trezor-firmware/core/embed/rust/src/ui/demo/anim_timer.rs

use crate::time;

pub struct AnimTimer {
    base: Option<time::Instant>,
    limit: Option<time::Duration>,
}

impl AnimTimer {
    pub fn new() -> Self {
        Self {
            base: None,
            limit: None,
        }
    }

    pub fn reset(&mut self) {
        self.base = None;
    }

    pub fn start(&mut self) {
        self.base = Some(time::Instant::now());
    }

    pub fn stop(&mut self) {
        self.base = None;
    }

    pub fn is_running(&self) -> bool {
        self.base.is_some()
    }

    pub fn elapsed(&self) -> f32 {
        if let Some(t) = self.base {
            time::Instant::now()
                .checked_duration_since(t)
                .unwrap()
                .to_millis() as f32
                / 1000.0
        } else {
            0.0
        }
    }
}