API Reference

Everything public in CrimsonActionBar, including its slot-binding surface.

UCrimsonActionBarComponent

Member	Kind	Notes
`Find(PlayerController)`	static	Controller -> PlayerState -> Pawn.
`LayoutDefinition` / `SetLayoutDefinition` / `GetLayoutDefinition`	property / authority call	Replicated owner-only; swapping it rebuilds every bar.
`GetBindingStore`, `GetOwningPlayerController`	pure	Store resolved lazily (may be null early on a client).
`GetBarTags`, `GetEffectivePage`, `GetManualPage`, `GetPageCount`, `GetSlotCount`, `GetLayoutIdForPage`	pure	`PageIndex = -1` = effective page.
`SetManualPage`, `CyclePage`	call	Manual pages only; client forwards to server.
`GetSlotState`, `GetBarStates`, `GetBinding`	pure	Snapshots exist for the effective page only.
`CanAssignBinding`, `IsProviderAllowed`, `AssignBinding`, `ClearSlot`, `MoveBinding`, `TryAutoPlace`, `ResetBar`, `ResetAllBars`	call	Edits. All routed through the store; server-validated.
`PressSlot`, `ReleaseSlot`	call	What a key does; what a click calls.
`BindToInputComponent`, `RebindInput`, `UnbindInput`, `bAutoBindInput`	input	Self-owned pushed component by default.
`SetBarsLocked`, `AreBarsLocked`, `SetBarVisible`	call / pure	UX lock (client-local); hidden bars skip provider queries.
`SetBindingHighlight`, `ClearAllHighlights`	call	Proc glow; matches through the provider.
`GetKeybindTextForSlot`	BlueprintNativeEvent	Override for chord / rebind-aware text.
`SaveLayoutSet`, `ApplyLayoutSet`, `DeleteLayoutSet`, `GetLayoutSetNames`	call / pure	Store presets over every owned layout.
`GetSaveData`, `ApplySaveData`	call	`FCrimsonActionBarSaveData` (manual pages). Layouts are the store's.
`RefreshAllSlots`, `MarkResolutionDirty`	call	Force / request a re-resolve.

Delegates

Delegate	Payload	Fires
`OnSlotChanged`	`Address, State`	Identity edge: bound / cleared / stale / lock / keybind / display.
`OnSlotLiveStateChanged`	`Address, State`	Live edge: enabled, cost, cooldown start/end/restart, charges, count, active. Never per frame.
`OnSlotHighlightChanged`	`Address, bHighlighted`	Proc glow on / off.
`OnSlotInputPressed` / `OnSlotInputReleased`	`Address`	The slot's key (not a click).
`OnSlotActivationRefused`	`Address, State`	A press on an empty / stale / disabled slot.
`OnPageChanged`	`BarTag, PageIndex`	Effective page changed.
`OnLayoutRebuilt`	-	Layout definition changed or store linked; rebuild all widgets.
`OnBarsLockedChanged`	`bLocked`	UX lock toggled.

Snapshots

Type	Fields
`FCrimsonActionBarSlotAddress`	`BarTag`, `PageIndex` (-1 = effective), `SlotIndex`.
`FCrimsonActionBarSlotState`	`Address`, `Binding`, `bBound`, `bStale`, `bLocked`, `bServerOnly`, `bHighlighted`, `KeybindText`, `Display` (`FCrimsonSlotBindingDisplay`: `DisplayName`, `Description`, `Icon`, `CountText`), `Live` (`FCrimsonSlotBindingLiveState`: `bEnabled`, `DisabledReason`, `CooldownRemaining/Duration`, `GlobalCooldownRemaining/Duration`, `bActive`, `Charges`, `MaxCharges`, `Count`, `bCostMet`, `FailureTags`), `CooldownEndWorldTime`, `GlobalCooldownEndWorldTime`, `ResolvedObject`.
`FCrimsonActionBarManualPage`	`BarTag`, `PageIndex`.
`FCrimsonActionBarSaveData`	`ManualPages`.

