C++ FWidgetStyle类代码示例

int32 SSplitter::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	FArrangedChildren ArrangedChildren( EVisibility::Visible );
	ArrangeChildren( AllottedGeometry, ArrangedChildren );

	int32 MaxLayerId = PaintArrangedChildren( Args, ArrangedChildren, MyClippingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled );

	const FSlateBrush* NormalHandleBrush = &Style->HandleNormalBrush;

	// Draw the splitter above any children
	MaxLayerId += 1;

	for( int32 ChildIndex = 0; ChildIndex < ArrangedChildren.Num(); ++ChildIndex )
	{
		const FGeometry& GeometryAfterSplitter = ArrangedChildren[ FMath::Clamp(ChildIndex + 1, 0, ArrangedChildren.Num()-1) ].Geometry;

		const float HalfHitDetectionSplitterHandleSize = ( HitDetectionSplitterHandleSize / 2 );
		const float HalfPhysicalSplitterHandleSize = ( PhysicalSplitterHandleSize / 2 );

		FVector2D HandleSize;		
		FVector2D HandlePosition;
		if ( Orientation == Orient_Horizontal )
		{
			HandleSize.Set( PhysicalSplitterHandleSize, GeometryAfterSplitter.Size.Y );
			HandlePosition.Set( -(HalfHitDetectionSplitterHandleSize + HalfPhysicalSplitterHandleSize), 0 );
		}
		else
		{
			HandleSize.Set( GeometryAfterSplitter.Size.X, PhysicalSplitterHandleSize );
			HandlePosition.Set( 0, -(HalfHitDetectionSplitterHandleSize + HalfPhysicalSplitterHandleSize) );
		}

		if (HoveredHandleIndex != ChildIndex)
		{
			FSlateDrawElement::MakeBox(
				OutDrawElements,
				MaxLayerId,
				GeometryAfterSplitter.ToPaintGeometry( HandlePosition, HandleSize, 1.0f ),
				NormalHandleBrush,
				MyClippingRect,
				ShouldBeEnabled( bParentEnabled ),
				InWidgetStyle.GetColorAndOpacityTint() * NormalHandleBrush->TintColor.GetSpecifiedColor()
			);
		}
		else
		{
			FSlateDrawElement::MakeBox(
				OutDrawElements,
				MaxLayerId,
				GeometryAfterSplitter.ToPaintGeometry( HandlePosition, HandleSize, 1.0f ),
				&Style->HandleHighlightBrush,
				MyClippingRect,
				ShouldBeEnabled( bParentEnabled ),
				InWidgetStyle.GetColorAndOpacityTint() * Style->HandleHighlightBrush.TintColor.GetSpecifiedColor()
			);	
		}
	}

	return MaxLayerId;
}

int32 FSlateTextUnderlineLineHighlighter::OnPaint(const FPaintArgs& Args, const FTextLayout::FLineView& Line, const float OffsetX, const float Width, const FTextBlockStyle& DefaultStyle, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
{
	TSharedRef<FSlateFontCache> FontCache = FSlateApplication::Get().GetRenderer()->GetFontCache();

	const uint16 MaxHeight = FontCache->GetMaxCharacterHeight(FontInfo, AllottedGeometry.Scale);
	const int16 Baseline = FontCache->GetBaseline(FontInfo, AllottedGeometry.Scale);

	int16 UnderlinePos, UnderlineThickness;
	FontCache->GetUnderlineMetrics(FontInfo, AllottedGeometry.Scale, UnderlinePos, UnderlineThickness);

	const FVector2D Location(Line.Offset.X + OffsetX, Line.Offset.Y + MaxHeight + Baseline - (UnderlinePos * 0.5f));
	const FVector2D Size(Width, FMath::Max<int16>(1, UnderlineThickness));

	// The block size and offset values are pre-scaled, so we need to account for that when converting the block offsets into paint geometry
	const float InverseScale = Inverse(AllottedGeometry.Scale);

	if (Size.X)
	{
		const FLinearColor LineColorAndOpacity = ColorAndOpacity.GetColor(InWidgetStyle);

		const bool ShouldDropShadow = ShadowColorAndOpacity.A > 0.f && ShadowOffset.SizeSquared() > 0.f;

