anim/core/animation/
scale.rs

1// anim
2//
3// A framework independent animation library for rust, works nicely with Iced and the others
4// Copyright: 2021, Joylei <leingliu@gmail.com>
5// License: MIT
6
7use super::{Animation, BaseAnimation};
8use crate::core::DURATION_ZERO;
9use std::time::Duration;
10/// repeat animations
11#[derive(Debug, Clone)]
12pub struct Scale<T: Animation> {
13    src: T,
14    scale: f32,
15}
16
17impl<T: Animation> Scale<T> {
18    #[inline]
19    pub(super) fn new(src: T, scale: f32) -> Self {
20        assert!(scale >= 0.0);
21        Self { src, scale }
22    }
23}
24
25impl<T: Animation> BaseAnimation for Scale<T> {
26    type Item = T::Item;
27    #[inline]
28    fn duration(&self) -> Option<Duration> {
29        self.src.duration().map(|duration| {
30            if duration == DURATION_ZERO || self.scale == 0.0 {
31                return DURATION_ZERO;
32            }
33            duration.div_f32(self.scale)
34        })
35    }
36
37    #[inline]
38    fn animate(&self, elapsed: Duration) -> Self::Item {
39        if self.scale == 0.0 {
40            return self.src.animate(DURATION_ZERO);
41        }
42        let elapsed = elapsed.div_f32(self.scale);
43        self.src.animate(elapsed)
44    }
45}
anim/core/animation/scale.rs

anim/core/animation/
scale.rs
