Merge branch 'development' of https://github.com/aws-lumberyard-dev/o3de into mnaumov/2372

Code/Framework/AzToolsFramework/AzToolsFramework/API/ToolsApplicationAPI.h

@@ -600,8 +600,8 @@ namespace AzToolsFramework
          * Open 3D Engine Internal use only.
          *
          * Run a specific redo command separate from the undo/redo system.
-         * In many cases before a modifcation on an entity takes place, it is first packaged into 
-         * undo/redo commands. Running the modification's redo command separete from the undo/redo 
+         * In many cases before a modification on an entity takes place, it is first packaged into 
+         * undo/redo commands. Running the modification's redo command separate from the undo/redo 
          * system simulates its execution, and avoids some code duplication.
          */
         virtual void RunRedoSeparately(UndoSystem::URSequencePoint* redoCommand) = 0;
@@ -841,9 +841,6 @@ namespace AzToolsFramework
          */
         virtual AZStd::string GetComponentIconPath(const AZ::Uuid& /*componentType*/, AZ::Crc32 /*componentIconAttrib*/, AZ::Component* /*component*/) { return AZStd::string(); }
 
-        /// Resource Selector hook, returns a path for a resource.
-        virtual AZStd::string SelectResource(const AZStd::string& /*resourceType*/, const AZStd::string& /*previousValue*/) { return AZStd::string(); }
-
         /**
          * Calculate the navigation 2D radius in units of an agent given its Navigation Type Name
          * @param angentTypeName         the name that identifies the agent navigation type

Code/Framework/AzToolsFramework/AzToolsFramework/API/ViewPaneOptions.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <AzCore/RTTI/TypeInfo.h>
+#include <AzCore/RTTI/TypeInfoSimple.h>
 
 #include <QRect>
 #include <QKeySequence>

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

@@ -1781,5 +1781,4 @@ namespace AzToolsFramework
     { 
         appType.m_maskValue = AZ::ApplicationTypeQuery::Masks::Tool;
     };
-
 } // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Asset/AssetDebugInfo.h

@@ -11,7 +11,7 @@
 #include <AzCore/Asset/AssetManagerBus.h>
 #include <AzCore/IO/FileIO.h>
 #include <AzCore/Outcome/Outcome.h>
-#include <AzCore/RTTI/TypeInfo.h>
+#include <AzCore/RTTI/TypeInfoSimple.h>
 #include <AzCore/std/containers/map.h>
 #include <AzCore/std/containers/set.h>
 #include <AzCore/std/containers/vector.h>

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/Instance/InstanceToTemplatePropagator.cpp

@@ -46,7 +46,6 @@ namespace AzToolsFramework
 
         bool InstanceToTemplatePropagator::GenerateDomForEntity(PrefabDom& generatedEntityDom, const AZ::Entity& entity)
         {
-            //grab the owning instance so we can use the entityIdMapper in settings
             InstanceOptionalReference owningInstance = m_instanceEntityMapperInterface->FindOwningInstance(entity.GetId());
 
             if (!owningInstance)
@@ -54,19 +53,8 @@ namespace AzToolsFramework
                 AZ_Error("Prefab", false, "Entity does not belong to an instance");
                 return false;
             }
-            
-            InstanceEntityIdMapper entityIdMapper;
-            entityIdMapper.SetStoringInstance(owningInstance->get());
 
-            //create settings so that the serialized entity dom undergoes mapping from entity id to entity alias
-            AZ::JsonSerializerSettings settings;
-            settings.m_metadata.Add(static_cast<AZ::JsonEntityIdSerializer::JsonEntityIdMapper*>(&entityIdMapper));
-
-            //generate PrefabDom using Json serialization system
-            AZ::JsonSerializationResult::ResultCode result = AZ::JsonSerialization::Store(
-                generatedEntityDom, generatedEntityDom.GetAllocator(), entity, settings);
-
-            return result.GetOutcome() == AZ::JsonSerializationResult::Outcomes::Success;
+            return PrefabDomUtils::StoreEntityInPrefabDomFormat(entity, owningInstance->get(), generatedEntityDom);
         }
 
         bool InstanceToTemplatePropagator::GenerateDomForInstance(PrefabDom& generatedInstanceDom, const Prefab::Instance& instance)
@@ -185,8 +173,10 @@ namespace AzToolsFramework
             else
             {
                 AZ_Error(
-                    "Prefab", result.GetOutcome() != AZ::JsonSerializationResult::Outcomes::PartialSkip,
-                    "Some of the patches are not successfully applied.");
+                    "Prefab",
+                    (result.GetOutcome() != AZ::JsonSerializationResult::Outcomes::Skipped) &&
+                    (result.GetOutcome() != AZ::JsonSerializationResult::Outcomes::PartialSkip),
+                    "Some of the patches were not successfully applied.");
                 m_prefabSystemComponentInterface->SetTemplateDirtyFlag(templateId, true);
                 m_prefabSystemComponentInterface->PropagateTemplateChanges(templateId, instanceToExclude);
                 return true;

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/Link/Link.cpp

@@ -196,7 +196,8 @@ namespace AzToolsFramework
                         m_sourceTemplateId, m_targetTemplateId);
                     return false;
                 }
-                if (applyPatchResult.GetOutcome() == AZ::JsonSerializationResult::Outcomes::PartialSkip)
+                if (applyPatchResult.GetOutcome() == AZ::JsonSerializationResult::Outcomes::PartialSkip ||
+                    applyPatchResult.GetOutcome() == AZ::JsonSerializationResult::Outcomes::Skipped)
                 {
                     AZ_Error(
                         "Prefab", false,

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabDomUtils.cpp

@@ -26,6 +26,30 @@ namespace AzToolsFramework
     {
         namespace PrefabDomUtils
         {
+            namespace Internal
+            {
+                AZ::JsonSerializationResult::ResultCode JsonIssueReporter(AZStd::string& scratchBuffer,
+                    AZStd::string_view message, AZ::JsonSerializationResult::ResultCode result, AZStd::string_view path)
+                {
+                    namespace JSR = AZ::JsonSerializationResult;
+
+                    if (result.GetProcessing() == JSR::Processing::Halted)
+                    {
+                        scratchBuffer.append(message.begin(), message.end());
+                        scratchBuffer.append("\n    Reason: ");
+                        result.AppendToString(scratchBuffer, path);
+                        scratchBuffer.append(".");
+                        AZ_Warning("Prefab Serialization", false, "%s", scratchBuffer.c_str());
+
+                        scratchBuffer.clear();
+
+                        return JSR::ResultCode(result.GetTask(), JSR::Outcomes::Skipped);
+                    }
+
+                    return result;
+                }
+            }
+
             PrefabDomValueReference FindPrefabDomValue(PrefabDomValue& parentValue, const char* valueName)
             {
                 PrefabDomValue::MemberIterator valueIterator = parentValue.FindMember(valueName);
@@ -48,7 +72,7 @@ namespace AzToolsFramework
                 return valueIterator->value;
             }
 
-            bool StoreInstanceInPrefabDom(const Instance& instance, PrefabDom& prefabDom, StoreInstanceFlags flags)
+            bool StoreInstanceInPrefabDom(const Instance& instance, PrefabDom& prefabDom, StoreFlags flags)
             {
                 InstanceEntityIdMapper entityIdMapper;
                 entityIdMapper.SetStoringInstance(instance);
@@ -59,17 +83,27 @@ namespace AzToolsFramework
                 settings.m_metadata.Add(static_cast<AZ::JsonEntityIdSerializer::JsonEntityIdMapper*>(&entityIdMapper));
                 settings.m_metadata.Add(&entityIdMapper);
 
-                if ((flags & StoreInstanceFlags::StripDefaultValues) != StoreInstanceFlags::StripDefaultValues)
+                if ((flags & StoreFlags::StripDefaultValues) != StoreFlags::StripDefaultValues)
                 {
                     settings.m_keepDefaults = true;
                 }
 
-                if ((flags & StoreInstanceFlags::StoreLinkIds) != StoreInstanceFlags::None)
+                if ((flags & StoreFlags::StoreLinkIds) != StoreFlags::None)
                 {
                     LinkIdMetadata linkIdMetadata;
                     settings.m_metadata.Add(&linkIdMetadata);
                 }
 
+                AZStd::string scratchBuffer;
+                auto issueReportingCallback = [&scratchBuffer]
+                (AZStd::string_view message, AZ::JsonSerializationResult::ResultCode result,
+                 AZStd::string_view path) -> AZ::JsonSerializationResult::ResultCode
+                {
+                    return Internal::JsonIssueReporter(scratchBuffer, message, result, path);
+                };
+
+                settings.m_reporting = AZStd::move(issueReportingCallback);
+
                 AZ::JsonSerializationResult::ResultCode result =
                     AZ::JsonSerialization::Store(prefabDom, prefabDom.GetAllocator(), instance, settings);
 
@@ -86,7 +120,38 @@ namespace AzToolsFramework
                 return true;
             }
 
-            bool LoadInstanceFromPrefabDom(Instance& instance, const PrefabDom& prefabDom, LoadInstanceFlags flags)
+            bool StoreEntityInPrefabDomFormat(const AZ::Entity& entity, Instance& owningInstance, PrefabDom& prefabDom, StoreFlags flags)
+            {
+                InstanceEntityIdMapper entityIdMapper;
+                entityIdMapper.SetStoringInstance(owningInstance);
+
+                //create settings so that the serialized entity dom undergoes mapping from entity id to entity alias
+                AZ::JsonSerializerSettings settings;
+                settings.m_metadata.Add(static_cast<AZ::JsonEntityIdSerializer::JsonEntityIdMapper*>(&entityIdMapper));
+
+                if ((flags & StoreFlags::StripDefaultValues) != StoreFlags::StripDefaultValues)
+                {
+                    settings.m_keepDefaults = true;
+                }
+
+                AZStd::string scratchBuffer;
+                auto issueReportingCallback = [&scratchBuffer]
+                (AZStd::string_view message, AZ::JsonSerializationResult::ResultCode result,
+                    AZStd::string_view path) -> AZ::JsonSerializationResult::ResultCode
+                {
+                    return Internal::JsonIssueReporter(scratchBuffer, message, result, path);
+                };
+
+                settings.m_reporting = AZStd::move(issueReportingCallback);
+
+                //generate PrefabDom using Json serialization system
+                AZ::JsonSerializationResult::ResultCode result = AZ::JsonSerialization::Store(
+                    prefabDom, prefabDom.GetAllocator(), entity, settings);
+
+                return result.GetOutcome() == AZ::JsonSerializationResult::Outcomes::Success;
+            }
+
+            bool LoadInstanceFromPrefabDom(Instance& instance, const PrefabDom& prefabDom, LoadFlags flags)
             {
                 // When entities are rebuilt they are first destroyed. As a result any assets they were exclusively holding on to will
                 // be released and reloaded once the entities are built up again. By suspending asset release temporarily the asset reload
@@ -95,7 +160,7 @@ namespace AzToolsFramework
 
