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API > API/Runtime > API/Runtime/UMG > API/Runtime/UMG/Components
Inheritance Hierarchy
- UObjectBase
- UObjectBaseUtility
- UObject
- UVisual
- UWidget
- UListViewBase
- UListView
- UTreeView
- UCommonTreeView
- UEditorUtilityTreeView
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 * > > | STreeView construction helper - useful if using a custom STreeView subclass | |
 |
void | ExpandAll () |
Expands all items with children |
 |
void | SetItemExpansion
(
UObject* Item, |
Attempts to expand/collapse the given item (only relevant if the item has children) |
 |
void | SetOnGetItemChildren
(
ObjectT* InUserObject, |
|
 |
void | SetOnGetItemChildren
(
TSharedRef< ObjectT > InUserObject, |
Overridden from UListViewBase
| Type | Name | Description | |
|---|---|---|---|
  |
TSharedRef< STableViewBase > | 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, |
TreeViews only. |
  |
void | OnItemClickedInternal
(
UObject* Item |
ListView events - implement these instead of binding handlers directly to a list |
  |
void | OnItemExpansionChangedInternal
(
UObject* Item, |