Merge branch 'upstream/development' into LYN-6769_TestingRPCs

Code/Framework/AzCore/AzCore/Component/ComponentApplication.cpp

@@ -486,9 +486,11 @@ namespace AZ
 
         // Merge Command Line arguments
         constexpr bool executeRegDumpCommands = false;
-        SettingsRegistryMergeUtils::MergeSettingsToRegistry_CommandLine(*m_settingsRegistry, m_commandLine, executeRegDumpCommands);
 
+#if defined(AZ_DEBUG_BUILD) || defined(AZ_PROFILE_BUILD)
+        // Skip over merging the User Registry in non-debug and profile configurations
         SettingsRegistryMergeUtils::MergeSettingsToRegistry_O3deUserRegistry(*m_settingsRegistry, AZ_TRAIT_OS_PLATFORM_CODENAME, {});
+#endif
         SettingsRegistryMergeUtils::MergeSettingsToRegistry_CommandLine(*m_settingsRegistry, m_commandLine, executeRegDumpCommands);
         SettingsRegistryMergeUtils::MergeSettingsToRegistry_AddRuntimeFilePaths(*m_settingsRegistry);
 

Code/Framework/AzCore/AzCore/Settings/SettingsRegistryConsoleUtils.h

@@ -23,7 +23,7 @@ namespace AZ::SettingsRegistryConsoleUtils
     inline constexpr const char* SettingsRegistryRemove = "sr_regremove";
     inline constexpr const char* SettingsRegistryDump = "sr_regdump";
     inline constexpr const char* SettingsRegistryDumpAll = "sr_regdumpall";
-    inline constexpr const char* SettingsRegistryMergeFile = "sr_regset-file";
+    inline constexpr const char* SettingsRegistryMergeFile = "sr_regset_file";
 
     // RAII structure which owns the instances of the Settings Registry Console commands
     // registered with an AZ Console
@@ -53,7 +53,7 @@ namespace AZ::SettingsRegistryConsoleUtils
     //! "sr_regdumpall" accepts 0 arguments and dumps the entire settings registry
     //!  NOTE: this might result in a large amount of output to the console
     //!
-    //! "sr_regset-file" accepts 1 or 2 arguments - <file-path> [<anchor json path>]
+    //! "sr_regset_file" accepts 1 or 2 arguments - <file-path> [<anchor json path>]
     //!  Merges the json formatted file <file path> into the settings registry underneath the root anchor ""
     //!  or <anchor json path> if supplied
     [[nodiscard]] ConsoleFunctorHandle RegisterAzConsoleCommands(SettingsRegistryInterface& registry, AZ::IConsole& azConsole);

Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.cpp

@@ -12,13 +12,57 @@
 
 namespace AzFramework::Terrain
 {
+    // Create a handler that can be accessed from Python scripts to receive terrain change notifications.
+    class TerrainDataNotificationHandler final
+        : public AzFramework::Terrain::TerrainDataNotificationBus::Handler
+        , public AZ::BehaviorEBusHandler
+    {
+    public:
+        AZ_EBUS_BEHAVIOR_BINDER(
+            TerrainDataNotificationHandler,
+            "{A83EF103-295A-4653-8279-F30FBF3F9037}",
+            AZ::SystemAllocator,
+            OnTerrainDataCreateBegin,
+            OnTerrainDataCreateEnd,
+            OnTerrainDataDestroyBegin,
+            OnTerrainDataDestroyEnd,
+            OnTerrainDataChanged);
+
+        void OnTerrainDataCreateBegin() override
+        {
+            Call(FN_OnTerrainDataCreateBegin);
+        }
+
+        void OnTerrainDataCreateEnd() override
+        {
+            Call(FN_OnTerrainDataCreateEnd);
+        }
+
+        void OnTerrainDataDestroyBegin() override
+        {
+            Call(FN_OnTerrainDataDestroyBegin);
+        }
+
+        void OnTerrainDataDestroyEnd() override
+        {
+            Call(FN_OnTerrainDataDestroyEnd);
+        }
+
+        void OnTerrainDataChanged(
+            const AZ::Aabb& dirtyRegion, AzFramework::Terrain::TerrainDataNotifications::TerrainDataChangedMask dataChangedMask) override
+        {
+            Call(FN_OnTerrainDataChanged, dirtyRegion, dataChangedMask);
+        }
+    };
+
     void TerrainDataRequests::Reflect(AZ::ReflectContext* context)
     {
         if (AZ::BehaviorContext* behaviorContext = azrtti_cast<AZ::BehaviorContext*>(context))
         {
             behaviorContext->EBus<AzFramework::Terrain::TerrainDataRequestBus>("TerrainDataRequestBus")
+                ->Attribute(AZ::Script::Attributes::Scope, AZ::Script::Attributes::ScopeFlags::Common)
                 ->Attribute(AZ::Script::Attributes::Category, "Terrain")
-                ->Event("GetHeight", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetHeight)
+                ->Attribute(AZ::Script::Attributes::Module, "terrain")
                 ->Event("GetNormal", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetNormal)
                 ->Event("GetMaxSurfaceWeight", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetMaxSurfaceWeight)
                 ->Event("GetMaxSurfaceWeightFromVector2",
@@ -34,8 +78,24 @@ namespace AzFramework::Terrain
                 ->Event("GetTerrainAabb", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetTerrainAabb)
                 ->Event("GetTerrainHeightQueryResolution",
                     &AzFramework::Terrain::TerrainDataRequestBus::Events::GetTerrainHeightQueryResolution)
+                ->Event("GetHeight", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetHeightVal)
+                ->Event("GetHeightFromVector2", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetHeightValFromVector2)
+                ->Event("GetHeightFromFloats", &AzFramework::Terrain::TerrainDataRequestBus::Events::GetHeightValFromFloats)
                 ;
+
+            behaviorContext->EBus<AzFramework::Terrain::TerrainDataNotificationBus>("TerrainDataNotificationBus")
+                ->Attribute(AZ::Script::Attributes::Scope, AZ::Script::Attributes::ScopeFlags::Common)
+                ->Attribute(AZ::Script::Attributes::Category, "Terrain")
+                ->Attribute(AZ::Script::Attributes::Module, "terrain")
+                ->Event("OnTerrainDataCreateBegin", &AzFramework::Terrain::TerrainDataNotifications::OnTerrainDataCreateBegin)
+                ->Event("OnTerrainDataCreateEnd", &AzFramework::Terrain::TerrainDataNotifications::OnTerrainDataCreateEnd)
+                ->Event("OnTerrainDataDestroyBegin", &AzFramework::Terrain::TerrainDataNotifications::OnTerrainDataDestroyBegin)
+                ->Event("OnTerrainDataDestroyEnd", &AzFramework::Terrain::TerrainDataNotifications::OnTerrainDataDestroyEnd)
+                ->Event("OnTerrainDataChanged", &AzFramework::Terrain::TerrainDataNotifications::OnTerrainDataChanged)
+                ->Handler<AzFramework::Terrain::TerrainDataNotificationHandler>()
+            ;
         }
 
+        //TerrainDataNotificationHandler::Reflect(context);
     }
 } // namespace AzFramework::Terrain

Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.h

@@ -144,13 +144,31 @@ namespace AzFramework
                 return result;
             }
             SurfaceData::SurfacePoint BehaviorContextGetSurfacePointFromVector2(
-                const AZ::Vector2& inPosition,
-                Sampler sampleFilter = Sampler::DEFAULT) const
+                const AZ::Vector2& inPosition, Sampler sampleFilter = Sampler::DEFAULT) const
             {
                 SurfaceData::SurfacePoint result;
                 GetSurfacePointFromVector2(inPosition, result, sampleFilter);
                 return result;
             }
+                
+            // Functions without the optional bool* parameter that can be used from Python tests.
+            float GetHeightVal(AZ::Vector3 position, Sampler sampler = Sampler::BILINEAR) const
+            {
+                bool terrainExists;
+                return GetHeight(position, sampler, &terrainExists);
+            }
+
+            float GetHeightValFromVector2(AZ::Vector2 position, Sampler sampler = Sampler::BILINEAR) const
+            {
+                bool terrainExists;
+                return GetHeightFromVector2(position, sampler, &terrainExists);
+            }
+
+            float GetHeightValFromFloats(float x, float y, Sampler sampler = Sampler::BILINEAR) const
+            {
+                bool terrainExists;
+                return GetHeightFromFloats(x, y, sampler, &terrainExists);
+            }
         };
         using TerrainDataRequestBus = AZ::EBus<TerrainDataRequests>;
 

Code/Framework/AzFramework/Platform/Common/Xcb/AzFramework/XcbInputDeviceKeyboard.h

@@ -5,6 +5,7 @@
  * SPDX-License-Identifier: Apache-2.0 OR MIT
  *
  */
+#pragma once
 
 #include <AzFramework/Input/Devices/Keyboard/InputDeviceKeyboard.h>
 #include <AzFramework/XcbEventHandler.h>

Code/Framework/AzFramework/Tests/InputTests.cpp

@@ -29,6 +29,13 @@ namespace InputUnitTests
     ////////////////////////////////////////////////////////////////////////////////////////////////
     class InputTest : public ScopedAllocatorSetupFixture
     {
+    public:
+        InputTest() : ScopedAllocatorSetupFixture()
+        {
+            // Many input tests are only valid if the GamePad device is supported on this platform.
+            m_gamepadSupported = InputDeviceGamepad::GetMaxSupportedGamepads() > 0;
+        }
+
     protected:
         ////////////////////////////////////////////////////////////////////////////////////////////
         void SetUp() override
@@ -46,6 +53,7 @@ namespace InputUnitTests
         
         ////////////////////////////////////////////////////////////////////////////////////////////
         AZStd::unique_ptr<InputSystemComponent> m_inputSystemComponent;
+        bool m_gamepadSupported;
     };
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
@@ -78,12 +86,17 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputContext_ActivateDeactivate_Successfull)
-#else
     TEST_F(InputTest, InputContext_ActivateDeactivate_Successfull)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputContext_ActivateDeactivate_Successfull";
+        #else
+            SUCCEED() << "Skipping test InputContext_ActivateDeactivate_Successfull";
+        #endif
+            return;
+        }
         // Create an input context (they are inactive by default).
         InputContext inputContext("TestInputContext");
 
@@ -148,12 +161,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputContext_AddRemoveInputMapping_Successfull)
-#else
     TEST_F(InputTest, InputContext_AddRemoveInputMapping_Successfull)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputContext_AddRemoveInputMapping_Successfull";
+        #else
+            SUCCEED() << "Skipping test InputContext_AddRemoveInputMapping_Successfull";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -256,12 +275,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputContext_ConsumeProcessedInput_Consumed)
-#else
     TEST_F(InputTest, InputContext_ConsumeProcessedInput_Consumed)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputContext_ConsumeProcessedInput_Consumed";
+        #else
+            SUCCEED() << "Skipping test InputContext_ConsumeProcessedInput_Consumed";
+        #endif
+            return;
+        }
+
         InputContext::InitData initData;
 
         // Create a high priority input context that consumes input processed by any of its mappings.
@@ -340,12 +365,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputContext_FilteredInput_Mapped)
-#else
     TEST_F(InputTest, InputContext_FilteredInput_Mapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputContext_FilteredInput_Mapped";
+        #else
+            SUCCEED() << "Skipping test InputContext_FilteredInput_Mapped";
+        #endif
+            return;
+        }
+
         // Create an input context that initially only listens for keyboard input.
         InputContext::InitData initData;
         initData.autoActivate = true;
@@ -413,12 +444,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingOr_AddRemoveSourceInput_Successful)
-#else
     TEST_F(InputTest, InputMappingOr_AddRemoveSourceInput_Successful)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingOr_AddRemoveSourceInput_Successful";
+        #else
+            SUCCEED() << "Skipping test InputMappingOr_AddRemoveSourceInput_Successful";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -491,12 +528,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingOr_SingleSourceInput_Mapped)
-#else
     TEST_F(InputTest, InputMappingOr_SingleSourceInput_Mapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingOr_SingleSourceInput_Mapped";
+        #else
+            SUCCEED() << "Skipping test InputMappingOr_SingleSourceInput_Mapped";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -558,12 +601,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingOr_MultipleSourceInputs_Mapped)
-#else
     TEST_F(InputTest, InputMappingOr_MultipleSourceInputs_Mapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingOr_MultipleSourceInputs_Mapped";
+        #else
+            SUCCEED() << "Skipping test InputMappingOr_MultipleSourceInputs_Mapped";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -650,12 +699,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingAnd_AddRemoveSourceInput_Successful)
-#else
     TEST_F(InputTest, InputMappingAnd_AddRemoveSourceInput_Successful)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingAnd_AddRemoveSourceInput_Successful";
+        #else
+            SUCCEED() << "Skipping test InputMappingAnd_AddRemoveSourceInput_Successful";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -728,12 +783,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingAnd_SingleSourceInput_Mapped)
-#else
     TEST_F(InputTest, InputMappingAnd_SingleSourceInput_Mapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingAnd_SingleSourceInput_Mapped";
+        #else
+            SUCCEED() << "Skipping test InputMappingAnd_SingleSourceInput_Mapped";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -795,12 +856,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingAnd_MultipleSourceInputs_Mapped)
-#else
     TEST_F(InputTest, InputMappingAnd_MultipleSourceInputs_Mapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingAnd_MultipleSourceInputs_Mapped";
+        #else
+            SUCCEED() << "Skipping test InputMappingAnd_MultipleSourceInputs_Mapped";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -909,12 +976,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingAnd_MultipleSourceInputsWithDifferentValues_ValuesAveraged)
-#else
     TEST_F(InputTest, InputMappingAnd_MultipleSourceInputsWithDifferentValues_ValuesAveraged)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingAnd_MultipleSourceInputsWithDifferentValues_ValuesAveraged";
+        #else
+            SUCCEED() << "Skipping test InputMappingAnd_MultipleSourceInputsWithDifferentValues_ValuesAveraged";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();
@@ -969,12 +1042,18 @@ namespace InputUnitTests
     }
 
