Implement "hide UI" option (#2411)

* Implement jduncanator method

* Rename function/button ID

* Move option to Actions menu (makes no sense while emulation is inactive...)

Ryujinx/Ui/MainWindow.cs

@@ -1072,6 +1072,15 @@ namespace Ryujinx.Ui
             ConfigurationState.Instance.Graphics.AspectRatio.Value = ((int)aspectRatio + 1) > Enum.GetNames(typeof(AspectRatio)).Length - 1 ? AspectRatio.Fixed4x3 : aspectRatio + 1;
         }
 
+        private void Focus_Menu_Bar(object sender, KeyReleaseEventArgs args)
+        {
+            if (args.Event.Key == Gdk.Key.Alt_L)
+            {
+                ToggleExtraWidgets(true);
+                _menuBar.GrabFocus();
+            }
+        }
+
         private void Row_Clicked(object sender, ButtonReleaseEventArgs args)
         {
             if (args.Event.Button != 3 /* Right Click */)
@@ -1364,6 +1373,11 @@ namespace Ryujinx.Ui
             settingsWindow.Show();
         }
 
+        private void HideUi_Pressed(object sender, EventArgs args)
+        {
+            ToggleExtraWidgets(false);
+        }
+
         private void ManageUserProfiles_Pressed(object sender, EventArgs args)
         {
             UserProfilesManagerWindow userProfilesManagerWindow = new UserProfilesManagerWindow(_accountManager, _contentManager, _virtualFileSystem);

Ryujinx/Ui/MainWindow.glade

@@ -6,6 +6,7 @@
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">Ryujinx</property>
     <property name="window_position">center</property>
+    <signal name="key-release-event" handler="Focus_Menu_Bar" swapped="no" />
     <child>
       <object class="GtkBox" id="_box">
         <property name="visible">True</property>
@@ -14,7 +15,7 @@
         <child>
           <object class="GtkMenuBar" id="_menuBar">
             <property name="visible">True</property>
-            <property name="can_focus">False</property>
+            <property name="can_focus">True</property>
             <child>
               <object class="GtkMenuItem" id="_fileMenu">
                 <property name="visible">True</property>
@@ -338,6 +339,15 @@
                         <signal name="activate" handler="Take_Screenshot" swapped="no"/>
                       </object>
                     </child>
+                    <child>
+                      <object class="GtkMenuItem" id="_hideUi">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Hide UI (Alt to show)</property>
+                        <property name="use_underline">True</property>
+                        <signal name="activate" handler="HideUi_Pressed" swapped="no" />
+                      </object>
+                    </child>
                   </object>
                 </child>
               </object>