Layout

Type	Fields
`UCrimsonActionBarLayoutDefinition`	`Bars`, `Providers` (Instanced), `MappingContext`, `MappingContextPriority`, `SharedSlotPlacements`; `FindBar`, `GetAllLayoutIds`, `GetSlotPlacements` / `GetMutableSlotPlacements` (a bar's own list or the shared one), `ResolveSlotPlacement` (the effective placement of a slot index, Style blanks filled, row fallback past the end), `FallbackSlotSize`; editor `IsDataValid`.
`FCrimsonActionBarDefinition`	`BarTag`, `DisplayName`, `Pages`, `SlotInputActions`, `PageUpAction`, `PageDownAction`, `PressMode` (`ECrimsonActionBarPressMode`), `bForwardReleaseToProvider`, `StalePolicy`, `EditBlockedQuery`, `bAllowAutoPlace`, `AllowedProviders` (empty = all; `AllowsProvider`), `Style` (`FCrimsonActionBarStyle`), `ExtensionPointTag`, `ExtensionPriority`, `StalePolicy`, `EditBlockedQuery`, `bAllowAutoPlace`, `AllowedProviders` (empty = all; `AllowsProvider`), `bForwardReleaseToProvider`; `GetMaxSlotCount`, `GetPage`.
`FCrimsonActionBarStyle`	Per-bar build and shape - deliberately not a look: `BarWidgetClass` (the HUD widget the game feature action registers), `SlotWidgetClass` (what the bar widget spawns per slot), `SlotSize` (0 = widget-designed), `SlotSpacing` (-1 = widget-designed), `Arrangement` (`Flow` = the panel orders the slots; `Freeform` = every slot at its placement's position), `bUseSharedPlacements` (read the layout's `SharedSlotPlacements` instead of this bar's), `SlotPlacements`. Materials, colors and state looks belong to the slot widget (CrimsonCore's `UCrimsonCoreActionBarSlotWidget` carries `SlotMaterial`, `MaterialBinding`, `Visuals`).
`FCrimsonActionBarSlotPlacement`	One slot position, index-aligned with `SlotInputActions` (so every page of the bar shares it): `Position` (bar-local pixels, Freeform only), `Size` (0 = `Style.SlotSize`), `ZOrder` (Freeform only), `SlotWidgetClass` (unset = the Style's). Every field is an override of the bar's `Style`; read them through `ResolveSlotPlacement`, never from the array.
`FCrimsonActionBarPageDefinition`	`LayoutId`, `DisplayName`, `Slots`, `ActivationQuery`, `ActivationPriority`.
`FCrimsonSlotDefinition`	`SlotId`, `bLocked`, `bServerOnly`, `DefaultBinding`, `AcceptedEntries`, `EmptyLabel`, `EmptyIcon`.
`ECrimsonActionBarArrangement`	`Flow` (the bar widget's panel arranges slots in index order; the cheap default) or `Freeform` (slots sit at their placement coordinates on a Canvas Panel - diamonds, arcs, a big center slot).

Game feature action

Type	Fields	Notes
`UCrimsonGameFeatureAction_AddActionBars`	`ActionBarList[]`	One entry per actor class. Applies the layout on the authority at `ExtensionAdded` / `GameActorReady`; registers widget payloads once the controller has its local player.
`FCrimsonActionBarFeatureEntry`	`ActorClass`, `LayoutDefinition`, `ActionBarComponentClass` (opt.), `SlotBindingComponentClass` (opt.)	Component classes are added through `UGameFrameworkComponentManager::AddComponentRequest` only when set. No visual configuration lives here - widgets and placement come from the layout asset.
`UCrimsonActionBarWidgetPayload` (CrimsonCore)	`BarTag`, `WidgetClass`	Moved to CrimsonCore with the UI integration. Standalone, use `FCrimsonActionBarIntegrationHooks::OnBarWidgetsReady`.

Providers

Type	Payload	Notes
`UCrimsonSlotBindingProvider_Ability`	`FCrimsonSlotBindingData_Ability { Identity }`	`RequiredAbilityTagQuery`, `bDisableWhenUnavailable`, `UnavailableReason`; `MakeBindingForAbility`, `GetIdentityForAbility`, `ResolveAbilitySystem`. `CanAutoPlaceAbility(CDO)`: auto-place gate - offered by the picker AND a Presentable tag identity, so transient grants never land on the bar.
`UCrimsonSlotBindingProvider_Object`	`FCrimsonSlotBindingData_Object { Identity }`	`UseEventTag`, `ContextActionId`, `AcceptedIdentityTypes`, `bShowCount`, `bDisableWhenOutOfStock`, `OutOfStockReason`; `MakeBindingForObject`, `GatherResolvers`.
`UCrimsonSlotBindingProvider_Sequence`	`FCrimsonSlotBindingData_Sequence { Steps, DisplayName }`	First usable step fires; `MakeSequenceBinding`.
`UCrimsonSlotBindingProvider`	-	Base: `ProviderId`, `DisplayName`, the verbs in Concept: Providers and Identity, `AcceptsPayload`.
`UCrimsonSlotBindingProvider_Tag`	`FCrimsonBinding_Tag { Tag }`	Authored tag list broadcast on `MessageChannel`.

