Prevents open menu bar if it's invisible and close all opened menus.

Terminal.Gui/Views/Menu.cs

@@ -943,6 +943,17 @@ public bool UseSubMenusSingleFrame {
 		/// </summary>
 		public Key Key { get; set; } = Key.F9;
 
+		///<inheritdoc/>
+		public override bool Visible {
+			get => base.Visible;
+			set {
+				base.Visible = value;
+				if (!value) {
+					CloseAllMenus ();
+				}
+			}
+		}
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="MenuBar"/>.
 		/// </summary>
@@ -1745,10 +1756,11 @@ private void ProcessMenu (int i, MenuBarItem mi)
 		public override bool ProcessHotKey (KeyEvent kb)
 		{
 			if (kb.Key == Key) {
-				if (!IsMenuOpen)
+				if (Visible && !IsMenuOpen) {
 					OpenMenu ();
-				else
+				} else {
 					CloseAllMenus ();
+				}
 				return true;
 			}
 

UnitTests/Menus/MenuTests.cs

@@ -1787,5 +1787,27 @@ void Close ()
 			Assert.False (CanExecuteNew ());
 			Assert.True (CanExecuteClose ());
 		}
+
+		[Fact, AutoInitShutdown]
+		public void Visible_False_Key_Does_Not_Open_And_Close_All_Opened_Menus ()
+		{
+			var menu = new MenuBar (new MenuBarItem [] {
+				new MenuBarItem ("File", new MenuItem [] {
+					new MenuItem ("New", "", null)
+				})
+			});
+			Application.Top.Add (menu);
+			Application.Begin (Application.Top);
+
+			Assert.True (menu.Visible);
+			Assert.True (menu.ProcessHotKey (new KeyEvent (menu.Key, new KeyModifiers ())));
+			Assert.True (menu.IsMenuOpen);
+
+			menu.Visible = false;
+			Assert.False (menu.IsMenuOpen);
+
+			Assert.True (menu.ProcessHotKey (new KeyEvent (menu.Key, new KeyModifiers ())));
+			Assert.False (menu.IsMenuOpen);
+		}
 	}
 }