Smol, last-minute fixes.

src/slide/s2_introduction.rs

@@ -2,42 +2,26 @@
 use crate::fade_in::fade_in;
 use crate::slide::Slide;
 use eframe::egui::style::Margin;
-use eframe::egui::{Context, Frame, Ui};
+use eframe::egui::{Context, Frame, TextStyle, Ui};
 
 /// A slide that sets some expectations about generative art.
 #[derive(Default)]
 #[allow(unused)]
 pub struct Introduction {
-    state: IntroductionState,
-}
-
-#[allow(unused)]
-#[derive(Default)]
-enum IntroductionState {
-    #[default]
-    Weaknesses,
-    Strengths {
-        /// What time we started fading in the strengths.
-        transition_time: f64,
-    },
+    fade_starts: [Option<f64>; 3],
 }
 
 impl Slide for Introduction {
     #[rustfmt::skip]
     #[allow(unused)]
     fn transition(&mut self, ctx: &Context) -> bool {
-        true
-        /*
-        match self.state {
-            IntroductionState::Weaknesses => {
-                self.state = IntroductionState::Strengths {
-                    transition_time: ctx.input().time,
-                };
-                false
+        for fade_start in &mut self.fade_starts {
+            if fade_start.is_none() {
+                *fade_start = Some(ctx.input().time);
+                return false;
             }
-            IntroductionState::Strengths { .. } => true,
         }
-         */
+        true
     }
 
     #[rustfmt::skip]
@@ -45,24 +29,24 @@ impl Slide for Introduction {
         Frame::none().margin(Margin::same(20.0)).show(ui, |ui| {
             ui.heading("Introduction to Artistic Algorithms");
 
-            /*
-            ui.add_space(8.0);
-            ui.label("Weaknesses");
-            ui.small(" ✖ Social context");
-            ui.small(" ✖ Human emotion");
-            ui.small(" ✖ Political commentary");
-             */
 
-            //if let IntroductionState::Strengths { transition_time } = &self.state {
-                //fade_in(ui, *transition_time, |ui| {
-                    ui.add_space(10.0);
-                    ui.label("Strengths");
-                    ui.small(" ✔ Following rules");
-                    ui.small(" ✔ Performing computation");
-                    ui.small(" ✔ Harnessing chaos and randomness");
-                    ui.small(" ✔ Guided exploration");
-                //});
-            //}
+            ui.add_space(10.0);
+            ui.scope(|ui| {
+                {
+                    let body_style = ui.style_mut().text_styles.get_mut(&TextStyle::Body).unwrap();
+                    body_style.size = 36.0;
+                }
+                ui.label("Strengths");
+                ui.add_space(4.0);
+            });
+            let strengths = ["Following rules", "Performing computation", "Harnessing chaos and randomness"];
+            for (strength, fade_start) in strengths.into_iter().zip(&self.fade_starts) {
+                if let &Some(fade_start) = fade_start {
+                    fade_in(ui, fade_start, |ui| {
+                        ui.label(format!(" ✔ {}", strength));
+                    });
+                }
+            }
         });
     }
 }