     ////////////////////////////////////////////////////////////////////////////////////////////////
-#if AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
-    TEST_F(InputTest, DISABLED_InputMappingAnd_MultipleSourceInputsFromTheSameInputDeviceTypeWithDifferentIndicies_NotMapped)
-#else
     TEST_F(InputTest, InputMappingAnd_MultipleSourceInputsFromTheSameInputDeviceTypeWithDifferentIndicies_NotMapped)
-#endif // AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS
     {
+        if (!m_gamepadSupported)
+        {
+        #if defined(GTEST_SKIP)
+            GTEST_SKIP() << "Skipping test InputMappingAnd_MultipleSourceInputsFromTheSameInputDeviceTypeWithDifferentIndicies_NotMapped";
+        #else
+            SUCCEED() << "Skipping test InputMappingAnd_MultipleSourceInputsFromTheSameInputDeviceTypeWithDifferentIndicies_NotMapped";
+        #endif
+            return;
+        }
+
         // Create an input context and activate it.
         InputContext inputContext("TestInputContext");
         inputContext.Activate();

Code/Framework/AzQtComponents/AzQtComponents/Components/FancyDocking.cpp

@@ -53,7 +53,6 @@ static void OptimizedSetParent(QWidget* widget, QWidget* parent)
 
 namespace AzQtComponents
 {
-    static const FancyDockingDropZoneConstants g_FancyDockingConstants;
 
     // Constant for the threshold in pixels for snapping to edges while dragging for docking
     static const int g_snapThresholdInPixels = 15;
@@ -155,7 +154,7 @@ namespace AzQtComponents
 
         // Timer for updating our hovered drop zone opacity
         QObject::connect(m_dropZoneHoverFadeInTimer, &QTimer::timeout, this, &FancyDocking::onDropZoneHoverFadeInUpdate);
-        m_dropZoneHoverFadeInTimer->setInterval(g_FancyDockingConstants.dropZoneHoverFadeUpdateIntervalMS);
+        m_dropZoneHoverFadeInTimer->setInterval(FancyDockingDropZoneConstants::dropZoneHoverFadeUpdateIntervalMS);
         QIcon dragIcon = QIcon(QStringLiteral(":/Cursors/Grabbing.svg"));
         m_dragCursor = QCursor(dragIcon.pixmap(16), 5, 2);
     }
@@ -333,13 +332,13 @@ namespace AzQtComponents
      */
     void FancyDocking::onDropZoneHoverFadeInUpdate()
     {
-        const qreal dropZoneHoverOpacity = g_FancyDockingConstants.dropZoneHoverFadeIncrement + m_dropZoneState.dropZoneHoverOpacity();
+        const qreal dropZoneHoverOpacity = FancyDockingDropZoneConstants::dropZoneHoverFadeIncrement + m_dropZoneState.dropZoneHoverOpacity();
 
         // Once we've reached the full drop zone opacity, cut it off in case we
         // went over and stop the timer
-        if (dropZoneHoverOpacity >= g_FancyDockingConstants.dropZoneOpacity)
+        if (dropZoneHoverOpacity >= FancyDockingDropZoneConstants::dropZoneOpacity)
         {
-            m_dropZoneState.setDropZoneHoverOpacity(g_FancyDockingConstants.dropZoneOpacity);
+            m_dropZoneState.setDropZoneHoverOpacity(FancyDockingDropZoneConstants::dropZoneOpacity);
             m_dropZoneHoverFadeInTimer->stop();
         }
         else
@@ -792,12 +791,12 @@ namespace AzQtComponents
         QPoint mainWindowTopLeft = multiscreenMapFromGlobal(mainWindow->mapToGlobal(mainWindowRect.topLeft()));
         QPoint mainWindowTopRight = multiscreenMapFromGlobal(mainWindow->mapToGlobal(mainWindowRect.topRight()));
         QPoint mainWindowBottomLeft = multiscreenMapFromGlobal(mainWindow->mapToGlobal(mainWindowRect.bottomLeft()));
-        QSize absoluteLeftRightSize(g_FancyDockingConstants.absoluteDropZoneSizeInPixels, mainWindowRect.height());
+        QSize absoluteLeftRightSize(FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels, mainWindowRect.height());
         QRect absoluteLeftDropZone(mainWindowTopLeft, absoluteLeftRightSize);
-        QRect absoluteRightDropZone(mainWindowTopRight - QPoint(g_FancyDockingConstants.absoluteDropZoneSizeInPixels, 0), absoluteLeftRightSize);
-        QSize absoluteTopBottomSize(mainWindowRect.width(), g_FancyDockingConstants.absoluteDropZoneSizeInPixels);
+        QRect absoluteRightDropZone(mainWindowTopRight - QPoint(FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels, 0), absoluteLeftRightSize);
+        QSize absoluteTopBottomSize(mainWindowRect.width(), FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels);
         QRect absoluteTopDropZone(mainWindowTopLeft, absoluteTopBottomSize);
-        QRect absoluteBottomDropZone(mainWindowBottomLeft - QPoint(0, g_FancyDockingConstants.absoluteDropZoneSizeInPixels), absoluteTopBottomSize);
+        QRect absoluteBottomDropZone(mainWindowBottomLeft - QPoint(0, FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels), absoluteTopBottomSize);
 
         // If the drop target is a main window, then we will only show the absolute
         // drop zone if the cursor is in that zone already
@@ -986,16 +985,16 @@ namespace AzQtComponents
         switch (m_dropZoneState.absoluteDropZoneArea())
         {
         case Qt::LeftDockWidgetArea:
-            dockRect.setX(dockRect.x() + g_FancyDockingConstants.absoluteDropZoneSizeInPixels);
+            dockRect.setX(dockRect.x() + FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels);
             break;
         case Qt::RightDockWidgetArea:
-            dockRect.setWidth(dockRect.width() - g_FancyDockingConstants.absoluteDropZoneSizeInPixels);
+            dockRect.setWidth(dockRect.width() - FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels);
             break;
         case Qt::TopDockWidgetArea:
-            dockRect.setY(dockRect.y() + g_FancyDockingConstants.absoluteDropZoneSizeInPixels);
+            dockRect.setY(dockRect.y() + FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels);
             break;
         case Qt::BottomDockWidgetArea:
-            dockRect.setHeight(dockRect.height() - g_FancyDockingConstants.absoluteDropZoneSizeInPixels);
+            dockRect.setHeight(dockRect.height() - FancyDockingDropZoneConstants::absoluteDropZoneSizeInPixels);
             break;
         }
 
@@ -1034,15 +1033,15 @@ namespace AzQtComponents
         // Set the drop zone width/height to the default, but if the dock widget
         // width and/or height is below the threshold, then switch to scaling them
         // down accordingly
-        int dropZoneWidth = g_FancyDockingConstants.dropZoneSizeInPixels;
-        if (dockWidth < g_FancyDockingConstants.minDockSizeBeforeDropZoneScalingInPixels)
+        int dropZoneWidth = FancyDockingDropZoneConstants::dropZoneSizeInPixels;
+        if (dockWidth < FancyDockingDropZoneConstants::minDockSizeBeforeDropZoneScalingInPixels)
         {
-            dropZoneWidth = aznumeric_cast<int>(dockWidth * g_FancyDockingConstants.dropZoneScaleFactor);
+            dropZoneWidth = aznumeric_cast<int>(dockWidth * FancyDockingDropZoneConstants::dropZoneScaleFactor);
         }
-        int dropZoneHeight = g_FancyDockingConstants.dropZoneSizeInPixels;
-        if (dockHeight < g_FancyDockingConstants.minDockSizeBeforeDropZoneScalingInPixels)
+        int dropZoneHeight = FancyDockingDropZoneConstants::dropZoneSizeInPixels;
+        if (dockHeight < FancyDockingDropZoneConstants::minDockSizeBeforeDropZoneScalingInPixels)
         {
-            dropZoneHeight = aznumeric_cast<int>(dockHeight * g_FancyDockingConstants.dropZoneScaleFactor);
+            dropZoneHeight = aznumeric_cast<int>(dockHeight * FancyDockingDropZoneConstants::dropZoneScaleFactor);
         }
 
         // Calculate the inner corners to be used when constructing the drop zone polygons
@@ -1078,7 +1077,7 @@ namespace AzQtComponents
         int innerDropZoneWidth = m_dropZoneState.innerDropZoneRect().width();
         int innerDropZoneHeight = m_dropZoneState.innerDropZoneRect().height();
         int centerDropZoneDiameter = (innerDropZoneWidth < innerDropZoneHeight) ? innerDropZoneWidth : innerDropZoneHeight;
-        centerDropZoneDiameter = aznumeric_cast<int>(centerDropZoneDiameter * g_FancyDockingConstants.centerTabDropZoneScale);
+        centerDropZoneDiameter = aznumeric_cast<int>(centerDropZoneDiameter * FancyDockingDropZoneConstants::centerTabDropZoneScale);
 
         // Setup our center tab drop zone
         const QSize centerDropZoneSize(centerDropZoneDiameter, centerDropZoneDiameter);
@@ -1986,7 +1985,7 @@ namespace AzQtComponents
             // hasn't faded in all the way yet, then ignore the drop zone area
             // which will make the widget floating
             bool modifiedKeyPressed = FancyDockingDropZoneWidget::CheckModifierKey();
-            if (modifiedKeyPressed || m_dropZoneState.dropZoneHoverOpacity() != g_FancyDockingConstants.dropZoneOpacity)
+            if (modifiedKeyPressed || m_dropZoneState.dropZoneHoverOpacity() != FancyDockingDropZoneConstants::dropZoneOpacity)
             {
                 area = Qt::NoDockWidgetArea;
             }
@@ -3026,7 +3025,7 @@ namespace AzQtComponents
         {
             bool modifiedKeyPressed = FancyDockingDropZoneWidget::CheckModifierKey();
 
-            m_ghostWidget->setWindowOpacity(modifiedKeyPressed ? 1.0f : g_FancyDockingConstants.draggingDockWidgetOpacity);
+            m_ghostWidget->setWindowOpacity(modifiedKeyPressed ? 1.0f : FancyDockingDropZoneConstants::draggingDockWidgetOpacity);
             m_ghostWidget->setPixmap(m_state.dockWidgetScreenGrab.screenGrab, m_state.placeholder(), m_state.placeholderScreen());
         }
     }

Code/Framework/AzQtComponents/AzQtComponents/Components/FancyDockingDropZoneWidget.cpp

@@ -19,26 +19,6 @@
 
 namespace AzQtComponents
 {
-    static const FancyDockingDropZoneConstants g_Constants;
-
-    FancyDockingDropZoneConstants::FancyDockingDropZoneConstants()
-    {
-        draggingDockWidgetOpacity = 0.6;
-        dropZoneOpacity = 0.4;
-        dropZoneSizeInPixels = 40;
-        minDockSizeBeforeDropZoneScalingInPixels = dropZoneSizeInPixels * 3;
-        dropZoneScaleFactor = 0.25;
-        centerTabDropZoneScale = 0.5;
-        centerTabIconScale = 0.5;
-        dropZoneColor = QColor(155, 155, 155);
-        dropZoneBorderColor = Qt::black;
-        dropZoneBorderInPixels = 1;
-        absoluteDropZoneSizeInPixels = 25;
-        dockingTargetDelayMS = 110;
-        dropZoneHoverFadeUpdateIntervalMS = 20;
-        dropZoneHoverFadeIncrement = dropZoneOpacity / (dockingTargetDelayMS / dropZoneHoverFadeUpdateIntervalMS);
-        centerDropZoneIconPath = QString(":/stylesheet/img/UI20/docking/tabs_icon.svg");
-    }
 
     FancyDockingDropZoneWidget::FancyDockingDropZoneWidget(QMainWindow* mainWindow, QWidget* coordinatesRelativeTo, QScreen* screen, FancyDockingDropZoneState* dropZoneState)
         // NOTE: this will not work with multiple monitors if this widget has a parent. The floating drop zone
@@ -154,7 +134,7 @@ namespace AzQtComponents
 
             // Draw all of the normal drop zones if they exist (if a dock widget is hovered over)
             painter.setPen(Qt::NoPen);
-            painter.setOpacity(g_Constants.dropZoneOpacity);
+            painter.setOpacity(FancyDockingDropZoneConstants::dropZoneOpacity);
             auto dropZones = m_dropZoneState->dropZones();
             for (auto it = dropZones.cbegin(); it != dropZones.cend(); ++it)
             {
@@ -189,7 +169,7 @@ namespace AzQtComponents
         // Otherwise, set the normal color
         else
         {
-            painter.setBrush(g_Constants.dropZoneColor);
+            painter.setBrush(FancyDockingDropZoneConstants::dropZoneColor);
         }
 
         // negate the window position to offset everything by that much
@@ -214,8 +194,8 @@ namespace AzQtComponents
             // Scale the tabs icon based on the drop zone size and our specified offset
             // Doing this through QIcon to make sure that SVG is rendered already in desired resolution
             const QSize& dropZoneSize = dropZoneRect.size();
-            const QSize requestedIconSize = dropZoneSize * g_Constants.centerTabIconScale;
-            const QIcon dropZoneIcon = QIcon(g_Constants.centerDropZoneIconPath);
+            const QSize requestedIconSize = dropZoneSize * FancyDockingDropZoneConstants::centerTabIconScale;
+            const QIcon dropZoneIcon = QIcon(FancyDockingDropZoneConstants::centerDropZoneIconPath);
             const QPixmap dropZonePixmap = dropZoneIcon.pixmap(requestedIconSize);
             const QSize receivedIconSize = dropZoneIcon.actualSize(requestedIconSize);
 