		// A negative shadow offset should be applied as a positive offset to the underline to avoid clipping issues
		const FVector2D DrawShadowOffset(
			(ShadowOffset.X > 0.0f) ? ShadowOffset.X * AllottedGeometry.Scale : 0.0f,
			(ShadowOffset.Y > 0.0f) ? ShadowOffset.Y * AllottedGeometry.Scale : 0.0f
			);
		const FVector2D DrawUnderlineOffset(
			(ShadowOffset.X < 0.0f) ? -ShadowOffset.X * AllottedGeometry.Scale : 0.0f,
			(ShadowOffset.Y < 0.0f) ? -ShadowOffset.Y * AllottedGeometry.Scale : 0.0f
			);

		// Draw the optional shadow
		if (ShouldDropShadow)
		{
			FSlateDrawElement::MakeBox(
				OutDrawElements,
				++LayerId,
				AllottedGeometry.ToPaintGeometry(TransformVector(InverseScale, Size), FSlateLayoutTransform(TransformPoint(InverseScale, Location + DrawShadowOffset))),
				&UnderlineBrush,
				MyClippingRect,
				bParentEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect,
				ShadowColorAndOpacity * InWidgetStyle.GetColorAndOpacityTint()
				);
		}

		// Draw underline
		FSlateDrawElement::MakeBox(
			OutDrawElements,
			++LayerId,
			AllottedGeometry.ToPaintGeometry(TransformVector(InverseScale, Size), FSlateLayoutTransform(TransformPoint(InverseScale, Location + DrawUnderlineOffset))),
			&UnderlineBrush,
			MyClippingRect,
			bParentEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect,
			LineColorAndOpacity * InWidgetStyle.GetColorAndOpacityTint()
			);
	}

	return LayerId;
}

int32 SColorWheel::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const bool bIsEnabled = ShouldBeEnabled(bParentEnabled);
	const uint32 DrawEffects = bIsEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;
	
	FSlateDrawElement::MakeBox(
		OutDrawElements,
		LayerId,
		AllottedGeometry.ToPaintGeometry(),
		Image,
		MyClippingRect,
		DrawEffects,
		InWidgetStyle.GetColorAndOpacityTint() * Image->GetTint(InWidgetStyle));

	FSlateDrawElement::MakeBox(
		OutDrawElements,
		LayerId + 1,
		AllottedGeometry.ToPaintGeometry(CalcRelativeSelectedPosition() * AllottedGeometry.Size * 0.5f - SelectorImage->ImageSize * 0.5f, SelectorImage->ImageSize),
		SelectorImage,
		MyClippingRect,
		DrawEffects,
		InWidgetStyle.GetColorAndOpacityTint() * SelectorImage->GetTint(InWidgetStyle));

	return LayerId + 1;
}

int32 FSlateTextHighlightRunRenderer::OnPaint( const FPaintArgs& Args, const FTextLayout::FLineView& Line, const TSharedRef< ISlateRun >& Run, const TSharedRef< ILayoutBlock >& Block, const FTextBlockStyle& DefaultStyle, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const 
{
	FVector2D Location( Block->GetLocationOffset() );
	Location.Y = Line.Offset.Y;

	// The block size and offset values are pre-scaled, so we need to account for that when converting the block offsets into paint geometry
	const float InverseScale = Inverse(AllottedGeometry.Scale);

	// Draw the actual highlight rectangle
	FSlateDrawElement::MakeBox(
		OutDrawElements,
		++LayerId,
		AllottedGeometry.ToPaintGeometry(TransformVector(InverseScale, FVector2D( Block->GetSize().X, Line.Size.Y )), FSlateLayoutTransform(TransformPoint(InverseScale, Location))), 
		&DefaultStyle.HighlightShape,
		MyClippingRect,
		bParentEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect,
		InWidgetStyle.GetColorAndOpacityTint() * DefaultStyle.HighlightColor
		);

	FLinearColor InvertedHighlightColor = FLinearColor::White - DefaultStyle.HighlightColor;
	InvertedHighlightColor.A = InWidgetStyle.GetForegroundColor().A;

