Support async actions in iced_winit

examples/scroll.rs

@@ -1,12 +1,12 @@
 use iced::{
-    button, scrollable, Align, Application, Button, Container, Element, Image,
-    Length, Scrollable, Text,
+    button, scrollable, Align, Application, Button, Command, Container,
+    Element, Image, Length, Scrollable, Text,
 };
 
 pub fn main() {
     env_logger::init();
 
-    Example::default().run()
+    Example::run()
 }
 
 #[derive(Default)]
@@ -25,16 +25,22 @@ pub enum Message {
 impl Application for Example {
     type Message = Message;
 
+    fn new() -> (Example, Command<Message>) {
+        (Example::default(), Command::none())
+    }
+
     fn title(&self) -> String {
         String::from("Scroll - Iced")
     }
 
-    fn update(&mut self, message: Message) {
+    fn update(&mut self, message: Message) -> Command<Message> {
         match message {
             Message::AddItem => {
                 self.item_count += 1;
             }
         }
+
+        Command::none()
     }
 
     fn view(&mut self) -> Element<Message> {

examples/todos.rs

@@ -1,11 +1,11 @@
 use iced::{
     button, scrollable, text::HorizontalAlignment, text_input, Align,
-    Application, Background, Button, Checkbox, Color, Column, Container,
-    Element, Font, Length, Row, Scrollable, Text, TextInput,
+    Application, Background, Button, Checkbox, Color, Column, Command,
+    Container, Element, Font, Length, Row, Scrollable, Text, TextInput,
 };
 
 pub fn main() {
-    Todos::default().run()
+    Todos::run()
 }
 
 #[derive(Debug, Default)]
@@ -29,11 +29,15 @@ pub enum Message {
 impl Application for Todos {
     type Message = Message;
 
+    fn new() -> (Todos, Command<Message>) {
+        (Todos::default(), Command::none())
+    }
+
     fn title(&self) -> String {
         String::from("Todos - Iced")
     }
 
-    fn update(&mut self, message: Message) {
+    fn update(&mut self, message: Message) -> Command<Message> {
         match message {
             Message::InputChanged(value) => {
                 self.input_value = value;
@@ -58,6 +62,8 @@ impl Application for Todos {
         }
 
         dbg!(self);
+
+        Command::none()
     }
 
     fn view(&mut self) -> Element<Message> {

examples/tour.rs

@@ -1,13 +1,14 @@
 use iced::{
     button, scrollable, slider, text::HorizontalAlignment, text_input,
-    Application, Background, Button, Checkbox, Color, Column, Container,
-    Element, Image, Length, Radio, Row, Scrollable, Slider, Text, TextInput,
+    Application, Background, Button, Checkbox, Color, Column, Command,
+    Container, Element, Image, Length, Radio, Row, Scrollable, Slider, Text,
+    TextInput,
 };
 
 pub fn main() {
     env_logger::init();
 
-    Tour::new().run()
+    Tour::run()
 }
 
 pub struct Tour {
@@ -18,26 +19,27 @@ pub struct Tour {
     debug: bool,
 }
 
-impl Tour {
-    pub fn new() -> Tour {
-        Tour {
-            steps: Steps::new(),
-            scroll: scrollable::State::new(),
-            back_button: button::State::new(),
-            next_button: button::State::new(),
-            debug: true,
-        }
-    }
-}
-
 impl Application for Tour {
     type Message = Message;
 
+    fn new() -> (Tour, Command<Message>) {
+        (
+            Tour {
+                steps: Steps::new(),
+                scroll: scrollable::State::new(),
+                back_button: button::State::new(),
+                next_button: button::State::new(),
+                debug: true,
+            },
+            Command::none(),
+        )
+    }
+
     fn title(&self) -> String {
         format!("{} - Iced", self.steps.title())
     }
 
-    fn update(&mut self, event: Message) {
+    fn update(&mut self, event: Message) -> Command<Message> {
         match event {
             Message::BackPressed => {
                 self.steps.go_back();
@@ -49,6 +51,8 @@ impl Application for Tour {
                 self.steps.update(step_msg, &mut self.debug);
             }
         }
+
+        Command::none()
     }
 
     fn view(&mut self) -> Element<Message> {