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  3. USelection

USelection

Manages selections of objects.

API > API/Editor > API/Editor/UnrealEd

Manages selections of objects. Used in the editor for selecting objects in the various browser windows.

   
Name USelection
Type class
Header File /Engine/Source/Editor/UnrealEd/Public/Selection.h
Include Path #include "Selection.h"

Syntax

UCLASS (Transient, MinimalAPI)  
class USelection : public UObject

Inheritance Hierarchy

Classes

Name Remarks
FOnSelectionChanged Params: UObject* NewSelection
FOnSelectionElementSelectionPtrChanged Event fired when the typed element selection set for a selection is changed

Constants

Name Type Remarks Include Path
SelectionChangedEvent FOnSelectionChanged Called when selection in editor has changed Selection.h
SelectionElementSelectionPtrChanged FOnSelectionElementSelectionPtrChanged Called when the assigned typed element selection pointer set for a selection is changed Selection.h
SelectNoneEvent FSimpleMulticastDelegate Called to deselect everything Selection.h
SelectObjectEvent FOnSelectionChanged Called when an object has been selected (generally an actor) Selection.h

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
ElementSelectionSet TObjectPtr< UTypedElementSelectionSet > Underlying element selection set (if any). Selection.h  
SelectionElementBridge TSharedPtr< ISelectionElementBridge > Bridge from UObjects to their corresponding typed elements. Selection.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void BeginBatchSelectOperation()

 Call before beginning selection operations Selection.h  

int32 CountSelections ( bool bIgnorePendingKill
)

 Returns the number of selected objects of the specified type. Selection.h  

int32 CountSelections ( UClass* ClassToCount,
bool bIgnorePendingKill
)

 Untemplated version of CountSelections. Selection.h  

void Deselect ( UObject* InObject
)

 Deselects the specified object. Selection.h  

void DeselectAll ( UClass* InClass
)

 Deselects all objects of the specified class, if no class is specified it deselects all objects. Selection.h  

void EndBatchSelectOperation ( bool bNotify
)

 Should be called when selection operations are complete. Selection.h  

void ForceBatchDirty()

 If batch selection is active, sets flag indicating something actually changed. Selection.h  

UObject * GetBottom ( const UClass* InClass
)

 Returns the last selected object of the specified class. Selection.h  

T * GetBottom ()

 Returns the last selected object. Selection.h  

UTypedElementSelectionSet * GetElementSelectionSet()

 Get the element selection set instance for this selection set, if any. Selection.h  

UObject * GetSelectedObject ( const int32 InIndex
) const

   Selection.h  

int32 GetSelectedObjects ( TArray< TWeakObjectPtr< UObject > >& OutSelectedObjects
)

   Selection.h  

int32 GetSelectedObjects ( UClass* FilterClass,
TArray< UObject* >& OutSelectedObjects
)

   Selection.h  

int32 GetSelectedObjects ( TArray< T* >& OutSelectedObjects
)

 Fills in the specified array with all selected objects of the desired type. Selection.h  

UObject * GetTop ( const UClass* InClass,
const UClass* RequiredInterface,
bool bArchetypesOnly
)

 Returns the first selected object of the specified class. Selection.h  

T * GetTop ()

 Returns the first selected object. Selection.h  

bool IsBatchSelecting()

   Selection.h  

bool IsClassSelected ( UClass* Class
) const

   Selection.h  

bool IsSelected ( const UObject* InObject
) const

 Returns true if the specified object is non-NULL and selected. Selection.h  

void NoteSelectionChanged()

 Manually invoke a selection changed notification for this set. Selection.h  

int32 Num ()

 Returns the number of objects in the selection set. Selection.h  

void Select ( UObject* InObject
)

 Selects the specified object. Selection.h  

void Select ( UObject* InObject,
bool bSelect
)

 Selects or deselects the specified object, depending on the value of the bSelect flag. Selection.h  

void SetElementSelectionSet ( UTypedElementSelectionSet* InElementSelectionSet
)

 Set the element selection set instance for this selection set. Selection.h  

void ToggleSelect ( UObject* InObject
)

 Toggles the selection state of the specified object. Selection.h  

Overridden from UObject

Name Remarks Include Path Unreal Specifiers

virtual bool Modify ( bool bAlwaysMarkDirty
)

   Selection.h  

virtual void Serialize ( FArchive& Ar
)

   Selection.h  

Static

Name Remarks Include Path Unreal Specifiers

static USelection * CreateActorSelection ( UObject* InOuter,
FName InName,
EObjectFlags InFlags
)

   Selection.h  

static USelection * CreateComponentSelection ( UObject* InOuter,
FName InName,
EObjectFlags InFlags
)

   Selection.h  

static USelection * CreateObjectSelection ( UObject* InOuter,
FName InName,
EObjectFlags InFlags
)

   Selection.h  

static void NoteUnknownSelectionChanged()

 Manually invoke a selection changed notification for no specific set. Legacy BSP code only! Selection.h  

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