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SListView

A ListView widget observes an array of data items and creates visual representations of these items.

API > API/Runtime > API/Runtime/Slate

A ListView widget observes an array of data items and creates visual representations of these items. ListView relies on the property that holding a reference to a value ensures its existence. In other words, neither SListView nor SListView are valid, while SListView< TSharedPtr > and SListView< UObject* > are valid.

A trivial use case appear below:

Given: TArray< TSharedPtr > Items;

SNew( SListView< TSharedPtr > ) .ListItemsSource( &Items ) .OnGenerateRow(this, &MyClass::GenerateItemRow)

The ListView will create widgets based on data items in the Items TArray. When the ListView needs to generate an item, it will do so using the specified OnGenerateRow method.

A sample implementation of MyClass::GenerateItemRow has to return a STableRow with optional content:

TSharedRef MyClass::GenerateItemRow(TSharedPtr Item, const TSharedRef& OwnerTable) { return SNew(STableRow>, OwnerTable) [ SNew(STextBlock) .Text(*Item) ]; }

   
Name SListView
Type class
Header File /Engine/Source/Runtime/Slate/Public/Widgets/Views/SListView.h
Include Path #include "Widgets/Views/SListView.h"

Syntax

template<typename ItemType>  
class SListView :  
    public STableViewBase ,  
    private TListTypeTraits< T, Enable >::SerializerType,  
    public ITypedTableView< ItemType >

Inheritance Hierarchy

Implements Interfaces

Derived Classes

SListView derived class hierarchy

Constructors

Name Remarks Include Path Unreal Specifiers

PRAGMA_DISABLE_DEPRECATION_WARNINGS SListView ( ETableViewMode::Type InListMode
)

   Widgets/Views/SListView.h  

Classes

Name Remarks
FSlateAccessibleListView An accessible implementation for SListView to be exposed to platform accessibility APIs.
FWidgetGenerator A WidgetGenerator is a component responsible for creating widgets from data items.
SListViewPinnedRowWidget Private class that acts as a wrapper around PinnedRows, to allow for customized styling.

Structs

Name Remarks
FArguments  
FGenerationPassGuard  

Typedefs

Name Type Remarks Include Path
FIsSelectableOrNavigable typename TSlateDelegates< ItemType >::FIsSelectableOrNavigable   Widgets/Views/SListView.h
FOnEntryInitialized TBaseDelegate_TwoParams< void, ItemType, const TSharedRef< ITableRow > & >   Widgets/Views/SListView.h
FOnGenerateRow typename TSlateDelegates< ItemType >::FOnGenerateRow   Widgets/Views/SListView.h
FOnItemScrolledIntoView typename TSlateDelegates< ItemType >::FOnItemScrolledIntoView   Widgets/Views/SListView.h
FOnItemToString_Debug TSlateDelegates< ItemType >::FOnItemToString_Debug   Widgets/Views/SListView.h
FOnMouseButtonClick typename TSlateDelegates< ItemType >::FOnMouseButtonClick   Widgets/Views/SListView.h
FOnMouseButtonDoubleClick typename TSlateDelegates< ItemType >::FOnMouseButtonDoubleClick   Widgets/Views/SListView.h
FOnRefreshRow typename TSlateDelegates< ItemType >::FOnRefreshRow   Widgets/Views/SListView.h
FOnSelectionChanged typename TSlateDelegates< NullableItemType >::FOnSelectionChanged   Widgets/Views/SListView.h
FOnWidgetToBeRemoved TBaseDelegate_OneParam< void, const TSharedRef< ITableRow > & >   Widgets/Views/SListView.h
MapKeyFuncs typename TListTypeTraits< ItemType >::MapKeyFuncs   Widgets/Views/SListView.h
MapKeyFuncsSparse typename TListTypeTraits< ItemType >::MapKeyFuncsSparse   Widgets/Views/SListView.h
NullableItemType typename TListTypeTraits< ItemType >::NullableType   Widgets/Views/SListView.h
TItemSet TSet< TObjectPtrWrapTypeOf< ItemType >, typename TListTypeTraits< TObjectPtrWrapTypeOf< ItemType > >::SetKeyFuncs >   Widgets/Views/SListView.h

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
ViewSource TUniquePtr< UE::Slate::ItemsSource::IItemsSource< ItemType > > Pointer to the source data that we are observing Widgets/Views/SListView.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

virtual void AddReferencedObjects ( FReferenceCollector& Collector
)

 Lists and Trees serialize items that they observe because they rely on the property that holding a reference means it will not be garbage collected. Widgets/Views/SListView.h  

void BindToRefreshRow ( const FOnRefreshRow& Binding
)

