Add Command.Up and Command.Down.

Author: BDisp

Terminal.Gui/Views/TabView/TabRow.cs

@@ -14,6 +14,7 @@ public TabRow (TabView host)
         Id = "tabRow";
 
         CanFocus = true;
+        // Because TabRow has focusable subviews, it must be a TabGroup
         TabStop = TabBehavior.TabGroup;
         Width = Dim.Fill ();
 

Terminal.Gui/Views/TabView/TabView.cs

@@ -28,18 +28,54 @@ public class TabView : View
     public TabView ()
     {
         CanFocus = true;
-        TabStop = TabBehavior.TabStop; // Because TabView has focusable subviews, it must be a TabGroup
-        _tabsBar = new TabRow (this);
+        TabStop = TabBehavior.TabStop;
+        _tabsBar = new (this);
         _containerView = new ();
         ApplyStyleChanges ();
 
         base.Add (_tabsBar);
         base.Add (_containerView);
 
         // Things this view knows how to do
-        AddCommand (Command.Left, () => SwitchTabBy (-1));
-
-        AddCommand (Command.Right, () => SwitchTabBy (1));
+        AddCommand (Command.Left, () =>
+                                  {
+                                      if (Style.TabsSide is TabSide.Top or TabSide.Bottom)
+                                      {
+                                          return SwitchTabBy (-1);
+                                      }
+
+                                      return false;
+                                  });
+
+        AddCommand (Command.Right, () =>
+                                   {
+                                       if (Style.TabsSide is TabSide.Top or TabSide.Bottom)
+                                       {
+                                           return SwitchTabBy (1);
+                                       }
+
+                                       return false;
+                                   });
+
+        AddCommand (Command.Up, () =>
+                                  {
+                                      if (Style.TabsSide is TabSide.Left or TabSide.Right)
+                                      {
+                                          return SwitchTabBy (-1);
+                                      }
+
+                                      return false;
+                                  });
+
+        AddCommand (Command.Down, () =>
+                                   {
+                                       if (Style.TabsSide is TabSide.Left or TabSide.Right)
+                                       {
+                                           return SwitchTabBy (1);
+                                       }
+
+                                       return false;
+                                   });
 
         AddCommand (
                     Command.LeftStart,
@@ -174,6 +210,8 @@ public TabView ()
         // Default keybindings for this view
         KeyBindings.Add (Key.CursorLeft, Command.Left);
         KeyBindings.Add (Key.CursorRight, Command.Right);
+        KeyBindings.Add (Key.CursorUp, Command.Up);
+        KeyBindings.Add (Key.CursorDown, Command.Down);
         KeyBindings.Add (Key.Home, Command.LeftStart);
         KeyBindings.Add (Key.End, Command.RightEnd);
         KeyBindings.Add (Key.PageDown, Command.PageDown);