@@ -264,7 +244,7 @@ namespace AzQtComponents
             }
             else
             {
-                painter.setBrush(g_Constants.dropZoneColor);
+                painter.setBrush(FancyDockingDropZoneConstants::dropZoneColor);
             }
             painter.drawRect(absoluteDropZoneRect);
 
@@ -313,8 +293,8 @@ namespace AzQtComponents
         const QPoint innerBottomRight = innerDropZoneRect.bottomRight();
 
         // Draw the lines using the appropriate pen
-        QPen dropZoneBorderPen(g_Constants.dropZoneBorderColor);
-        dropZoneBorderPen.setWidth(g_Constants.dropZoneBorderInPixels);
+        QPen dropZoneBorderPen(FancyDockingDropZoneConstants::dropZoneBorderColor);
+        dropZoneBorderPen.setWidth(FancyDockingDropZoneConstants::dropZoneBorderInPixels);
         painter.setPen(dropZoneBorderPen);
         painter.setOpacity(1);
         painter.drawLine(topLeft, innerTopLeft);

Code/Framework/AzQtComponents/AzQtComponents/Components/FancyDockingDropZoneWidget.h

@@ -28,63 +28,58 @@ class QPainter;
 
 namespace AzQtComponents
 {
-    struct AZ_QT_COMPONENTS_API FancyDockingDropZoneConstants
+    namespace FancyDockingDropZoneConstants
     {
         // Constant for the opacity of the screen grab for the dock widget being dragged
-        qreal draggingDockWidgetOpacity;
+        static constexpr qreal draggingDockWidgetOpacity = 0.6;
 
         // Constant for the opacity of the normal drop zones
-        qreal dropZoneOpacity;
+        static constexpr qreal dropZoneOpacity  = 0.4;
 
         // Constant for the default drop zone size (in pixels)
-        int dropZoneSizeInPixels;
+        static constexpr int dropZoneSizeInPixels  = 40;
 
         // Constant for the dock width/height size (in pixels) before we need to start
         // scaling down the drop zone sizes, or else they will overlap with the center
         // tab icon or each other
-        int minDockSizeBeforeDropZoneScalingInPixels;
+        static constexpr int minDockSizeBeforeDropZoneScalingInPixels = dropZoneSizeInPixels * 3;
 
         // Constant for the factor by which we must scale down the drop zone sizes once
         // the dock width/height size is too small
-        qreal dropZoneScaleFactor;
+        static constexpr qreal dropZoneScaleFactor  = 0.25;
 
         // Constant for the percentage to scale down the inner drop zone rectangle for the center tab drop zone
-        qreal centerTabDropZoneScale;
+        static constexpr qreal centerTabDropZoneScale  = 0.5;
 
         // Constant for the percentage to scale down the center tab drop zone for the center tab icon
-        qreal centerTabIconScale;
+        static constexpr qreal centerTabIconScale  = 0.5;
 
         // Constant for the drop zone hotspot default color
-        QColor dropZoneColor;
+        static const QColor dropZoneColor = QColor(155, 155, 155);
 
         // Constant for the drop zone border color
-        QColor dropZoneBorderColor;
+        static const QColor dropZoneBorderColor = Qt::black;
 
         // Constant for the border width in pixels separating the drop zones
-        int dropZoneBorderInPixels;
+        static constexpr int dropZoneBorderInPixels  = 1;
 
         // Constant for the border width in pixels separating the drop zones
-        int absoluteDropZoneSizeInPixels;
+        static constexpr int absoluteDropZoneSizeInPixels  = 25;
 
         // Constant for the delay (in milliseconds) before a drop zone becomes active
         // once it is hovered over
-        int dockingTargetDelayMS;
+        static constexpr int dockingTargetDelayMS = 110;
 
         // Constant for the rate at which we will update (fade in) the drop zone opacity
         // when hovered over (in milliseconds)
-        int dropZoneHoverFadeUpdateIntervalMS;
+        static constexpr int dropZoneHoverFadeUpdateIntervalMS  = 20;
 
         // Constant for the incremental opacity increase for the hovered drop zone
         // that will fade in to the full drop zone opacity in the desired time
-        qreal dropZoneHoverFadeIncrement;
+        static constexpr qreal dropZoneHoverFadeIncrement = dropZoneOpacity / (dockingTargetDelayMS / dropZoneHoverFadeUpdateIntervalMS);
 
         // Constant for the path to the center drop zone tabs icon
-        QString centerDropZoneIconPath;
-
-        FancyDockingDropZoneConstants();
-
-        FancyDockingDropZoneConstants(const FancyDockingDropZoneConstants&) = delete;
-        FancyDockingDropZoneConstants& operator=(const FancyDockingDropZoneConstants&) = delete;
+        static const QString centerDropZoneIconPath = QStringLiteral(":/stylesheet/img/UI20/docking/tabs_icon.svg");
     };
 
     class FancyDockingDropZoneState

Code/Framework/AzQtComponents/AzQtComponents/Components/Widgets/ColorPicker/ColorController.cpp

@@ -323,7 +323,7 @@ namespace AzQtComponents
                     saturation *= 2.0 - lightness;
                 }
                 double value = (lightness + saturation) / 2.0;
-                saturation = (2.0 * saturation) / (lightness + saturation);
+                saturation = qFuzzyIsNull(lightness + saturation) ? 0 : (2.0 * saturation) / (lightness + saturation);
 
                 m_hsv.saturation = AZ::GetClamp(saturation, 0.0, 1.0);
                 m_hsv.value = AZ::GetClamp(value, 0.0, 12.5);
@@ -341,11 +341,12 @@ namespace AzQtComponents
                 double saturation = m_hsv.saturation * m_hsv.value;
                 if (lightness <= 1.0)
                 {
-                    saturation /= lightness;
+                    saturation = (qFuzzyIsNull(lightness)) ? 0.0 : saturation / lightness;
                 }
                 else
                 {
-                    saturation /= 2.0 - lightness;
+                    double two_minus_lightness = 2.0 - lightness;
+                    saturation = (qFuzzyIsNull(two_minus_lightness)) ? 0.0 : saturation / two_minus_lightness;
                 }
                 lightness /= 2.0;
 

Code/Framework/AzQtComponents/AzQtComponents/Tests/ColorControllerTests.cpp

@@ -164,11 +164,7 @@ namespace
     }
 }
 
-#if AZ_TRAIT_DISABLE_FAILED_ZERO_COLOR_CONVERSION_TEST
-TEST(AzQtComponents, DISABLED_ColorConversionsTestAllZeros)
-#else
 TEST(AzQtComponents, ColorConversionsTestAllZeros)
-#endif // AZ_TRAIT_DISABLE_FAILED_ZERO_COLOR_CONVERSION_TEST
 {
     TestConversions({ 0.0, 0.0, 0.0 }, { 0.0, 0.0, 0.0 }, { 0.0, 0.0, 0.0 });
 }

Code/Framework/AzTest/AzTest/Platform/Linux/AzTest_Traits_Linux.h

@@ -18,12 +18,11 @@
 
 #define AZ_TRAIT_DISABLE_FAILED_ATOM_RPI_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_ARCHIVE_TESTS true
-#define AZ_TRAIT_DISABLE_FAILED_ZERO_COLOR_CONVERSION_TEST true
+
 #define AZ_TRAIT_DISABLE_FAILED_FRAMEPROFILER_TEST true
 #define AZ_TRAIT_DISABLE_FAILED_FRAMEWORK_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_GRADIENT_SIGNAL_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_MULTIPLAYER_GRIDMATE_TESTS true
-#define AZ_TRAIT_DISABLE_FAILED_INPUT_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_NATIVE_WINDOWS_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_PROCESS_LAUNCHER_TESTS true
 #define AZ_TRAIT_DISABLE_FAILED_EMOTION_FX_TESTS true

Code/Framework/AzToolsFramework/AzToolsFramework/Application/ToolsApplication.cpp

@@ -30,6 +30,7 @@
 #include <AzToolsFramework/ContainerEntity/ContainerEntitySystemComponent.h>
 #include <AzToolsFramework/Entity/EditorEntityContextComponent.h>
 #include <AzToolsFramework/Entity/EditorEntityInfoBus.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntitySystemComponent.h>
 #include <AzToolsFramework/FocusMode/FocusModeSystemComponent.h>
 #include <AzToolsFramework/Slice/SliceMetadataEntityContextComponent.h>
 #include <AzToolsFramework/Prefab/PrefabSystemComponent.h>
@@ -268,6 +269,7 @@ namespace AzToolsFramework
                 azrtti_typeid<Components::EditorEntityUiSystemComponent>(),
                 azrtti_typeid<FocusModeSystemComponent>(),
                 azrtti_typeid<ContainerEntitySystemComponent>(),
+                azrtti_typeid<ReadOnlyEntitySystemComponent>(),
                 azrtti_typeid<SliceMetadataEntityContextComponent>(),
                 azrtti_typeid<Prefab::PrefabSystemComponent>(),
                 azrtti_typeid<EditorEntityFixupComponent>(),

Code/Framework/AzToolsFramework/AzToolsFramework/AzToolsFrameworkModule.cpp

@@ -23,6 +23,7 @@
 #include <AzToolsFramework/Entity/EditorEntityModelComponent.h>
 #include <AzToolsFramework/Entity/EditorEntitySearchComponent.h>
 #include <AzToolsFramework/Entity/EditorEntitySortComponent.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntitySystemComponent.h>
 #include <AzToolsFramework/FocusMode/FocusModeSystemComponent.h>
 #include <AzToolsFramework/PropertyTreeEditor/PropertyTreeEditorComponent.h>
 #include <AzToolsFramework/Render/EditorIntersectorComponent.h>
@@ -75,6 +76,7 @@ namespace AzToolsFramework
             EditorEntityFixupComponent::CreateDescriptor(),
             EntityUtilityComponent::CreateDescriptor(),
             ContainerEntitySystemComponent::CreateDescriptor(),
+            ReadOnlyEntitySystemComponent::CreateDescriptor(),
             FocusModeSystemComponent::CreateDescriptor(),
             SliceMetadataEntityContextComponent::CreateDescriptor(),
             SliceRequestComponent::CreateDescriptor(),