                 InstanceEntityIdMapper entityIdMapper;
                 entityIdMapper.SetLoadingInstance(instance);
-                if ((flags & LoadInstanceFlags::AssignRandomEntityId) == LoadInstanceFlags::AssignRandomEntityId)
+                if ((flags & LoadFlags::AssignRandomEntityId) == LoadFlags::AssignRandomEntityId)
                 {
                     entityIdMapper.SetEntityIdGenerationApproach(InstanceEntityIdMapper::EntityIdGenerationApproach::Random);
                 }
@@ -125,7 +190,7 @@ namespace AzToolsFramework
             }
 
             bool LoadInstanceFromPrefabDom(
-                Instance& instance, const PrefabDom& prefabDom, AZStd::vector<AZ::Data::Asset<AZ::Data::AssetData>>& referencedAssets, LoadInstanceFlags flags)
+                Instance& instance, const PrefabDom& prefabDom, AZStd::vector<AZ::Data::Asset<AZ::Data::AssetData>>& referencedAssets, LoadFlags flags)
             {
                 // When entities are rebuilt they are first destroyed. As a result any assets they were exclusively holding on to will
                 // be released and reloaded once the entities are built up again. By suspending asset release temporarily the asset reload
@@ -134,7 +199,7 @@ namespace AzToolsFramework
 
                 InstanceEntityIdMapper entityIdMapper;
                 entityIdMapper.SetLoadingInstance(instance);
-                if ((flags & LoadInstanceFlags::AssignRandomEntityId) == LoadInstanceFlags::AssignRandomEntityId)
+                if ((flags & LoadFlags::AssignRandomEntityId) == LoadFlags::AssignRandomEntityId)
                 {
                     entityIdMapper.SetEntityIdGenerationApproach(InstanceEntityIdMapper::EntityIdGenerationApproach::Random);
                 }
@@ -167,7 +232,7 @@ namespace AzToolsFramework
             }
 
             bool LoadInstanceFromPrefabDom(
-                Instance& instance, Instance::EntityList& newlyAddedEntities, const PrefabDom& prefabDom, LoadInstanceFlags flags)
+                Instance& instance, Instance::EntityList& newlyAddedEntities, const PrefabDom& prefabDom, LoadFlags flags)
             {
                 // When entities are rebuilt they are first destroyed. As a result any assets they were exclusively holding on to will
                 // be released and reloaded once the entities are built up again. By suspending asset release temporarily the asset reload
@@ -176,7 +241,7 @@ namespace AzToolsFramework
 
                 InstanceEntityIdMapper entityIdMapper;
                 entityIdMapper.SetLoadingInstance(instance);
-                if ((flags & LoadInstanceFlags::AssignRandomEntityId) == LoadInstanceFlags::AssignRandomEntityId)
+                if ((flags & LoadFlags::AssignRandomEntityId) == LoadFlags::AssignRandomEntityId)
                 {
                     entityIdMapper.SetEntityIdGenerationApproach(InstanceEntityIdMapper::EntityIdGenerationApproach::Random);
                 }
@@ -246,15 +311,12 @@ namespace AzToolsFramework
             AZ::JsonSerializationResult::ResultCode ApplyPatches(
                 PrefabDomValue& prefabDomToApplyPatchesOn, PrefabDom::AllocatorType& allocator, const PrefabDomValue& patches)
             {
-                auto issueReportingCallback = [](AZStd::string_view, AZ::JsonSerializationResult::ResultCode result,
-                                                 AZStd::string_view) -> AZ::JsonSerializationResult::ResultCode
+                AZStd::string scratchBuffer;
+                auto issueReportingCallback = [&scratchBuffer]
+                (AZStd::string_view message, AZ::JsonSerializationResult::ResultCode result,
+                    AZStd::string_view path) -> AZ::JsonSerializationResult::ResultCode
                 {
-                    using namespace AZ::JsonSerializationResult;
-                    if (result.GetProcessing() == Processing::Halted)
-                    {
-                        return ResultCode(result.GetTask(), Outcomes::PartialSkip);
-                    }
-                    return result;
+                    return Internal::JsonIssueReporter(scratchBuffer, message, result, path);
                 };
 
                 AZ::JsonApplyPatchSettings applyPatchSettings;

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabDomUtils.h

@@ -38,7 +38,7 @@ namespace AzToolsFramework
             PrefabDomValueReference FindPrefabDomValue(PrefabDomValue& parentValue, const char* valueName);
             PrefabDomValueConstReference FindPrefabDomValue(const PrefabDomValue& parentValue, const char* valueName);
 
-            enum class StoreInstanceFlags : uint8_t
+            enum class StoreFlags : uint8_t
             {
                 //! No flags used during the call to LoadInstanceFromPrefabDom.
                 None = 0,
@@ -51,7 +51,7 @@ namespace AzToolsFramework
                 //! linkIds to instance dom so any nested prefabs will have linkIds correctly set.
                 StoreLinkIds = 1 << 1
             };
-            AZ_DEFINE_ENUM_BITWISE_OPERATORS(StoreInstanceFlags);
+            AZ_DEFINE_ENUM_BITWISE_OPERATORS(StoreFlags);
 
             /**
             * Stores a valid Prefab Instance within a Prefab Dom. Useful for generating Templates
@@ -60,9 +60,21 @@ namespace AzToolsFramework
             * @param flags Controls behavior such as whether to store default values
             * @return bool on whether the operation succeeded
             */
-            bool StoreInstanceInPrefabDom(const Instance& instance, PrefabDom& prefabDom, StoreInstanceFlags flags = StoreInstanceFlags::None);
+            bool StoreInstanceInPrefabDom(const Instance& instance, PrefabDom& prefabDom, StoreFlags flags = StoreFlags::None);
 
-            enum class LoadInstanceFlags : uint8_t
+            /**
+            * Stores a valid entity in Prefab Dom format.
+            * @param entity The entity to store
+            * @param owningInstance The instance owning the passed in entity.
+            *                       Used for contextualizing the entity's place in a Prefab hierarchy.
+            * @param prefabDom The prefabDom that will be used to store the entity data
+            * @param flags controls behavior such as whether to store default values
+            * @return bool on whether the operation succeeded
+            */
+            bool StoreEntityInPrefabDomFormat(const AZ::Entity& entity, Instance& owningInstance, PrefabDom& prefabDom,
+                StoreFlags flags = StoreFlags::None);
+
+            enum class LoadFlags : uint8_t
             {
                 //! No flags used during the call to LoadInstanceFromPrefabDom.
                 None = 0,
@@ -70,7 +82,7 @@ namespace AzToolsFramework
                 //! unique, e.g. when they are duplicates of live entities, this flag will assign them a random new id.
                 AssignRandomEntityId = 1 << 0
             };
-            AZ_DEFINE_ENUM_BITWISE_OPERATORS(LoadInstanceFlags);
+            AZ_DEFINE_ENUM_BITWISE_OPERATORS(LoadFlags);
 
             /**
             * Loads a valid Prefab Instance from a Prefab Dom. Useful for generating Instances.
@@ -80,7 +92,7 @@ namespace AzToolsFramework
             * @return bool on whether the operation succeeded.
             */
             bool LoadInstanceFromPrefabDom(
-                Instance& instance, const PrefabDom& prefabDom, LoadInstanceFlags flags = LoadInstanceFlags::None);
+                Instance& instance, const PrefabDom& prefabDom, LoadFlags flags = LoadFlags::None);
 
             /**
             * Loads a valid Prefab Instance from a Prefab Dom. Useful for generating Instances.
@@ -92,7 +104,7 @@ namespace AzToolsFramework
             */
             bool LoadInstanceFromPrefabDom(
                 Instance& instance, const PrefabDom& prefabDom, AZStd::vector<AZ::Data::Asset<AZ::Data::AssetData>>& referencedAssets,
-                LoadInstanceFlags flags = LoadInstanceFlags::None);
+                LoadFlags flags = LoadFlags::None);
 
             /**
             * Loads a valid Prefab Instance from a Prefab Dom. Useful for generating Instances.
@@ -105,7 +117,7 @@ namespace AzToolsFramework
             */
             bool LoadInstanceFromPrefabDom(
                 Instance& instance, Instance::EntityList& newlyAddedEntities, const PrefabDom& prefabDom,
-                LoadInstanceFlags flags = LoadInstanceFlags::None);
+                LoadFlags flags = LoadFlags::None);
 
             inline PrefabDomPath GetPrefabDomInstancePath(const char* instanceName)
             {

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabLoader.cpp

@@ -300,7 +300,7 @@ namespace AzToolsFramework
             }
 
             PrefabDom storedPrefabDom(&loadedTemplateDom->get().GetAllocator());
-            if (!PrefabDomUtils::StoreInstanceInPrefabDom(loadedPrefabInstance, storedPrefabDom, PrefabDomUtils::StoreInstanceFlags::StoreLinkIds))
+            if (!PrefabDomUtils::StoreInstanceInPrefabDom(loadedPrefabInstance, storedPrefabDom, PrefabDomUtils::StoreFlags::StoreLinkIds))
             {
                 return false;
             }
@@ -328,7 +328,7 @@ namespace AzToolsFramework
 
             PrefabDom storedPrefabDom(&savingTemplateDom->get().GetAllocator());
             if (!PrefabDomUtils::StoreInstanceInPrefabDom(savingPrefabInstance, storedPrefabDom,
-                PrefabDomUtils::StoreInstanceFlags::StripDefaultValues))
+                PrefabDomUtils::StoreFlags::StripDefaultValues))
             {
                 return false;
             }

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

@@ -61,7 +61,7 @@ namespace AzToolsFramework
             m_prefabUndoCache.Destroy();
         }
 
-        PrefabOperationResult PrefabPublicHandler::CreatePrefab(const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView absolutePath)
+        PrefabOperationResult PrefabPublicHandler::CreatePrefabInMemory(const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath)
         {
             EntityList inputEntityList, topLevelEntities;
             AZ::EntityId commonRootEntityId;
@@ -73,8 +73,6 @@ namespace AzToolsFramework
                 return findCommonRootOutcome;
             }
 
-            AZ_Assert(absolutePath.IsAbsolute(), "CreatePrefab requires an absolute path for saving the initial prefab file.");
-
             InstanceOptionalReference instanceToCreate;
             {
                 // Initialize Undo Batch object
@@ -125,7 +123,7 @@ namespace AzToolsFramework
                     PrefabDom linkPatchesCopy;
                     linkPatchesCopy.CopyFrom(linkPatches->get(), linkPatchesCopy.GetAllocator());
                     nestedInstanceLinkPatchesMap.emplace(nestedInstance, AZStd::move(linkPatchesCopy));
-                    
+
                     RemoveLink(outInstance, commonRootEntityOwningInstance->get().GetTemplateId(), undoBatch.GetUndoBatch());
 
                     instancePtrs.emplace_back(AZStd::move(outInstance));
@@ -139,18 +137,20 @@ namespace AzToolsFramework
                 if (!prefabEditorEntityOwnershipInterface)
                 {
                     return AZ::Failure(AZStd::string("Could not create a new prefab out of the entities provided - internal error "
-                                                     "(PrefabEditorEntityOwnershipInterface unavailable)."));
+                        "(PrefabEditorEntityOwnershipInterface unavailable)."));
                 }
 
