C++ FSlateWindowElementList::GetWindow方法代码示例

int32 FSlateWindowElementList::FDeferredPaint::ExecutePaint( int32 LayerId, FSlateWindowElementList& OutDrawElements ) const
{
	TSharedPtr<const SWidget> WidgetToPaint = WidgetToPaintPtr.Pin();
	if ( WidgetToPaint.IsValid() )
	{
		return WidgetToPaint->Paint( Args, AllottedGeometry, OutDrawElements.GetWindow()->GetClippingRectangleInWindow(), OutDrawElements, LayerId, WidgetStyle, bParentEnabled );
	}

	return LayerId;
}

int32 STutorialWrapper::OnPaint(const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	if(OnWidgetHighlightDelegate.IsBound() && OnWidgetHighlightDelegate.Execute(Name))
	{
		float AlphaFactor;
		float PulseFactor;
		FLinearColor ShadowTint;
		FLinearColor BorderTint;
		GetAnimationValues(AlphaFactor, PulseFactor, ShadowTint, BorderTint);

		const FSlateBrush* ShadowBrush = FCoreStyle::Get().GetBrush(TEXT("Tutorials.Shadow"));
		const FSlateBrush* BorderBrush = FCoreStyle::Get().GetBrush(TEXT("Tutorials.Border"));
					
		const FGeometry& WidgetGeometry = CachedGeometry;
		const FVector2D WindowPos = OutDrawElements.GetWindow()->GetPositionInScreen();
		const FVector2D WindowSize = OutDrawElements.GetWindow()->GetSizeInScreen();

		// We should be clipped by the window size, not our containing widget, as we want to draw outside the widget
		FSlateRect WindowClippingRect(0.0f, 0.0f, WindowSize.X, WindowSize.Y);
		// We want to draw on-top of everything else
		int32 OverlayLayerId = MAX_int32 - 2;

		FPaintGeometry ShadowGeometry((WidgetGeometry.AbsolutePosition - FVector2D(ShadowBrush->Margin.Left, ShadowBrush->Margin.Top) * ShadowBrush->ImageSize * WidgetGeometry.Scale * TutorialConstants::ShadowScale) - WindowPos,
										((WidgetGeometry.Size * WidgetGeometry.Scale) + (FVector2D(ShadowBrush->Margin.Right * 2.0f, ShadowBrush->Margin.Bottom * 2.0f) * ShadowBrush->ImageSize * WidgetGeometry.Scale * TutorialConstants::ShadowScale)),
										WidgetGeometry.Scale * TutorialConstants::ShadowScale);
		// draw highlight shadow
		FSlateDrawElement::MakeBox(OutDrawElements, OverlayLayerId + 0, ShadowGeometry, ShadowBrush, WindowClippingRect, ESlateDrawEffect::None, ShadowTint);

		FVector2D PulseOffset = FVector2D(PulseFactor * TutorialConstants::MaxBorderOffset, PulseFactor * TutorialConstants::MaxBorderOffset);

		FVector2D BorderPosition = (WidgetGeometry.AbsolutePosition - ((FVector2D(BorderBrush->Margin.Left, BorderBrush->Margin.Top) * BorderBrush->ImageSize * WidgetGeometry.Scale) + PulseOffset)) - WindowPos;
		FVector2D BorderSize = ((WidgetGeometry.Size * WidgetGeometry.Scale) + (PulseOffset * 2.0f) + (FVector2D(BorderBrush->Margin.Right * 2.0f, BorderBrush->Margin.Bottom * 2.0f) * BorderBrush->ImageSize * WidgetGeometry.Scale));

		FPaintGeometry BorderGeometry(BorderPosition, BorderSize, WidgetGeometry.Scale);

		// draw highlight border
		FSlateDrawElement::MakeBox(OutDrawElements, OverlayLayerId + 1, BorderGeometry, BorderBrush, WindowClippingRect, ESlateDrawEffect::None, BorderTint);
	}

	return SBorder::OnPaint(AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled);
}

int32 STutorialButton::OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
{
	LayerId = SCompoundWidget::OnPaint(Args, AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled) + 1000;

	if ( PulseAnimation.IsPlaying() )
	{
		float AlphaFactor0 = 0.0f;
		float AlphaFactor1 = 0.0f;
		float PulseFactor0 = 0.0f;
		float PulseFactor1 = 0.0f;
		GetAnimationValues(PulseAnimation.GetLerp(), AlphaFactor0, PulseFactor0, AlphaFactor1, PulseFactor1);

		const FSlateBrush* PulseBrush = FEditorStyle::Get().GetBrush(TEXT("TutorialLaunch.Circle"));
		const FLinearColor PulseColor = FEditorStyle::Get().GetColor(TEXT("TutorialLaunch.Circle.Color"));

		// We should be clipped by the window size, not our containing widget, as we want to draw outside the widget
		const FVector2D WindowSize = OutDrawElements.GetWindow()->GetSizeInScreen();
		FSlateRect WindowClippingRect(0.0f, 0.0f, WindowSize.X, WindowSize.Y);

		{
			FVector2D PulseOffset = FVector2D(PulseFactor0 * TutorialButtonConstants::MaxPulseOffset, PulseFactor0 * TutorialButtonConstants::MaxPulseOffset);

			FVector2D BorderPosition = (AllottedGeometry.AbsolutePosition - ((FVector2D(PulseBrush->Margin.Left, PulseBrush->Margin.Top) * PulseBrush->ImageSize * AllottedGeometry.Scale) + PulseOffset));
			FVector2D BorderSize = ((AllottedGeometry.Size * AllottedGeometry.Scale) + (PulseOffset * 2.0f) + (FVector2D(PulseBrush->Margin.Right * 2.0f, PulseBrush->Margin.Bottom * 2.0f) * PulseBrush->ImageSize * AllottedGeometry.Scale));

