fonts and glowup

src/utils.rs

@@ -1,6 +1,12 @@
 use crate::Polygon;
 use iced::Color;
 use kira::sound::static_sound::StaticSoundData;
+use regex::Regex;
+
+pub fn is_delta_format_valid(str: &str) -> bool {
+    let re = Regex::new(r"^\d{1,2}:\d{1,2}:\d{1,2}$").unwrap();
+    re.is_match(str)
+}
 pub fn string_to_color<S: AsRef<str>>(s: S) -> Color {
     match s.as_ref() {
         "Green" => Color::from_rgb(0.0, 1.0, 0.0),