Restore grid and angle snapping (#640)

Restore grid and angle snapping (LYN-3367)

Code/Sandbox/Editor/EditorViewportWidget.h

@@ -65,6 +65,23 @@ namespace AzToolsFramework
     class ManipulatorManager;
 }
 
+class EditorViewportWidget;
+
+//! Viewport settings for the EditorViewportWidget
+struct EditorViewportSettings : public AzToolsFramework::ViewportInteraction::ViewportSettings
+{
+    explicit EditorViewportSettings(const EditorViewportWidget* editorViewportWidget);
+
+    bool GridSnappingEnabled() const override;
+    float GridSize() const override;
+    bool ShowGrid() const override;
+    bool AngleSnappingEnabled() const override;
+    float AngleStep() const override;
+
+private:
+    const EditorViewportWidget* m_editorViewportWidget = nullptr;
+};
+
 // EditorViewportWidget window
 AZ_PUSH_DISABLE_DLL_EXPORT_BASECLASS_WARNING
 AZ_PUSH_DISABLE_DLL_EXPORT_MEMBER_WARNING
@@ -189,13 +206,7 @@ public:
     virtual void OnStartPlayInEditor();
     virtual void OnStopPlayInEditor();
 
-    // AzToolsFramework::ViewportInteractionRequestBus
     AzFramework::CameraState GetCameraState();
-    bool GridSnappingEnabled();
-    float GridSize();
-    bool ShowGrid();
-    bool AngleSnappingEnabled();
-    float AngleStep();
     AzFramework::ScreenPoint ViewportWorldToScreen(const AZ::Vector3& worldPosition);
 
     // AzToolsFramework::ViewportFreezeRequestBus
@@ -596,5 +607,7 @@ private:
 
     AZ::Name m_defaultViewportContextName;
 
+    EditorViewportSettings m_editorViewportSettings;
+
     AZ_POP_DISABLE_DLL_EXPORT_MEMBER_WARNING
 };