                 // Create the Prefab
+                AZ_Assert(filePath.IsAbsolute(), "CreatePrefabInMemory requires an absolute file path.");
+
                 instanceToCreate = prefabEditorEntityOwnershipInterface->CreatePrefab(
-                    entities, AZStd::move(instancePtrs), m_prefabLoaderInterface->GenerateRelativePath(absolutePath),
+                    entities, AZStd::move(instancePtrs), m_prefabLoaderInterface->GenerateRelativePath(filePath),
                     commonRootEntityOwningInstance);
 
                 if (!instanceToCreate)
                 {
                     return AZ::Failure(AZStd::string("Could not create a new prefab out of the entities provided - internal error "
-                                                     "(A null instance is returned)."));
+                        "(A null instance is returned)."));
                 }
 
                 AZ::EntityId containerEntityId = instanceToCreate->get().GetContainerEntityId();
@@ -218,7 +218,7 @@ namespace AzToolsFramework
                         linkUpdate.Redo();
                     }
                 });
-                
+
                 // Create a link between the templates of the newly created instance and the instance it's being parented under.
                 CreateLink(
                     instanceToCreate->get(), commonRootEntityOwningInstance->get().GetTemplateId(), undoBatch.GetUndoBatch(),
@@ -255,18 +255,35 @@ namespace AzToolsFramework
 
                 // Select Container Entity
                 {
-                    auto selectionUndo = aznew SelectionCommand({containerEntityId}, "Select Prefab Container Entity");
+                    auto selectionUndo = aznew SelectionCommand({ containerEntityId }, "Select Prefab Container Entity");
                     selectionUndo->SetParent(undoBatch.GetUndoBatch());
                     ToolsApplicationRequestBus::Broadcast(&ToolsApplicationRequestBus::Events::RunRedoSeparately, selectionUndo);
                 }
             }
 
-            // Save Template to file
-            m_prefabLoaderInterface->SaveTemplateToFile(instanceToCreate->get().GetTemplateId(), absolutePath);
-            
             return AZ::Success();
         }
 
+        PrefabOperationResult PrefabPublicHandler::CreatePrefabInDisk(const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath)
+        {
+            auto result = CreatePrefabInMemory(entityIds, filePath);
+            if (result.IsSuccess())
+            {
+                // Save Template to file
+                auto relativePath = m_prefabLoaderInterface->GenerateRelativePath(filePath);
+                Prefab::TemplateId templateId = m_prefabSystemComponentInterface->GetTemplateIdFromFilePath(relativePath);
+                if (!m_prefabLoaderInterface->SaveTemplateToFile(templateId, filePath))
+                {
+                    AZStd::string_view filePathString(filePath);
+                    return AZ::Failure(AZStd::string::format(
+                        "Could not save the newly created prefab to file path %.*s - internal error ",
+                        AZ_STRING_ARG(filePathString)));
+                }
+            }
+            
+            return result;
+        }
+
         PrefabDom PrefabPublicHandler::ApplyContainerTransformAndGeneratePatch(AZ::EntityId containerEntityId, AZ::EntityId parentEntityId, const EntityList& childEntities)
         {
             AZ::Entity* containerEntity = GetEntityById(containerEntityId);
@@ -301,7 +318,7 @@ namespace AzToolsFramework
             return AZStd::move(patch);
         }
 
-        PrefabOperationResult PrefabPublicHandler::InstantiatePrefab(
+        InstantiatePrefabResult PrefabPublicHandler::InstantiatePrefab(
             AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position)
         {
             auto prefabEditorEntityOwnershipInterface = AZ::Interface<PrefabEditorEntityOwnershipInterface>::Get();
@@ -347,6 +364,7 @@ namespace AzToolsFramework
                     relativePath.Native().c_str(), instanceToParentUnder->get().GetTemplateSourcePath().Native().c_str()));
             }
 
+            AZ::EntityId containerEntityId;
             {
                 // Initialize Undo Batch object
                 ScopedUndoBatch undoBatch("Instantiate Prefab");
@@ -367,7 +385,7 @@ namespace AzToolsFramework
                     instanceToParentUnder->get(), "Update prefab instance", instanceToParentUnderDomBeforeCreate, undoBatch.GetUndoBatch());
 
                 // Create Link with correct container patches
-                AZ::EntityId containerEntityId = instanceToCreate->get().GetContainerEntityId();
+                containerEntityId = instanceToCreate->get().GetContainerEntityId();
                 AZ::Entity* containerEntity = GetEntityById(containerEntityId);
                 AZ_Assert(containerEntity, "Invalid container entity detected in InstantiatePrefab.");
 
@@ -394,7 +412,7 @@ namespace AzToolsFramework
                     &AzToolsFramework::ToolsApplicationRequestBus::Events::ClearDirtyEntities);
             }
 
-            return AZ::Success();
+            return AZ::Success(containerEntityId);
         }
 
         PrefabOperationResult PrefabPublicHandler::FindCommonRootOwningInstance(
@@ -1727,6 +1745,7 @@ namespace AzToolsFramework
 
                 AliasPath absoluteInstancePath = commonOwningInstance.GetAbsoluteInstanceAliasPath();
                 absoluteInstancePath.Append(newInstanceAlias);
+                absoluteInstancePath.Append(PrefabDomUtils::ContainerEntityName);
 
                 AZ::EntityId newEntityId = InstanceEntityIdMapper::GenerateEntityIdForAliasPath(absoluteInstancePath);
                 duplicatedEntityIds.push_back(newEntityId);

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicHandler.h

@@ -42,8 +42,11 @@ namespace AzToolsFramework
             void UnregisterPrefabPublicHandlerInterface();
 
             // PrefabPublicInterface...
-            PrefabOperationResult CreatePrefab(const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView absolutePath) override;
-            PrefabOperationResult InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) override;
+            PrefabOperationResult CreatePrefabInDisk(
+                const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath) override;
+            PrefabOperationResult CreatePrefabInMemory(
+                const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath) override;
+            InstantiatePrefabResult InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) override;
             PrefabOperationResult SavePrefab(AZ::IO::Path filePath) override;
             PrefabEntityResult CreateEntity(AZ::EntityId parentId, const AZ::Vector3& position) override;
             

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicInterface.h

@@ -25,6 +25,7 @@ namespace AzToolsFramework
     namespace Prefab
     {
         typedef AZ::Outcome<void, AZStd::string> PrefabOperationResult;
+        typedef AZ::Outcome<AZ::EntityId, AZStd::string> InstantiatePrefabResult;
         typedef AZ::Outcome<bool, AZStd::string> PrefabRequestResult;
         typedef AZ::Outcome<AZ::EntityId, AZStd::string> PrefabEntityResult;
 
@@ -39,22 +40,34 @@ namespace AzToolsFramework
             AZ_RTTI(PrefabPublicInterface, "{931AAE9D-C775-4818-9070-A2DA69489CBE}");
 
             /**
-             * Create a prefab out of the entities provided, at the path provided.
+             * Create a prefab out of the entities provided, at the path provided, and save it in disk immediately.
              * Automatically detects descendants of entities, and discerns between entities and child instances.
              * @param entityIds The entities that should form the new prefab (along with their descendants).
              * @param filePath The absolute path for the new prefab file.
              * @return An outcome object; on failure, it comes with an error message detailing the cause of the error.
              */
-            virtual PrefabOperationResult CreatePrefab(const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView absolutePath) = 0;
+            virtual PrefabOperationResult CreatePrefabInDisk(
+                const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath) = 0;
+
+            /**
+             * Create a prefab out of the entities provided, at the path provided, and keep it in memory.
+             * Automatically detects descendants of entities, and discerns between entities and child instances.
+             * @param entityIds The entities that should form the new prefab (along with their descendants).
+             * @param filePath The absolute path for the new prefab file.
+             * @return An outcome object; on failure, it comes with an error message detailing the cause of the error.
+             */
+            virtual PrefabOperationResult CreatePrefabInMemory(
+                const AZStd::vector<AZ::EntityId>& entityIds, AZ::IO::PathView filePath) = 0;
 
             /**
              * Instantiate a prefab from a prefab file.
              * @param filePath The path to the prefab file to instantiate.
              * @param parent The entity the prefab should be a child of in the transform hierarchy.
              * @param position The position in world space the prefab should be instantiated in.
-             * @return An outcome object; on failure, it comes with an error message detailing the cause of the error.
+             * @return An outcome object with an entityId of the new prefab's container entity;
+             *  on failure, it comes with an error message detailing the cause of the error.
              */
-            virtual PrefabOperationResult InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) = 0;
+            virtual InstantiatePrefabResult InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) = 0;
 
             /**
              * Saves changes to prefab to disk.

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicRequestBus.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/EntityId.h>
+#include <AzCore/EBus/EBus.h>
+#include <AzCore/Math/Vector3.h>
+#include <AzCore/std/containers/vector.h>
+#include <AzCore/std/string/string_view.h>
+
+namespace AzToolsFramework
+{
+    namespace Prefab
+    {
+        /**
+        * The primary purpose of this bus is to facilitate writing automated tests for prefabs.
+        * It calls PrefabPublicInterface internally to talk to the prefab system.
+        * If you would like to integrate prefabs into your system, please call PrefabPublicInterface
+        * directly for better performance.
+        */
+        class PrefabPublicRequests
+            : public AZ::EBusTraits
+        {
+        public:
+            using Bus = AZ::EBus<PrefabPublicRequests>;
+
+            //////////////////////////////////////////////////////////////////////////
+            // EBusTraits overrides
+            static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Single;
+            //////////////////////////////////////////////////////////////////////////
+
+            virtual ~PrefabPublicRequests() = default;
+
+            /**
+             * Create a prefab out of the entities provided, at the path provided, and keep it in memory.
+             * Automatically detects descendants of entities, and discerns between entities and child instances.
+             */
+            virtual bool CreatePrefabInMemory(
+                const AZStd::vector<AZ::EntityId>& entityIds, AZStd::string_view filePath) = 0;
+
+            /**
+             * Instantiate a prefab from a prefab file.
+             */
+            virtual AZ::EntityId InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) = 0;
+        };
+
+        using PrefabPublicRequestBus = AZ::EBus<PrefabPublicRequests>;
+
+    } // namespace Prefab
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicRequestHandler.cpp

