event loop: Decouple event timeout from event type

src/state.rs

@@ -7,6 +7,7 @@
 
 use crate::animation;
 use crate::debug;
+use crate::event_loop;
 use crate::imservice::{ ContentHint, ContentPurpose };
 use crate::layout::ArrangementKind;
 use crate::main;
@@ -80,6 +81,15 @@ pub enum Event {
     TimeoutReached(Instant),
 }
 
+impl event_loop::Event for Event {
+    fn get_timeout_reached(&self) -> Option<Instant> {
+        match self {
+            Self::TimeoutReached(when) => Some(*when),
+            _ => None,
+        }
+    }
+}
+
 impl From<InputMethod> for Event {
     fn from(im: InputMethod) -> Self {
         Self::InputMethod(im)