			FPaintGeometry BorderGeometry(BorderPosition, BorderSize, AllottedGeometry.Scale);

			// draw highlight border
			FSlateDrawElement::MakeBox(OutDrawElements, LayerId++, BorderGeometry, PulseBrush, WindowClippingRect, ESlateDrawEffect::None, FLinearColor(PulseColor.R, PulseColor.G, PulseColor.B, AlphaFactor0));
		}

		{
			FVector2D PulseOffset = FVector2D(PulseFactor1 * TutorialButtonConstants::MaxPulseOffset, PulseFactor1 * TutorialButtonConstants::MaxPulseOffset);

			FVector2D BorderPosition = (AllottedGeometry.AbsolutePosition - ((FVector2D(PulseBrush->Margin.Left, PulseBrush->Margin.Top) * PulseBrush->ImageSize * AllottedGeometry.Scale) + PulseOffset));
			FVector2D BorderSize = ((AllottedGeometry.Size * AllottedGeometry.Scale) + (PulseOffset * 2.0f) + (FVector2D(PulseBrush->Margin.Right * 2.0f, PulseBrush->Margin.Bottom * 2.0f) * PulseBrush->ImageSize * AllottedGeometry.Scale));

			FPaintGeometry BorderGeometry(BorderPosition, BorderSize, AllottedGeometry.Scale);

			// draw highlight border
			FSlateDrawElement::MakeBox(OutDrawElements, LayerId++, BorderGeometry, PulseBrush, WindowClippingRect, ESlateDrawEffect::None, FLinearColor(PulseColor.R, PulseColor.G, PulseColor.B, AlphaFactor1));
		}
	}

	return LayerId;
}

int32 SInvalidationPanel::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	if ( GetCanCache() )
	{
		const bool bWasCachingNeeded = bNeedsCaching;

		if ( bNeedsCaching )
		{
			SInvalidationPanel* MutableThis = const_cast<SInvalidationPanel*>( this );

			// Always set the caching flag to false first, during the paint / tick pass we may change something
			// to volatile and need to re-cache.
			bNeedsCaching = false;

			bIsInvalidating = true;

			if ( !CachedWindowElements.IsValid() || CachedWindowElements->GetWindow() != OutDrawElements.GetWindow() )
			{
				CachedWindowElements = MakeShareable(new FSlateWindowElementList(OutDrawElements.GetWindow()));
			}
			else
			{
				CachedWindowElements->Reset();
			}

			// Reset the cached node pool index so that we effectively reset the pool.
			LastUsedCachedNodeIndex = 0;

			RootCacheNode = CreateCacheNode();
			RootCacheNode->Initialize(Args, SharedThis(MutableThis), AllottedGeometry, MyClippingRect);

			//TODO: When SWidget::Paint is called don't drag self if volatile, and we're doing a cache pass.
			CachedMaxChildLayer = SCompoundWidget::OnPaint(
				Args.EnableCaching(SharedThis(MutableThis), RootCacheNode, true, false),
				AllottedGeometry,
				MyClippingRect,
				*CachedWindowElements.Get(),
				LayerId,
				InWidgetStyle,
				bParentEnabled);

			if ( bCacheRelativeTransforms )
			{
				CachedAbsolutePosition = AllottedGeometry.Position;
			}

			LastLayerId = LayerId;
			LastHitTestIndex = Args.GetLastHitTestIndex();

			bIsInvalidating = false;
		}

		// The hit test grid is actually populated during the initial cache phase, so don't bother
		// recording the hit test geometry on the same frame that we regenerate the cache.
		if ( bWasCachingNeeded == false )
		{
			RootCacheNode->RecordHittestGeometry(Args.GetGrid(), Args.GetLastHitTestIndex());
		}

		if ( bCacheRelativeTransforms )
		{
			FVector2D DeltaPosition = AllottedGeometry.Position - CachedAbsolutePosition;

			const TArray<FSlateDrawElement>& CachedElements = CachedWindowElements->GetDrawElements();
			const int32 CachedElementCount = CachedElements.Num();
			for ( int32 Index = 0; Index < CachedElementCount; Index++ )
			{
				const FSlateDrawElement& LocalElement = CachedElements[Index];
				FSlateDrawElement AbsElement = LocalElement;

				AbsElement.SetPosition(LocalElement.GetPosition() + DeltaPosition);
				AbsElement.SetClippingRect(LocalElement.GetClippingRect().OffsetBy(DeltaPosition));

				OutDrawElements.AddItem(AbsElement);
			}
		}
		else
		{
			OutDrawElements.AppendDrawElements(CachedWindowElements->GetDrawElements());
		}

		int32 OutMaxChildLayer = CachedMaxChildLayer;

		// Paint the volatile elements
		if ( CachedWindowElements.IsValid() )
		{
			OutMaxChildLayer = FMath::Max(CachedMaxChildLayer, CachedWindowElements->PaintVolatile(OutDrawElements));
		}

#if !UE_BUILD_SHIPPING

		if ( IsInvalidationDebuggingEnabled() )
		{
			// Draw a green or red border depending on if we were invalidated this frame.
			{
				check(Args.IsCaching() == false);
				//const bool bShowOutlineAsCached = Args.IsCaching() || bWasCachingNeeded == false;
				const FLinearColor DebugTint = bWasCachingNeeded ? FLinearColor::Red : FLinearColor::Green;

				FGeometry ScaledOutline = AllottedGeometry.MakeChild(FVector2D(0, 0), AllottedGeometry.GetLocalSize() * AllottedGeometry.Scale, Inverse(AllottedGeometry.Scale));
//.........这里部分代码省略.........