Introduce Program API

examples/combo_box/src/main.rs

@@ -1,10 +1,10 @@
 use iced::widget::{
     column, combo_box, container, scrollable, text, vertical_space,
 };
-use iced::{Alignment, Element, Length, Sandbox, Settings};
+use iced::{Alignment, Element, Length};
 
 pub fn main() -> iced::Result {
-    Example::run(Settings::default())
+    iced::run("Combo Box - Iced", Example::update, Example::view)
 }
 
 struct Example {
@@ -20,9 +20,7 @@ enum Message {
     Closed,
 }
 
-impl Sandbox for Example {
-    type Message = Message;
-
+impl Example {
     fn new() -> Self {
         Self {
             languages: combo_box::State::new(Language::ALL.to_vec()),
@@ -31,10 +29,6 @@ impl Sandbox for Example {
         }
     }
 
-    fn title(&self) -> String {
-        String::from("Combo box - Iced")
-    }
-
     fn update(&mut self, message: Message) {
         match message {
             Message::Selected(language) => {
@@ -83,6 +77,12 @@ impl Sandbox for Example {
     }
 }
 
+impl Default for Example {
+    fn default() -> Self {
+        Example::new()
+    }
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
 pub enum Language {
     Danish,