UTreeView | Unreal Engine 4.27 Documentation

Unreal Engine C++ API Reference > Runtime > UMG > Components

Inheritance Hierarchy

References


Module	UMG
Header	/Engine/Source/Runtime/UMG/Public/Components/TreeView.h
Include	#include "Components/TreeView.h"

Syntax

class UTreeView : public UListView

Remarks

Similar to ListView, but can display a hierarchical tree of elements. The base items source for the tree identifies the root items, each of which can have n associated child items. There is no hard limit to the nesting - child items can have children and so on

To make a widget usable as an entry in a TreeView, it must inherit from the IUserObjectListEntry interface.

Variables

	Type	Name	Description
	TSharedPtr< STreeView< UObject * > >	MyTreeView

Constructors

	Type	Name	Description
		UTreeView ( const FObjectInitializer& ObjectInitializer )

Functions

Type	Name	Description
void	CollapseAll ()	Collapses all currently expanded items
TSharedRef< TreeViewT< UObject * > >	ConstructTreeView ()	STreeView construction helper - useful if using a custom STreeView subclass
void	ExpandAll ()	Expands all items with children
void	SetItemExpansion ( UObject* Item, bool bExpandItem )	Attempts to expand/collapse the given item (only relevant if the item has children)
void	SetOnGetItemChildren ( ObjectT* InUserObject, typename TSlateDelegates< UObject* >::FOnGetChildren::TMethodPtr< ObjectT > InMethodPtr )
void	SetOnGetItemChildren ( TSharedRef< ObjectT > InUserObject, typename TSlateDelegates< UObject* >::FOnGetChildren::TMethodPtr< ObjectT > InMethodPtr )

Overridden from UListViewBase

	Type	Name	Description
	TSharedRef< STableViewBase >	RebuildListWidget ()	Implement in child classes to construct the actual ListView Slate widget

Overridden from UVisual

	Type	Name	Description
	void	ReleaseSlateResources ( bool bReleaseChildren )

Overridden from ITypedUMGListView

Type	Name	Description
void	OnGetChildrenInternal ( UObject* Item, TArray< UObject* >& OutChildren )	TreeViews only.
void	OnItemClickedInternal ( UObject* Item )	ListView events - implement these instead of binding handlers directly to a list
void	OnItemExpansionChangedInternal ( UObject* Item, bool bIsExpanded )

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