1.0)
+                                  ? QString::fromLatin1("100")
+                                  : Utils::String::fromDouble((avail * 100), 1);
+            return QString {value + C_THIN_SPACE + QLatin1Char('%')};
+        }
+    default:
+        Q_ASSERT(false);
+        return {};
+    }
+}
+
+QVariant TorrentContentModelItem::underlyingData(const int column) const
 {
     if (isRootItem())
         return m_itemData.value(column);
@@ -110,7 +161,7 @@ QVariant TorrentContentModelItem::data(int column) const
     case COL_PRIO:
         return static_cast<int>(m_priority);
     case COL_PROGRESS:
-        return progress();
+        return progress() * 100;
     case COL_SIZE:
         return m_size;
     case COL_REMAINING:

src/gui/torrentcontentmodelitem.h

@@ -29,6 +29,7 @@
 #ifndef TORRENTCONTENTMODELITEM_H
 #define TORRENTCONTENTMODELITEM_H
 
+#include <QCoreApplication>
 #include <QVector>
 
 #include "base/bittorrent/downloadpriority.h"
@@ -39,6 +40,8 @@ class TorrentContentModelFolder;
 
 class TorrentContentModelItem
 {
+    Q_DECLARE_TR_FUNCTIONS(TorrentContentModelItem);
+
 public:
     enum TreeItemColumns
     {
@@ -77,13 +80,14 @@ public:
     virtual void setPriority(BitTorrent::DownloadPriority newPriority, bool updateParent = true) = 0;
 
     int columnCount() const;
-    QVariant data(int column) const;
+    QString displayData(int column) const;
+    QVariant underlyingData(int column) const;
     int row() const;
 
 protected:
     TorrentContentModelFolder *m_parentItem;
     // Root item members
-    QVector<QVariant> m_itemData;
+    QVector<QString> m_itemData;
     // Non-root item members
     QString m_name;
     qulonglong m_size;

src/gui/transferlistdelegate.cpp

@@ -28,52 +28,15 @@
 
 #include "transferlistdelegate.h"
 
-#include <QApplication>
 #include <QModelIndex>
-#include <QPainter>
-#include <QStyleOptionViewItem>
 
-#if defined(Q_OS_WIN) || defined(Q_OS_MACOS)
-#include <QProxyStyle>
-#endif
-
-#include "base/utils/string.h"
 #include "transferlistmodel.h"
 
 TransferListDelegate::TransferListDelegate(QObject *parent)
-    : QStyledItemDelegate {parent}
+    : ProgressBarDelegate {TransferListModel::TR_PROGRESS, TransferListModel::UnderlyingDataRole, parent}
 {
 }
 
-void TransferListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
-{
-    if (index.column() != TransferListModel::TR_PROGRESS) {
-        QStyledItemDelegate::paint(painter, option, index);
-        return;
-    }
-
-    QStyleOptionProgressBar newopt;
-    newopt.rect = option.rect;
-    newopt.text = index.data().toString();
-    newopt.progress = static_cast<int>(index.data(TransferListModel::UnderlyingDataRole).toReal());
-    newopt.maximum = 100;
-    newopt.minimum = 0;
-    newopt.state = option.state;
-    newopt.textVisible = true;
-
-#if defined(Q_OS_WIN) || defined(Q_OS_MACOS)
-    // XXX: To avoid having the progress text on the right of the bar
-    QProxyStyle fusionStyle {"fusion"};
-    QStyle *style = &fusionStyle;
-#else
-    QStyle *style = option.widget ? option.widget->style() : QApplication::style();
-#endif
-
-    painter->save();
-    style->drawControl(QStyle::CE_ProgressBar, &newopt, painter);
-    painter->restore();
-}
-
 QWidget *TransferListDelegate::createEditor(QWidget *, const QStyleOptionViewItem &, const QModelIndex &) const
 {
     // No editor here

src/gui/transferlistdelegate.h

@@ -28,13 +28,9 @@
 
 #pragma once
 
-#include <QStyledItemDelegate>
+#include "progressbardelegate.h"
 
-class QModelIndex;
-class QPainter;
-class QStyleOptionViewItem;
-
-class TransferListDelegate final : public QStyledItemDelegate
+class TransferListDelegate final : public ProgressBarDelegate
 {
     Q_OBJECT
     Q_DISABLE_COPY(TransferListDelegate)
@@ -42,7 +38,6 @@ class TransferListDelegate final : public QStyledItemDelegate
 public:
     explicit TransferListDelegate(QObject *parent);
 
-    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     QWidget *createEditor(QWidget *, const QStyleOptionViewItem &, const QModelIndex &) const override;
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
 };