Added basic layout

Signed-off-by: Louis Hollingworth <louis@hollingworth.nl>

src/main.rs

@@ -1,14 +1,43 @@
 #[derive(Default)]
-struct App {}
+struct App {
+    current_screen: Screen,
+}
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
-enum Message {}
+enum Message {
+    ChangeScreen(Screen),
+}
+
+#[derive(Debug, Default, Clone, Copy)]
+enum Screen {
+    #[default]
+    Home,
+    Search,
+}
 
 impl App {
-    fn update(&mut self, message: Message) {}
+    fn update(&mut self, message: Message) {
+        match message {
+            Message::ChangeScreen(s) => self.current_screen = s,
+        }
+    }
     fn view(&self) -> iced::Element<'_, Message> {
-        let content = iced::widget::column!["Saluton, Mondo!"];
+        let side_bar = iced::widget::column![
-        content.into()
+            iced::widget::button("Home")
+                .on_press(Message::ChangeScreen(Screen::Home))
+                .width(iced::Length::Fixed(100.0)),
+            iced::widget::button("Search")
+                .on_press(Message::ChangeScreen(Screen::Search))
+                .width(iced::Length::Fixed(100.0))
+        ];
+        let screen = match self.current_screen {
+            Screen::Home => "Home",
+            Screen::Search => "Search",
+        };
+        let content = iced::widget::column!["You are at:", screen];
+        let page = iced::widget::row![side_bar, content].spacing(20);
+
+        iced::widget::container(page).into()
     }
 }