@@ -0,0 +1,79 @@
+/*
+ * 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/Prefab/PrefabPublicRequestHandler.h>
+
+#include <AzToolsFramework/Prefab/PrefabPublicInterface.h>
+
+namespace AzToolsFramework
+{
+    namespace Prefab
+    {
+        void PrefabPublicRequestHandler::Reflect(AZ::ReflectContext* context)
+        {
+            AZ::BehaviorContext* behaviorContext = azrtti_cast<AZ::BehaviorContext*>(context);
+            if (behaviorContext)
+            {
+                behaviorContext->EBus<PrefabPublicRequestBus>("PrefabPublicRequestBus")
+                    ->Attribute(AZ::Script::Attributes::Scope, AZ::Script::Attributes::ScopeFlags::Automation)
+                    ->Attribute(AZ::Script::Attributes::Category, "Prefab")
+                    ->Attribute(AZ::Script::Attributes::Module, "prefab")
+                    ->Event("CreatePrefabInMemory", &PrefabPublicRequests::CreatePrefabInMemory)
+                    ->Event("InstantiatePrefab", &PrefabPublicRequests::InstantiatePrefab)
+                    ;
+            }
+        }
+
+        void PrefabPublicRequestHandler::Connect()
+        {
+            m_prefabPublicInterface = AZ::Interface<Prefab::PrefabPublicInterface>::Get();
+            AZ_Assert(m_prefabPublicInterface, "PrefabPublicRequestHandler - Could not retrieve instance of PrefabPublicInterface");
+
+            PrefabPublicRequestBus::Handler::BusConnect();
+        }
+
+        void PrefabPublicRequestHandler::Disconnect()
+        {
+            PrefabPublicRequestBus::Handler::BusDisconnect();
+
+            m_prefabPublicInterface = nullptr;
+        }
+
+        bool PrefabPublicRequestHandler::CreatePrefabInMemory(const AZStd::vector<AZ::EntityId>& entityIds, AZStd::string_view filePath)
+        {
+            auto createPrefabOutcome = m_prefabPublicInterface->CreatePrefabInMemory(entityIds, filePath);
+            if (!createPrefabOutcome.IsSuccess())
+            {
+                AZ_Error("CreatePrefabInMemory", false,
+                    "Failed to create Prefab on file path '%.*s'. Error message: %s.",
+                    AZ_STRING_ARG(filePath),
+                    createPrefabOutcome.GetError().c_str());
+
+                return false;
+            }
+
+            return true;
+        }
+
+        AZ::EntityId PrefabPublicRequestHandler::InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position)
+        {
+            auto instantiatePrefabOutcome = m_prefabPublicInterface->InstantiatePrefab(filePath, parent, position);
+            if (!instantiatePrefabOutcome.IsSuccess())
+            {
+                AZ_Error("InstantiatePrefab", false,
+                    "Failed to instantiate Prefab on file path '%.*s'. Error message: %s.",
+                    AZ_STRING_ARG(filePath),
+                    instantiatePrefabOutcome.GetError().c_str());
+
+                return AZ::EntityId();
+            }
+
+            return instantiatePrefabOutcome.GetValue();
+        }
+    } // namespace Prefab
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabPublicRequestHandler.h

@@ -0,0 +1,41 @@
+/*
+ * 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/Memory/SystemAllocator.h>
+#include <AzCore/RTTI/RTTI.h>
+
+#include <AzToolsFramework/Prefab/PrefabPublicRequestBus.h>
+
+namespace AzToolsFramework
+{
+    namespace Prefab
+    {
+        class PrefabPublicInterface;
+
+        class PrefabPublicRequestHandler final
+            : public PrefabPublicRequestBus::Handler
+        {
+        public:
+            AZ_CLASS_ALLOCATOR(PrefabPublicRequestHandler, AZ::SystemAllocator, 0);
+            AZ_RTTI(PrefabPublicRequestHandler, "{83FBDDF9-10BE-4373-B1DC-44B47EE4805C}");
+
+            static void Reflect(AZ::ReflectContext* context);
+
+            void Connect();
+            void Disconnect();
+
+            bool CreatePrefabInMemory(const AZStd::vector<AZ::EntityId>& entityIds, AZStd::string_view filePath) override;
+            AZ::EntityId InstantiatePrefab(AZStd::string_view filePath, AZ::EntityId parent, const AZ::Vector3& position) override;
+
+        private:
+            PrefabPublicInterface* m_prefabPublicInterface = nullptr;
+        };
+    } // namespace Prefab
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabSystemComponent.cpp

@@ -35,12 +35,14 @@ namespace AzToolsFramework
             m_instanceUpdateExecutor.RegisterInstanceUpdateExecutorInterface();
             m_instanceToTemplatePropagator.RegisterInstanceToTemplateInterface();
             m_prefabPublicHandler.RegisterPrefabPublicHandlerInterface();
+            m_prefabPublicRequestHandler.Connect();
             AZ::SystemTickBus::Handler::BusConnect();
         }
 
         void PrefabSystemComponent::Deactivate()
         {
             AZ::SystemTickBus::Handler::BusDisconnect();
+            m_prefabPublicRequestHandler.Disconnect();
             m_prefabPublicHandler.UnregisterPrefabPublicHandlerInterface();
             m_instanceToTemplatePropagator.UnregisterInstanceToTemplateInterface();
             m_instanceUpdateExecutor.UnregisterInstanceUpdateExecutorInterface();
@@ -54,6 +56,7 @@ namespace AzToolsFramework
             AzToolsFramework::Prefab::PrefabConversionUtils::PrefabConversionPipeline::Reflect(context);
             AzToolsFramework::Prefab::PrefabConversionUtils::PrefabCatchmentProcessor::Reflect(context);
             AzToolsFramework::Prefab::PrefabConversionUtils::EditorInfoRemover::Reflect(context);
+            PrefabPublicRequestHandler::Reflect(context);
 
             AZ::SerializeContext* serialize = azrtti_cast<AZ::SerializeContext*>(context);
             if (serialize)
@@ -62,7 +65,6 @@ namespace AzToolsFramework
             }
 
             AZ::JsonRegistrationContext* jsonRegistration = azrtti_cast<AZ::JsonRegistrationContext*>(context);
-
             if (jsonRegistration)
             {
                 jsonRegistration->Serializer<JsonInstanceSerializer>()->HandlesType<Instance>();

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabSystemComponent.h

@@ -24,6 +24,7 @@
 #include <AzToolsFramework/Prefab/PrefabIdTypes.h>
 #include <AzToolsFramework/Prefab/PrefabLoader.h>
 #include <AzToolsFramework/Prefab/PrefabPublicHandler.h>
+#include <AzToolsFramework/Prefab/PrefabPublicRequestHandler.h>
 #include <AzToolsFramework/Prefab/PrefabSystemComponentInterface.h>
 #include <AzToolsFramework/Prefab/Template/Template.h>
 
@@ -369,6 +370,9 @@ namespace AzToolsFramework
 
             // Used for updating Templates when Instances are modified
             InstanceToTemplatePropagator m_instanceToTemplatePropagator;
+
+            // Handler of the public Prefab requests
+            PrefabPublicRequestHandler m_prefabPublicRequestHandler;
         };
     } // namespace Prefab
 } // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabUndo.cpp

@@ -266,8 +266,8 @@ namespace AzToolsFramework
 
             AZ_Error(
                 "Prefab",
-                result.GetOutcome() == AZ::JsonSerializationResult::Outcomes::PartialSkip ||
-                    result.GetOutcome() == AZ::JsonSerializationResult::Outcomes::Success,
+                (result.GetOutcome() != AZ::JsonSerializationResult::Outcomes::Skipped) &&
+                (result.GetOutcome() != AZ::JsonSerializationResult::Outcomes::PartialSkip),
                 "Some of the patches are not successfully applied.");
 
             //remove the link id placed into the instance

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/Spawnable/EditorInfoRemover.cpp

@@ -513,7 +513,7 @@ exportComponent, prefabProcessorContext);
         // convert Prefab DOM into Prefab Instance.
         AZStd::unique_ptr<Instance> instance(aznew Instance());
         if (!Prefab::PrefabDomUtils::LoadInstanceFromPrefabDom(*instance, prefab,
-            Prefab::PrefabDomUtils::LoadInstanceFlags::AssignRandomEntityId))
+            Prefab::PrefabDomUtils::LoadFlags::AssignRandomEntityId))
         {
             PrefabDomValueReference sourceReference = PrefabDomUtils::FindPrefabDomValue(prefab, PrefabDomUtils::SourceName);
 

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/Spawnable/SpawnableUtils.cpp

@@ -30,7 +30,7 @@ namespace AzToolsFramework::Prefab::SpawnableUtils
     {
         Instance instance;
         if (Prefab::PrefabDomUtils::LoadInstanceFromPrefabDom(instance, prefabDom, referencedAssets,
-            Prefab::PrefabDomUtils::LoadInstanceFlags::AssignRandomEntityId)) // Always assign random entity ids because the spawnable is
+            Prefab::PrefabDomUtils::LoadFlags::AssignRandomEntityId)) // Always assign random entity ids because the spawnable is
                                                                               // going to be used to create clones of the entities.
         {
             AzFramework::Spawnable::EntityList& entities = spawnable.GetEntities();

Code/Framework/AzToolsFramework/AzToolsFramework/PythonTerminal/ScriptHelpDialog.cpp

@@ -6,7 +6,6 @@
  *
  */
 
-
 // Description : For listing available script commands with their descriptions
 
 #include "ScriptHelpDialog.h"
@@ -23,6 +22,7 @@
 
 // AzToolsFramework
 #include <AzToolsFramework/API/EditorPythonConsoleBus.h>    // for EditorPythonConsoleInterface
+#include <AzToolsFramework/API/EditorWindowRequestBus.h>
 
 AZ_PUSH_DISABLE_DLL_EXPORT_MEMBER_WARNING
 #include <AzToolsFramework/PythonTerminal/ui_ScriptHelpDialog.h>
@@ -313,6 +313,45 @@ namespace AzToolsFramework
         connect(ui->tableView, &ScriptTableView::doubleClicked, this, &CScriptHelpDialog::OnDoubleClick);
     }
 
+    CScriptHelpDialog* CScriptHelpDialog::GetInstance()
+    {
+        static CScriptHelpDialog* pInstance = nullptr;
+        if (!pInstance)
+        {
+            QMainWindow* mainWindow = GetMainWindowOfCurrentApplication();
+            if (!mainWindow)
+            {
+                AZ_Assert(false, "Failed to find MainWindow.");
+                return nullptr;
+            }
+
+            QWidget* parentWidget = mainWindow->window()
+                ? mainWindow->window()
+                : mainWindow; // MainWindow might have a WindowDecorationWrapper parent. Makes a difference on macOS.
+            pInstance = new CScriptHelpDialog(parentWidget);
+        }
+        return pInstance;
+    }
+
+    QMainWindow* CScriptHelpDialog::GetMainWindowOfCurrentApplication()
+    {
+        QWidget* mainWindowWidget = nullptr;
+        EditorWindowRequestBus::BroadcastResult(mainWindowWidget, &EditorWindowRequests::GetAppMainWindow);
+        if (QMainWindow* mainWindow = qobject_cast<QMainWindow*>(mainWindowWidget))
+        {
+            return mainWindow;
+        }
+
+        for (QWidget* topLevelWidget : qApp->topLevelWidgets())
+        {
+            if (QMainWindow* mainWindow = qobject_cast<QMainWindow*>(topLevelWidget))
+            {
+                return mainWindow;
+            }
+        }
+        return nullptr;
+    }
+
     void CScriptHelpDialog::OnDoubleClick(const QModelIndex& index)
     {
         if (!index.isValid())

Code/Framework/AzToolsFramework/AzToolsFramework/PythonTerminal/ScriptHelpDialog.h

