Draft time-travel debugging feature

examples/multitouch/src/main.rs

@@ -23,7 +23,7 @@ struct Multitouch {
     fingers: HashMap<touch::Finger, Point>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 enum Message {
     FingerPressed { id: touch::Finger, position: Point },
     FingerLifted { id: touch::Finger },

examples/solar_system/src/main.rs

@@ -105,6 +105,10 @@ impl State {
     }
 
     pub fn update(&mut self, now: Instant) {
+        if self.start > now {
+            self.start = now;
+        }
+
         self.now = now;
         self.system_cache.clear();
     }

examples/todos/Cargo.toml

@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 iced.workspace = true
-iced.features = ["tokio", "debug"]
+iced.features = ["tokio", "debug", "time-travel"]
 
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"