   Widgets/Views/SListView.h  

void CancelScrollIntoView()

 Cancels a previous request to scroll an item into view (cancels navigation requests as well). Widgets/Views/SListView.h  

void ClearHighlightedItems()

 Empty the highlighted item set. Widgets/Views/SListView.h  

void ClearItemsSource()

   Widgets/Views/SListView.h  

void ClearSelection()

 Empty the selection set. Widgets/Views/SListView.h  

void Construct ( const typename SListView< ItemType >::FArguments& InArgs
)

 Construct this widget Widgets/Views/SListView.h  

virtual TSharedRef< ITableRow > GenerateNewPinnedWidget ( ItemType InItem,
const int32 ItemIndex,
const int32 NumPinnedItems
)

   Widgets/Views/SListView.h  

virtual TSharedRef< ITableRow > GenerateNewWidget ( ItemType InItem
)

 Given an data item, generate a widget corresponding to it. Widgets/Views/SListView.h  

void GeneratePinnedWidgetForItem ( const ItemType& CurItem,
int32 ItemIndex,
int32 NumPinnedItems,
float LayoutScaleMultiplier
)

   Widgets/Views/SListView.h  

float GenerateWidgetForItem ( const ItemType& CurItem,
int32 ItemIndex,
int32 StartIndex,
float LayoutScaleMultiplier
)

   Widgets/Views/SListView.h  

TArrayView< const ItemType > GetItems()

   Widgets/Views/SListView.h  

FVector2D GetMaxRowSizeForColumn ( const FName& ColumnId,
EOrientation ColumnOrientation
)

 Will determine the max row size for the specified column id Widgets/Views/SListView.h  

int32 GetNumItemsSelected()

 Gets the number of selected items. Widgets/Views/SListView.h  

virtual FString GetReferencerName()

   Widgets/Views/SListView.h  

int32 GetSelectedItems ( TArray< ItemType >& SelectedItemArray
) const

   Widgets/Views/SListView.h  

bool HasValidItemsSource()

   Widgets/Views/SListView.h  

bool IsItemSelected ( const ItemType& InItem
) const

 Test if the current item is selected. Widgets/Views/SListView.h  

bool IsItemVisible ( ItemType Item
) const

 Checks whether the specified item is currently visible in the list view. Widgets/Views/SListView.h  

const TObjectPtrWrapTypeOf< ItemType > * ItemFromWidget ( const ITableRow* WidgetToFind
) const

 Given a Widget, find the corresponding data item. Widgets/Views/SListView.h  

void Private_OnEntryInitialized ( ItemType TheItem,
const TSharedRef< ITableRow >& TableRow
)

 A low-level interface for use various widgets generated by ItemsWidgets(Lists, Trees, etc). Widgets/Views/SListView.h  

void ReGeneratePinnedItems ( const TArray< ItemType >& InItems,
const FGeometry& MyGeometry,
int32 MaxPinnedItemsOverride
)

   Widgets/Views/SListView.h  

void RequestNavigateToItem ( ItemType Item,
const uint32 UserIndex
)

 Navigate to a specific item, scrolling it into view if needed. Widgets/Views/SListView.h  

void RequestScrollIntoView ( ItemType ItemToView,
const uint32 UserIndex,
const bool NavigateOnScrollIntoView
)

   Widgets/Views/SListView.h  

void RequestScrollIntoView ( ItemType ItemToView,
const uint32 UserIndex
)

 Scroll an item into view. If the item is not found, fails silently. Widgets/Views/SListView.h  

void SetItemHighlighted ( const ItemType& TheItem,
bool bHighlighted
)

 Set the highlighted state of an item. Widgets/Views/SListView.h  

void SetItemSelection ( TConstArrayView< ItemType > InItems,
bool bSelected,
ESelectInfo::Type SelectInfo
)

 Set the selection state of multiple items. Widgets/Views/SListView.h  

void SetItemSelection ( const ItemType& InItem,
bool bSelected,
ESelectInfo::Type SelectInfo
)

 Set the selection state of an item. Widgets/Views/SListView.h  

void SetItemsSource ( const TArray< ItemType >* InListItemsSource
)

 Establishes a wholly new list of items being observed by the list. Widgets/Views/SListView.h  

void SetItemsSource ( TSharedRef<::UE::Slate::Containers::TObservableArray< ItemType > > InListItemsSource
)

 Establishes a wholly new list of items being observed by the list. Widgets/Views/SListView.h  
Establishes a wholly new list of items being observed by the list. Widgets/Views/SListView.h  

void SetListItemsSource ( const TArray< ItemType >& InListItemsSource
)

