Merge bitcoin-core#317: Add Direction column to Peers Tab

6971e79 gui: add Direction column to peers tab (Jon Atack)

Pull request description:

  Picking up bitcoin-core#289

  This adds a `Direction column`, making the peers tab the same as the `Direction/Type` row in the peer details and the direction and type columns in our other user-facing peer connections table in `-netinfo`.

  Users can now sort the peers table by direction. The default sort is set to inbound, then outbound.

  | Master        | PR               |
  | ----------- | ----------- |
  | ![Screen Shot 2021-05-05 at 3 51 09 AM](https://user-images.githubusercontent.com/23396902/117111864-38ff9a00-ad56-11eb-889d-f1c838c845e6.png) | ![Screen Shot 2021-05-05 at 3 35 40 AM](https://user-images.githubusercontent.com/23396902/117111892-4157d500-ad56-11eb-82b1-5bd3e88a4cff.png) |

ACKs for top commit:
  jonatack:
    Tested ACK 6971e79
  ShaMan239:
    tACK 6971e79
  hebasto:
    ACK 6971e79, tested on Linux Mint 20.2 (Qt 5.12.8).

Tree-SHA512: 9716cdedd435f88245a097fed6d4b2b486104d0dd09df739bdb4f2bfad709cbd9c9a231168cc3326e94fa5fddc77dd68f992f20417d04d94930db9fccdbb7de1

Author: hebasto

src/qt/peertablemodel.cpp

@@ -72,8 +72,13 @@ QVariant PeerTableModel::data(const QModelIndex& index, int role) const
         case NetNodeId:
             return (qint64)rec->nodeStats.nodeid;
         case Address:
-            // prepend to peer address down-arrow symbol for inbound connection and up-arrow for outbound connection
-            return QString::fromStdString((rec->nodeStats.fInbound ? "↓ " : "↑ ") + rec->nodeStats.addrName);
+            return QString::fromStdString(rec->nodeStats.addrName);
+        case Direction:
+            return QString(rec->nodeStats.fInbound ?
+                               //: An Inbound Connection from a Peer.
+                               tr("Inbound") :
+                               //: An Outbound Connection to a Peer.
+                               tr("Outbound"));
         case ConnectionType:
             return GUIUtil::ConnectionTypeToQString(rec->nodeStats.m_conn_type, /* prepend_direction */ false);
         case Network:
@@ -94,6 +99,7 @@ QVariant PeerTableModel::data(const QModelIndex& index, int role) const
             return QVariant(Qt::AlignRight | Qt::AlignVCenter);
         case Address:
             return {};
+        case Direction:
         case ConnectionType:
         case Network:
             return QVariant(Qt::AlignCenter);

src/qt/peertablemodel.h

@@ -48,6 +48,7 @@ class PeerTableModel : public QAbstractTableModel
     enum ColumnIndex {
         NetNodeId = 0,
         Address,
+        Direction,
         ConnectionType,
         Network,
         Ping,
@@ -84,6 +85,9 @@ public Q_SLOTS:
         /*: Title of Peers Table column which contains the
             IP/Onion/I2P address of the connected peer. */
         tr("Address"),
+        /*: Title of Peers Table column which indicates the direction
+            the peer connection was initiated from. */
+        tr("Direction"),
         /*: Title of Peers Table column which describes the type of
             peer connection. The "type" describes why the connection exists. */
         tr("Type"),

src/qt/peertablesortproxy.cpp

@@ -26,6 +26,8 @@ bool PeerTableSortProxy::lessThan(const QModelIndex& left_index, const QModelInd
         return left_stats.nodeid < right_stats.nodeid;
     case PeerTableModel::Address:
         return left_stats.addrName.compare(right_stats.addrName) < 0;
+    case PeerTableModel::Direction:
+        return left_stats.fInbound > right_stats.fInbound; // default sort Inbound, then Outbound
     case PeerTableModel::ConnectionType:
         return left_stats.m_conn_type < right_stats.m_conn_type;
     case PeerTableModel::Network: