Add a presets Menu to the game_of_life example

examples/game_of_life/src/preset.rs

@@ -1,3 +1,5 @@
+use iced::menu::{self, Menu};
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Preset {
     Custom,
@@ -26,6 +28,17 @@ pub static ALL: &[Preset] = &[
 ];
 
 impl Preset {
+    pub fn menu() -> Menu<Self> {
+        Menu::with_entries(
+            ALL.iter()
+                .copied()
+                .map(|preset| {
+                    menu::Entry::item(preset.to_string(), None, preset)
+                })
+                .collect(),
+        )
+    }
+
     pub fn life(self) -> Vec<(isize, isize)> {
         #[rustfmt::skip]
         let cells = match self {