	FWidgetStyle WidgetStyle( InWidgetStyle );
	WidgetStyle.SetForegroundColor( InvertedHighlightColor );

	return Run->OnPaint( Args, Line, Block, DefaultStyle, AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, WidgetStyle, bParentEnabled );
}

int32 SColorBlock::OnPaint( const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const FSlateBrush* GenericBrush = FCoreStyle::Get().GetBrush( "GenericWhiteBox" );

	const ESlateDrawEffect::Type DrawEffects = ESlateDrawEffect::None;
	
	FLinearColor InColor = Color.Get();
	if (ColorIsHSV.Get())
	{
		InColor = InColor.HSVToLinearRGB();
	}
	if (IgnoreAlpha.Get())
	{
		InColor.A = 1.f;
	}
	
	const FColor DrawColor = InColor.ToFColor(bUseSRGB.Get());
	if( ShowBackgroundForAlpha.Get() && DrawColor.A < 255 )
	{
		// If we are showing a background pattern and the colors is transparent, draw a checker pattern
		const FSlateBrush* CheckerBrush = FCoreStyle::Get().GetBrush("ColorPicker.AlphaBackground");
		FSlateDrawElement::MakeBox( OutDrawElements, LayerId, AllottedGeometry.ToPaintGeometry(), CheckerBrush, MyClippingRect, DrawEffects );
	}
	
	// determine if it is HDR
	const float MaxRGB = FMath::Max3(InColor.R, InColor.G, InColor.B);
	if (MaxRGB > 1.f)
	{
		FLinearColor NormalizedLinearColor = InColor / MaxRGB;
		NormalizedLinearColor.A = InColor.A;
		const FColor DrawNormalizedColor = InWidgetStyle.GetColorAndOpacityTint() * NormalizedLinearColor.ToFColor(bUseSRGB.Get());

		FLinearColor ClampedLinearColor = InColor;
		ClampedLinearColor.A = InColor.A * MaxRGB;
		const FColor DrawClampedColor = InWidgetStyle.GetColorAndOpacityTint() * ClampedLinearColor.ToFColor(bUseSRGB.Get());

		TArray<FSlateGradientStop> GradientStops;
		
		GradientStops.Add( FSlateGradientStop( FVector2D::ZeroVector, DrawNormalizedColor ) );
		GradientStops.Add( FSlateGradientStop( AllottedGeometry.Size * 0.5f, DrawClampedColor ) );
		GradientStops.Add( FSlateGradientStop( AllottedGeometry.Size, DrawNormalizedColor ) );

		FSlateDrawElement::MakeGradient(
			OutDrawElements,
			LayerId + 1,
			AllottedGeometry.ToPaintGeometry(),
			GradientStops,
			(AllottedGeometry.Size.X > AllottedGeometry.Size.Y) ? Orient_Vertical : Orient_Horizontal,
			MyClippingRect,
			DrawEffects
		);
	}
	else
	{
		FSlateDrawElement::MakeBox( OutDrawElements, LayerId + 1, AllottedGeometry.ToPaintGeometry(), GenericBrush, MyClippingRect, DrawEffects, InWidgetStyle.GetColorAndOpacityTint() * DrawColor );
	}

	return LayerId + 1;
}

int32 FSequencerTimeSliderController::OnPaintTimeSlider( bool bMirrorLabels, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const bool bEnabled = bParentEnabled;
	const ESlateDrawEffect::Type DrawEffects = bEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;

	TRange<float> LocalViewRange = TimeSliderArgs.ViewRange.Get();
	const float LocalViewRangeMin = LocalViewRange.GetLowerBoundValue();
	const float LocalViewRangeMax = LocalViewRange.GetUpperBoundValue();
	const float LocalSequenceLength = LocalViewRangeMax-LocalViewRangeMin;
	
	FVector2D Scale = FVector2D(1.0f,1.0f);
	if ( LocalSequenceLength > 0)
	{
		FScrubRangeToScreen RangeToScreen( LocalViewRange, AllottedGeometry.Size );
	
		const float MajorTickHeight = 9.0f;
	
