Better on-demand reloading of torrent data

src/base/bittorrent/session.cpp

@@ -4376,6 +4376,9 @@ void Session::handleSessionStatsAlert(const lt::session_stats_alert *p)
 
 void Session::handleStateUpdateAlert(const lt::state_update_alert *p)
 {
+    QVector<BitTorrent::TorrentHandle *> updatedTorrents;
+    updatedTorrents.reserve(p->status.size());
+
     for (const lt::torrent_status &status : p->status) {
         TorrentHandle *const torrent = m_torrents.value(status.info_hash);
 
@@ -4383,6 +4386,7 @@ void Session::handleStateUpdateAlert(const lt::state_update_alert *p)
             continue;
 
         torrent->handleStateUpdate(status);
+        updatedTorrents.push_back(torrent);
     }
 
     m_torrentStatusReport = TorrentStatusReport();
@@ -4405,7 +4409,7 @@ void Session::handleStateUpdateAlert(const lt::state_update_alert *p)
             ++m_torrentStatusReport.nbErrored;
     }
 
-    emit torrentsUpdated();
+    emit torrentsUpdated(updatedTorrents);
 }
 
 namespace

src/base/bittorrent/session.h

@@ -450,7 +450,7 @@ namespace BitTorrent
 
     signals:
         void statsUpdated();
-        void torrentsUpdated();
+        void torrentsUpdated(const QVector<BitTorrent::TorrentHandle *> &torrents);
         void addTorrentFailed(const QString &error);
         void torrentAdded(BitTorrent::TorrentHandle *const torrent);
         void torrentNew(BitTorrent::TorrentHandle *const torrent);

src/gui/transferlistmodel.cpp

@@ -315,9 +315,18 @@ void TransferListModel::handleTorrentStatusUpdated(BitTorrent::TorrentHandle *co
         emit dataChanged(index(row, 0), index(row, columnCount() - 1));
 }
 
-void TransferListModel::handleTorrentsUpdated()
+void TransferListModel::handleTorrentsUpdated(const QVector<BitTorrent::TorrentHandle *> &torrents)
 {
-    emit dataChanged(index(0, 0), index(rowCount() - 1, columnCount() - 1));
+    const int columns = (columnCount() - 1);
+
+    for (BitTorrent::TorrentHandle *const torrent : torrents) {
+        const int row = m_torrents.indexOf(torrent);
+
+        if (row < 0)
+            continue;
+
+        emit dataChanged(index(row, 0), index(row, columns));
+    }
 }
 
 // Static functions

src/gui/transferlistmodel.h

@@ -97,7 +97,7 @@ private slots:
     void addTorrent(BitTorrent::TorrentHandle *const torrent);
     void handleTorrentAboutToBeRemoved(BitTorrent::TorrentHandle *const torrent);
     void handleTorrentStatusUpdated(BitTorrent::TorrentHandle *const torrent);
-    void handleTorrentsUpdated();
+    void handleTorrentsUpdated(const QVector<BitTorrent::TorrentHandle *> &torrents);
 
 private:
     QList<BitTorrent::TorrentHandle *> m_torrents;