Implement ProgressBarDelegate

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;
+};