		FDrawTickArgs Args;
		Args.AllottedGeometry = AllottedGeometry;
		Args.bMirrorLabels = bMirrorLabels;
		Args.bOnlyDrawMajorTicks = false;
		Args.TickColor = FLinearColor::White;
		Args.ClippingRect = MyClippingRect;
		Args.DrawEffects = DrawEffects;
		Args.StartLayer = LayerId;
		Args.TickOffset = bMirrorLabels ? 0.0f : FMath::Abs( AllottedGeometry.Size.Y - MajorTickHeight );
		Args.MajorTickHeight = MajorTickHeight;

		DrawTicks( OutDrawElements, RangeToScreen, Args );

		const float HandleSize = 13.0f;
		float HalfSize = FMath::TruncToFloat(HandleSize/2.0f);

		// Draw the scrub handle
		const float XPos = RangeToScreen.InputToLocalX( TimeSliderArgs.ScrubPosition.Get() );

		// Should draw above the text
		const int32 ArrowLayer = LayerId + 2;
		FPaintGeometry MyGeometry =	AllottedGeometry.ToPaintGeometry( FVector2D( XPos-HalfSize, 0 ), FVector2D( HandleSize, AllottedGeometry.Size.Y ) );
		FLinearColor ScrubColor = InWidgetStyle.GetColorAndOpacityTint();

		// @todo Sequencer this color should be specified in the style
		ScrubColor.A = ScrubColor.A*0.5f;
		ScrubColor.B *= 0.1f;
		ScrubColor.G *= 0.2f;
		FSlateDrawElement::MakeBox( 
			OutDrawElements,
			ArrowLayer, 
			MyGeometry,
			bMirrorLabels ? ScrubHandleUp : ScrubHandleDown,
			MyClippingRect, 
			DrawEffects, 
			ScrubColor
			);

		return ArrowLayer;
	}

	return LayerId;
}

int32 SBorder::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const FSlateBrush* BrushResource = BorderImage.Get();
		
	const bool bEnabled = ShouldBeEnabled(bParentEnabled);
	const bool bShowDisabledEffect = ShowDisabledEffect.Get();
	ESlateDrawEffect::Type DrawEffects = bShowDisabledEffect && !bEnabled ? ESlateDrawEffect::DisabledEffect : ESlateDrawEffect::None;

	if ( BrushResource && BrushResource->DrawAs != ESlateBrushDrawType::NoDrawType )
	{
		FSlateDrawElement::MakeBox(
			OutDrawElements,
			LayerId,
			AllottedGeometry.ToPaintGeometry(),
			BrushResource,
			MyClippingRect,
			DrawEffects,
			BrushResource->GetTint( InWidgetStyle ) * InWidgetStyle.GetColorAndOpacityTint() * BorderBackgroundColor.Get().GetColor( InWidgetStyle )
		);
	}

	FWidgetStyle CompoundedWidgetStyle = FWidgetStyle(InWidgetStyle)
		.BlendColorAndOpacityTint(ColorAndOpacity.Get())
		.SetForegroundColor( ForegroundColor.Get() );

	return SCompoundWidget::OnPaint(Args, AllottedGeometry, MyClippingRect.IntersectionWith( AllottedGeometry.GetClippingRect() ), OutDrawElements, LayerId, CompoundedWidgetStyle, bEnabled );
}

int32 SPropertyTableCell::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	if ( CellBackground && CellBackground->DrawAs != ESlateBrushDrawType::NoDrawType )
	{
		const FSlateBrush* Background = CellBackground;

		if ( Cell->GetTable()->GetCurrentCell() == Cell )
		{
			Background = GetCurrentCellBorder();
		}
		else if ( Cell->GetTable()->GetSelectedCells().Contains( Cell.ToSharedRef() ) )
		{
			Background = FEditorStyle::GetBrush( Style, ".ReadOnlySelectedCellBorder" );
		}

		FSlateDrawElement::MakeBox(
			OutDrawElements,
			LayerId,
			AllottedGeometry.ToPaintGeometry(),
			Background,
			MyClippingRect,
			ESlateDrawEffect::None,
			Background->GetTint( InWidgetStyle ) * InWidgetStyle.GetColorAndOpacityTint() 
			);
	}