@@ -132,43 +132,13 @@ namespace AzToolsFramework
     {
         Q_OBJECT
     public:
-        static CScriptHelpDialog* GetInstance()
-        {
-            static CScriptHelpDialog* pInstance = nullptr;
-            if (!pInstance)
-            {
-                QMainWindow* mainWindow = GetMainWindowOfCurrentApplication();
-                if (!mainWindow)
-                {
-                    AZ_Assert(false, "Failed to find MainWindow.");
-                    return nullptr;
-                }
-
-                QWidget* parentWidget = mainWindow->window() ? mainWindow->window() : mainWindow; // MainWindow might have a WindowDecorationWrapper parent. Makes a difference on macOS.
-                pInstance = new CScriptHelpDialog(parentWidget);
-            }
-            return pInstance;
-        }
-
+        static CScriptHelpDialog* GetInstance();
     private Q_SLOTS:
         void OnDoubleClick(const QModelIndex&);
 
     private:
-        static QMainWindow* GetMainWindowOfCurrentApplication()
-        {
-            QMainWindow* mainWindow = nullptr;
-            for (QWidget* w : qApp->topLevelWidgets())
-            {
-                mainWindow = qobject_cast<QMainWindow*>(w);
-                if (mainWindow)
-                {
-                    return mainWindow;
-                }
-            }
-            return nullptr;
-        }
-
         explicit CScriptHelpDialog(QWidget* parent = nullptr);
+        static QMainWindow* GetMainWindowOfCurrentApplication();
         QScopedPointer<Ui::ScriptDialog> ui;
     };
 } // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/UI/Outliner/EntityOutlinerTreeView.cpp

@@ -27,7 +27,7 @@
 namespace AzToolsFramework
 {
     EntityOutlinerTreeView::EntityOutlinerTreeView(QWidget* pParent)
-        : QTreeView(pParent)
+        : AzQtComponents::StyledTreeView(pParent)
         , m_queuedMouseEvent(nullptr)
         , m_draggingUnselectedItem(false)
     {
@@ -144,16 +144,12 @@ namespace AzToolsFramework
 
             if (!selectionModel()->isSelected(index))
             {
-                startCustomDrag({ index }, supportedActions);
+                StartCustomDrag({ index }, supportedActions);
                 return;
             }
         }
 
-        if (!selectionModel()->selectedIndexes().empty())
-        {
-            startCustomDrag(selectionModel()->selectedIndexes(), supportedActions);
-            return;
-        }
+        StyledTreeView::startDrag(supportedActions);
     }
 
     void EntityOutlinerTreeView::dragMoveEvent(QDragMoveEvent* event)
@@ -243,14 +239,14 @@ namespace AzToolsFramework
         QTreeView::mousePressEvent(&mousePressedEvent);
     }
 
-    void EntityOutlinerTreeView::startCustomDrag(const QModelIndexList& indexList, Qt::DropActions supportedActions)
+    void EntityOutlinerTreeView::StartCustomDrag(const QModelIndexList& indexList, Qt::DropActions supportedActions)
     {
         m_draggingUnselectedItem = true;
 
         //sort by container entity depth and order in hierarchy for proper drag image and drop order
         QModelIndexList indexListSorted = indexList;
         AZStd::unordered_map<AZ::EntityId, AZStd::list<AZ::u64>> locations;
-        for (auto index : indexListSorted)
+        for (const auto& index : indexListSorted)
         {
             AZ::EntityId entityId(index.data(EntityOutlinerListModel::EntityIdRole).value<AZ::u64>());
             AzToolsFramework::GetEntityLocationInHierarchy(entityId, locations[entityId]);
@@ -263,76 +259,8 @@ namespace AzToolsFramework
             return AZStd::lexicographical_compare(locationsE1.begin(), locationsE1.end(), locationsE2.begin(), locationsE2.end());
         });
 
-        //get the data for the unselected item(s)
-        QMimeData* mimeData = model()->mimeData(indexListSorted);
-        if (mimeData)
-        {
-            //initiate drag/drop for the item
-            QDrag* drag = new QDrag(this);
-            drag->setPixmap(QPixmap::fromImage(createDragImage(indexListSorted)));
-            drag->setMimeData(mimeData);
-            Qt::DropAction defDropAction = Qt::IgnoreAction;
-            if (defaultDropAction() != Qt::IgnoreAction && (supportedActions & defaultDropAction()))
-            {
-                defDropAction = defaultDropAction();
-            }
-            else if (supportedActions & Qt::CopyAction && dragDropMode() != QAbstractItemView::InternalMove)
-            {
-                defDropAction = Qt::CopyAction;
-            }
-            drag->exec(supportedActions, defDropAction);
-        }
+        StyledTreeView::StartCustomDrag(indexListSorted, supportedActions);
     }
-
-    QImage EntityOutlinerTreeView::createDragImage(const QModelIndexList& indexList)
-    {
-        //generate a drag image of the item icon and text, normally done internally, and inaccessible 
-        QRect rect(0, 0, 0, 0);
-        for (auto index : indexList)
-        {
-            if (index.column() != 0)
-            {
-                continue;
-            }
-            QRect itemRect = visualRect(index);
-            rect.setHeight(rect.height() + itemRect.height());
-            rect.setWidth(AZStd::GetMax(rect.width(), itemRect.width()));
-        }
-
-        QImage dragImage(rect.size(), QImage::Format_ARGB32_Premultiplied);
-
-        QPainter dragPainter(&dragImage);
-        dragPainter.setCompositionMode(QPainter::CompositionMode_Source);
-        dragPainter.fillRect(dragImage.rect(), Qt::transparent);
-        dragPainter.setCompositionMode(QPainter::CompositionMode_SourceOver);
-        dragPainter.setOpacity(0.35f);
-        dragPainter.fillRect(rect, QColor("#222222"));
-        dragPainter.setOpacity(1.0f);
-
-        int imageY = 0;
-        for (auto index : indexList)
-        {
-            if (index.column() != 0)
-            {
-                continue;
-            }
-
-            QRect itemRect = visualRect(index);
-            dragPainter.drawPixmap(QPoint(0, imageY),
-                model()->data(index, Qt::DecorationRole).value<QIcon>().pixmap(QSize(16, 16)));
-            dragPainter.setPen(
-                model()->data(index, Qt::ForegroundRole).value<QBrush>().color());
-            dragPainter.setFont(
-                font());
-            dragPainter.drawText(QRect(20, imageY, rect.width() - 20, rect.height()),
-                model()->data(index, Qt::DisplayRole).value<QString>());
-            imageY += itemRect.height();
-        }
-
-        dragPainter.end();
-        return dragImage;
-    }
-
 }
 
 #include <UI/Outliner/moc_EntityOutlinerTreeView.cpp>

Code/Framework/AzToolsFramework/AzToolsFramework/UI/Outliner/EntityOutlinerTreeView.hxx

@@ -14,7 +14,8 @@
 
 #include <QBasicTimer>
 #include <QEvent>
-#include <QTreeView>
+
+#include <AzQtComponents/Components/Widgets/TreeView.h>
 #endif
 
 #pragma once
@@ -33,7 +34,7 @@ namespace AzToolsFramework
     //! allow for dragging and dropping of entities from the outliner into the property editor
     //! of other entities. If the selection updates instantly, this would never be possible.
     class EntityOutlinerTreeView
-        : public QTreeView
+        : public AzQtComponents::StyledTreeView
     {
         Q_OBJECT;
     public:
@@ -68,9 +69,7 @@ namespace AzToolsFramework
 
         void processQueuedMousePressedEvent(QMouseEvent* event);
 
-        void startCustomDrag(const QModelIndexList& indexList, Qt::DropActions supportedActions);
-
-        QImage createDragImage(const QModelIndexList& indexList);
+        void StartCustomDrag(const QModelIndexList& indexList, Qt::DropActions supportedActions) override;
 
         void PaintBranchBackground(QPainter* painter, const QRect& rect, const QModelIndex& index) const;
         

Code/Framework/AzToolsFramework/AzToolsFramework/UI/Prefab/PrefabIntegrationManager.cpp

@@ -256,11 +256,11 @@ namespace AzToolsFramework
 
         void PrefabIntegrationManager::HandleSourceFileType(AZStd::string_view sourceFilePath, AZ::EntityId parentId, AZ::Vector3 position) const
         {
-            auto createPrefabOutcome = s_prefabPublicInterface->InstantiatePrefab(sourceFilePath, parentId, position);
+            auto instantiatePrefabOutcome = s_prefabPublicInterface->InstantiatePrefab(sourceFilePath, parentId, position);
 
-            if (!createPrefabOutcome.IsSuccess())
+            if (!instantiatePrefabOutcome.IsSuccess())
             {
-                WarnUserOfError("Prefab Instantiation Error", createPrefabOutcome.GetError());
+                WarnUserOfError("Prefab Instantiation Error", instantiatePrefabOutcome.GetError());
             }
         }
 
@@ -348,7 +348,7 @@ namespace AzToolsFramework
                 }
             }
 
-            auto createPrefabOutcome = s_prefabPublicInterface->CreatePrefab(selectedEntities, prefabFilePath.data());
+            auto createPrefabOutcome = s_prefabPublicInterface->CreatePrefabInDisk(selectedEntities, prefabFilePath.data());
 
             if (!createPrefabOutcome.IsSuccess())
             {

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/EntityPropertyEditor.hxx

@@ -19,6 +19,7 @@
 #include <AzCore/Component/Component.h>
 #include <AzCore/Component/ComponentBus.h>
 #include <AzCore/Component/EntityBus.h>
+#include <AzCore/Component/TickBus.h>
 #include <AzCore/Asset/AssetCommon.h>
 #include <AzToolsFramework/UI/PropertyEditor/PropertyEditorAPI.h>
 #include <AzToolsFramework/Undo/UndoSystem.h>
@@ -110,6 +111,7 @@ namespace AzToolsFramework
         , public EditorInspectorComponentNotificationBus::MultiHandler
         , private AzToolsFramework::ComponentModeFramework::EditorComponentModeNotificationBus::Handler
         , public AZ::EntitySystemBus::Handler
+        , public AZ::TickBus::Handler
         , private EditorWindowUIRequestBus::Handler
     {
         Q_OBJECT;
@@ -117,6 +119,23 @@ namespace AzToolsFramework
 
         AZ_CLASS_ALLOCATOR(EntityPropertyEditor, AZ::SystemAllocator, 0)
 
+        enum class ReorderState
+        {
+            Inactive, // No row widget reordering operation is in progress.
+            DraggingComponent, // User is dragging a component editor.
+            DraggingRowWidget, // User is dragging a row widget around.
+            UsingMenu, // User has the context menu open and may hover over a move up/down operation.
+            MenuOperationInProgress, // User has selected a move/up down menu item.
+            WaitForRedraw, // Wait for rebuild of RPE.
+            HighlightMovedRow // User has moved a row, highlight the new position.
+        };
+
+        enum class DropArea
+        {
+            Above,
+            Below
+        };
+
         EntityPropertyEditor(QWidget* pParent = NULL, Qt::WindowFlags flags = Qt::WindowFlags(), bool isLevelEntityEditor = false);
         virtual ~EntityPropertyEditor();
 
@@ -151,6 +170,16 @@ namespace AzToolsFramework
         bool IsLockedToSpecificEntities() const { return !m_overrideSelectedEntityIds.empty(); }
 
         static bool AreComponentsCopyable(const AZ::Entity::ComponentArrayType& components, const ComponentFilter& filter);
+
+        ReorderState GetReorderState() const;
+        ComponentEditor* GetEditorForCurrentReorderRowWidget() const;
+        PropertyRowWidget* GetReorderRowWidget() const;
+        PropertyRowWidget* GetReorderDropTarget() const;
+        DropArea GetReorderDropArea() const;
+        QPixmap GetReorderRowWidgetImage() const;
+        float GetMoveIndicatorAlpha() const;
+        PropertyRowWidget* GetRowToHighlight();
+
     Q_SIGNALS:
         void SelectedEntityNameChanged(const AZ::EntityId& entityId, const AZStd::string& name);
 