   Widgets/Views/SListView.h  

void SetOnEntryInitialized ( const FOnEntryInitialized& Delegate
)

 Sets the OnEntryInitializer delegate. Widgets/Views/SListView.h  

void SetScrollIntoViewAlignment ( EScrollIntoViewAlignment NewScrollIntoViewAlignment
)

 Sets ScrollIntoViewAlignment which allows to stick the selected item to either side or center Widgets/Views/SListView.h  

void SetSelection ( ItemType SoleSelectedItem,
ESelectInfo::Type SelectInfo
)

 Set the currently selected Item. Widgets/Views/SListView.h  

void SetSelectionMode ( const TAttribute< ESelectionMode::Type >& NewSelectionMode
)

 Set the current selection mode of the list. Widgets/Views/SListView.h  

void SetShadowBoxStyle ( const FScrollBoxStyle* InScrollBoxStyle
)

   Widgets/Views/SListView.h  

void SetStyle ( const FTableViewStyle* InStyle
)

   Widgets/Views/SListView.h  

Overridden from STableViewBase

Name Remarks Include Path Unreal Specifiers

virtual int32 GetNumItemsBeingObserved()

   Widgets/Views/SListView.h  

virtual void RebuildList()

 Completely wipe existing widgets and fully regenerate them on next tick. Widgets/Views/SListView.h  

virtual FReGenerateResults ReGenerateItems ( const FGeometry& MyGeometry
)

 Update generate Widgets for Items as needed and clean up any Widgets that are no longer needed. Widgets/Views/SListView.h  

virtual void UpdateSelectionSet()

 Remove any items that are no longer in the list from the selection set. Widgets/Views/SListView.h  

Overridden from SWidget

Name Remarks Include Path Unreal Specifiers

virtual TSharedRef< FSlateAccessibleWidget > CreateAccessibleWidget()

   Widgets/Views/SListView.h  

virtual TOptional< FText > GetDefaultAccessibleText ( EAccessibleType AccessibleType
) const

   Widgets/Views/SListView.h  

virtual FReply OnKeyDown ( const FGeometry& MyGeometry,
const FKeyEvent& InKeyEvent
)

   Widgets/Views/SListView.h  

virtual FReply OnMouseButtonDown ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

   Widgets/Views/SListView.h  

virtual FReply OnMouseButtonUp ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

   Widgets/Views/SListView.h  

virtual FNavigationReply OnNavigation ( const FGeometry& MyGeometry,
const FNavigationEvent& InNavigationEvent
)

   Widgets/Views/SListView.h  

virtual bool SupportsKeyboardFocus()

   Widgets/Views/SListView.h  

Overridden from ITypedTableView

Name Remarks Include Path Unreal Specifiers

virtual TSharedRef< SWidget > AsWidget()

   Widgets/Views/SListView.h  

virtual TArray< ItemType > GetSelectedItems ()

 Returns a list of selected item indices, or an empty array if nothing is selected Widgets/Views/SListView.h  

virtual ETableViewMode::Type GetTableViewMode()

   Widgets/Views/SListView.h  

virtual void Private_ClearHighlightedItems()

 Empty the set of highlighted items. Widgets/Views/SListView.h  

virtual void Private_ClearSelection()

 Empty the selection set. Widgets/Views/SListView.h  

virtual bool Private_DoesItemHaveChildren ( int32 ItemIndexInList
) const

   Widgets/Views/SListView.h  

virtual int32 Private_GetNestingDepth ( int32 ItemIndexInList
) const

   Widgets/Views/SListView.h  

virtual int32 Private_GetNumSelectedItems()

   Widgets/Views/SListView.h  

virtual EOrientation Private_GetOrientation()

   Widgets/Views/SListView.h  

virtual ESelectionMode::Type Private_GetSelectionMode()

   Widgets/Views/SListView.h  

virtual const TBitArray & Private_GetWiresNeededByDepth ( int32 ItemIndexInList
) const

   Widgets/Views/SListView.h  

virtual bool Private_HasSelectorFocus ( const ItemType& TheItem
) const

 Test if the item passed in has selector focus. Widgets/Views/SListView.h  

virtual bool Private_IsItemExpanded ( const ItemType& TheItem
) const

   Widgets/Views/SListView.h  

virtual bool Private_IsItemHighlighted ( const ItemType& TheItem
) const

 Test if the current item should be highlighted. This is separate from hover highlights. Widgets/Views/SListView.h  

virtual bool Private_IsItemSelectableOrNavigable ( const ItemType& TheItem
) const