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

int32 SSpinningImage::OnPaint( const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const FSlateBrush* ImageBrush = Image.Get();

	if ((ImageBrush != NULL) && (ImageBrush->DrawAs != ESlateBrushDrawType::NoDrawType))
	{
		const bool bIsEnabled = ShouldBeEnabled(bParentEnabled);
		const uint32 DrawEffects = bIsEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;

		const FColor FinalColorAndOpacity( InWidgetStyle.GetColorAndOpacityTint() * ColorAndOpacity.Get().GetColor(InWidgetStyle) * ImageBrush->GetTint( InWidgetStyle ) );
		
		const float Angle = Curve.GetLerpLooping() * 2.0f * PI;

		FSlateDrawElement::MakeRotatedBox( 
			OutDrawElements,
			LayerId,
			AllottedGeometry.ToPaintGeometry(),
			ImageBrush,
			MyClippingRect,
			DrawEffects,
			Angle,
			TOptional<FVector2D>(), // Will auto rotate about center
			FSlateDrawElement::RelativeToElement,
			FinalColorAndOpacity
			);
	}
	return LayerId;
}

int32 SCircularThrobber::OnPaint( const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	const FColor FinalColorAndOpacity( InWidgetStyle.GetColorAndOpacityTint() * PieceImage->GetTint( InWidgetStyle ) );
	
	const float Scale = AllottedGeometry.Scale; 
	const float OffsetX = (AllottedGeometry.Size.X * Scale * 0.5f) - (PieceImage->ImageSize.X * Scale * 0.5f);
	const float OffsetY = (AllottedGeometry.Size.Y * Scale * 0.5f) - (PieceImage->ImageSize.Y * Scale * 0.5f);

	FPaintGeometry PaintGeom = AllottedGeometry.ToPaintGeometry();
	FVector2D Origin = PaintGeom.DrawPosition;
	Origin.X += OffsetX;
	Origin.Y += OffsetY;

	const float DeltaAngle = NumPieces > 0 ? 2 * PI / NumPieces : 0;
	const float Phase = Curve.GetLerpLooping() * 2 * PI;

	for (int32 PieceIdx = 0; PieceIdx < NumPieces; ++PieceIdx)
	{
		PaintGeom.DrawPosition.X = Origin.X + FMath::Sin(DeltaAngle * PieceIdx + Phase) * OffsetX;
		PaintGeom.DrawPosition.Y = Origin.Y + FMath::Cos(DeltaAngle * PieceIdx + Phase) * OffsetY;
		PaintGeom.DrawSize = PieceImage->ImageSize * Scale * (PieceIdx + 1) / NumPieces;

		FSlateDrawElement::MakeBox(OutDrawElements, LayerId, PaintGeom, PieceImage, MyClippingRect, ESlateDrawEffect::None, InWidgetStyle.GetColorAndOpacityTint() );
	}
	
	return LayerId;
}

int32 SClippingHorizontalBox::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	// Get the clipped children info
	FArrangedChildren ClippedArrangedChildren(EVisibility::Visible);
	ArrangeChildren(AllottedGeometry, ClippedArrangedChildren);
	
	// Get the non-clipped children info
	// @todo umg: One should not call the virtual OnArrangeChildren, one should only call ArrangeChildren.
	FArrangedChildren ArrangedChildren(EVisibility::Visible);
	SBoxPanel::OnArrangeChildren(AllottedGeometry, ArrangedChildren);
	
	if ((ClippedArrangedChildren.Num() != 0) && (ArrangedChildren.Num() != 0))
	{
		int32 IndexClippedAt = ClippedArrangedChildren.Num() - 1;
		const FArrangedWidget& LastCippedChild = ClippedArrangedChildren[IndexClippedAt];
		const FArrangedWidget& FirstChild = ArrangedChildren[0];
		const FArrangedWidget& LastChild = ArrangedChildren[ArrangedChildren.Num() - 1];
		float BorderLocalWidth = AllottedGeometry.Size.X;
	