@@ -211,6 +240,9 @@ namespace AzToolsFramework
         void GetSelectedEntities(EntityIdList& selectedEntityIds) override;
         void SetNewComponentId(AZ::ComponentId componentId) override;
 
+        // TickBus
+        void OnTick(float deltaTime, AZ::ScriptTimePoint time) override;
+
         // EditorWindowRequestBus overrides
         void SetEditorUiEnabled(bool enable) override;
 
@@ -253,6 +285,10 @@ namespace AzToolsFramework
         void ContextMenuActionPullFieldData(AZ::Component* parentComponent, InstanceDataNode* fieldNode);
         void ContextMenuActionSetDataFlag(InstanceDataNode* node, AZ::DataPatch::Flag flag, bool additive);
 
+        void GenerateRowWidgetIndexMapToChildIndex(PropertyRowWidget* parent, int destIndex);
+        void ContextMenuActionMoveItemUp(ComponentEditor* componentEditor, PropertyRowWidget* rowWidget);
+        void ContextMenuActionMoveItemDown(ComponentEditor* componentEditor, PropertyRowWidget* rowWidget);
+
         /// Given an InstanceDataNode, calculate a DataPatch address relative to the entity.
         /// @return true if successful.
         bool GetEntityDataPatchAddress(const InstanceDataNode* componentFieldNode, AZ::DataPatch::AddressType& dataPatchAddressOut, AZ::EntityId* entityIdOut = nullptr) const;
@@ -341,8 +377,6 @@ namespace AzToolsFramework
         QAction* m_actionToMoveComponentsBottom = nullptr;
         QAction* m_resetToSliceAction = nullptr;
 
-        bool m_isShowingContextMenu = false;
-
         void CreateActions();
         void UpdateActions();
 
@@ -390,6 +424,10 @@ namespace AzToolsFramework
         void ResetToSlice();
 
         bool DoesOwnFocus() const;
+        AZ::u32 GetHeightOfRowAndVisibleChildren(const PropertyRowWidget* row) const;
+        QRect GetWidgetAndVisibleChildrenGlobalRect(const PropertyRowWidget* widget) const;
+        PropertyRowWidget* GetRowWidgetAtSameLevelAfter(PropertyRowWidget* widget) const;
+        PropertyRowWidget* GetRowWidgetAtSameLevelBefore(PropertyRowWidget* widget) const;
         QRect GetWidgetGlobalRect(const QWidget* widget) const;
         bool DoesIntersectWidget(const QRect& globalRect, const QWidget* widget) const;
         bool DoesIntersectSelectedComponentEditor(const QRect& globalRect) const;
@@ -445,6 +483,8 @@ namespace AzToolsFramework
         bool HandleSelectionEvents(QObject* object, QEvent* event);
         bool m_selectionEventAccepted;
 
+        bool HandleMenuEvent(QObject* object, QEvent* event);
+
         // drag and drop events
         QRect GetInflatedRectFromPoint(const QPoint& point, int radius) const;
         bool GetComponentsAtDropEventPosition(QDropEvent* event, AZ::Entity::ComponentArrayType& targetComponents);
@@ -458,8 +498,12 @@ namespace AzToolsFramework
 
         ComponentEditor* GetReorderDropTarget(const QRect& globalRect) const;
         bool ResetDrag(QMouseEvent* event);
+        bool FindAllowedRowWidgetReorderDropTarget(const QPoint& globalPos);
+        bool UpdateRowWidgetDrag(const QPoint& localPos, Qt::MouseButtons mouseButtons, const QMimeData* mimeData);
+        PropertyRowWidget* FindPropertyRowWidgetAt(QPoint globalPos);
         bool UpdateDrag(const QPoint& localPos, Qt::MouseButtons mouseButtons, const QMimeData* mimeData);
         bool StartDrag(QMouseEvent* event);
+        void EndRowWidgetReorder();
         bool HandleDrop(QDropEvent* event);
         bool HandleDropForComponentTypes(QDropEvent* event);
         bool HandleDropForComponentAssets(QDropEvent* event);
@@ -468,6 +512,8 @@ namespace AzToolsFramework
         bool CanDropForComponentTypes(const QMimeData* mimeData) const;
         bool CanDropForComponentAssets(const QMimeData* mimeData) const;
         bool CanDropForAssetBrowserEntries(const QMimeData* mimeData) const;
+        void SetRowWidgetHighlighted(PropertyRowWidget* rowWidget);
+
         AZStd::vector<AZ::s32> ExtractComponentEditorIndicesFromMimeData(const QMimeData* mimeData) const;
         ComponentEditorVector GetComponentEditorsFromIndices(const AZStd::vector<AZ::s32>& indices) const;
         ComponentEditor* GetComponentEditorsFromIndex(const AZ::s32 index) const;
@@ -559,6 +605,8 @@ namespace AzToolsFramework
 
         QIcon m_emptyIcon;
         QIcon m_clearIcon;
+        QIcon m_dragIcon;
+        QCursor m_dragCursor;
 
         QStandardItem* m_comboItems[StatusItems];
         EntityIdSet m_overrideSelectedEntityIds;
@@ -566,6 +614,19 @@ namespace AzToolsFramework
         Prefab::PrefabPublicInterface* m_prefabPublicInterface = nullptr;
         bool m_prefabsAreEnabled = false;
 
+        // Reordering row widgets within the RPE.
+        static constexpr float MoveFadeSeconds = 0.5f;
+
+        ReorderState m_currentReorderState = ReorderState::Inactive;
+        ComponentEditor* m_reorderRowWidgetEditor = nullptr;
+        InstanceDataNode* m_nodeToMove = nullptr;
+        PropertyRowWidget* m_reorderRowWidget = nullptr;
+        PropertyRowWidget* m_reorderDropTarget = nullptr;
+        DropArea m_reorderDropArea = DropArea::Above;
+        QPixmap m_reorderRowImage;
+        float m_moveFadeSecondsRemaining;
+        AZStd::vector<int> m_indexMapOfMovedRow;
+
         // When m_initiatingPropertyChangeNotification is set to true, it means this EntityPropertyEditor is
         // broadcasting a change to all listeners about a property change for a given entity.  This is needed
         // so that we don't update the values twice for this inspector
@@ -573,6 +634,9 @@ namespace AzToolsFramework
         void ConnectToEntityBuses(const AZ::EntityId& entityId);
         void DisconnectFromEntityBuses(const AZ::EntityId& entityId);
 
+        void BeginMoveRowWidgetFade();
+        void HighlightMovedRowWidget();
+
         //! Stores a component id to be focused on next time the UI updates.
         AZStd::optional<AZ::ComponentId> m_newComponentId;
 
@@ -594,6 +658,8 @@ namespace AzToolsFramework
 
         bool SelectedEntitiesAreFromSameSourceSliceEntity() const;
 
+        void DragStopped();
+
         AZ::Entity* GetSelectedEntityById(AZ::EntityId& entityId) const;
     };
 

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrl.cpp

@@ -7,8 +7,8 @@
  */
 
 
-#include "PropertyAudioCtrl.h"
-#include "PropertyQTConstants.h"
+#include <UI/PropertyEditor/PropertyAudioCtrl.h>
+#include <UI/PropertyEditor/PropertyQTConstants.h>
 
 #include <QtWidgets/QLabel>
 #include <QtWidgets/QLineEdit>
@@ -34,7 +34,7 @@ namespace AzToolsFramework
         : QWidget(parent)
         , m_browseEdit(nullptr)
         , m_mainLayout(nullptr)
-        , m_propertyType(AudioPropertyType::Invalid)
+        , m_propertyType(AudioPropertyType::NumTypes)
     {
         // create the gui
         m_mainLayout = new QHBoxLayout();
@@ -96,7 +96,7 @@ namespace AzToolsFramework
             return;
         }
 
-        if (type != AudioPropertyType::Invalid)
+        if (type != AudioPropertyType::NumTypes)
         {
             m_propertyType = type;
         }
@@ -136,10 +136,11 @@ namespace AzToolsFramework
 
     void AudioControlSelectorWidget::OnOpenAudioControlSelector()
     {
-        AZStd::string resourceResult;
-        AZStd::string resourceType(GetResourceSelectorNameFromType(m_propertyType));
         AZStd::string currentValue(m_controlName.toStdString().c_str());
-        EditorRequests::Bus::BroadcastResult(resourceResult, &EditorRequests::Bus::Events::SelectResource, resourceType, currentValue);
+        AZStd::string resourceResult;
+        AudioControlSelectorRequestBus::EventResult(
+            resourceResult, m_propertyType,
+            &AudioControlSelectorRequestBus::Events::SelectResource, currentValue);
         SetControlName(QString(resourceResult.c_str()));
     }
 
@@ -167,12 +168,12 @@ namespace AzToolsFramework
         {
         case AudioPropertyType::Trigger:
             return { "AudioTrigger" };
+        case AudioPropertyType::Rtpc:
+            return { "AudioRTPC" };
         case AudioPropertyType::Switch:
             return { "AudioSwitch" };
         case AudioPropertyType::SwitchState:
             return { "AudioSwitchState" };
-        case AudioPropertyType::Rtpc:
-            return { "AudioRTPC" };
         case AudioPropertyType::Environment:
             return { "AudioEnvironment" };
         case AudioPropertyType::Preload:

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrl.h

@@ -29,6 +29,27 @@ class QMimeData;
 
 namespace AzToolsFramework
 {
+    //=============================================================================
+    // Audio Control Selector Request Bus
+    // For connecting UI proper
+    //=============================================================================
+    class AudioControlSelectorRequests
+        : public AZ::EBusTraits
+    {
+    public:
+        // EBusTraits
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Single;
+        using BusIdType = AudioPropertyType;
+
+        virtual AZStd::string SelectResource(AZStd::string_view previousValue)
+        {
+            return previousValue;
+        }
+    };
+
+    using AudioControlSelectorRequestBus = AZ::EBus<AudioControlSelectorRequests>;
+
     //=============================================================================
     // Audio Control Selector Widget
     //=============================================================================

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrlTypes.h

@@ -18,15 +18,15 @@
 namespace AzToolsFramework
 {
     //=========================================================================
-    enum class AudioPropertyType
+    enum class AudioPropertyType : AZ::u32
     {
-        Invalid = 0,
-        Trigger,
+        Trigger = 0,
+        Rtpc,
         Switch,
         SwitchState,
-        Rtpc,
         Environment,
         Preload,
+        NumTypes,
     };
 
     //=========================================================================
@@ -40,7 +40,7 @@ namespace AzToolsFramework
         virtual ~CReflectedVarAudioControl() = default;
 