Code/Framework/AzToolsFramework/AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityBus.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Component/EntityId.h>
+#include <AzCore/EBus/EBus.h>
+
+#include <AzFramework/Entity/EntityContext.h>
+
+namespace AzToolsFramework
+{
+    //! Used to notify changes of state for read-only entities.
+    class ReadOnlyEntityPublicNotifications
+        : public AZ::EBusTraits
+    {
+    public:
+        //////////////////////////////////////////////////////////////////////////
+        // EBusTraits overrides
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Multiple;
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
+        using BusIdType = AzFramework::EntityContextId;
+        //////////////////////////////////////////////////////////////////////////
+        
+        //! Triggered when an entity's read-only status changes.
+        //! @param entityId The entity whose status has changed.
+        //! @param readOnly The read-only state the container was changed to.
+        virtual void OnReadOnlyEntityStatusChanged([[maybe_unused]] const AZ::EntityId& entityId, [[maybe_unused]] bool readOnly) {}
+
+    protected:
+        ~ReadOnlyEntityPublicNotifications() = default;
+    };
+    using ReadOnlyEntityPublicNotificationBus = AZ::EBus<ReadOnlyEntityPublicNotifications>;
+
+    //! Used by the ReadOnlyEntitySystemComponent to query the read-only state of entities as set by systems using the API.
+    class ReadOnlyEntityQueryRequests
+        : public AZ::EBusTraits
+    {
+    public:
+        //////////////////////////////////////////////////////////////////////////
+        // EBusTraits overrides
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Multiple;
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
+        using BusIdType = AzFramework::EntityContextId;
+        //////////////////////////////////////////////////////////////////////////
+        
+        //! Triggered when an entity's read-only status is queried.
+        //! Allows multiple systems to weigh in on the read-only status of an entity.
+        //! @param entityId The entity whose status has changed.
+        //! @param[out] isReadOnly The output of the query. Should only be changed to true, and left untouched if false.
+        virtual void IsReadOnly(const AZ::EntityId& entityId, bool& isReadOnly) = 0;
+
+    protected:
+        ~ReadOnlyEntityQueryRequests() = default;
+    };
+    using ReadOnlyEntityQueryRequestBus = AZ::EBus<ReadOnlyEntityQueryRequests>;
+
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityInterface.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Interface/Interface.h>
+#include <AzCore/Serialization/SerializeContext.h>
+
+#include <AzFramework/Entity/EntityContextBus.h>
+
+namespace AzToolsFramework
+{
+    //! An entity registered as read-only cannot be altered in the editor.
+    class ReadOnlyEntityPublicInterface
+    {
+    public:
+        AZ_RTTI(ReadOnlyEntityPublicInterface, "{921FE15B-6EBD-47F0-8238-BC63318DEDEA}");
+
+        //! Returns whether the entity id provided is registered as read-only.
+        virtual bool IsReadOnly(const AZ::EntityId& entityId) = 0;
+    };
+
+    //! An entity registered as read-only cannot be altered in the editor.
+    class ReadOnlyEntityQueryInterface
+    {
+    public:
+        AZ_RTTI(ReadOnlyEntityQueryInterface, "{2ACD63C5-1F3E-4DE8-880E-8115F857D329}");
+
+        //! Refreshes the cached read-only status for the entities provided.
+        //! @param entityIds The entityIds whose read-only state will be queried again.
+        virtual void RefreshReadOnlyState(const EntityIdList& entityIds) = 0;
+
+        //! Refreshes the cached read-only status for all entities.
+        //! Useful when disconnecting a handler at runtime.
+        virtual void RefreshReadOnlyStateForAllEntities() = 0;
+    };
+
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Entity/ReadOnly/ReadOnlyEntitySystemComponent.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntitySystemComponent.h>
+
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityBus.h>
+#include <AzToolsFramework/API/ToolsApplicationAPI.h>
+
+namespace AzToolsFramework
+{
+    void ReadOnlyEntitySystemComponent::Activate()
+    {
+        AZ::Interface<ReadOnlyEntityQueryInterface>::Register(this);
+        AZ::Interface<ReadOnlyEntityPublicInterface>::Register(this);
+        EditorEntityContextNotificationBus::Handler::BusConnect();
+    }
+
+    void ReadOnlyEntitySystemComponent::Deactivate()
+    {
+        EditorEntityContextNotificationBus::Handler::BusDisconnect();
+        AZ::Interface<ReadOnlyEntityPublicInterface>::Unregister(this);
+        AZ::Interface<ReadOnlyEntityQueryInterface>::Unregister(this);
+    }
+
+    void ReadOnlyEntitySystemComponent::Reflect(AZ::ReflectContext* context)
+    {
+        if (auto serializeContext = azrtti_cast<AZ::SerializeContext*>(context))
+        {
+            serializeContext->Class<ReadOnlyEntitySystemComponent, AZ::Component>()->Version(1);
+        }
+    }
+
+    void ReadOnlyEntitySystemComponent::GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided)
+    {
+        provided.push_back(AZ_CRC_CE("ReadOnlyEntityService"));
+    }
+
+    bool ReadOnlyEntitySystemComponent::IsReadOnly(const AZ::EntityId& entityId)
+    {
+        if (!m_readOnlystates.contains(entityId))
+        {
+            QueryReadOnlyStateForEntity(entityId);
+        }
+
+        return m_readOnlystates[entityId];
+    }
+
+    void ReadOnlyEntitySystemComponent::RefreshReadOnlyState(const EntityIdList& entityIds)
+    {
+        for (const AZ::EntityId entityId : entityIds)
+        {
+            bool wasReadOnly = m_readOnlystates[entityId];
+            QueryReadOnlyStateForEntity(entityId);
+
+            if (bool isReadOnly = m_readOnlystates[entityId]; wasReadOnly != isReadOnly)
+            {
+                ReadOnlyEntityPublicNotificationBus::Broadcast(
+                    &ReadOnlyEntityPublicNotificationBus::Events::OnReadOnlyEntityStatusChanged, entityId, isReadOnly);
+            }
+        }
+    }
+
+    void ReadOnlyEntitySystemComponent::RefreshReadOnlyStateForAllEntities()
+    {
+        for (auto elem : m_readOnlystates)
+        {
+            AZ::EntityId entityId = elem.first;
+            bool wasReadOnly = m_readOnlystates[entityId];
+            QueryReadOnlyStateForEntity(entityId);
+
+            if (bool isReadOnly = m_readOnlystates[entityId]; wasReadOnly != isReadOnly)
+            {
+                ReadOnlyEntityPublicNotificationBus::Broadcast(
+                    &ReadOnlyEntityPublicNotificationBus::Events::OnReadOnlyEntityStatusChanged, entityId, isReadOnly);
+            }
+        }
+    }
+
+    void ReadOnlyEntitySystemComponent::OnContextReset()
+    {
+        m_readOnlystates.clear();
+    }
+
+    void ReadOnlyEntitySystemComponent::QueryReadOnlyStateForEntity(const AZ::EntityId& entityId)
+    {
+        bool isReadOnly = false;
+
+        ReadOnlyEntityQueryRequestBus::Broadcast(
+            &ReadOnlyEntityQueryRequestBus::Events::IsReadOnly, entityId, isReadOnly);
+
+        m_readOnlystates[entityId] = isReadOnly;
+    }
+
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Entity/ReadOnly/ReadOnlyEntitySystemComponent.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Component/Component.h>
+#include <AzCore/Memory/SystemAllocator.h>
+
+#include <AzToolsFramework/Entity/EditorEntityContextBus.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityInterface.h>
+
+namespace AzToolsFramework
+{
+    //! System Component to track read-only entity registration.
+    //! An entity registered as ReadOnly cannot be altered in the Editor.
+    class ReadOnlyEntitySystemComponent final
+        : public AZ::Component
+        , private ReadOnlyEntityPublicInterface
+        , private ReadOnlyEntityQueryInterface
+        , private EditorEntityContextNotificationBus::Handler
+    {
+    public:
+        AZ_COMPONENT(ReadOnlyEntitySystemComponent, "{B32EB03F-D88F-4B3A-9C16-071AF04DA646}");
+
+        ReadOnlyEntitySystemComponent() = default;
+        virtual ~ReadOnlyEntitySystemComponent() = default;
+
+        // AZ::Component overrides ...
+        void Activate() override;
+        void Deactivate() override;
+
+        static void Reflect(AZ::ReflectContext* context);
+        static void GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided);
+
+        // ReadOnlyEntityPublicNotifications overrides ...
+        bool IsReadOnly(const AZ::EntityId& entityId) override;
+        
+        // ReadOnlyEntityQueryInterface overrides ...
+        void RefreshReadOnlyState(const EntityIdList& entityIds) override;
+        void RefreshReadOnlyStateForAllEntities() override;
+
+        // EditorEntityContextNotificationBus overrides ...
+        void OnContextReset() override;
+
+    private:
+        void QueryReadOnlyStateForEntity(const AZ::EntityId& entityId);
+
+        AZStd::unordered_map<AZ::EntityId, bool> m_readOnlystates;
+    };
+
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/BaseManipulator.cpp

@@ -14,7 +14,7 @@
 
 namespace AzToolsFramework
 {
-    AZ_CVAR(bool, cl_manipulatorDrawDebug, false, nullptr, AZ::ConsoleFunctorFlags::Null, "Enable debug drawing for Manipulators");
+    AZ_CVAR(bool, ed_manipulatorDrawDebug, false, nullptr, AZ::ConsoleFunctorFlags::Null, "Enable debug drawing for Manipulators");
 
     const AZ::Color BaseManipulator::s_defaultMouseOverColor = AZ::Color(1.0f, 1.0f, 0.0f, 1.0f); // yellow
 

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/BaseManipulator.h

@@ -28,7 +28,7 @@ namespace AzFramework
 
 namespace AzToolsFramework
 {
-    AZ_CVAR_EXTERNED(bool, cl_manipulatorDrawDebug);
+    AZ_CVAR_EXTERNED(bool, ed_manipulatorDrawDebug);
 
     namespace UndoSystem
     {

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/LinearManipulator.cpp

@@ -207,7 +207,7 @@ namespace AzToolsFramework
             ? AZ::Transform::CreateFromQuaternionAndTranslation(m_visualOrientationOverride, GetLocalPosition())
             : GetLocalTransform();
 
-        if (cl_manipulatorDrawDebug)
+        if (ed_manipulatorDrawDebug)
         {
             if (PerformingAction())
             {

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/ManipulatorView.cpp

@@ -21,6 +21,7 @@
 #include <AzToolsFramework/Manipulators/PlanarManipulator.h>
 #include <AzToolsFramework/Manipulators/SplineSelectionManipulator.h>
 #include <AzToolsFramework/Maths/TransformUtils.h>
+#include <AzToolsFramework/Viewport/ViewportSettings.h>
 #include <AzToolsFramework/ViewportSelection/EditorSelectionUtil.h>
 
 AZ_CVAR(
@@ -30,6 +31,13 @@ AZ_CVAR(
     nullptr,
     AZ::ConsoleFunctorFlags::Null,
     "Display additional debug drawing for manipulator bounds");
+AZ_CVAR(
+    float,
+    ed_planarManipulatorBoundScaleFactor,
+    1.75f,
+    nullptr,
+    AZ::ConsoleFunctorFlags::Null,
+    "The scale factor to apply to the planar manipulator bounds");
 
 namespace AzToolsFramework
 {
@@ -78,7 +86,8 @@ namespace AzToolsFramework
         {
             // check if we actually needed to flip the axis, if so, write to shouldCorrect
             // so we know and are able to draw it differently if we wish (e.g. hollow if flipped)
-            const bool correcting = ShouldFlipCameraAxis(worldFromLocal, localPosition, axis, cameraState);
+            const bool correcting =
+                FlipManipulatorAxesTowardsView() && ShouldFlipCameraAxis(worldFromLocal, localPosition, axis, cameraState);
 
             // the corrected axis, if no flip was required, output == input
             correctedAxis = correcting ? -axis : axis;
@@ -325,7 +334,8 @@ namespace AzToolsFramework
     float ManipulatorView::ManipulatorViewScaleMultiplier(
         const AZ::Vector3& worldPosition, const AzFramework::CameraState& cameraState) const
     {
-        return ScreenSizeFixed() ? CalculateScreenToWorldMultiplier(worldPosition, cameraState) : 1.0f;
+        const float screenScale = ScreenSizeFixed() ? CalculateScreenToWorldMultiplier(worldPosition, cameraState) : 1.0f;
+        return screenScale * ManipulatorViewBaseScale();
     }
 
     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -342,47 +352,77 @@ namespace AzToolsFramework
         const AZ::Vector3 axis1 = m_axis1;
         const AZ::Vector3 axis2 = m_axis2;
 
-        CameraCorrectAxis(
-            axis1, m_cameraCorrectedAxis1, managerState, mouseInteraction, manipulatorState.m_worldFromLocal,
-            manipulatorState.m_localPosition, cameraState);
-        CameraCorrectAxis(
-            axis2, m_cameraCorrectedAxis2, managerState, mouseInteraction, manipulatorState.m_worldFromLocal,
-            manipulatorState.m_localPosition, cameraState);
+        // support partial application of CameraCorrectAxis to reduce redundant call site parameters
+        auto cameraCorrectAxisPartialFn =
+            [&manipulatorState, &managerState, &mouseInteraction, &cameraState](const AZ::Vector3& inAxis, AZ::Vector3& outAxis)
+        {
+            CameraCorrectAxis(
+                inAxis, outAxis, managerState, mouseInteraction, manipulatorState.m_worldFromLocal, manipulatorState.m_localPosition,
+                cameraState);
+        };
 
-        const Picking::BoundShapeQuad quadBound = CalculateQuadBound(
-            manipulatorState.m_localPosition, manipulatorState, m_cameraCorrectedAxis1, m_cameraCorrectedAxis2,
-            m_size *
-                ManipulatorViewScaleMultiplier(
-                    manipulatorState.m_worldFromLocal.TransformPoint(manipulatorState.m_localPosition), cameraState));
+        cameraCorrectAxisPartialFn(axis1, m_cameraCorrectedAxis1);
+        cameraCorrectAxisPartialFn(axis2, m_cameraCorrectedAxis2);
+        cameraCorrectAxisPartialFn(axis1 * axis1.Dot(m_offset), m_cameraCorrectedOffsetAxis1);
+        cameraCorrectAxisPartialFn(axis2 * axis2.Dot(m_offset), m_cameraCorrectedOffsetAxis2);
+
+        const AZ::Vector3 totalScale =
+            manipulatorState.m_nonUniformScale * AZ::Vector3(manipulatorState.m_worldFromLocal.GetUniformScale());
+
+        const auto cameraCorrectedVisualOffset = (m_cameraCorrectedOffsetAxis1 + m_cameraCorrectedOffsetAxis2) * totalScale.GetReciprocal();
+        const auto viewScale =
+            ManipulatorViewScaleMultiplier(manipulatorState.m_worldFromLocal.TransformPoint(manipulatorState.m_localPosition), cameraState);
+        const Picking::BoundShapeQuad quadBoundVisual = CalculateQuadBound(
+            manipulatorState.m_localPosition + (cameraCorrectedVisualOffset * viewScale), manipulatorState, m_cameraCorrectedAxis1,
+            m_cameraCorrectedAxis2, m_size * viewScale);
 
         debugDisplay.SetLineWidth(defaultLineWidth(manipulatorState.m_mouseOver));
 
         debugDisplay.SetColor(ViewColor(manipulatorState.m_mouseOver, m_axis1Color, m_mouseOverColor).GetAsVector4());
-        debugDisplay.DrawLine(quadBound.m_corner4, quadBound.m_corner3);
+        debugDisplay.DrawLine(quadBoundVisual.m_corner4, quadBoundVisual.m_corner3);
+        debugDisplay.DrawLine(quadBoundVisual.m_corner1, quadBoundVisual.m_corner2);
 
         debugDisplay.SetColor(ViewColor(manipulatorState.m_mouseOver, m_axis2Color, m_mouseOverColor).GetAsVector4());
-        debugDisplay.DrawLine(quadBound.m_corner2, quadBound.m_corner3);
+        debugDisplay.DrawLine(quadBoundVisual.m_corner2, quadBoundVisual.m_corner3);
+        debugDisplay.DrawLine(quadBoundVisual.m_corner1, quadBoundVisual.m_corner4);
 
         if (manipulatorState.m_mouseOver)
         {
             debugDisplay.SetColor(Vector3ToVector4(m_mouseOverColor.GetAsVector3(), 0.5f));
 
             debugDisplay.CullOff();
-            debugDisplay.DrawQuad(quadBound.m_corner1, quadBound.m_corner2, quadBound.m_corner3, quadBound.m_corner4);
+            debugDisplay.DrawQuad(
+                quadBoundVisual.m_corner1, quadBoundVisual.m_corner2, quadBoundVisual.m_corner3, quadBoundVisual.m_corner4);
             debugDisplay.CullOn();
         }
 