		// If only the last child/block, which is the wrap button, is being clipped
		if (IndexClippedAt == ArrangedChildren.Num() - 2)
		{
			// Only recalculate the alloted geometry size if said size is fitted to the toolbar/menubar
			if (FMath::TruncToInt(AllottedGeometry.AbsolutePosition.X + AllottedGeometry.Size.X * AllottedGeometry.Scale) <= FMath::TruncToInt(LastChild.Geometry.AbsolutePosition.X + LastChild.Geometry.Size.X * LastChild.Geometry.Scale))
			{
				// Calculate the size of the custom border
				BorderLocalWidth = (LastCippedChild.Geometry.AbsolutePosition.X + LastCippedChild.Geometry.Size.X * LastCippedChild.Geometry.Scale - FirstChild.Geometry.AbsolutePosition.X) / AllottedGeometry.Scale;
			}
		}
		else
		{
			// Children/blocks are being clipped, calculate the size of the custom border
			const FArrangedWidget& NextChild = (IndexClippedAt + 1 < ClippedArrangedChildren.Num())? ClippedArrangedChildren[IndexClippedAt + 1]: LastCippedChild;
			BorderLocalWidth = (NextChild.Geometry.AbsolutePosition.X + NextChild.Geometry.Size.X * NextChild.Geometry.Scale - FirstChild.Geometry.AbsolutePosition.X) / AllottedGeometry.Scale;
		}
	
		bool bEnabled = ShouldBeEnabled( bParentEnabled );
		ESlateDrawEffect::Type DrawEffects = !bEnabled ? ESlateDrawEffect::DisabledEffect : ESlateDrawEffect::None;
		FSlateColor BorderBackgroundColor = FLinearColor::White;

		// Draw the custom border
		FSlateDrawElement::MakeBox(
			OutDrawElements,
			LayerId,
			AllottedGeometry.ToPaintGeometry(FVector2D(BorderLocalWidth, AllottedGeometry.Size.Y), FSlateLayoutTransform()),
			BackgroundBrush,
			MyClippingRect,
			DrawEffects,
			BackgroundBrush->GetTint( InWidgetStyle ) * InWidgetStyle.GetColorAndOpacityTint() * BorderBackgroundColor.GetColor(InWidgetStyle)
			);
	}

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

int32 SGraphBar::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
	// Used to track the layer ID we will return.
	int32 RetLayerId = LayerId;

	bool bEnabled = ShouldBeEnabled( bParentEnabled );
	const ESlateDrawEffect::Type DrawEffects = bEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;
		
	const FLinearColor ColorAndOpacitySRGB = InWidgetStyle.GetColorAndOpacityTint();
	static const FLinearColor SelectedBarColor(FLinearColor::White);

	// Paint inside the border only. 
	const FVector2D BorderPadding = FTaskGraphStyle::Get()->GetVector("TaskGraph.ProgressBar.BorderPadding");
	const FSlateRect ForegroundClippingRect = AllottedGeometry.GetClippingRect().InsetBy(FMargin(BorderPadding.X, BorderPadding.Y)).IntersectionWith(MyClippingRect);

	FSlateDrawElement::MakeBox(
		OutDrawElements,
		RetLayerId++,
		AllottedGeometry.ToPaintGeometry(),
		BackgroundImage,
		MyClippingRect,
		DrawEffects,
		ColorAndOpacitySRGB
	);	
	
	// Draw all bars
	for( int32 EventIndex = 0; EventIndex < Events.Num(); ++EventIndex )
	{
		TSharedPtr< FVisualizerEvent > Event = Events[ EventIndex ];
		float StartX, EndX;
		if( CalculateEventGeometry( Event.Get(), AllottedGeometry, StartX, EndX ) )
		{
			// Draw Event bar
			FSlateDrawElement::MakeBox(
				OutDrawElements,
				RetLayerId++,
				AllottedGeometry.ToPaintGeometry(
					FVector2D( StartX, 0.0f ),
					FVector2D( EndX - StartX, AllottedGeometry.Size.Y )),
				Event->IsSelected ? SelectedImage : FillImage,
				ForegroundClippingRect,
				DrawEffects,
				Event->IsSelected ? SelectedBarColor : ColorPalette[Event->ColorIndex % (sizeof(ColorPalette) / sizeof(ColorPalette[0]))]			
				);
		}
	}

	return RetLayerId - 1;
}

int32 FSlateSimpleRunHighlighter::OnPaint( const FTextLayout::FLineView& Line, const TSharedRef< ISlateRun >& Run, const TSharedRef< ILayoutBlock >& Block, const FTextBlockStyle& DefaultStyle, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const 
{
	FVector2D Location( Block->GetLocationOffset() );
	Location.Y = Line.Offset.Y;

