Struct ScrollLink 

pub struct ScrollLink { /* private fields */ }

Turns scroll progress into an Effect: opacity, movement and scale.

Pick a ScrollRange, narrow it to a window with Self::between, shape it with an Easing, and describe the effect with keyframes or any function. Presets cover the usual entrances and exits.

Implementations

impl ScrollLink

pub fn custom(map: impl Fn(f32) -> Effect + 'static) -> ScrollLink

The effect is map(t), where t runs from 0 to 1 over the window, after easing.

pub fn keyframes(stops: impl IntoIterator<Item = (f32, Effect)>) -> ScrollLink

Interpolates between effects at given points of the window, like CSS keyframes. Before the first stop the first effect holds, after the last the last one does. No stops is no effect.

pub fn fade_in() -> ScrollLink

Fades in and rises 24 pixels into place.

pub fn fade_out() -> ScrollLink

Fades out and lifts 24 pixels away.

pub fn parallax(distance: f32) -> ScrollLink

Moves distance pixels down over the window: a negative distance moves it up. Slower than the scroll, it reads as depth.

pub fn grow_from(from: f32) -> ScrollLink

Grows from from to full size.

pub fn range(self, range: ScrollRange) -> ScrollLink

Measures this range instead of the default ScrollRange::Scene.

pub fn between(self, from: f32, to: f32) -> ScrollLink

Plays the whole effect inside this part of the range, 0.0..=1.0: before from it shows its start, after to its end. Scenes use it to give each step its turn.

pub fn easing(self, easing: Easing) -> ScrollLink

Shapes the progress inside the window (linear by default).

pub fn scroll_range(&self) -> ScrollRange

The range this link measures.

pub fn effect_at(&self, progress: f32) -> Effect

The effect at progress along the range, from 0 to 1.

Trait Implementations

impl Clone for ScrollLink

fn clone(&self) -> ScrollLink

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScrollLink

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.