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  3. UDataHierarchyViewModelBase

UDataHierarchyViewModelBase

The main controller class for the SHierarchyEditor widget.

API > API/Editor > API/Editor/DataHierarchyEditor

The main controller class for the SHierarchyEditor widget. Defines core hierarchy rules. Inherit from this and override the required virtual functions, instantiate an object, Initialize it and pass it to the SHierarchyEditor widget.

   
Name UDataHierarchyViewModelBase
Type class
Header File /Engine/Source/Editor/DataHierarchyEditor/Public/DataHierarchyViewModelBase.h
Include Path #include "DataHierarchyViewModelBase.h"

Syntax

UCLASS (MinimalAPI, Abstract, Transient)  
class UDataHierarchyViewModelBase :  
    public UObject ,  
    public FSelfRegisteringEditorUndoClient

Inheritance Hierarchy

Derived Classes

Constructors

Name Remarks Include Path Unreal Specifiers

UDataHierarchyViewModelBase()

   DataHierarchyViewModelBase.h  

Destructors

Name Remarks Include Path Unreal Specifiers

virtual ~UDataHierarchyViewModelBase()

   DataHierarchyViewModelBase.h  

Typedefs

Name Type Remarks Include Path
FOnElementAdded TBaseDelegate_OneParam< void, TSharedPtr< FHierarchyElementViewModel > AddedElement >   DataHierarchyViewModelBase.h
FOnHierarchyChanged TMulticastDelegate_NoParams< void >   DataHierarchyViewModelBase.h
FOnHierarchyElementChanged TBaseDelegate_OneParam< void, TInstancedStruct< FHierarchyElementChangedPayload > >   DataHierarchyViewModelBase.h
FOnHierarchyPropertiesChanged TMulticastDelegate_NoParams< void >   DataHierarchyViewModelBase.h
FOnNavigateToElementIdentityInHierarchyRequested TBaseDelegate_OneParam< void, FHierarchyElementIdentity Identity >   DataHierarchyViewModelBase.h
FOnNavigateToElementInHierarchyRequested TBaseDelegate_OneParam< void, TSharedPtr< FHierarchyElementViewModel > ElementViewModel >   DataHierarchyViewModelBase.h
FOnRefreshViewRequested TBaseDelegate_OneParam< void, bool bForceFullRefresh >   DataHierarchyViewModelBase.h
FOnSectionActivated TBaseDelegate_OneParam< void, TSharedPtr< FHierarchySectionViewModel > Section >   DataHierarchyViewModelBase.h

Constants

Name Type Remarks Include Path
AllSectionDisplayName FText   DataHierarchyViewModelBase.h
AllSectionHierarchyObjectName FName   DataHierarchyViewModelBase.h
AllSectionSourceObjectName FName   DataHierarchyViewModelBase.h

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
AllSection TObjectPtr< UHierarchySection > We construct a transient all section that isn't actually contained within the hierarchy. DataHierarchyViewModelBase.h
  • Transient
bIsFinalized bool   DataHierarchyViewModelBase.h
  • Transient
bIsInitialized bool   DataHierarchyViewModelBase.h
  • Transient

Functions

Public

Name Remarks Include Path Unreal Specifiers

void AddCategory ( TSharedPtr< FHierarchyElementViewModel > CategoryParent
) const

   DataHierarchyViewModelBase.h  

void AddElementUnderRoot ( TSubclassOf< UHierarchyElement > NewChildClass,
FHierarchyElementIdentity ChildIdentity
)

   DataHierarchyViewModelBase.h  
Function to implement drag drop ops. DataHierarchyViewModelBase.h  
Creates view model hierarchy elements. DataHierarchyViewModelBase.h  

void DeleteElements ( TArray< TSharedPtr< FHierarchyElementViewModel > > ViewModels
) const

 Delete all specified elements. DataHierarchyViewModelBase.h  
Special case for deleting a specific element based on its identity. DataHierarchyViewModelBase.h  

void Finalize()

 Call Finalize manually when you no longer need the HierarchyViewModel. DataHierarchyViewModelBase.h  

void ForceFullRefresh()

 Refreshes all data and widgets DataHierarchyViewModelBase.h  

void ForceFullRefreshOnTimer()

   DataHierarchyViewModelBase.h  

const UHierarchySection * GetActiveHierarchySectionData()

   DataHierarchyViewModelBase.h  

TSharedPtr< FHierarchySectionViewModel > GetActiveHierarchySectionViewModel()

   DataHierarchyViewModelBase.h  

virtual TArray< TSubclassOf< UHierarchyElement > > GetAdditionalTypesToAddInUi()

 If specified, will add a button in the Data Hierarchy Editor that allows adding the given types from a menu rather than drag & dropping them into the hierarchy. DataHierarchyViewModelBase.h  
The class used for creating categories. DataHierarchyViewModelBase.h  

TSharedRef< FUICommandList > GetCommands()

   DataHierarchyViewModelBase.h  

FName GetContextMenuName()

   DataHierarchyViewModelBase.h  

TSharedPtr< struct FHierarchySectionViewModel > GetDefaultHierarchySectionViewModel()

   DataHierarchyViewModelBase.h  
Hierarchy items reflect the already edited hierarchy. DataHierarchyViewModelBase.h  
The hierarchy root the widget is editing. DataHierarchyViewModelBase.h  

TSharedPtr< struct FHierarchyRootViewModel > GetHierarchyRootViewModel()

 Get the root view model associated with the hierarchy. DataHierarchyViewModelBase.h  

virtual TArray< TTuple< UClass *, FOnGetDetailCustomizationInstance > > GetInstanceCustomizations()

