C++ (Cpp) FGeometry::ToInflatedPaintGeometry Examples

Example #1

File: SProgressBar.cpp Project: Tigrouzen/UnrealEngine-4

int32 SProgressBar::OnPaint( 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 FColor FillColorAndOpacitySRGB( InWidgetStyle.GetColorAndOpacityTint() * FillColorAndOpacity.Get().GetColor(InWidgetStyle) * FillImage->GetTint( InWidgetStyle ) );
    const FColor ColorAndOpacitySRGB = InWidgetStyle.GetColorAndOpacityTint();

    TOptional<float> ProgressFraction = Percent.Get();

    // Paint inside the border only.
    FPaintGeometry ForegroundPaintGeometry = AllottedGeometry.ToInflatedPaintGeometry( -BorderPadding.Get() );
    const FSlateRect ForegroundClippingRect = ForegroundPaintGeometry.ToSlateRect().IntersectionWith( MyClippingRect );

    FSlateDrawElement::MakeBox(
        OutDrawElements,
        RetLayerId++,
        AllottedGeometry.ToPaintGeometry(),
        BackgroundImage,
        MyClippingRect,
        DrawEffects,
        InWidgetStyle.GetColorAndOpacityTint() * BackgroundImage->GetTint( InWidgetStyle )
    );

    if( ProgressFraction.IsSet() )
    {
        const float ClampedFraction = FMath::Clamp( ProgressFraction.GetValue(), 0.0f, 1.0f  );

        // Draw Fill
        FSlateDrawElement::MakeBox(
            OutDrawElements,
            RetLayerId++,
            AllottedGeometry.ToPaintGeometry(
                FVector2D::ZeroVector,
                FVector2D( AllottedGeometry.Size.X * ( ClampedFraction ) , AllottedGeometry.Size.Y )),
            FillImage,
            ForegroundClippingRect,
            DrawEffects,
            FillColorAndOpacitySRGB
        );

    }
    else
    {
        // Draw Marquee
        const float MarqueeAnimOffset = MarqueeImage->ImageSize.X * CurveSequence.GetLerpLooping();
        const float MarqueeImageSize = MarqueeImage->ImageSize.X;

        FSlateDrawElement::MakeBox(
            OutDrawElements,
            RetLayerId++,
            AllottedGeometry.ToPaintGeometry(
                FVector2D( MarqueeAnimOffset - MarqueeImageSize, 0.0f ),
                FVector2D( AllottedGeometry.Size.X + MarqueeImageSize, AllottedGeometry.Size.Y )),
            MarqueeImage,
            ForegroundClippingRect,
            DrawEffects,
            ColorAndOpacitySRGB
        );

    }

    return RetLayerId - 1;
}