Merge pull request #62 from hecrj/feature/async-actions

Async actions

1 files changed, 15 insertions, 7 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 52b0ff8c..945af421 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,21 +4,23 @@ mod platform;
 
 pub use platform::*;
 
-pub trait Application {
-    type Message: std::fmt::Debug;
+pub trait Application: Sized {
+    type Message: std::fmt::Debug + Send;
+
+    fn new() -> (Self, Command<Self::Message>);
 
     fn title(&self) -> String;
 
-    fn update(&mut self, message: Self::Message);
+    fn update(&mut self, message: Self::Message) -> Command<Self::Message>;
 
     fn view(&mut self) -> Element<Self::Message>;
 
-    fn run(self)
+    fn run()
     where
         Self: 'static + Sized,
     {
         #[cfg(not(target_arch = "wasm32"))]
-        iced_winit::Application::run(Instance(self));
+        <Instance<Self> as iced_winit::Application>::run();
 
         #[cfg(target_arch = "wasm32")]
         iced_web::Application::run(Instance(self));
@@ -35,12 +37,18 @@ where
     type Renderer = Renderer;
     type Message = A::Message;
 
+    fn new() -> (Self, Command<A::Message>) {
+        let (app, command) = A::new();
+
+        (Instance(app), command)
+    }
+
     fn title(&self) -> String {
         self.0.title()
     }
 
-    fn update(&mut self, message: Self::Message) {
-        self.0.update(message);
+    fn update(&mut self, message: Self::Message) -> Command<Self::Message> {
+        self.0.update(message)
     }
 
     fn view(&mut self) -> Element<Self::Message> {