	// Draw the actual highlight rectangle
	FSlateDrawElement::MakeBox(
		OutDrawElements,
		++LayerId,
		FPaintGeometry( AllottedGeometry.AbsolutePosition + Location, FVector2D( Block->GetSize().X, Line.Size.Y ), AllottedGeometry.Scale ),
		&DefaultStyle.HighlightShape,
		MyClippingRect,
		bParentEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect,
		InWidgetStyle.GetColorAndOpacityTint() * DefaultStyle.HighlightColor
		);

	FLinearColor InvertedForeground = FLinearColor::White - InWidgetStyle.GetForegroundColor();
	InvertedForeground.A = InWidgetStyle.GetForegroundColor().A;

	FWidgetStyle WidgetStyle( InWidgetStyle );
	WidgetStyle.SetForegroundColor( InvertedForeground );

	return Run->OnPaint( Line, Block, DefaultStyle, AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, WidgetStyle, bParentEnabled );
}

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

	if (bVisible)
	{
		FLinearColor ColorAndOpacitySRGB = InWidgetStyle.GetColorAndOpacityTint();
		ColorAndOpacitySRGB.A = FMath::RoundToInt(255.f * CurrentOpacity);

		for (int32 ControlIndex = 0; ControlIndex < Controls.Num(); ControlIndex++)
		{
			const FControlInfo& Control = Controls[ControlIndex];

			if (Control.Image2.IsValid())
			{
				FSlateDrawElement::MakeBox(
					OutDrawElements,
					RetLayerId++,
					AllottedGeometry.ToPaintGeometry(
					Control.VisualCenter - FVector2D(Control.CorrectedVisualSize.X * 0.5f, Control.CorrectedVisualSize.Y * 0.5f),
					Control.CorrectedVisualSize),
					Control.Image2.Get(),
					MyClippingRect,
					ESlateDrawEffect::None,
					ColorAndOpacitySRGB
					);
			}

			if (Control.Image1.IsValid())
			{
				FSlateDrawElement::MakeBox(
					OutDrawElements,
					RetLayerId++,
					AllottedGeometry.ToPaintGeometry(
					Control.VisualCenter + Control.ThumbPosition - FVector2D(Control.CorrectedThumbSize.X * 0.5f, Control.CorrectedThumbSize.Y * 0.5f),
					Control.CorrectedThumbSize),
					Control.Image1.Get(),
					MyClippingRect,
					ESlateDrawEffect::None,
					ColorAndOpacitySRGB
					);
			}
		}
	}
	
	return RetLayerId;
}

int32 SImage::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
#if SLATE_HD_STATS
	SCOPE_CYCLE_COUNTER( STAT_SlateOnPaint_SImage );
#endif
	const FSlateBrush* ImageBrush = Image.Get();

	if ((ImageBrush != nullptr) && (ImageBrush->DrawAs != ESlateBrushDrawType::NoDrawType))
	{
		const bool bIsEnabled = ShouldBeEnabled(bParentEnabled);
		const uint32 DrawEffects = bIsEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;

		const FColor FinalColorAndOpacity( InWidgetStyle.GetColorAndOpacityTint() * ColorAndOpacity.Get().GetColor(InWidgetStyle) * ImageBrush->GetTint( InWidgetStyle ) );

		FSlateDrawElement::MakeBox(OutDrawElements, LayerId, AllottedGeometry.ToPaintGeometry(), ImageBrush, MyClippingRect, DrawEffects, FinalColorAndOpacity );
	}
	return LayerId;
}