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> Unreal Engine API Reference > Editor > UnrealEd > USelection

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USelection

Manages selections of objects.

Inheritance Hierarchy

UObjectBase

UObjectBaseUtility

UObject

USelection

References

Module	UnrealEd
Header	/Engine/Source/Editor/UnrealEd/Public/Selection.h
Include	#include "Selection.h"

Syntax

class USelection : public UObject

Remarks

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

Functions

	Name	Description
void	BeginBatchSelectOperation()	Call before beginning selection operations
int32	CountSelections ( UClass* ClassToCount, bool bIgnorePendingKill )	Untemplated version of CountSelections.
int32	CountSelections ( bool bIgnorePendingKill )	Returns the number of selected objects of the specified type.
USelection &...	CreateActorSelection ( UObject* InOuter, FName InName, EObjectFlags InFlags )	Returns the transient top-level package, which is useful for temporarily storing objects that should never be saved
USelection &...	CreateComponentSelection ( UObject* InOuter, FName InName, EObjectFlags InFlags )	Returns the transient top-level package, which is useful for temporarily storing objects that should never be saved
USelection &...	CreateObjectSelection ( UObject* InOuter, FName InName, EObjectFlags InFlags )
void	Deselect ( UObject* InObject )	Deselects the specified object.
void	DeselectAll ( UClass* InClass )	Deselects all objects of the specified class, if no class is specified it deselects all objects.
void	EndBatchSelectOperation ( bool bNotify )	Should be called when selection operations are complete.
void	ForceBatchDirty()	If batch selection is active, sets flag indicating something actually changed.
UObject *...	GetBottom ( UClass* InClass )	Returns the last selected object of the specified class.
T *	GetBottom()	Returns the last selected object.
UTypedElemen...	GetElementSelectionSet()	Get the element selection set instance for this selection set, if any.
UObject *...	GetSelectedObject ( const int32 InIndex )
int32	GetSelectedObjects ( UClass* FilterClass, TArray< UObject* >& OutSelect... )
int32	GetSelectedObjects ( TArray< TWeakObjectPtr< UObject >> ... )
int32	GetSelectedObjects ( TArray< T* >& OutSelectedObje... )	Fills in the specified array with all selected objects of the desired type.
UObject *...	GetTop ( UClass* InClass, UClass* RequiredInterface, bool bArchetypesOnly )	Returns the first selected object of the specified class.
T *	GetTop()	Returns the first selected object.
bool	IsBatchSelecting()
bool	IsClassSelected ( UClass* Class )
bool	IsSelected ( const UObject* InObject )	Returns true if the specified object is non-NULL and selected.
void	NoteSelectionChanged()	Manually invoke a selection changed notification for this set.
void	NoteUnknownSelectionChanged()	Manually invoke a selection changed notification for no specific set. Legacy BSP code only!
int32	Num()	Returns the number of objects in the selection set.
void	Select ( UObject* InObject )	Selects the specified object.
void	Select ( UObject* InObject, bool bSelect )	Selects or deselects the specified object, depending on the value of the bSelect flag.
void	SetElementSelectionSet ( UTypedElementSelectionSet* InE... )	Set the element selection set instance for this selection set.
void	ToggleSelect ( UObject* InObject )	Toggles the selection state of the specified object.

Overridden from UObject

		Name	Description
	bool	Modify ( bool bAlwaysMarkDirty )	Note that the object will be modified.
	void	Serialize ( FArchive& Ar )	Handles reading, writing, and reference collecting using FArchive.

Classes

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

Constants

Name	Description
SelectionChangedEvent	Called when selection in editor has changed
SelectionElementSelectionPtrChanged	Called when the assigned typed element selection pointer set for a selection is changed
SelectNoneEvent	Called to deselect everything
SelectObjectEvent	Called when an object has been selected (generally an actor)

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