 Overriding this allows to define details panel instance customizations for specific UClasses DataHierarchyViewModelBase.h  

virtual UObject * GetOuterForSourceRoot()

 The outer for the transient source root creation can be overridden. DataHierarchyViewModelBase.h  

const UHierarchyDataRefreshContext * GetRefreshContext()

   DataHierarchyViewModelBase.h  
The class used for creating sections. DataHierarchyViewModelBase.h  

void Initialize ()

 Initialize is called automatically for you, but it is recommended to call it manually after creating the HierarchyViewModel in your own Initialize function. DataHierarchyViewModelBase.h  

bool IsFinalized()

   DataHierarchyViewModelBase.h  

bool IsHierarchySectionActive ( const UHierarchySection* Section
) const

   DataHierarchyViewModelBase.h  

bool IsInitialized()

   DataHierarchyViewModelBase.h  

bool IsValid()

   DataHierarchyViewModelBase.h  

void NavigateToElementInHierarchy ( const TSharedRef< FHierarchyElementViewModel > HierarchyElement
) const

   DataHierarchyViewModelBase.h  

void NavigateToElementInHierarchy ( const FHierarchyElementIdentity& HierarchyIdentity
) const

   DataHierarchyViewModelBase.h  

FString OnElementToStringDebug ( TSharedPtr< FHierarchyElementViewModel > ElementViewModel
) const

   DataHierarchyViewModelBase.h  

void OnGetChildren ( TSharedPtr< FHierarchyElementViewModel > Element,
TArray< TSharedPtr< FHierarchyElementViewModel > >& OutChildren
) const

   DataHierarchyViewModelBase.h  

FOnHierarchyChanged & OnHierarchyChanged()

   DataHierarchyViewModelBase.h  

FOnHierarchyElementChanged & OnHierarchyElementChanged()

 Delegates for external systems. DataHierarchyViewModelBase.h  

FOnHierarchyChanged & OnHierarchyPropertiesChanged()

   DataHierarchyViewModelBase.h  

FOnSectionActivated & OnHierarchySectionActivated()

   DataHierarchyViewModelBase.h  

FSimpleDelegate & OnInitialized()

   DataHierarchyViewModelBase.h  

FOnNavigateToElementIdentityInHierarchyRequested & OnNavigateToElementIdentityInHierarchyRequested()

   DataHierarchyViewModelBase.h  

FOnNavigateToElementInHierarchyRequested & OnNavigateToElementInHierarchyRequested()

   DataHierarchyViewModelBase.h  

FOnRefreshViewRequested & OnRefreshHierarchyView()

   DataHierarchyViewModelBase.h  

FSimpleDelegate & OnRefreshSectionsView()

   DataHierarchyViewModelBase.h  

FSimpleDelegate & OnRefreshSourceItemsRequested()

 Delegate that call functions from SHierarchyEditor. DataHierarchyViewModelBase.h  

FOnRefreshViewRequested & OnRefreshSourceView()

   DataHierarchyViewModelBase.h  

FOnRefreshViewRequested & OnRefreshViewRequested()

 FOnElementAdded& OnElementAdded() { return OnElementAddedDelegate; }. DataHierarchyViewModelBase.h  

virtual void PrepareSourceItems ( UHierarchyRoot* SourceRoot,
TSharedPtr< FHierarchyRootViewModel > SourceRootViewModel
)

 Prepares the items we want to create a hierarchy for. DataHierarchyViewModelBase.h  

void RefreshAllViews ( bool bFullRefresh
) const

   DataHierarchyViewModelBase.h  

void RefreshHierarchyView ( bool bFullRefresh
) const

   DataHierarchyViewModelBase.h  

void RefreshSectionsView()

   DataHierarchyViewModelBase.h  

void RefreshSourceView ( bool bFullRefresh
) const

   DataHierarchyViewModelBase.h  

void RequestFullRefreshNextFrame()

   DataHierarchyViewModelBase.h  

virtual bool SelectRootInsteadOfNone ()

 Attempts to select the root object when no object is selected. DataHierarchyViewModelBase.h  

void SetActiveHierarchySection ( TSharedPtr< struct FHierarchySectionViewModel >
)

 Sections. DataHierarchyViewModelBase.h  

void SetRefreshContext ( UHierarchyDataRefreshContext* InContext
)

 Set the refresh context to easily allow Hierarchy Elements representing external data to access whether the external data still exists. DataHierarchyViewModelBase.h  

virtual bool SupportsDetailsPanel()

 This needs to return true if you want the details panel to show up. DataHierarchyViewModelBase.h  

virtual bool SupportsSourcePanel()

 If false, disables source item functionality (left panel). DataHierarchyViewModelBase.h  

Protected

Name Remarks Include Path Unreal Specifiers

virtual bool MatchesContext ( const FTransactionContext& InContext,
const TArray< TPair< UObject*, FTransactionObjectEvent > >& TransactionObjectContexts
) const

   DataHierarchyViewModelBase.h  

virtual void PostRedo ( bool bSuccess
)

   DataHierarchyViewModelBase.h  

virtual void PostUndo ( bool bSuccess
)

   DataHierarchyViewModelBase.h  

virtual void SetupCommands()

 Additional commands can be specified overriding the SetupCommands function. DataHierarchyViewModelBase.h  

Static

Name Remarks Include Path Unreal Specifiers

static void GenerateDynamicContextMenu ( UToolMenu* ToolMenu
)

   DataHierarchyViewModelBase.h  

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