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;
}
