Implement iced::Sandbox trait for simple apps

src/sandbox.rs

@@ -0,0 +1,45 @@
+use crate::{Application, Command, Element};
+
+pub trait Sandbox {
+    type Message: std::fmt::Debug + Send;
+
+    fn new() -> Self;
+
+    fn title(&self) -> String;
+
+    fn update(&mut self, message: Self::Message);
+
+    fn view(&mut self) -> Element<Self::Message>;
+
+    fn run()
+    where
+        Self: 'static + Sized,
+    {
+        <Self as Application>::run()
+    }
+}
+
+impl<T> Application for T
+where
+    T: Sandbox,
+{
+    type Message = T::Message;
+
+    fn new() -> (Self, Command<T::Message>) {
+        (T::new(), Command::none())
+    }
+
+    fn title(&self) -> String {
+        T::title(self)
+    }
+
+    fn update(&mut self, message: T::Message) -> Command<T::Message> {
+        T::update(self, message);
+
+        Command::none()
+    }
+
+    fn view(&mut self) -> Element<T::Message> {
+        T::view(self)
+    }
+}