-        RefreshBoundInternal(managerId, manipulatorId, quadBound);
+        // total size of bounds to use for mouse intersection
+        const float hitSize = m_size * ed_planarManipulatorBoundScaleFactor;
+        // size of edge bounds (the 'margin/border' outside the visual representation)
+        const float edgeSize = (hitSize - m_size) * 0.5f;
+        const AZ::Vector3 edgeOffset =
+            ((m_cameraCorrectedAxis1 * edgeSize + m_cameraCorrectedAxis2 * edgeSize) * totalScale.GetReciprocal());
+        const auto cameraCorrectedHitOffset = cameraCorrectedVisualOffset - edgeOffset;
+        const Picking::BoundShapeQuad quadBoundHit = CalculateQuadBound(
+            manipulatorState.m_localPosition + (cameraCorrectedHitOffset * viewScale), manipulatorState, m_cameraCorrectedAxis1,
+            m_cameraCorrectedAxis2, hitSize * viewScale);
+
+        if (ed_manipulatorDisplayBoundDebug)
+        {
+            debugDisplay.DrawQuad(quadBoundHit.m_corner1, quadBoundHit.m_corner2, quadBoundHit.m_corner3, quadBoundHit.m_corner4);
+        }
+
+        RefreshBoundInternal(managerId, manipulatorId, quadBoundHit);
     }
 
     void ManipulatorViewQuadBillboard::Draw(
         const ManipulatorManagerId managerId,
-        const ManipulatorManagerState& /*managerState*/,
+        [[maybe_unused]] const ManipulatorManagerState& managerState,
         const ManipulatorId manipulatorId,
         const ManipulatorState& manipulatorState,
         AzFramework::DebugDisplayRequests& debugDisplay,
         const AzFramework::CameraState& cameraState,
-        const ViewportInteraction::MouseInteraction& /*mouseInteraction*/)
+        [[maybe_unused]] const ViewportInteraction::MouseInteraction& mouseInteraction)
     {
         const Picking::BoundShapeQuad quadBound = CalculateQuadBoundBillboard(
             manipulatorState.m_localPosition, manipulatorState.m_worldFromLocal,
@@ -442,7 +482,7 @@ namespace AzToolsFramework
 
     void ManipulatorViewLineSelect::Draw(
         const ManipulatorManagerId managerId,
-        const ManipulatorManagerState& /*managerState*/,
+        [[maybe_unused]] const ManipulatorManagerState& managerState,
         const ManipulatorId manipulatorId,
         const ManipulatorState& manipulatorState,
         AzFramework::DebugDisplayRequests& debugDisplay,
@@ -570,7 +610,7 @@ namespace AzToolsFramework
 
     void ManipulatorViewSphere::Draw(
         const ManipulatorManagerId managerId,
-        const ManipulatorManagerState& /*managerState*/,
+        [[maybe_unused]] const ManipulatorManagerState& managerState,
         const ManipulatorId manipulatorId,
         const ManipulatorState& manipulatorState,
         AzFramework::DebugDisplayRequests& debugDisplay,
@@ -599,12 +639,12 @@ namespace AzToolsFramework
 
     void ManipulatorViewCircle::Draw(
         const ManipulatorManagerId managerId,
-        const ManipulatorManagerState& /*managerState*/,
+        [[maybe_unused]] const ManipulatorManagerState& managerState,
         const ManipulatorId manipulatorId,
         const ManipulatorState& manipulatorState,
         AzFramework::DebugDisplayRequests& debugDisplay,
         const AzFramework::CameraState& cameraState,
-        const ViewportInteraction::MouseInteraction& /*mouseInteraction*/)
+        [[maybe_unused]] const ViewportInteraction::MouseInteraction& mouseInteraction)
     {
         const float viewScale =
             ManipulatorViewScaleMultiplier(manipulatorState.m_worldFromLocal.TransformPoint(manipulatorState.m_localPosition), cameraState);
@@ -665,7 +705,7 @@ namespace AzToolsFramework
 
     void ManipulatorViewSplineSelect::Draw(
         const ManipulatorManagerId managerId,
-        const ManipulatorManagerState& /*managerState*/,
+        [[maybe_unused]] const ManipulatorManagerState& managerState,
         const ManipulatorId manipulatorId,
         const ManipulatorState& manipulatorState,
         AzFramework::DebugDisplayRequests& debugDisplay,
@@ -698,12 +738,17 @@ namespace AzToolsFramework
     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
     AZStd::unique_ptr<ManipulatorViewQuad> CreateManipulatorViewQuad(
-        const PlanarManipulator& planarManipulator, const AZ::Color& axis1Color, const AZ::Color& axis2Color, const float size)
+        const PlanarManipulator& planarManipulator,
+        const AZ::Color& axis1Color,
+        const AZ::Color& axis2Color,
+        const AZ::Vector3& offset,
+        const float size)
     {
         AZStd::unique_ptr<ManipulatorViewQuad> viewQuad = AZStd::make_unique<ManipulatorViewQuad>();
         viewQuad->m_axis1 = planarManipulator.GetAxis1();
         viewQuad->m_axis2 = planarManipulator.GetAxis2();
         viewQuad->m_size = size;
+        viewQuad->m_offset = offset;
         viewQuad->m_axis1Color = axis1Color;
         viewQuad->m_axis2Color = axis2Color;
         return viewQuad;

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/ManipulatorView.h

@@ -54,7 +54,7 @@ namespace AzToolsFramework
         AZ_RTTI(ManipulatorView, "{7529E3E9-39B3-4D15-899A-FA13770113B2}")
 
         ManipulatorView();
-        ManipulatorView(bool screenSizeFixed);
+        explicit ManipulatorView(bool screenSizeFixed);
         virtual ~ManipulatorView();
         ManipulatorView(ManipulatorView&&) = default;
         ManipulatorView& operator=(ManipulatorView&&) = default;
@@ -117,13 +117,16 @@ namespace AzToolsFramework
 
         AZ::Vector3 m_axis1 = AZ::Vector3(1.0f, 0.0f, 0.0f);
         AZ::Vector3 m_axis2 = AZ::Vector3(0.0f, 1.0f, 0.0f);
+        AZ::Vector3 m_offset = AZ::Vector3::CreateZero();
         AZ::Color m_axis1Color = AZ::Color(1.0f, 0.0f, 0.0f, 1.0f);
         AZ::Color m_axis2Color = AZ::Color(1.0f, 0.0f, 0.0f, 1.0f);
         float m_size = 0.06f; //!< size to render and do mouse ray intersection tests against.
 
     private:
-        AZ::Vector3 m_cameraCorrectedAxis1;
-        AZ::Vector3 m_cameraCorrectedAxis2;
+        AZ::Vector3 m_cameraCorrectedAxis1; //!< First axis of quad (should be orthogonal to second axis).
+        AZ::Vector3 m_cameraCorrectedAxis2; //!< Second axis of quad (should be orthogonal to first axis).
+        AZ::Vector3 m_cameraCorrectedOffsetAxis1; //!< Offset along first axis (parallel with first axis).
+        AZ::Vector3 m_cameraCorrectedOffsetAxis2; //!< Offset along second axis (parallel with second axis).
     };
 
     //! A screen aligned quad, centered at the position of the manipulator, display filled.
@@ -379,7 +382,11 @@ namespace AzToolsFramework
     // Helpers to create various manipulator views.
 
     AZStd::unique_ptr<ManipulatorViewQuad> CreateManipulatorViewQuad(
-        const PlanarManipulator& planarManipulator, const AZ::Color& axis1Color, const AZ::Color& axis2Color, float size);
+        const PlanarManipulator& planarManipulator,
+        const AZ::Color& axis1Color,
+        const AZ::Color& axis2Color,
+        const AZ::Vector3& offset,
+        float size);
 
     AZStd::unique_ptr<ManipulatorViewQuadBillboard> CreateManipulatorViewQuadBillboard(const AZ::Color& color, float size);
 

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/MultiLinearManipulator.cpp

@@ -132,7 +132,7 @@ namespace AzToolsFramework
         const AzFramework::CameraState& cameraState,
         const ViewportInteraction::MouseInteraction& mouseInteraction)
     {
-        if (cl_manipulatorDrawDebug)
+        if (ed_manipulatorDrawDebug)
         {
             const AZ::Transform combined = TransformUniformScale(GetSpace()) * GetLocalTransform();
             for (const auto& fixed : m_fixedAxes)

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/PlanarManipulator.cpp

@@ -171,7 +171,7 @@ namespace AzToolsFramework
         const AzFramework::CameraState& cameraState,
         const ViewportInteraction::MouseInteraction& mouseInteraction)
     {
-        if (cl_manipulatorDrawDebug)
+        if (ed_manipulatorDrawDebug)
         {
             if (PerformingAction())
             {

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/ScaleManipulators.cpp

@@ -9,6 +9,7 @@
 #include "ScaleManipulators.h"
 
 #include <AzToolsFramework/Maths/TransformUtils.h>
+#include <AzToolsFramework/Viewport/ViewportSettings.h>
 
 namespace AzToolsFramework
 {
@@ -120,25 +121,25 @@ namespace AzToolsFramework
     void ScaleManipulators::ConfigureView(
         const float axisLength, const AZ::Color& axis1Color, const AZ::Color& axis2Color, const AZ::Color& axis3Color)
     {
-        const float boxSize = 0.1f;
+        const float boxHalfExtent = ScaleManipulatorBoxHalfExtent();
         const AZ::Color colors[] = { axis1Color, axis2Color, axis3Color };
 
         for (size_t manipulatorIndex = 0; manipulatorIndex < m_axisScaleManipulators.size(); ++manipulatorIndex)
         {
-            const auto lineLength = axisLength - boxSize;
+            const auto lineLength = axisLength - (2.0f * boxHalfExtent);
 
             ManipulatorViews views;
-            views.emplace_back(
-                CreateManipulatorViewLine(*m_axisScaleManipulators[manipulatorIndex], colors[manipulatorIndex], axisLength, m_lineBoundWidth));
+            views.emplace_back(CreateManipulatorViewLine(
+                *m_axisScaleManipulators[manipulatorIndex], colors[manipulatorIndex], axisLength, m_lineBoundWidth));
             views.emplace_back(CreateManipulatorViewBox(
                 AZ::Transform::CreateIdentity(), colors[manipulatorIndex],
-                m_axisScaleManipulators[manipulatorIndex]->GetAxis() * lineLength, AZ::Vector3(boxSize)));
+                m_axisScaleManipulators[manipulatorIndex]->GetAxis() * (lineLength + boxHalfExtent), AZ::Vector3(boxHalfExtent)));
             m_axisScaleManipulators[manipulatorIndex]->SetViews(AZStd::move(views));
         }
 
         ManipulatorViews views;
         views.emplace_back(CreateManipulatorViewBox(
-            AZ::Transform::CreateIdentity(), AZ::Color::CreateOne(), AZ::Vector3::CreateZero(), AZ::Vector3(boxSize)));
+            AZ::Transform::CreateIdentity(), AZ::Color::CreateOne(), AZ::Vector3::CreateZero(), AZ::Vector3(boxHalfExtent)));
         m_uniformScaleManipulator->SetViews(AZStd::move(views));
     }
 

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/TranslationManipulators.cpp

@@ -10,13 +10,10 @@
 
 #include <AzCore/Math/VectorConversions.h>
 #include <AzToolsFramework/Manipulators/ManipulatorView.h>
+#include <AzToolsFramework/Viewport/ViewportSettings.h>
 
 namespace AzToolsFramework
 {
-    static const float SurfaceManipulatorTransparency = 0.75f;
-    static const float LinearManipulatorAxisLength = 2.0f;
-    static const float SurfaceManipulatorRadius = 0.1f;
-
     static const AZ::Color LinearManipulatorXAxisColor = AZ::Color(1.0f, 0.0f, 0.0f, 1.0f);
     static const AZ::Color LinearManipulatorYAxisColor = AZ::Color(0.0f, 1.0f, 0.0f, 1.0f);
     static const AZ::Color LinearManipulatorZAxisColor = AZ::Color(0.0f, 0.0f, 1.0f, 1.0f);
@@ -240,18 +237,16 @@ namespace AzToolsFramework
         const AZ::Color& axis2Color,
         const AZ::Color& axis3Color /*= AZ::Color(0.0f, 0.0f, 1.0f, 0.5f)*/)
     {
-        const float coneLength = 0.28f;
-        const float coneRadius = 0.07f;
-
         const AZ::Color axesColor[] = { axis1Color, axis2Color, axis3Color };
 
-        const auto configureLinearView = [lineBoundWidth = m_lineBoundWidth, coneLength, axisLength,
-                                          coneRadius](LinearManipulator* linearManipulator, const AZ::Color& color)
+        const auto configureLinearView =
+            [lineBoundWidth = m_lineBoundWidth, coneLength = LinearManipulatorConeLength(), axisLength,
+             coneRadius = LinearManipulatorConeRadius()](LinearManipulator* linearManipulator, const AZ::Color& color)
         {
             const auto lineLength = axisLength - coneLength;
 
             ManipulatorViews views;
-            views.emplace_back(CreateManipulatorViewLine(*linearManipulator, color, lineLength, lineBoundWidth));
+            views.emplace_back(CreateManipulatorViewLine(*linearManipulator, color, axisLength, lineBoundWidth));
             views.emplace_back(
                 CreateManipulatorViewCone(*linearManipulator, color, linearManipulator->GetAxis() * lineLength, coneLength, coneRadius));
             linearManipulator->SetViews(AZStd::move(views));
@@ -264,17 +259,23 @@ namespace AzToolsFramework
     }
 
     void TranslationManipulators::ConfigurePlanarView(
+        const float planeSize,
         const AZ::Color& plane1Color,
         const AZ::Color& plane2Color /*= AZ::Color(0.0f, 1.0f, 0.0f, 0.5f)*/,
         const AZ::Color& plane3Color /*= AZ::Color(0.0f, 0.0f, 1.0f, 0.5f)*/)
     {
-        const float planeSize = 0.6f;
         const AZ::Color planesColor[] = { plane1Color, plane2Color, plane3Color };
 