 Test if the current item can be selected or navigated to. Widgets/Views/SListView.h  

virtual bool Private_IsItemSelected ( const ItemType& TheItem
) const

 Test if the current item is selected. Widgets/Views/SListView.h  

virtual bool Private_IsLastChild ( int32 ItemIndexInList
) const

   Widgets/Views/SListView.h  

virtual bool Private_IsPendingRefresh()

 Is the list pending a refresh? Widgets/Views/SListView.h  

virtual const TObjectPtrWrapTypeOf< ItemType > * Private_ItemFromWidget ( const ITableRow* TheWidget
) const

 Given a Widget, find the corresponding data item. Widgets/Views/SListView.h  

virtual void Private_OnExpanderArrowShiftClicked ( ItemType TheItem,
bool bShouldBeExpanded
)

 Called when the expander arrow for the given item is shift+clicked. Widgets/Views/SListView.h  

virtual bool Private_OnItemClicked ( ItemType TheItem
)

 Called when the item is clicked, and returns whether or not the event was handled Widgets/Views/SListView.h  

virtual bool Private_OnItemDoubleClicked ( ItemType TheItem
)

 Called when the item is double-clicked, and returns whether or not the event was handled Widgets/Views/SListView.h  

virtual void Private_OnItemRightClicked ( ItemType TheItem,
const FPointerEvent& MouseEvent
)

 Called when the item is right-clicked when not right mouse scrolling Widgets/Views/SListView.h  

virtual void Private_SelectRangeFromCurrentTo ( ItemType SelectorItem
)

 Select a range of items from the current RangeSelectionStart to the SelectorItem Does not cause an OnSelectionChanged()! Widgets/Views/SListView.h  

virtual void Private_SetItemExpansion ( ItemType TheItem,
bool bShouldBeExpanded
)

 Set whether some data item is expanded or not. Widgets/Views/SListView.h  

virtual void Private_SetItemHighlighted ( ItemType TheItem,
bool bShouldBeHighlighted
)

 Enable a soft highlight on the element. Widgets/Views/SListView.h  

virtual void Private_SetItemSelection ( ItemType TheItem,
bool bShouldBeSelected,
bool bWasUserDirected
)

 Set the selection state of an item. Does not cause an OnSelectionChanged()! Widgets/Views/SListView.h  

virtual void Private_SignalSelectionChanged ( ESelectInfo::Type SelectInfo
)

 Notify the ItemsWidget that we changed its selection. Triggers as OnSelectionChanged(). Widgets/Views/SListView.h  

virtual bool Private_UsesSelectorFocus()

 Returns whether the table view uses selector focus. Widgets/Views/SListView.h  

virtual TSharedPtr< ITableRow > WidgetFromItem ( const ItemType& InItem
) const

 Find a widget for this item if it has already been constructed. Widgets/Views/SListView.h  

Protected

Name Remarks Include Path Unreal Specifiers

virtual void NavigationSelect ( const ItemType& InItemToSelect,
const FInputEvent& InInputEvent
)

 Selects the specified item and scrolls it into view. Widgets/Views/SListView.h  

virtual void NavigationSelect ( const ItemType& InItemToSelect,
const FNavigationEvent& InNavigationEvent
)

 Special handling for navigation events Widgets/Views/SListView.h  

FReply OnKeyDown_Internal ( const FGeometry& MyGeometry,
const FKeyEvent& InKeyEvent
)

   Widgets/Views/SListView.h  

TOptional< ItemType > Private_FindNextSelectableOrNavigable ( const ItemType& InItemToSelect
)

   Widgets/Views/SListView.h  

TOptional< ItemType > Private_FindNextSelectableOrNavigableWithIndexAndDirection ( const ItemType& InItemToSelect,
int32 SelectionIdx,
bool bSelectForward
)

   Widgets/Views/SListView.h  

Overridden from STableViewBase

Name Remarks Include Path Unreal Specifiers

virtual void NotifyFinishedScrolling ()

 Called at the end of a Tick when Widgets/Views/SListView.h  

virtual void NotifyItemScrolledIntoView()

 Called when an item has entered the visible geometry to check to see if the ItemScrolledIntoView delegate should be fired. Widgets/Views/SListView.h  

virtual float ScrollBy ( const FGeometry& MyGeometry,
float ScrollByAmount,
EAllowOverscroll InAllowOverscroll
)

 Scroll the list view by some number of screen units. Widgets/Views/SListView.h  

virtual EScrollIntoViewResult ScrollIntoView ( const FGeometry& ListViewGeometry
)

 If there is a pending request to scroll an item into view, do so. Widgets/Views/SListView.h  

Static

Name Remarks Include Path Unreal Specifiers

static FOnItemToString_Debug GetDefaultDebugDelegate()

   Widgets/Views/SListView.h  

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