119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "UObject/GCObject.h"
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#include "Layout/Visibility.h"
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#include "Layout/Geometry.h"
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#include "Widgets/SWidget.h"
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#include "Layout/Children.h"
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#include "Widgets/DeclarativeSyntaxSupport.h"
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#include "Widgets/SCompoundWidget.h"
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#include "FastUpdate/SlateInvalidationRoot.h"
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#include "Input/HittestGrid.h"
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class FPaintArgs;
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class FSlateRenderDataHandle;
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class FSlateWindowElementList;
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class SWindow;
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template <>
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struct TWidgetTypeTraits<class SInvalidationPanel>
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{
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static constexpr bool SupportsInvalidation() { return true; }
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};
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class SInvalidationPanel : public SCompoundWidget, public FSlateInvalidationRoot
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{
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SLATE_DECLARE_WIDGET_API(SInvalidationPanel, SCompoundWidget, SLATE_API)
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public:
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SLATE_BEGIN_ARGS( SInvalidationPanel )
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#if UE_SLATE_WITH_DYNAMIC_INVALIDATION
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: _UseDynamicInvalidation(false)
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#endif
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{
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_Visibility = EVisibility::SelfHitTestInvisible;
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}
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SLATE_DEFAULT_SLOT(FArguments, Content)
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#if UE_SLATE_WITH_DYNAMIC_INVALIDATION
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SLATE_ARGUMENT(bool, UseDynamicInvalidation)
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#endif
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#if !UE_BUILD_SHIPPING
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SLATE_ARGUMENT(FString, DebugName)
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#endif
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SLATE_END_ARGS()
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SLATE_API SInvalidationPanel();
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SLATE_API ~SInvalidationPanel();
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#if WITH_SLATE_DEBUGGING
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static SLATE_API bool AreInvalidationPanelsEnabled();
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static SLATE_API void EnableInvalidationPanels(bool bEnable);
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#endif
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SLATE_API void Construct( const FArguments& InArgs );
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SLATE_API virtual FChildren* GetAllChildren() override;
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/** Returns true when the invalidation panel is able to cache the widgets. **/
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SLATE_API bool GetCanCache() const;
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SLATE_API void SetCanCache(bool InCanCache);
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#if UE_SLATE_WITH_DYNAMIC_INVALIDATION
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/**
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* Returns true when the invalidation panel uses Dynamic Invalidation.
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* Dynamic Invalidation means that the widget's content will only be cached if all descendant widgets support invalidation.
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**/
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SLATE_API virtual bool GetUseDynamicInvalidation() const;
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SLATE_API void SetUseDynamicInvalidation(bool InUseDynamicInvalidation);
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SLATE_API virtual bool SupportsInvalidationRecursive(bool bUseCachedValue = true) const override;
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#endif
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//~ SWidget overrides
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SLATE_API virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
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SLATE_API virtual FChildren* GetChildren() override;
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#if WITH_SLATE_DEBUGGING
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SLATE_API virtual FChildren* Debug_GetChildrenForReflector() override;
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#endif
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//~ End SWidget
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SLATE_API void SetContent(const TSharedRef< SWidget >& InContent);
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protected:
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SLATE_API virtual bool CustomPrepass(float LayoutScaleMultiplier) override;
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SLATE_API virtual bool Advanced_IsInvalidationRoot() const override;
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SLATE_API virtual const FSlateInvalidationRoot* Advanced_AsInvalidationRoot() const override;
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SLATE_API virtual TSharedRef<SWidget> GetRootWidget() override;
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SLATE_API virtual int32 PaintSlowPath(const FSlateInvalidationContext& Context) override;
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private:
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void OnGlobalInvalidationToggled(bool bGlobalInvalidationEnabled);
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bool UpdateCachePrequisites(FSlateWindowElementList& OutDrawElements, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, int32 LayerId, const FWidgetStyle& InWidgetStyle) const;
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private:
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mutable TSharedRef<FHittestGrid> HittestGrid;
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mutable TOptional<FSlateClippingState> LastClippingState;
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mutable FGeometry LastAllottedGeometry;
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mutable FVector2D LastClipRectSize;
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mutable int32 LastIncomingLayerId;
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mutable FLinearColor LastIncomingColorAndOpacity;
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bool bCanCache;
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#if UE_SLATE_WITH_DYNAMIC_INVALIDATION
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bool bUseDynamicInvalidation;
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#endif
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mutable bool bPaintedSinceLastPrepass;
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#if SLATE_VERBOSE_NAMED_EVENTS
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FString DebugName;
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FString DebugTickName;
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FString DebugPaintName;
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#endif
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mutable bool bWasCachable;
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};
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