+        const float linearAxisLength = LinearManipulatorAxisLength();
+        const float linearConeLength = LinearManipulatorConeLength();
         for (size_t manipulatorIndex = 0; manipulatorIndex < m_planarManipulators.size(); ++manipulatorIndex)
         {
+            const auto& planarManipulator = *m_planarManipulators[manipulatorIndex];
             const AZStd::shared_ptr<ManipulatorViewQuad> manipulatorView = CreateManipulatorViewQuad(
-                *m_planarManipulators[manipulatorIndex], planesColor[manipulatorIndex], planesColor[(manipulatorIndex + 1) % 3], planeSize);
+                *m_planarManipulators[manipulatorIndex], planesColor[manipulatorIndex], planesColor[(manipulatorIndex + 1) % 3],
+                (planarManipulator.GetAxis1() + planarManipulator.GetAxis2()) *
+                    (((linearAxisLength - linearConeLength) * 0.5f) - (planeSize * 0.5f)),
+                planeSize);
 
             m_planarManipulators[manipulatorIndex]->SetViews(ManipulatorViews{ manipulatorView });
         }
@@ -286,12 +287,11 @@ namespace AzToolsFramework
         {
             m_surfaceManipulator->SetView(CreateManipulatorViewSphere(
                 color, radius,
-                [](const ViewportInteraction::MouseInteraction& /*mouseInteraction*/, bool mouseOver,
+                []([[maybe_unused]] const ViewportInteraction::MouseInteraction& mouseInteraction, bool mouseOver,
                    const AZ::Color& defaultColor) -> AZ::Color
                 {
                     const AZ::Color color[2] = {
-                        defaultColor,
-                        Vector3ToVector4(BaseManipulator::s_defaultMouseOverColor.GetAsVector3(), SurfaceManipulatorTransparency)
+                        defaultColor, Vector3ToVector4(BaseManipulator::s_defaultMouseOverColor.GetAsVector3(), SurfaceManipulatorOpacity())
                     };
 
                     return color[mouseOver];
@@ -325,16 +325,19 @@ namespace AzToolsFramework
     void ConfigureTranslationManipulatorAppearance3d(TranslationManipulators* translationManipulators)
     {
         translationManipulators->SetAxes(AZ::Vector3::CreateAxisX(), AZ::Vector3::CreateAxisY(), AZ::Vector3::CreateAxisZ());
-        translationManipulators->ConfigurePlanarView(LinearManipulatorXAxisColor, LinearManipulatorYAxisColor, LinearManipulatorZAxisColor);
+        translationManipulators->ConfigurePlanarView(
+            PlanarManipulatorAxisLength(), LinearManipulatorXAxisColor, LinearManipulatorYAxisColor, LinearManipulatorZAxisColor);
         translationManipulators->ConfigureLinearView(
-            LinearManipulatorAxisLength, LinearManipulatorXAxisColor, LinearManipulatorYAxisColor, LinearManipulatorZAxisColor);
-        translationManipulators->ConfigureSurfaceView(SurfaceManipulatorRadius, SurfaceManipulatorColor);
+            LinearManipulatorAxisLength(), LinearManipulatorXAxisColor, LinearManipulatorYAxisColor, LinearManipulatorZAxisColor);
+        translationManipulators->ConfigureSurfaceView(SurfaceManipulatorRadius(), SurfaceManipulatorColor);
     }
 
     void ConfigureTranslationManipulatorAppearance2d(TranslationManipulators* translationManipulators)
     {
         translationManipulators->SetAxes(AZ::Vector3::CreateAxisX(), AZ::Vector3::CreateAxisY());
-        translationManipulators->ConfigurePlanarView(LinearManipulatorXAxisColor);
-        translationManipulators->ConfigureLinearView(LinearManipulatorAxisLength, LinearManipulatorXAxisColor, LinearManipulatorYAxisColor);
+        translationManipulators->ConfigurePlanarView(
+            PlanarManipulatorAxisLength(), LinearManipulatorXAxisColor, LinearManipulatorYAxisColor);
+        translationManipulators->ConfigureLinearView(
+            LinearManipulatorAxisLength(), LinearManipulatorXAxisColor, LinearManipulatorYAxisColor);
     }
 } // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/TranslationManipulators.h

@@ -53,6 +53,7 @@ namespace AzToolsFramework
         void SetAxes(const AZ::Vector3& axis1, const AZ::Vector3& axis2, const AZ::Vector3& axis3 = AZ::Vector3::CreateAxisZ());
 
         void ConfigurePlanarView(
+            float planeSize,
             const AZ::Color& plane1Color,
             const AZ::Color& plane2Color = AZ::Color(0.0f, 1.0f, 0.0f, 0.5f),
             const AZ::Color& plane3Color = AZ::Color(0.0f, 0.0f, 1.0f, 0.5f));

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicHandler.cpp

@@ -521,21 +521,18 @@ namespace AzToolsFramework
                 nestedInstanceLink.has_value(),
                 "A valid link was not found for one of the instances provided as input for the CreatePrefab operation.");    
 
-            PrefabDomReference nestedInstanceLinkDom = nestedInstanceLink->get().GetLinkDom();
-            AZ_Assert(
-                nestedInstanceLinkDom.has_value(),
-                "A valid DOM was not found for the link corresponding to one of the instances provided as input for the "
-                "CreatePrefab operation.");
-
-            PrefabDomValueReference nestedInstanceLinkPatches =
-                PrefabDomUtils::FindPrefabDomValue(nestedInstanceLinkDom->get(), PrefabDomUtils::PatchesName);
-            AZ_Assert(
-                nestedInstanceLinkPatches.has_value(),
-                "A valid DOM for patches was not found for the link corresponding to one of the instances provided as input for the "
-                "CreatePrefab operation.");
-
             PrefabDom patchesCopyForUndoSupport;
-            patchesCopyForUndoSupport.CopyFrom(nestedInstanceLinkPatches->get(), patchesCopyForUndoSupport.GetAllocator());
+            PrefabDomReference nestedInstanceLinkDom = nestedInstanceLink->get().GetLinkDom();
+            if (nestedInstanceLinkDom.has_value())
+            {
+                PrefabDomValueReference nestedInstanceLinkPatches =
+                    PrefabDomUtils::FindPrefabDomValue(nestedInstanceLinkDom->get(), PrefabDomUtils::PatchesName);
+                if (nestedInstanceLinkPatches.has_value())
+                {
+                    patchesCopyForUndoSupport.CopyFrom(nestedInstanceLinkPatches->get(), patchesCopyForUndoSupport.GetAllocator());
+                }
+            }
+
             PrefabUndoHelpers::RemoveLink(
                 sourceInstance->GetTemplateId(), targetTemplateId, sourceInstance->GetInstanceAlias(), sourceInstance->GetLinkId(),
                 AZStd::move(patchesCopyForUndoSupport), undoBatch);

Code/Framework/AzToolsFramework/AzToolsFramework/Viewport/ViewportSettings.cpp

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzToolsFramework/Viewport/ViewportSettings.h>
+
+namespace AzToolsFramework
+{
+    constexpr AZStd::string_view FlipManipulatorAxesTowardsViewSetting = "/Amazon/Preferences/Editor/Manipulator/FlipManipulatorAxesTowardsView";
+    constexpr AZStd::string_view LinearManipulatorAxisLengthSetting = "/Amazon/Preferences/Editor/Manipulator/LinearManipulatorAxisLength";
+    constexpr AZStd::string_view PlanarManipulatorAxisLengthSetting = "/Amazon/Preferences/Editor/Manipulator/PlanarManipulatorAxisLength";
+    constexpr AZStd::string_view SurfaceManipulatorRadiusSetting = "/Amazon/Preferences/Editor/Manipulator/SurfaceManipulatorRadius";
+    constexpr AZStd::string_view SurfaceManipulatorOpacitySetting = "/Amazon/Preferences/Editor/Manipulator/SurfaceManipulatorOpacity";
+    constexpr AZStd::string_view LinearManipulatorConeLengthSetting = "/Amazon/Preferences/Editor/Manipulator/LinearManipulatorConeLength";
+    constexpr AZStd::string_view LinearManipulatorConeRadiusSetting = "/Amazon/Preferences/Editor/Manipulator/LinearManipulatorConeRadius";
+    constexpr AZStd::string_view ScaleManipulatorBoxHalfExtentSetting = "/Amazon/Preferences/Editor/Manipulator/ScaleManipulatorBoxHalfExtent";
+    constexpr AZStd::string_view RotationManipulatorRadiusSetting = "/Amazon/Preferences/Editor/Manipulator/RotationManipulatorRadius";
+    constexpr AZStd::string_view ManipulatorViewBaseScaleSetting = "/Amazon/Preferences/Editor/Manipulator/ViewBaseScale";
+
+    bool FlipManipulatorAxesTowardsView()
+    {
+        return GetRegistry(FlipManipulatorAxesTowardsViewSetting, true);
+    }
+
+    void SetFlipManipulatorAxesTowardsView(const bool enabled)
+    {
+        SetRegistry(FlipManipulatorAxesTowardsViewSetting, enabled);
+    }
+
+    float LinearManipulatorAxisLength()
+    {
+        return aznumeric_cast<float>(GetRegistry(LinearManipulatorAxisLengthSetting, 2.0));
+    }
+
+    void SetLinearManipulatorAxisLength(const float length)
+    {
+        SetRegistry(LinearManipulatorAxisLengthSetting, length);
+    }
+
+    float PlanarManipulatorAxisLength()
+    {
+        return aznumeric_cast<float>(GetRegistry(PlanarManipulatorAxisLengthSetting, 0.6));
+    }
+
+    void SetPlanarManipulatorAxisLength(const float length)
+    {
+        SetRegistry(PlanarManipulatorAxisLengthSetting, length);
+    }
+
+    float SurfaceManipulatorRadius()
+    {
+        return aznumeric_cast<float>(GetRegistry(SurfaceManipulatorRadiusSetting, 0.1));
+    }
+
+    void SetSurfaceManipulatorRadius(const float radius)
+    {
+        SetRegistry(SurfaceManipulatorRadiusSetting, radius);
+    }
+
+    float SurfaceManipulatorOpacity()
+    {
+        return aznumeric_cast<float>(GetRegistry(SurfaceManipulatorOpacitySetting, 0.75));
+    }
+
+    void SetSurfaceManipulatorOpacity(const float opacity)
+    {
+        SetRegistry(SurfaceManipulatorOpacitySetting, opacity);
+    }
+
+    float LinearManipulatorConeLength()
+    {
+        return aznumeric_cast<float>(GetRegistry(LinearManipulatorConeLengthSetting, 0.28));
+    }
+
+    void SetLinearManipulatorConeLength(const float length)
+    {
+        SetRegistry(LinearManipulatorConeLengthSetting, length);
+    }
+
+    float LinearManipulatorConeRadius()
+    {
+        return aznumeric_cast<float>(GetRegistry(LinearManipulatorConeRadiusSetting, 0.1));
+    }
+
+    void SetLinearManipulatorConeRadius(const float radius)
+    {
+        SetRegistry(LinearManipulatorConeRadiusSetting, radius);
+    }
+
+    float ScaleManipulatorBoxHalfExtent()
+    {
+        return aznumeric_cast<float>(GetRegistry(ScaleManipulatorBoxHalfExtentSetting, 0.1));
+    }
+
+    void SetScaleManipulatorBoxHalfExtent(const float size)
+    {
+        SetRegistry(ScaleManipulatorBoxHalfExtentSetting, size);
+    }
+
+    float RotationManipulatorRadius()
+    {
+        return aznumeric_cast<float>(GetRegistry(RotationManipulatorRadiusSetting, 2.0));
+    }
+
+    void SetRotationManipulatorRadius(const float radius)
+    {
+        SetRegistry(RotationManipulatorRadiusSetting, radius);
+    }
+
+    float ManipulatorViewBaseScale()
+    {
+        return aznumeric_cast<float>(GetRegistry(ManipulatorViewBaseScaleSetting, 1.0));
+    }
+
+    void SetManipulatorViewBaseScale(const float scale)
+    {
+        SetRegistry(ManipulatorViewBaseScaleSetting, scale);
+    }
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Viewport/ViewportSettings.h

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Settings/SettingsRegistry.h>
+
+namespace AzToolsFramework
+{
+    template<typename T>
+    void SetRegistry(const AZStd::string_view setting, T&& value)
+    {
+        if (auto* registry = AZ::SettingsRegistry::Get())
+        {
+            registry->Set(setting, AZStd::forward<T>(value));
+        }
+    }
+
+    template<typename T>
+    AZStd::remove_cvref_t<T> GetRegistry(const AZStd::string_view setting, T&& defaultValue)
+    {
+        AZStd::remove_cvref_t<T> value = AZStd::forward<T>(defaultValue);
+        if (const auto* registry = AZ::SettingsRegistry::Get())
+        {
+            T potentialValue;
+            if (registry->Get(potentialValue, setting))
+            {
+                value = AZStd::move(potentialValue);
+            }
+        }
+
+        return value;
+    }
+
+    bool FlipManipulatorAxesTowardsView();
+    void SetFlipManipulatorAxesTowardsView(bool enabled);
+
+    float LinearManipulatorAxisLength();
+    void SetLinearManipulatorAxisLength(float length);
+
+    float PlanarManipulatorAxisLength();
+    void SetPlanarManipulatorAxisLength(float length);
+
+    float SurfaceManipulatorRadius();
+    void SetSurfaceManipulatorRadius(float radius);
+
+    float SurfaceManipulatorOpacity();
+    void SetSurfaceManipulatorOpacity(float opacity);
+
+    float LinearManipulatorConeLength();
+    void SetLinearManipulatorConeLength(float length);
+
+    float LinearManipulatorConeRadius();
+    void SetLinearManipulatorConeRadius(float radius);
+
+    float ScaleManipulatorBoxHalfExtent();
+    void SetScaleManipulatorBoxHalfExtent(float halfExtent);
+
+    float RotationManipulatorRadius();
+    void SetRotationManipulatorRadius(float radius);
+
+    float ManipulatorViewBaseScale();
+    void SetManipulatorViewBaseScale(float scale);
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/ViewportSelection/EditorTransformComponentSelection.cpp

