Add cl_hide_menu_bar console flag (#120)

* add cl_hide_menu_bar console flag

Signed-off-by: Mateusz Żak <[email protected]>

Author: zakmat

Gems/ImGuiProvider/Code/Source/Clients/ImGuiProviderSystemComponent.cpp

@@ -2,6 +2,7 @@
 #include "ImGuiProviderSystemComponent.h"
 #include <Atom/Feature/ImGui/SystemBus.h>
 #include <AzCore/Component/EntityId.h>
+#include <AzCore/Console/IConsole.h>
 #include <AzCore/Debug/Trace.h>
 #include <AzCore/base.h>
 #include <AzCore/std/algorithm.h>
@@ -12,6 +13,7 @@
 #include <AzCore/std/utility/pair.h>
 #include <AzFramework/Viewport/ViewportBus.h>
 #include <ImGui/ImGuiPass.h>
+
 #include <ImGuiBus.h>
 #include <ImGuiProvider/ImGuiProviderBus.h>
 #include <ImGuiProvider/ImGuiProviderTypeIds.h>
@@ -23,6 +25,8 @@
 namespace ImGuiProvider
 {
 
+    AZ_CVAR(bool, cl_hide_menu_bar, false, nullptr, AZ::ConsoleFunctorFlags::Null, "Hide Menu Bar if the flag is enabled");
+
     AZ_COMPONENT_IMPL(ImGuiProviderSystemComponent, "ImGuiProviderSystemComponent", ImGuiProviderSystemComponentTypeId);
 
     void ImGuiProviderSystemComponent::Reflect(AZ::ReflectContext* context)
@@ -77,14 +81,23 @@ namespace ImGuiProvider
         AZ::ComponentApplicationBus::Broadcast(&AZ::ComponentApplicationBus::Events::QueryApplicationType, appType);
         m_appInEditor = appType.IsEditor();
 
-        ImGuiProviderRequestBus::Handler::BusConnect();
-        AZ::TickBus::Handler::BusConnect();
+        if (!cl_hide_menu_bar)
+        {
+            ImGuiProviderRequestBus::Handler::BusConnect();
+            AZ::TickBus::Handler::BusConnect();
+        }
     }
 
     void ImGuiProviderSystemComponent::Deactivate()
     {
-        AZ::TickBus::Handler::BusDisconnect();
-        ImGuiProviderRequestBus::Handler::BusDisconnect();
+        if (AZ::TickBus::Handler::BusIsConnected())
+        {
+            AZ::TickBus::Handler::BusDisconnect();
+        }
+        if (ImGuiProviderRequestBus::Handler::BusIsConnected())
+        {
+            ImGuiProviderRequestBus::Handler::BusDisconnect();
+        }
         AZStd::vector<ImGuiFeaturePath> features;
         for (auto& feature : m_registeredFeatures)
         {

readme.md

@@ -382,6 +382,10 @@ This gem adds support for displaying user defined ImGui GUI. Users can define th
 
 Below example on how to register new feature during component activation:
 
+Visibility of the GUI menu bar can be overridden at the app start using `-cl_hide_menu_bar=1`.
+Setting the flag effectively disables the GUI.
+
+
 ```cpp
 void ExampleComponent::Activate()
 {