Introduce `Program` API

1 files changed, 21 insertions, 37 deletions

diff --git a/examples/geometry/src/main.rs b/examples/geometry/src/main.rs
index 1ccc4dd6..52c10c33 100644
--- a/examples/geometry/src/main.rs
+++ b/examples/geometry/src/main.rs
@@ -147,51 +147,35 @@ mod rainbow {
 }
 
 use iced::widget::{column, container, scrollable};
-use iced::{Element, Length, Sandbox, Settings};
+use iced::{Element, Length};
 use rainbow::rainbow;
 
 pub fn main() -> iced::Result {
-    Example::run(Settings::default())
+    iced::run("Custom 2D Geometry - Iced", |_, _| {}, view)
 }
 
-struct Example;
-
-impl Sandbox for Example {
-    type Message = ();
-
-    fn new() -> Self {
-        Self
-    }
-
-    fn title(&self) -> String {
-        String::from("Custom 2D geometry - Iced")
-    }
-
-    fn update(&mut self, _: ()) {}
-
-    fn view(&self) -> Element<()> {
-        let content = column![
-            rainbow(),
-            "In this example we draw a custom widget Rainbow, using \
+fn view(_state: &()) -> Element<'_, ()> {
+    let content = column![
+        rainbow(),
+        "In this example we draw a custom widget Rainbow, using \
                  the Mesh2D primitive. This primitive supplies a list of \
                  triangles, expressed as vertices and indices.",
-            "Move your cursor over it, and see the center vertex \
+        "Move your cursor over it, and see the center vertex \
                  follow you!",
-            "Every Vertex2D defines its own color. You could use the \
+        "Every Vertex2D defines its own color. You could use the \
                  Mesh2D primitive to render virtually any two-dimensional \
                  geometry for your widget.",
-        ]
-        .padding(20)
-        .spacing(20)
-        .max_width(500);
-
-        let scrollable =
-            scrollable(container(content).width(Length::Fill).center_x());
-
-        container(scrollable)
-            .width(Length::Fill)
-            .height(Length::Fill)
-            .center_y()
-            .into()
-    }
+    ]
+    .padding(20)
+    .spacing(20)
+    .max_width(500);
+
+    let scrollable =
+        scrollable(container(content).width(Length::Fill).center_x());
+
+    container(scrollable)
+        .width(Length::Fill)
+        .height(Length::Fill)
+        .center_y()
+        .into()
 }