@@ -33,6 +33,7 @@
 #include <AzToolsFramework/ToolsComponents/EditorVisibilityBus.h>
 #include <AzToolsFramework/ToolsComponents/TransformComponent.h>
 #include <AzToolsFramework/Viewport/ActionBus.h>
+#include <AzToolsFramework/Viewport/ViewportSettings.h>
 #include <AzToolsFramework/ViewportSelection/EditorSelectionUtil.h>
 #include <AzToolsFramework/ViewportSelection/EditorVisibleEntityDataCache.h>
 #include <Entity/EditorEntityContextBus.h>
@@ -1376,7 +1377,7 @@ namespace AzToolsFramework
         // view
         rotationManipulators->SetLocalAxes(AZ::Vector3::CreateAxisX(), AZ::Vector3::CreateAxisY(), AZ::Vector3::CreateAxisZ());
         rotationManipulators->ConfigureView(
-            2.0f, AzFramework::ViewportColors::XAxisColor, AzFramework::ViewportColors::YAxisColor,
+            RotationManipulatorRadius(), AzFramework::ViewportColors::XAxisColor, AzFramework::ViewportColors::YAxisColor,
             AzFramework::ViewportColors::ZAxisColor);
 
         struct SharedRotationState
@@ -1535,7 +1536,8 @@ namespace AzToolsFramework
             RecalculateAverageManipulatorTransform(m_entityIdManipulators.m_lookups, m_pivotOverrideFrame, m_pivotMode, m_referenceFrame));
 
         scaleManipulators->SetAxes(AZ::Vector3::CreateAxisX(), AZ::Vector3::CreateAxisY(), AZ::Vector3::CreateAxisZ());
-        scaleManipulators->ConfigureView(2.0f, AZ::Color::CreateOne(), AZ::Color::CreateOne(), AZ::Color::CreateOne());
+        scaleManipulators->ConfigureView(
+            LinearManipulatorAxisLength(), AZ::Color::CreateOne(), AZ::Color::CreateOne(), AZ::Color::CreateOne());
 
         struct SharedScaleState
         {

Code/Framework/AzToolsFramework/AzToolsFramework/aztoolsframework_files.cmake

@@ -159,6 +159,10 @@ set(FILES
     Entity/SliceEditorEntityOwnershipServiceBus.h
     Entity/EntityUtilityComponent.h
     Entity/EntityUtilityComponent.cpp
+    Entity/ReadOnly/ReadOnlyEntityInterface.h
+    Entity/ReadOnly/ReadOnlyEntityBus.h
+    Entity/ReadOnly/ReadOnlyEntitySystemComponent.cpp
+    Entity/ReadOnly/ReadOnlyEntitySystemComponent.h
     Fingerprinting/TypeFingerprinter.h
     Fingerprinting/TypeFingerprinter.cpp
     FocusMode/FocusModeInterface.h
@@ -502,6 +506,8 @@ set(FILES
     Viewport/ViewportMessages.cpp
     Viewport/ViewportTypes.h
     Viewport/ViewportTypes.cpp
+    Viewport/ViewportSettings.h
+    Viewport/ViewportSettings.cpp
     ViewportUi/Button.h
     ViewportUi/Button.cpp
     ViewportUi/ButtonGroup.h

Code/Framework/AzToolsFramework/Tests/Entity/ReadOnly/ReadOnlyEntityFixture.cpp

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <Tests/Entity/ReadOnly/ReadOnlyEntityFixture.h>
+
+#include <AzToolsFramework/Entity/EditorEntityHelpers.h>
+
+namespace AzToolsFramework
+{
+    void ReadOnlyEntityFixture::SetUpEditorFixtureImpl()
+    {
+        // Without this, the user settings component would attempt to save on finalize/shutdown. Since the file is
+        // shared across the whole engine, if multiple tests are run in parallel, the saving could cause a crash 
+        // in the unit tests.
+        AZ::UserSettingsComponentRequestBus::Broadcast(&AZ::UserSettingsComponentRequests::DisableSaveOnFinalize);
+
+        m_readOnlyEntityPublicInterface = AZ::Interface<ReadOnlyEntityPublicInterface>::Get();
+        ASSERT_TRUE(m_readOnlyEntityPublicInterface != nullptr);
+
+        GenerateTestHierarchy();
+    }
+
+    void ReadOnlyEntityFixture::TearDownEditorFixtureImpl()
+    {
+    }
+
+    void ReadOnlyEntityFixture::GenerateTestHierarchy() 
+    {
+        /*
+        *   Root
+        *   |_  Child
+        *       |_  GrandChild1
+        *       |_  GrandChild2
+        */
+
+        m_entityMap[RootEntityName] =           CreateEditorEntity(RootEntityName, AZ::EntityId());
+        m_entityMap[ChildEntityName] =          CreateEditorEntity(ChildEntityName, m_entityMap[RootEntityName]);
+        m_entityMap[GrandChild1EntityName] =    CreateEditorEntity(GrandChild1EntityName, m_entityMap[ChildEntityName]);
+        m_entityMap[GrandChild2EntityName] =    CreateEditorEntity(GrandChild2EntityName, m_entityMap[ChildEntityName]);
+    }
+
+    AZ::EntityId ReadOnlyEntityFixture::CreateEditorEntity(const char* name, AZ::EntityId parentId)
+    {
+        AZ::Entity* entity = nullptr;
+        UnitTest::CreateDefaultEditorEntity(name, &entity);
+
+        // Parent
+        AZ::TransformBus::Event(entity->GetId(), &AZ::TransformInterface::SetParent, parentId);
+
+        return entity->GetId();
+    }
+
+    ReadOnlyHandlerAlwaysTrue::ReadOnlyHandlerAlwaysTrue()
+    {
+        auto editorEntityContextId = AzFramework::EntityContextId::CreateNull();
+        EditorEntityContextRequestBus::BroadcastResult(editorEntityContextId, &EditorEntityContextRequests::GetEditorEntityContextId);
+
+        ReadOnlyEntityQueryRequestBus::Handler::BusConnect(editorEntityContextId);
+    }
+
+    ReadOnlyHandlerAlwaysTrue::~ReadOnlyHandlerAlwaysTrue()
+    {
+        ReadOnlyEntityQueryRequestBus::Handler::BusDisconnect();
+
+        if (auto readOnlyEntityQueryInterface = AZ::Interface<ReadOnlyEntityQueryInterface>::Get())
+        {
+            readOnlyEntityQueryInterface->RefreshReadOnlyStateForAllEntities();
+        }
+    }
+
+    void ReadOnlyHandlerAlwaysTrue::IsReadOnly([[maybe_unused]] const AZ::EntityId& entityId, bool& isReadOnly)
+    {
+        isReadOnly = true;
+    }
+
+    ReadOnlyHandlerAlwaysFalse::ReadOnlyHandlerAlwaysFalse()
+    {
+        auto editorEntityContextId = AzFramework::EntityContextId::CreateNull();
+        EditorEntityContextRequestBus::BroadcastResult(editorEntityContextId, &EditorEntityContextRequests::GetEditorEntityContextId);
+
+        ReadOnlyEntityQueryRequestBus::Handler::BusConnect(editorEntityContextId);
+    }
+
+    ReadOnlyHandlerAlwaysFalse::~ReadOnlyHandlerAlwaysFalse()
+    {
+        ReadOnlyEntityQueryRequestBus::Handler::BusDisconnect();
+
+        if (auto readOnlyEntityQueryInterface = AZ::Interface<ReadOnlyEntityQueryInterface>::Get())
+        {
+            readOnlyEntityQueryInterface->RefreshReadOnlyStateForAllEntities();
+        }
+    }
+
+    ReadOnlyHandlerEntityId::ReadOnlyHandlerEntityId(AZ::EntityId entityId)
+        : m_entityId(entityId)
+    {
+        auto editorEntityContextId = AzFramework::EntityContextId::CreateNull();
+        EditorEntityContextRequestBus::BroadcastResult(editorEntityContextId, &EditorEntityContextRequests::GetEditorEntityContextId);
+
+        ReadOnlyEntityQueryRequestBus::Handler::BusConnect(editorEntityContextId);
+    }
+
+    ReadOnlyHandlerEntityId::~ReadOnlyHandlerEntityId()
+    {
+        ReadOnlyEntityQueryRequestBus::Handler::BusDisconnect();
+
+        if (auto readOnlyEntityQueryInterface = AZ::Interface<ReadOnlyEntityQueryInterface>::Get())
+        {
+            readOnlyEntityQueryInterface->RefreshReadOnlyStateForAllEntities();
+        }
+    }
+
+    void ReadOnlyHandlerEntityId::IsReadOnly(const AZ::EntityId& entityId, bool& isReadOnly)
+    {
+        if (entityId == m_entityId)
+        {
+            isReadOnly = true;
+        }
+    }
+}

Code/Framework/AzToolsFramework/Tests/Entity/ReadOnly/ReadOnlyEntityFixture.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Component/TransformBus.h>
+#include <AzCore/UnitTest/TestTypes.h>
+
+#include <AzTest/AzTest.h>
+
+#include <AzToolsFramework/UnitTest/AzToolsFrameworkTestHelpers.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityBus.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityInterface.h>
+
+namespace AzToolsFramework
+{
+    class ReadOnlyEntityFixture
+        : public UnitTest::ToolsApplicationFixture
+    {
+    protected:
+        void SetUpEditorFixtureImpl() override;
+        void TearDownEditorFixtureImpl() override;
+
+        void GenerateTestHierarchy();
+        AZ::EntityId CreateEditorEntity(const char* name, AZ::EntityId parentId);
+
+        AZStd::unordered_map<AZStd::string, AZ::EntityId> m_entityMap;
+
+        ReadOnlyEntityPublicInterface* m_readOnlyEntityPublicInterface = nullptr;
+
+    public:
+        inline static const char* RootEntityName = "Root";
+        inline static const char* ChildEntityName = "Child";
+        inline static const char* GrandChild1EntityName = "GrandChild1";
+        inline static const char* GrandChild2EntityName = "GrandChild2";
+    };
+
+    class ReadOnlyHandlerAlwaysTrue
+        : public ReadOnlyEntityQueryRequestBus::Handler
+    {
+    public:
+        ReadOnlyHandlerAlwaysTrue();
+        ~ReadOnlyHandlerAlwaysTrue();
+
+        // ReadOnlyEntityQueryNotificationBus overrides ...
+        void IsReadOnly(const AZ::EntityId& entityId, bool& isReadOnly) override;
+    };
+
+    class ReadOnlyHandlerAlwaysFalse
+        : public ReadOnlyEntityQueryRequestBus::Handler
+    {
+    public:
+        ReadOnlyHandlerAlwaysFalse();
+        ~ReadOnlyHandlerAlwaysFalse();
+
+        // ReadOnlyEntityQueryNotificationBus overrides ...
+        void IsReadOnly([[maybe_unused]] const AZ::EntityId& entityId, [[maybe_unused]] bool& isReadOnly) override {}
+    };
+
+    class ReadOnlyHandlerEntityId
+        : public ReadOnlyEntityQueryRequestBus::Handler
+    {
+    public:
+        ReadOnlyHandlerEntityId(AZ::EntityId entityId);
+        ~ReadOnlyHandlerEntityId();
+
+        // ReadOnlyEntityQueryNotificationBus overrides ...
+        void IsReadOnly(const AZ::EntityId& entityId, bool& isReadOnly) override;
+
+    private:
+        AZ::EntityId m_entityId;
+    };
+}

Code/Framework/AzToolsFramework/Tests/Entity/ReadOnly/ReadOnlyEntityTests.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <Tests/Entity/ReadOnly/ReadOnlyEntityFixture.h>
+
+namespace AzToolsFramework
+{
+    TEST_F(ReadOnlyEntityFixture, NoHandlerEntityIsNotReadOnlyByDefault)
+    {
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, SingleHandlerEntityIsReadOnly)
+    {
+        // Create a handler that sets all entities to read-only.
+        ReadOnlyHandlerAlwaysTrue alwaysTrueHandler;
+
+        // All entities should be marked read-only now.
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[RootEntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild1EntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild2EntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, SingleHandlerEntityIsNotReadOnly)
+    {
+        // Create a handler that sets all entities to read-only.
+        ReadOnlyHandlerAlwaysFalse alwaysFalseHandler;
+
+        // All entities should not be marked read-only now.
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[RootEntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild1EntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild2EntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, SingleHandlerWithLogic)
+    {
+        // Create a handler that sets just the child entity to read-only.
+        ReadOnlyHandlerEntityId entityIdHandler(m_entityMap[ChildEntityName]);
+
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[RootEntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild1EntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild2EntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, TwoHandlersCanOverlap)
+    {
+        // Create two handlers that set different entities to read-only.
+        ReadOnlyHandlerEntityId entityIdHandler1(m_entityMap[ChildEntityName]);
+        ReadOnlyHandlerEntityId entityIdHandler2(m_entityMap[GrandChild2EntityName]);
+
+        // Both entities should be marked as read-only, while others aren't.
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[RootEntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild1EntityName]));
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[GrandChild2EntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, EnsureCacheIsRefreshedCorrectly)
+    {
+        // Verify the child entity is not marked as read-only
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+
+        // Create a handler that sets the child entity to read-only.
+        ReadOnlyHandlerEntityId entityIdHandler(m_entityMap[ChildEntityName]);
+
+        // Communicate to the ReadOnlyEntitySystemComponent that the read-only state for the child entity may have changed.
+        // Note that this operation would usually be executed by the handler, hence the Query interface call.
+        if (auto readOnlyEntityQueryInterface = AZ::Interface<ReadOnlyEntityQueryInterface>::Get())
+        {
+            readOnlyEntityQueryInterface->RefreshReadOnlyState({ m_entityMap[ChildEntityName] });
+        }
+
+        // Verify the child entity is marked as read-only
+        EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+    }
+
+    TEST_F(ReadOnlyEntityFixture, EnsureCacheIsClearedCorrectly)
+    {
+        {
+            // Create a handler that sets the child entity to read-only.
+            ReadOnlyHandlerEntityId entityIdHandler(m_entityMap[ChildEntityName]);
+
+            // Verify the child entity is marked as read-only
+            EXPECT_TRUE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+        }
+        // When the handler goes out of scope, it calls RefreshReadOnlyStateForAllEntities and refreshes the cache.
+
+        // Verify the child entity is no longer marked as read-only
+        EXPECT_FALSE(m_readOnlyEntityPublicInterface->IsReadOnly(m_entityMap[ChildEntityName]));
+    }
+}