         AZStd::string m_controlName;
-        AudioPropertyType m_propertyType = AudioPropertyType::Invalid;
+        AudioPropertyType m_propertyType = AudioPropertyType::NumTypes;
 
         static void Reflect(AZ::ReflectContext* context)
         {

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyRowWidget.cpp

@@ -70,7 +70,7 @@ namespace AzToolsFramework
 
         m_leftAreaContainer = new QWidget(this);
         m_middleAreaContainer = new QWidget(this);
-        const int minimumControlWidth = 192;
+        const int minimumControlWidth = 142;
         m_middleAreaContainer->setMinimumWidth(minimumControlWidth);
         m_mainLayout->addWidget(m_leftAreaContainer, LabelColumnStretch, Qt::AlignLeft);
         m_mainLayout->addWidget(m_middleAreaContainer, ValueColumnStretch);
@@ -368,10 +368,15 @@ namespace AzToolsFramework
             delete m_containerAddButton;
         }
 
+        this->unsetCursor();
+
         if ((m_parentRow) && (m_parentRow->IsContainerEditable()))
         {
             if (!m_elementRemoveButton)
             {
+                QIcon icon = QIcon(QStringLiteral(":/Cursors/Grab_release.svg"));
+                this->setCursor(QCursor(icon.pixmap(16), 5, 2));
+
                 static QIcon s_iconRemove(QStringLiteral(":/stylesheet/img/UI20/delete-16.svg"));
                 m_elementRemoveButton = new QToolButton(this);
                 m_elementRemoveButton->setAutoRaise(true);
@@ -570,7 +575,12 @@ namespace AzToolsFramework
         AZ_Assert(m_selectionEnabled, "Property is not selectable");
         m_isSelected = selected;
         m_nameLabel->setProperty("selected", selected);
-    }    
+    }
+
+    bool PropertyRowWidget::GetSelected()
+    {
+        return m_isSelected;
+    }   
     
     void PropertyRowWidget::SetSelectionEnabled(bool selectionEnabled)
     {
@@ -1395,6 +1405,21 @@ namespace AzToolsFramework
         return !m_childrenRows.empty(); 
     }
 
+    AZ::u32 PropertyRowWidget::GetChildRowCount() const
+    {
+        return static_cast<AZ::u32>(m_childrenRows.size());
+    }
+
+    PropertyRowWidget* PropertyRowWidget::GetChildRowByIndex(AZ::u32 index) const
+    {
+        if (index >= m_childrenRows.size())
+        {
+            return nullptr;
+        }
+
+        return m_childrenRows[index];
+    }
+
     bool PropertyRowWidget::ShouldPreValidatePropertyChange() const
     {
         return (m_changeValidators.size() > 0);
@@ -1722,6 +1747,162 @@ namespace AzToolsFramework
 
         return m_parentRow->CanChildrenBeReordered();
     }
+
+        int PropertyRowWidget::GetIndexInParent() const
+    {
+        if (!GetParentRow())
+        {
+            return -1;
+        }
+
+        for (AZ::u32 index = 0; index < GetParentRow()->GetChildRowCount(); index++)
+        {
+            if (GetParentRow()->GetChildrenRows()[index] == this)
+            {
+                return index;
+            }
+        }
+
+        return -1;
+    }
+
+    bool PropertyRowWidget::CanMoveUp() const
+    {
+        if (!CanBeReordered())
+        {
+            return false;
+        }
+
+        return this != m_parentRow->GetChildRowByIndex(0);
+    }
+
+    bool PropertyRowWidget::CanMoveDown() const
+    {
+        if (!CanBeReordered())
+        {
+            return false;
+        }
+
+        AZ::u32 numChildrenOfParent = m_parentRow->GetChildRowCount();
+
+        return this != m_parentRow->GetChildRowByIndex(numChildrenOfParent - 1);
+    }
+
+    int PropertyRowWidget::GetContainingEditorFrameWidth()
+    {
+        QWidget* parent = parentWidget();
+
+        // Find the first ancestor that can be cast to a QFrame, this will be the RPE.
+        while (!qobject_cast<QFrame*>(parent))
+        {
+            parent = parent->parentWidget();
+        }
+
+        if (!parent)
+        {
+            return 0;
+        }
+
+        // The parent of the RPE is the size we want.
+        parent = parent->parentWidget();
+        
+        return parent->rect().width();
+    }
+
+    int PropertyRowWidget::GetHeightOfRowAndVisibleChildren()
+    {
+        int height = rect().height();
+
+        if (!GetChildRowCount() || !IsExpanded())
+        {
+            return height;
+        }
+
+        for (auto childRow : GetChildrenRows())
+        {
+            height += childRow->GetHeightOfRowAndVisibleChildren();
+        }
+
+        return height;
+    }
+
+    int PropertyRowWidget::DrawDragImageAndVisibleChildrenInto(QPainter& painter, int xpos, int ypos)
+    {
+        // Render our image into the given painter.
+        int ystart = ypos;
+
+        render(&painter, QPoint(xpos, ypos));
+
+        if (!GetChildRowCount() || !IsExpanded())
+        {
+            return rect().height();
+        }
+
+        ypos += rect().height();
+
+        // Recursively draw any children.
+        for (auto childRow : GetChildrenRows())
+        {
+            ypos += childRow->DrawDragImageAndVisibleChildrenInto(painter, xpos, ypos);
+        }
+
+        return ypos - ystart;
+    }
+
+    QPixmap PropertyRowWidget::createDragImage(
+        const QColor backgroundColor, const QColor borderColor, const float alpha, DragImageType imageType)
+    {
+        // Make the drag box as wide as the containing editor minus a gap each side for the border.
+        static constexpr int ParentEditorBorderSize = 2;
+        int width = GetContainingEditorFrameWidth() - ParentEditorBorderSize * 2;
+        int height = 0;
+
+        if (imageType == DragImageType::IncludeVisibleChildren)
+        {
+            height = GetHeightOfRowAndVisibleChildren();
+        }
+        else
+        {
+            height = rect().height();
+        }
+
+        const auto dpr = devicePixelRatioF();
+        QPixmap dragImage(width * dpr, height * dpr);
+        dragImage.setDevicePixelRatio(dpr);
+        dragImage.fill(Qt::transparent);
+
+        QRect imageRect = QRect(0, 0, width, height);
+
+        QPainter dragPainter(&dragImage);
+        dragPainter.setCompositionMode(QPainter::CompositionMode_Source);
+        dragPainter.fillRect(imageRect, Qt::transparent);
+        dragPainter.setCompositionMode(QPainter::CompositionMode_SourceOver);
+        dragPainter.setOpacity(alpha);
+        dragPainter.fillRect(imageRect, backgroundColor);
+
+        dragPainter.setOpacity(1.0f);
+
+        int marginWidth = (imageRect.width() - rect().width()) / 2 + ParentEditorBorderSize - 1;
+
+        if (imageType == DragImageType::IncludeVisibleChildren)
+        {
+            DrawDragImageAndVisibleChildrenInto(dragPainter, marginWidth, 0);
+        }
+        else
+        {
+            render(&dragPainter, QPoint(marginWidth, 0));
+        }
+
+        QPen pen;
+        pen.setColor(QColor(borderColor));
+        pen.setWidth(1);
+        dragPainter.setPen(pen);
+        dragPainter.drawRect(0, 0, imageRect.width() - 1, imageRect.height() - 1);
+
+        dragPainter.end();
+
+        return dragImage;
+    }
 }
 
 #include "UI/PropertyEditor/moc_PropertyRowWidget.cpp"

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyRowWidget.hxx

@@ -45,6 +45,13 @@ namespace AzToolsFramework
         Q_PROPERTY(bool appendDefaultLabelToName READ GetAppendDefaultLabelToName WRITE AppendDefaultLabelToName)
     public:
         AZ_CLASS_ALLOCATOR(PropertyRowWidget, AZ::SystemAllocator, 0)
+
+        enum class DragImageType
+        {
+            SingleRow,
+            IncludeVisibleChildren
+        };
+
         PropertyRowWidget(QWidget* pParent);
         virtual ~PropertyRowWidget();
 
@@ -86,6 +93,9 @@ namespace AzToolsFramework
         bool GetAppendDefaultLabelToName();
         void AppendDefaultLabelToName(bool doAppend);
 
+        AZ::u32 GetChildRowCount() const;
+        PropertyRowWidget* GetChildRowByIndex(AZ::u32 index) const;
+
         AZStd::vector<PropertyRowWidget*>& GetChildrenRows() { return m_childrenRows; }
         bool HasChildRows() const;
 
@@ -124,6 +134,7 @@ namespace AzToolsFramework
 
         void SetSelectionEnabled(bool selectionEnabled);
         void SetSelected(bool selected);
+        bool GetSelected();
         bool eventFilter(QObject *watched, QEvent *event) override;
         void paintEvent(QPaintEvent*) override;
 
@@ -152,9 +163,18 @@ namespace AzToolsFramework
         bool CanChildrenBeReordered() const;
         bool CanBeReordered() const;
 
+        int GetIndexInParent() const;
+        bool CanMoveUp() const;
+        bool CanMoveDown() const;
+
+        int GetContainingEditorFrameWidth();
+        QPixmap createDragImage(const QColor backgroundColor, const QColor borderColor, const float alpha, DragImageType imageType);
     protected:
         int CalculateLabelWidth() const;
 
+        int GetHeightOfRowAndVisibleChildren();
+        int DrawDragImageAndVisibleChildrenInto(QPainter& painter, int xpos, int ypos);
+
         bool IsHidden(InstanceDataNode* node) const;
 
         struct ChangeNotification;
@@ -216,6 +236,7 @@ namespace AzToolsFramework
         bool m_isMultiSizeContainer = false;
         bool m_isFixedSizeOrSmartPtrContainer = false;
         bool m_custom = false;
+        bool m_canChildrenBeReordered = false;
 
         bool m_isSelected = false;
         bool m_selectionEnabled = false;

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/ReflectedPropertyEditor.cpp

@@ -19,6 +19,7 @@
 #include <QtWidgets/QVBoxLayout>
 #include <QtWidgets/QScrollArea>
 #include <QtWidgets/QApplication>
+#include <QPainter>
 AZ_PUSH_DISABLE_WARNING(4251, "-Wunknown-warning-option") // 'QTextFormat::d': class 'QSharedDataPointer<QTextFormatPrivate>' needs to have dll-interface to be used by clients of class 'QTextFormat'
 #include <QtWidgets/QInputDialog>
 AZ_POP_DISABLE_WARNING
@@ -1343,7 +1344,7 @@ namespace AzToolsFramework
 
     // calculate the index/offset of the instance data node in the container
     // (useful for notifying which element in a vector was modified/removed)
-    static size_t CalculateElementIndexInContainer(
+    static int CalculateElementIndexInContainer(
         InstanceDataNode* node, void* parentInstanceNode,
         AZ::SerializeContext::IDataContainer* container, AZStd::vector<void*>& nodeInstancesOut)
     {
@@ -1358,7 +1359,7 @@ namespace AzToolsFramework
             }
         }
 
-        size_t elementIndex = 0;
+        int elementIndex = 0;
         void* elementPtr = nodeInstancesOut.empty() ? nullptr : nodeInstancesOut.front();
 
         // find the index of the element we are about to remove
@@ -1429,7 +1430,7 @@ namespace AzToolsFramework
 
