Trait style::values::animated::ToAnimatedZero

pub trait ToAnimatedZero: Sized {
    fn to_animated_zero(&self) -> Result<Self, ()>;
}

Returns a value similar to self that represents zero.

This trait is derivable with #[derive(ToAnimatedValue)]. If a field is annotated with #[animation(constant)], a clone of its value will be used instead of calling ToAnimatedZero::to_animated_zero on it.

If a variant is annotated with #[animation(error)], the corresponding match arm is not generated.

Required Methods

fn to_animated_zero(&self) -> Result<Self, ()>

Returns a value that, when added with an underlying value, will produce the underlying value. This is used for SMIL animation's "by-animation" where SMIL first interpolates from the zero value to the 'by' value, and then adds the result to the underlying value.

This is not the necessarily the same as the initial value of a property. For example, the initial value of 'stroke-width' is 1, but the zero value is 0, since adding 1 to the underlying value will not produce the underlying value.

Implementations on Foreign Types

impl ToAnimatedZero for f32

fn to_animated_zero(&self) -> Result<Self, ()>

impl ToAnimatedZero for f64

fn to_animated_zero(&self) -> Result<Self, ()>

impl ToAnimatedZero for i32

fn to_animated_zero(&self) -> Result<Self, ()>

impl<T> ToAnimatedZero for Option<T> where
    T: ToAnimatedZero, 

fn to_animated_zero(&self) -> Result<Self, ()>

Implementors

• impl ToAnimatedZero for RGBA
• impl ToAnimatedZero for Color
• impl<S> ToAnimatedZero for ShadowList<S>
• impl ToAnimatedZero for FilterList
• impl ToAnimatedZero for Au
• impl ToAnimatedZero for Angle
• impl ToAnimatedZero for BackgroundSize
• impl ToAnimatedZero for BorderSpacing
• impl ToAnimatedZero for BorderCornerRadius
• impl ToAnimatedZero for FontSize
• impl ToAnimatedZero for KeywordInfo
• impl ToAnimatedZero for FontSizeAdjust
• impl ToAnimatedZero for CalcLengthOrPercentage
• impl ToAnimatedZero for LengthOrPercentage
• impl ToAnimatedZero for CSSPixelLength
• impl ToAnimatedZero for MozLength
• impl ToAnimatedZero for Percentage
• impl ToAnimatedZero for LineHeight
• impl ToAnimatedZero for TransformOperation
• impl ToAnimatedZero for Transform
• impl<B, T, U> ToAnimatedZero for ShapeSource<B, T, U>
• impl<L> ToAnimatedZero for VerticalAlign<L>
• impl<Color, SizeLength, BlurShapeLength, ShapeLength> ToAnimatedZero for BoxShadow<Color, SizeLength, BlurShapeLength, ShapeLength> where
    SimpleShadow<Color, SizeLength, BlurShapeLength>: ToAnimatedZero,
    ShapeLength: ToAnimatedZero, 
• impl<Color, SizeLength, ShapeLength> ToAnimatedZero for SimpleShadow<Color, SizeLength, ShapeLength> where
    Color: ToAnimatedZero,
    SizeLength: ToAnimatedZero,
    ShapeLength: ToAnimatedZero, 
• impl<H, V> ToAnimatedZero for Position<H, V> where
    H: ToAnimatedZero,
    V: ToAnimatedZero, 
• impl<ColorType, UrlPaintServer> ToAnimatedZero for SVGPaintKind<ColorType, UrlPaintServer> where
    ColorType: ToAnimatedZero, 
• impl<LengthOrPercentage, Number> ToAnimatedZero for SvgLengthOrPercentageOrNumber<LengthOrPercentage, Number> where
    LengthOrPercentage: ToAnimatedZero,
    Number: ToAnimatedZero, 
• impl<LengthType> ToAnimatedZero for SVGLength<LengthType> where
    LengthType: ToAnimatedZero, 
• impl<OpacityType> ToAnimatedZero for SVGOpacity<OpacityType> where
    OpacityType: ToAnimatedZero, 
• impl<V> ToAnimatedZero for Spacing<V> where
    V: From<Au>, 
• impl<H, V, Depth> ToAnimatedZero for TransformOrigin<H, V, Depth> where
    H: ToAnimatedZero,
    V: ToAnimatedZero,
    Depth: ToAnimatedZero, 
• impl<T> ToAnimatedZero for NonNegative<T> where
    T: ToAnimatedZero, 
• impl<T> ToAnimatedZero for GreaterThanOrEqualToOne<T> where
    T: ToAnimatedZero, 
• impl ToAnimatedZero for KeywordSize
• impl ToAnimatedZero for None_
• impl ToAnimatedZero for Auto
• impl ToAnimatedZero for Normal
• impl<A, B> ToAnimatedZero for Either<A, B> where
    A: ToAnimatedZero,
    B: ToAnimatedZero, 
• impl ToAnimatedZero for style::properties::longhands::background_position_x::computed_value::T
• impl ToAnimatedZero for style::properties::longhands::background_position_y::computed_value::T
• impl ToAnimatedZero for style::properties::longhands::background_size::computed_value::T
• impl ToAnimatedZero for AnimationValue
• impl ToAnimatedZero for Visibility
• impl ToAnimatedZero for LengthOrPercentageOrAuto
• impl ToAnimatedZero for LengthOrPercentageOrNone
• impl ToAnimatedZero for MaxLength
• impl ToAnimatedZero for FontWeight
• impl ToAnimatedZero for FontStretch
• impl ToAnimatedZero for ClipRect
• impl ToAnimatedZero for IntermediateSVGPaint
• impl<L> ToAnimatedZero for SVGStrokeDashArray<L> where
    L: ToAnimatedZero, 
• impl ToAnimatedZero for AnimatedFilter