Code/Framework/AzToolsFramework/Tests/Prefab/PrefabDeleteTests.cpp

@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzCore/Settings/SettingsRegistryMergeUtils.h>
+#include <AzToolsFramework/Entity/EditorEntityHelpers.h>
+#include <AzToolsFramework/ToolsComponents/TransformComponent.h>
+
+#include <Prefab/PrefabTestComponent.h>
+#include <Prefab/PrefabTestDomUtils.h>
+#include <Prefab/PrefabTestFixture.h>
+
+namespace UnitTest
+{
+    using PrefabDeleteTest = PrefabTestFixture;
+
+    TEST_F(PrefabDeleteTest, DeleteEntitiesInInstance_DeleteSingleEntitySucceeds)
+    {
+        PrefabEntityResult createEntityResult = m_prefabPublicInterface->CreateEntity(AZ::EntityId(), AZ::Vector3());
+
+        // Verify that a valid entity is created.
+        AZ::EntityId testEntityId = createEntityResult.GetValue();
+        ASSERT_TRUE(testEntityId.IsValid());
+        AZ::Entity* testEntity = AzToolsFramework::GetEntityById(testEntityId);
+        ASSERT_TRUE(testEntity != nullptr);
+
+        m_prefabPublicInterface->DeleteEntitiesInInstance(AzToolsFramework::EntityIdList{ testEntityId });
+
+        // Verify that entity can't be found after deletion.
+        testEntity = AzToolsFramework::GetEntityById(testEntityId);
+        EXPECT_TRUE(testEntity == nullptr);
+    }
+
+    TEST_F(PrefabDeleteTest, DeleteEntitiesInInstance_DeleteSinglePrefabSucceeds)
+    {
+        PrefabEntityResult createEntityResult = m_prefabPublicInterface->CreateEntity(AZ::EntityId(), AZ::Vector3());
+
+        // Verify that a valid entity is created.
+        AZ::EntityId createdEntityId = createEntityResult.GetValue();
+        ASSERT_TRUE(createdEntityId.IsValid());
+        AZ::Entity* createdEntity = AzToolsFramework::GetEntityById(createdEntityId);
+        ASSERT_TRUE(createdEntity != nullptr);
+
+        // Rather than hardcode a path, use a path from settings registry since that will work on all platforms.
+        AZ::SettingsRegistryInterface* registry = AZ::SettingsRegistry::Get();
+        AZ::IO::FixedMaxPath path;
+        registry->Get(path.Native(), AZ::SettingsRegistryMergeUtils::FilePathKey_EngineRootFolder);
+        CreatePrefabResult createPrefabResult =
+            m_prefabPublicInterface->CreatePrefabInMemory(AzToolsFramework::EntityIdList{ createdEntityId }, path);
+
+        AZ::EntityId createdPrefabContainerId = createPrefabResult.GetValue();
+        ASSERT_TRUE(createdPrefabContainerId.IsValid());
+        AZ::Entity* prefabContainerEntity = AzToolsFramework::GetEntityById(createdPrefabContainerId);
+        ASSERT_TRUE(prefabContainerEntity != nullptr);
+
+        // Verify that the prefab container entity and the entity within are deleted.
+        m_prefabPublicInterface->DeleteEntitiesInInstance(AzToolsFramework::EntityIdList{ createdPrefabContainerId });
+        prefabContainerEntity = AzToolsFramework::GetEntityById(createdPrefabContainerId);
+        EXPECT_TRUE(prefabContainerEntity == nullptr);
+        createdEntity = AzToolsFramework::GetEntityById(createdEntityId);
+        EXPECT_TRUE(createdEntity == nullptr);
+    }
+
+    TEST_F(PrefabDeleteTest, DeleteEntitiesAndAllDescendantsInInstance_DeletingEntityDeletesChildEntityToo)
+    {
+        PrefabEntityResult parentEntityCreationResult = m_prefabPublicInterface->CreateEntity(AZ::EntityId(), AZ::Vector3());
+
+        // Verify that valid parent entity is created.
+        AZ::EntityId parentEntityId = parentEntityCreationResult.GetValue();
+        ASSERT_TRUE(parentEntityId.IsValid());
+        AZ::Entity* parentEntity = AzToolsFramework::GetEntityById(parentEntityId);
+        ASSERT_TRUE(parentEntity != nullptr);
+
+        // Verify that valid child entity is created.
+        PrefabEntityResult childEntityCreationResult = m_prefabPublicInterface->CreateEntity(parentEntityId, AZ::Vector3());
+        AZ::EntityId childEntityId = childEntityCreationResult.GetValue();
+        ASSERT_TRUE(childEntityId.IsValid());
+        AZ::Entity* childEntity = AzToolsFramework::GetEntityById(childEntityId);
+        ASSERT_TRUE(childEntity != nullptr);
+
+        // PrefabTestFixture won't add required editor components by default. Hence we add them here.
+        AddRequiredEditorComponents(childEntity);
+        AddRequiredEditorComponents(parentEntity);
+
+        // Parent the child entity under the parent entity.
+        AZ::TransformBus::Event(childEntityId, &AZ::TransformBus::Events::SetParent, parentEntityId);
+
+        // Delete parent entity and its children.
+        m_prefabPublicInterface->DeleteEntitiesAndAllDescendantsInInstance(AzToolsFramework::EntityIdList{ parentEntityId });
+
+        // Verify that both the parent and child entities are deleted.
+        parentEntity = AzToolsFramework::GetEntityById(parentEntityId);
+        EXPECT_TRUE(parentEntity == nullptr);
+        childEntity = AzToolsFramework::GetEntityById(childEntityId);
+        EXPECT_TRUE(childEntity == nullptr);
+    }
+
+    TEST_F(PrefabDeleteTest, DeleteEntitiesAndAllDescendantsInInstance_DeletingEntityDeletesChildPrefabToo)
+    {
+        PrefabEntityResult entityToBePutUnderPrefabResult = m_prefabPublicInterface->CreateEntity(AZ::EntityId(), AZ::Vector3());
+
+        // Verify that a valid entity is created that will be put in a prefab later.
+        AZ::EntityId entityToBePutUnderPrefabId = entityToBePutUnderPrefabResult.GetValue();
+        ASSERT_TRUE(entityToBePutUnderPrefabId.IsValid());
+        AZ::Entity* entityToBePutUnderPrefab = AzToolsFramework::GetEntityById(entityToBePutUnderPrefabId);
+        ASSERT_TRUE(entityToBePutUnderPrefab != nullptr);
+
+        // Verify that a valid parent entity is created.
+        PrefabEntityResult parentEntityCreationResult = m_prefabPublicInterface->CreateEntity(AZ::EntityId(), AZ::Vector3());
+        AZ::EntityId parentEntityId = parentEntityCreationResult.GetValue();
+        ASSERT_TRUE(parentEntityId.IsValid());
+        AZ::Entity* parentEntity = AzToolsFramework::GetEntityById(parentEntityId);
+        ASSERT_TRUE(parentEntity != nullptr);
+
+        // Rather than hardcode a path, use a path from settings registry since that will work on all platforms.
+        AZ::SettingsRegistryInterface* registry = AZ::SettingsRegistry::Get();
+        AZ::IO::FixedMaxPath path;
+        registry->Get(path.Native(), AZ::SettingsRegistryMergeUtils::FilePathKey_EngineRootFolder);
+        CreatePrefabResult createPrefabResult =
+            m_prefabPublicInterface->CreatePrefabInMemory(AzToolsFramework::EntityIdList{ entityToBePutUnderPrefabId }, path);
+
+        // Verify that a valid prefab container entity is created.
+        AZ::EntityId createdPrefabContainerId = createPrefabResult.GetValue();
+        ASSERT_TRUE(createdPrefabContainerId.IsValid());
+        AZ::Entity* prefabContainerEntity = AzToolsFramework::GetEntityById(createdPrefabContainerId);
+        ASSERT_TRUE(prefabContainerEntity != nullptr);
+
+        // PrefabTestFixture won't add required editor components by default. Hence we add them here.
+        AddRequiredEditorComponents(parentEntity);
+        AddRequiredEditorComponents(prefabContainerEntity);
+
+        // Parent the prefab under the parent entity.
+        AZ::TransformBus::Event(createdPrefabContainerId, &AZ::TransformBus::Events::SetParent, parentEntityId);
+
+        // Delete the parent entity.
+        m_prefabPublicInterface->DeleteEntitiesAndAllDescendantsInInstance(AzToolsFramework::EntityIdList{ parentEntityId });
+
+        // Validate that the parent and the prefab under it and the entity inside the prefab are all deleted.
+        parentEntity = AzToolsFramework::GetEntityById(parentEntityId);
+        ASSERT_TRUE(parentEntity == nullptr);
+        entityToBePutUnderPrefab = AzToolsFramework::GetEntityById(entityToBePutUnderPrefabId);
+        ASSERT_TRUE(entityToBePutUnderPrefab == nullptr);
+        prefabContainerEntity = AzToolsFramework::GetEntityById(createdPrefabContainerId);
+        EXPECT_TRUE(prefabContainerEntity == nullptr);
+    }
+} // namespace UnitTest

Code/Framework/AzToolsFramework/Tests/Prefab/PrefabTestFixture.cpp

@@ -57,6 +57,11 @@ namespace UnitTest
         return AZStd::make_unique<PrefabTestToolsApplication>("PrefabTestApplication");
     }
 
+    void PrefabTestFixture::PropagateAllTemplateChanges()
+    {
+        m_prefabSystemComponent->OnSystemTick();
+    }
+
     AZ::Entity* PrefabTestFixture::CreateEntity(const char* entityName, const bool shouldActivate)
     {
         // Circumvent the EntityContext system and generate a new entity with a transformcomponent
@@ -125,4 +130,13 @@ namespace UnitTest
             EXPECT_EQ(entityInInstance->GetState(), AZ::Entity::State::Active);
         }
     }
+
+    void PrefabTestFixture::AddRequiredEditorComponents(AZ::Entity* entity)
+    {
+        ASSERT_TRUE(entity != nullptr);
+        entity->Deactivate();
+        AzToolsFramework::EditorEntityContextRequestBus::Broadcast(
+            &AzToolsFramework::EditorEntityContextRequests::AddRequiredComponents, *entity);
+        entity->Activate();
+    }
 }

Code/Framework/AzToolsFramework/Tests/Prefab/PrefabTestFixture.h

@@ -52,6 +52,8 @@ namespace UnitTest
 
         AZStd::unique_ptr<ToolsTestApplication> CreateTestApplication() override;
 
+        void PropagateAllTemplateChanges();
+
         AZ::Entity* CreateEntity(const char* entityName, const bool shouldActivate = true);
 
         void CompareInstances(const Instance& instanceA, const Instance& instanceB, bool shouldCompareLinkIds = true,
@@ -62,6 +64,8 @@ namespace UnitTest
         //! Validates that all entities within a prefab instance are in 'Active' state.
         void ValidateInstanceEntitiesActive(Instance& instance);
 
+        void AddRequiredEditorComponents(AZ::Entity* entity);
+
         PrefabSystemComponent* m_prefabSystemComponent = nullptr;
         PrefabLoaderInterface* m_prefabLoaderInterface = nullptr;
         PrefabPublicInterface* m_prefabPublicInterface = nullptr;

Code/Framework/AzToolsFramework/Tests/UI/EntityOutlinerTests.cpp

@@ -128,7 +128,7 @@ namespace UnitTest
         void ProcessDeferredUpdates()
         {
             // Force a prefab propagation for updates that are deferred to the next tick.
-            m_prefabSystemComponent->OnSystemTick();
+            PropagateAllTemplateChanges();
 
             // Ensure the model process its entity update queue
             m_model->ProcessEntityUpdates();

Code/Framework/AzToolsFramework/Tests/aztoolsframeworktests_files.cmake

@@ -28,6 +28,9 @@ set(FILES
     Entity/EditorEntitySearchComponentTests.cpp
     Entity/EditorEntitySelectionTests.cpp
     Entity/EntityUtilityComponentTests.cpp
+    Entity/ReadOnly/ReadOnlyEntityFixture.cpp
+    Entity/ReadOnly/ReadOnlyEntityFixture.h
+    Entity/ReadOnly/ReadOnlyEntityTests.cpp
     EntityIdQLabelTests.cpp
     EntityInspectorTests.cpp
     EntityOwnershipService/EntityOwnershipServiceTestFixture.cpp
@@ -66,6 +69,7 @@ set(FILES
     Prefab/PrefabFocus/PrefabFocusTests.cpp
     Prefab/MockPrefabFileIOActionValidator.cpp
     Prefab/MockPrefabFileIOActionValidator.h
+    Prefab/PrefabDeleteTests.cpp
     Prefab/PrefabDuplicateTests.cpp
     Prefab/PrefabEntityAliasTests.cpp
     Prefab/PrefabInstanceToTemplatePropagatorTests.cpp