Disable "add peers" menu items instead of hiding it

Menu item in disabled state can show tool tip to help user understand
why it is unavailable.
Related issue: #15785.
PR #15787.

src/gui/properties/peerlistwidget.cpp

@@ -262,17 +262,14 @@ void PeerListWidget::updatePeerCountryResolutionState()
 
 void PeerListWidget::showPeerListMenu(const QPoint &)
 {
-    BitTorrent::Torrent *const torrent = m_properties->getCurrentTorrent();
+    BitTorrent::Torrent *torrent = m_properties->getCurrentTorrent();
     if (!torrent) return;
 
-    QMenu *menu = new QMenu(this);
+    auto *menu = new QMenu(this);
     menu->setAttribute(Qt::WA_DeleteOnClose);
+    menu->setToolTipsVisible(true);
 
-    // Add Peer Action
-    // Do not allow user to add peers in a private torrent
-    if (!torrent->isQueued() && !torrent->isChecking() && !torrent->isPrivate())
-    {
-        menu->addAction(UIThemeManager::instance()->getIcon("user-group-new"), tr("Add a new peer...")
+    QAction *addNewPeer = menu->addAction(UIThemeManager::instance()->getIcon("user-group-new"), tr("Add peers...")
         , this, [this, torrent]()
     {
         const QVector<BitTorrent::PeerAddress> peersList = PeersAdditionDialog::askForPeers(this);
@@ -285,20 +282,33 @@ void PeerListWidget::showPeerListMenu(const QPoint &)
         else if (peerCount > 0)
             QMessageBox::information(this, tr("Adding peers"), tr("Peers are added to this torrent."));
     });
-    }
-
-    if (!selectionModel()->selectedRows().isEmpty())
-    {
-        menu->addAction(UIThemeManager::instance()->getIcon("edit-copy"), tr("Copy IP:port")
+    QAction *copyPeers = menu->addAction(UIThemeManager::instance()->getIcon("edit-copy"), tr("Copy IP:port")
         , this, &PeerListWidget::copySelectedPeers);
     menu->addSeparator();
-        menu->addAction(UIThemeManager::instance()->getIcon("user-group-delete"), tr("Ban peer permanently")
+    QAction *banPeers = menu->addAction(UIThemeManager::instance()->getIcon("user-group-delete"), tr("Ban peer permanently")
         , this, &PeerListWidget::banSelectedPeers);
+
+    // disable actions
+    const auto disableAction = [](QAction *action, const QString &tooltip)
+    {
+        action->setEnabled(false);
+        action->setToolTip(tooltip);
+    };
+
+    if (torrent->isPrivate())
+        disableAction(addNewPeer, tr("Cannot add peers to a private torrent"));
+    else if (torrent->isChecking())
+        disableAction(addNewPeer, tr("Cannot add peers when the torrent is checking"));
+    else if (torrent->isQueued())
+        disableAction(addNewPeer, tr("Cannot add peers when the torrent is queued"));
+
+    if (selectionModel()->selectedRows().isEmpty())
+    {
+        const QString tooltip = tr("No peer was selected");
+        disableAction(copyPeers, tooltip);
+        disableAction(banPeers, tooltip);
     }
 
-    if (menu->isEmpty())
-        delete menu;
-    else
     menu->popup(QCursor::pos());
 }
 

src/webui/www/private/index.html

@@ -203,7 +203,7 @@
         <li><a href="#CopyTrackerUrl" id="CopyTrackerUrl"><img src="icons/edit-copy.svg" alt="QBT_TR(Copy tracker URL)QBT_TR[CONTEXT=TrackerListWidget]" /> QBT_TR(Copy tracker URL)QBT_TR[CONTEXT=TrackerListWidget]</a></li>
     </ul>
     <ul id="torrentPeersMenu" class="contextMenu">
-        <li><a href="#addPeer"><img src="icons/list-add.svg" alt="QBT_TR(Add a new peer...)QBT_TR[CONTEXT=PeerListWidget]" /> QBT_TR(Add a new peer...)QBT_TR[CONTEXT=PeerListWidget]</a></li>
+        <li><a href="#addPeer"><img src="icons/list-add.svg" alt="QBT_TR(Add peers...)QBT_TR[CONTEXT=PeerListWidget]" /> QBT_TR(Add peers...)QBT_TR[CONTEXT=PeerListWidget]</a></li>
         <li><a href="#copyPeer" id="CopyPeerInfo"><img src="icons/edit-copy.svg" alt="QBT_TR(Copy IP:port)QBT_TR[CONTEXT=PeerListWidget]" /> QBT_TR(Copy IP:port)QBT_TR[CONTEXT=PeerListWidget]</a></li>
         <li class="separator"><a href="#banPeer"><img src="icons/user-group-delete.svg" alt="QBT_TR(Ban peer permanently)QBT_TR[CONTEXT=PeerListWidget]" /> QBT_TR(Ban peer permanently)QBT_TR[CONTEXT=PeerListWidget]</a></li>
     </ul>