Revamp torrent content widget

PR #18162.

src/gui/torrentcontentwidget.h

@@ -0,0 +1,121 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2022  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2014  Ivan Sorokin <vanyacpp@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 <QTreeView>
+
+#include "base/bittorrent/downloadpriority.h"
+#include "base/pathfwd.h"
+
+namespace BitTorrent
+{
+    class Torrent;
+    class TorrentContentHandler;
+    class TorrentInfo;
+}
+
+class TorrentContentFilterModel;
+class TorrentContentModel;
+
+class TorrentContentWidget final : public QTreeView
+{
+    Q_OBJECT
+    Q_DISABLE_COPY_MOVE(TorrentContentWidget)
+
+public:
+    enum Column
+    {
+        Name,
+        Size,
+        Progress,
+        Priority,
+        Remaining,
+        Availability
+    };
+
+    enum class DoubleClickAction
+    {
+        Open,
+        Rename
+    };
+
+    enum class ColumnsVisibilityMode
+    {
+        Editable,
+        Locked
+    };
+
+    explicit TorrentContentWidget(QWidget *parent = nullptr);
+
+    void setContentHandler(BitTorrent::TorrentContentHandler *contentHandler);
+    BitTorrent::TorrentContentHandler *contentHandler() const;
+    void refresh();
+
+    DoubleClickAction doubleClickAction() const;
+    void setDoubleClickAction(DoubleClickAction action);
+
+    ColumnsVisibilityMode columnsVisibilityMode() const;
+    void setColumnsVisibilityMode(ColumnsVisibilityMode mode);
+
+    int getFileIndex(const QModelIndex &index) const;
+    Path getItemPath(const QModelIndex &index) const;
+
+    void setFilterPattern(const QString &patternText);
+
+    void checkAll();
+    void checkNone();
+
+signals:
+    void stateChanged();
+
+private:
+    void setModel(QAbstractItemModel *model) override;
+    void keyPressEvent(QKeyEvent *event) override;
+    void wheelEvent(QWheelEvent *event) override;
+    QModelIndex currentNameCell() const;
+    void displayColumnHeaderMenu();
+    void displayContextMenu();
+    void openItem(const QModelIndex &index) const;
+    void openParentFolder(const QModelIndex &index) const;
+    void openSelectedFile();
+    void renameSelectedFile();
+    void applyPriorities(BitTorrent::DownloadPriority priority);
+    void applyPrioritiesByOrder();
+    Path getFullPath(const QModelIndex &index) const;
+    void onItemDoubleClicked(const QModelIndex &index);
+    // Expand single-item folders recursively.
+    // This will trigger sorting and filtering so do it after all relevant data is loaded.
+    void expandRecursively();
+
+    TorrentContentModel *m_model;
+    TorrentContentFilterModel *m_filterModel;
+    DoubleClickAction m_doubleClickAction = DoubleClickAction::Rename;
+    ColumnsVisibilityMode m_columnsVisibilityMode = ColumnsVisibilityMode::Editable;
+};