Messages and tags

Tag	Payload	Meaning
`ActionBar.Message.SlotChanged`	`FCrimsonActionBarSlotChangedMessage`	A slot snapshot changed (owning client).
`ActionBar.Message.PageChanged`	`FCrimsonActionBarPageChangedMessage`	A bar's effective page changed.
`ActionBar.Message.Highlight`	`FCrimsonActionBarHighlightMessage`	Ask bars to glow / stop glowing a binding.
`ActionBar.Provider.Ability` / `.Object` / `.Sequence`	-	Default `ProviderId`s of the shipped providers.
`SlotBinding.Identity.Ability` / `.Object`	-	Identity `TypeTag`s.

Settings

`UCrimsonActionBarSettings`	Default	Notes
`StatePollRateHz`	10	Owning-client live-state poll rate.
`GlobalCooldownTags`	empty	GCD tag intersection.
`HiddenFromActionBarQuery`	empty	Never offered by the picker.
`DefaultEditBlockedQuery`	empty	In-combat edit lock default.
`bBarsLockedByDefault`	false	UX lock initial state.

Slot-binding surface

Type	Header	Purpose
`UCrimsonSlotBindingComponent`	`SlotBinding/CrimsonSlotBindingComponent.h`	The store: `GetLayout`, `GetBinding`, `HasLayout`, `SetBinding`, `ClearBinding`, `SwapBindings`, `ResetLayout`, `EnsureLayoutSize`, presets, `AddWriteValidator` / `RemoveWriteValidator` / `ValidateWrite`, `GetSaveData` / `ApplySaveData` / `RefreshReplicationState`, `OnLayoutChanged`.
`UCrimsonSlotBindingStatics`	`SlotBinding/CrimsonSlotBindingStatics.h`	`GetEffectiveBinding`, `EntryPassesSlotFilter`, `BindingPassesSlotFilter`, `GatherEntriesForSlot`, `BuildProviderMap`, `FindProvider`.
`FCrimsonSlotBinding`, `FCrimsonSlotBindingIdentity`, `FCrimsonSlotBindingDisplay`, `FCrimsonSlotBindingLiveState`, `FCrimsonSlotBindingContext`, `FCrimsonBindableEntry`, `ECrimsonStaleBindingPolicy`, `ECrimsonSlotBindingInputEvent`	`SlotBinding/CrimsonSlotBindingTypes.h`	The vocabulary.
`ICrimsonSlotBindingPresentable`, `ICrimsonSlotBindingObjectResolver`	`SlotBinding/ICrimson...h`	Bridges (see Concept: Providers and Identity).
`UCrimsonSlotBindingAbilityAdapter` (subclass)	`Providers/CrimsonSlotBindingAbilityAdapter.h`	C++ virtuals: `GetAbilityIdentity`, `GetAbilityDisplay`, `GetAbilityFilterTags`, `RouteSlotInput`, `GetChargeState`, `GetGlobalCooldown`, `CanAffordAbility`. Object twin: `UCrimsonSlotBindingObjectAdapter` (`GetUseCooldownTag`, `UseObject`, `ExecuteContextAction`). Static hooks: `FCrimsonActionBarIntegrationHooks`.

CrimsonCore (for orientation only)

(CrimsonCore - free to download, compiles only with all Crimson plugins installed.) UCrimsonCoreActionBarComponent (chord-aware keybind text, input re-init hook, optional bAutoPlaceGrantedAbilities), UCrimsonCoreSlotBindingComponent (store + ICrimsonSaveableSystem), both on ACrimsonPlayerController as ActionBars / SlotBindings; UCrimsonCoreSlotBindingProvider_Equipment.