                 // if the element being modified exists in a container, calculate
                 // the index to be passed through to PropertyNotify
-                const auto calculateElementIndex = [](InstanceDataNode* node) -> size_t {
+                const auto calculateElementIndex = [](InstanceDataNode* node) -> int {
                     if (InstanceDataNode* parent = node->GetParent())
                     {
                         if (AZ::SerializeContext::IDataContainer* container = parent->GetClassMetadata()->m_container)
@@ -1656,6 +1657,221 @@ namespace AzToolsFramework
             AzToolsFramework::Refresh_EntireTree);
     }
 
+    InstanceDataNode* ReflectedPropertyEditor::FindContainerNodeForNode(InstanceDataNode* node) const
+    {
+        // Locate the owning container. There may be a level of indirection due to wrappers, such as DynamicSerializableField.
+        InstanceDataNode* pContainerNode = node->GetParent();
+        if (!pContainerNode)
+        {
+            return nullptr;
+        }
+
+        while (pContainerNode && !pContainerNode->GetClassMetadata()->m_container)
+        {
+            pContainerNode = pContainerNode->GetParent();
+            node = node->GetParent();
+        }
+
+        // Check for pContainerNode again, can happen if a node is deleted during operation.
+        if (!pContainerNode)
+        {
+            return nullptr;
+        }
+
+        if (IsParentAssociativeContainer(pContainerNode) && IsPairContainer(pContainerNode))
+        {
+            // Go up one more level to the associative container, we'll remove the pair from that container
+            pContainerNode = pContainerNode->GetParent();
+            node = node->GetParent();
+        }
+
+        AZ_Assert(
+            pContainerNode, "Failed to locate parent container for element \"%s\" of type %s.",
+            node->GetElementMetadata() ? node->GetElementMetadata()->m_name : node->GetClassMetadata()->m_name,
+            node->GetClassMetadata()->m_typeId.ToString<AZStd::string>().c_str());
+
+        return pContainerNode;
+    }
+
+    InstanceDataNode* ReflectedPropertyEditor::GetNodeAtIndex(int index)
+    {
+        if (index >= m_impl->m_widgetsInDisplayOrder.size())
+        {
+            return nullptr;
+        }
+
+        return GetNodeFromWidget(m_impl->m_widgetsInDisplayOrder[index]);
+    }
+
+    QSet<PropertyRowWidget*> ReflectedPropertyEditor::GetTopLevelWidgets()
+    {
+        return m_impl->getTopLevelWidgets();
+    }
+
+    void ReflectedPropertyEditor::ChangeNodeIndex(InstanceDataNode* containerNode, InstanceDataNode* node, int fromIndex, int toIndex)
+    {
+        auto container = containerNode->GetElementMetadata()
+            ? containerNode->GetElementMetadata()->m_genericClassInfo->GetClassData()->m_container
+            : nullptr;
+
+        if (fromIndex == toIndex)
+        {
+            return;
+        }
+
+        if (!container || container->GetAssociativeContainerInterface())
+        {
+            return;
+        }
+
+        AZ::Uuid typeId = node->GetClassMetadata()->m_typeId;
+
+        if (m_impl->m_ptrNotify)
+        {
+            m_impl->m_ptrNotify->BeforePropertyModified(containerNode);
+        }
+
+        const AZ::SerializeContext::ClassElement* containerClassElement = container->GetElement(container->GetDefaultElementNameCrc());
+
+        AZ::SerializeContext* serializeContext = nullptr;
+        AZ::ComponentApplicationBus::BroadcastResult(serializeContext, &AZ::ComponentApplicationBus::Events::GetSerializeContext);
+
+        // Backup the item we're moving.
+        void* srcElement = nullptr;
+        void* destElement = nullptr;
+
+        int destIndex = -1;
+        int srcIndex = fromIndex;
+
+        srcElement = container->GetElementByIndex(containerNode->GetInstance(0), containerClassElement, srcIndex);
+
+        void* tmpBuffer = serializeContext->CloneObject(srcElement, typeId);
+
+        // Shuffle all intervening items up (or down).
+        int indexOffset = (toIndex < fromIndex) ? -1 : 1;
+
+        while (destIndex != toIndex - indexOffset)
+        {
+            destIndex = srcIndex;
+            srcIndex += indexOffset;
+
+            destElement = srcElement;
+
+            srcElement = container->GetElementByIndex(containerNode->GetInstance(0), containerClassElement, srcIndex);
+
+            serializeContext->CloneObjectInplace(destElement, srcElement, typeId);
+        }
+
+        // Now replace the final element with the one backed up previously.
+        destElement = srcElement;
+
+        serializeContext->CloneObjectInplace(destElement, tmpBuffer, typeId);
+
+        if (m_impl->m_ptrNotify)
+        {
+            m_impl->m_ptrNotify->AfterPropertyModified(containerNode);
+            m_impl->m_ptrNotify->SealUndoStack();
+        }
+
+        // Need to refresh any pinned inspectors as well to keep the container state in sync
+        QueueInvalidation(Refresh_Values);
+        AzToolsFramework::ToolsApplicationEvents::Bus::Broadcast(
+            &AzToolsFramework::ToolsApplicationEvents::InvalidatePropertyDisplay, AzToolsFramework::Refresh_Values);
+    }
+
+    void ReflectedPropertyEditor::MoveNodeToIndex(InstanceDataNode* node, int index)
+    {
+        InstanceDataNode* pContainerNode = FindContainerNodeForNode(node);
+
+        if (!pContainerNode)
+        {
+            return;
+        }
+
+        AZ::SerializeContext::IDataContainer* container = pContainerNode->GetClassMetadata()->m_container;
+
+        AZStd::vector<void*> nodeInstancesOut;
+        const int elementIndex = CalculateElementIndexInContainer(node, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+
+        ChangeNodeIndex(pContainerNode, node, elementIndex, index);
+    }
+
+    void ReflectedPropertyEditor::MoveNodeBefore(InstanceDataNode* nodeToMove, InstanceDataNode* nodeToMoveBefore)
+    {
+        InstanceDataNode* pContainerNode = FindContainerNodeForNode(nodeToMove);
+        InstanceDataNode* pContainerNodeTarget = FindContainerNodeForNode(nodeToMoveBefore);
+
+        if (nodeToMove == nodeToMoveBefore)
+        {
+            return;
+        }
+
+        // Can only move nodes within the same parent.
+        if (pContainerNode != pContainerNodeTarget)
+        {
+            return;
+        }
+
+        AZ::SerializeContext::IDataContainer* container = pContainerNode->GetClassMetadata()->m_container;
+
+        AZStd::vector<void*> nodeInstancesOut;
+        int elementIndex = CalculateElementIndexInContainer(nodeToMove, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+        nodeInstancesOut.clear();
+        int elementIndexTarget =
+            CalculateElementIndexInContainer(nodeToMoveBefore, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+
+        if (elementIndex < elementIndexTarget)
+        {
+            elementIndexTarget -= 1;
+        }
+
+        ChangeNodeIndex(pContainerNode, nodeToMove, elementIndex, elementIndexTarget);
+    }
+
+    void ReflectedPropertyEditor::MoveNodeAfter(InstanceDataNode* nodeToMove, InstanceDataNode* nodeToMoveBefore)
+    {
+        InstanceDataNode* pContainerNode = FindContainerNodeForNode(nodeToMove);
+        InstanceDataNode* pContainerNodeTarget = FindContainerNodeForNode(nodeToMoveBefore);
+
+        if (nodeToMove == nodeToMoveBefore)
+        {
+            return;
+        }
+
+        // Can only move nodes within the same parent.
+        if (pContainerNode != pContainerNodeTarget)
+        {
+            return;
+        }
+
+        AZ::SerializeContext::IDataContainer* container = pContainerNode->GetClassMetadata()->m_container;
+
+        AZStd::vector<void*> nodeInstancesOut;
+        int elementIndex = CalculateElementIndexInContainer(nodeToMove, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+        nodeInstancesOut.clear();
+        int elementIndexTarget =
+            CalculateElementIndexInContainer(nodeToMoveBefore, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+
+        if (elementIndex > elementIndexTarget)
+        {
+            elementIndexTarget += 1;
+        }
+
+        ChangeNodeIndex(pContainerNode, nodeToMove, elementIndex, elementIndexTarget);
+    }
+
+    int ReflectedPropertyEditor::GetNodeIndexInContainer(InstanceDataNode* node)
+    {
+        InstanceDataNode* pContainerNode = FindContainerNodeForNode(node);
+
+        AZ::SerializeContext::IDataContainer* container = pContainerNode->GetClassMetadata()->m_container;
+
+        AZStd::vector<void*> nodeInstancesOut;
+        int elementIndex = CalculateElementIndexInContainer(node, pContainerNode->GetInstance(0), container, nodeInstancesOut);
+
+        return elementIndex;
+    }
+
     void ReflectedPropertyEditor::OnPropertyRowRequestContainerRemoveItem(PropertyRowWidget* widget, InstanceDataNode* node)
     {
         // Locate the owning container. There may be a level of indirection due to wrappers, such as DynamicSerializableField.
@@ -1690,7 +1906,7 @@ namespace AzToolsFramework
 
         // the index of the element being removed
         AZStd::vector<void*> nodeInstancesOut;
-        const size_t elementIndex = CalculateElementIndexInContainer(
+        const int elementIndex = CalculateElementIndexInContainer(
             node, pContainerNode->GetInstance(0), container, nodeInstancesOut);
 
         // pass the context as the last parameter to actually delete the related data.

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/ReflectedPropertyEditor.hxx

@@ -155,9 +155,19 @@ namespace AzToolsFramework
         using VisibilityCallback = AZStd::function<void(InstanceDataNode* node, NodeDisplayVisibility& visibility, bool& checkChildVisibility)>;
         void SetVisibilityCallback(VisibilityCallback callback);
 
+        void MoveNodeToIndex(InstanceDataNode* node, int index);
+        void MoveNodeBefore(InstanceDataNode* nodeToMove, InstanceDataNode* nodeToMoveBefore);
+        void MoveNodeAfter(InstanceDataNode* nodeToMove, InstanceDataNode* nodeToMoveBefore);
+
+        int GetNodeIndexInContainer(InstanceDataNode* node);
+        InstanceDataNode* GetNodeAtIndex(int index);
+        QSet<PropertyRowWidget*> GetTopLevelWidgets();
     signals:
         void OnExpansionContractionDone();
     private:
+        InstanceDataNode* FindContainerNodeForNode(InstanceDataNode* node) const;
+        void ChangeNodeIndex(InstanceDataNode* containerNode, InstanceDataNode* node, int oldIndex, int newIndex);
+
         class Impl;
         std::unique_ptr<Impl> m_impl;
         

Code/Framework/AzToolsFramework/AzToolsFramework/Viewport/ViewportTypes.h

@@ -19,6 +19,7 @@
 namespace AZ
 {
     class ReflectContext;
+    class SerializeContext;
 }
 
 namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/aztoolsframework_files.cmake

@@ -657,6 +657,9 @@ set(FILES
     Prefab/PrefabPublicHandler.cpp
     Prefab/PrefabPublicInterface.h
     Prefab/PrefabPublicNotificationBus.h
+    Prefab/PrefabPublicRequestBus.h
+    Prefab/PrefabPublicRequestHandler.h
+    Prefab/PrefabPublicRequestHandler.cpp
     Prefab/PrefabUndo.h
     Prefab/PrefabUndo.cpp
     Prefab/PrefabUndoCache.cpp