Introduce Program API

examples/loading_spinners/src/main.rs

@@ -1,6 +1,5 @@
-use iced::executor;
 use iced::widget::{column, container, row, slider, text};
-use iced::{Application, Command, Element, Length, Settings, Theme};
+use iced::{Element, Length};
 
 use std::time::Duration;
 
@@ -12,51 +11,28 @@ use circular::Circular;
 use linear::Linear;
 
 pub fn main() -> iced::Result {
-    LoadingSpinners::run(Settings {
-        antialiasing: true,
-        ..Default::default()
-    })
+    iced::sandbox(LoadingSpinners::update, LoadingSpinners::view)
+        .title("Loading Spinners - Iced")
+        .antialiased()
+        .run()
 }
 
 struct LoadingSpinners {
     cycle_duration: f32,
 }
 
-impl Default for LoadingSpinners {
-    fn default() -> Self {
-        Self {
-            cycle_duration: 2.0,
-        }
-    }
-}
-
 #[derive(Debug, Clone, Copy)]
 enum Message {
     CycleDurationChanged(f32),
 }
 
-impl Application for LoadingSpinners {
-    type Message = Message;
-    type Flags = ();
-    type Executor = executor::Default;
-    type Theme = Theme;
-
-    fn new(_flags: Self::Flags) -> (Self, Command<Message>) {
-        (Self::default(), Command::none())
-    }
-
-    fn title(&self) -> String {
-        String::from("Loading Spinners - Iced")
-    }
-
-    fn update(&mut self, message: Message) -> Command<Message> {
+impl LoadingSpinners {
+    fn update(&mut self, message: Message) {
         match message {
             Message::CycleDurationChanged(duration) => {
                 self.cycle_duration = duration;
             }
         }
-
-        Command::none()
     }
 
     fn view(&self) -> Element<Message> {
@@ -115,3 +91,11 @@ impl Application for LoadingSpinners {
         .into()
     }
 }
+
+impl Default for LoadingSpinners {
+    fn default() -> Self {
+        Self {
+            cycle_duration: 2.0,
+        }
+    }
+}