rework app logic

Signed-off-by: Frank Villaro-Dixon <frank@villaro-dixon.eu>

src/main.rs

@@ -50,7 +50,8 @@ fn run(
             .expect("Cannot add font"),
     };
 
-    let mut beo = ui::BeoUi::new(get_beo_apps());
+    let apps = get_beo_apps();
+    let mut beo = ui::BeoUi::new(apps);
 
     let start = Instant::now();
     let mut prevt = start;

src/ui.rs

@@ -7,6 +7,7 @@ use crate::roundy_math;
 
 pub struct BeoUi {
     pub beo_apps: BeoApps,
+    pub current_app_id: Option<usize>,
     pub laser_pct: f32,
 }
 
@@ -24,6 +25,7 @@ impl BeoUi {
     pub fn new(apps: BeoApps) -> BeoUi {
         BeoUi {
             beo_apps: apps,
+            current_app_id: None,
             laser_pct: 0.0,
         }
     }
@@ -32,7 +34,7 @@ impl BeoUi {
         match event {
             Beo5Event::LaserPosition(pct) => {
                 self.laser_pct = pct;
-                println!("Laser moved to {}%", pct * 100.);
+                self.choose_app_from_laser_pct();
             }
             _ => {
                 // TODO: pass event to current app
@@ -42,9 +44,7 @@ impl BeoUi {
 
     pub fn draw<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts) {
         self.draw_main_menu(canvas, fonts);
-        if let Some(selected_app_id) = self.lasered_application_id() {
-            let selected_app = self.beo_apps.apps.get(selected_app_id).unwrap();
-
+        if let Some(selected_app) = self.current_app() {
             let mut paint_title = Paint::color(Color::hex("FFFFFF"));
             paint_title.set_font(&[fonts.bold]);
             paint_title.set_text_baseline(Baseline::Top);
@@ -59,10 +59,11 @@ impl BeoUi {
         }
     }
 
-    fn lasered_application_id(&self) -> Option<usize> {
+    fn choose_app_from_laser_pct(&mut self) {
         let app_count = self.beo_apps.apps.len();
         if app_count == 0 {
-            return None;
+            self.current_app_id = None;
+            return;
         }
 
         let dx = 100.0 / (app_count as f32 * 2.);
@@ -72,10 +73,16 @@ impl BeoUi {
             let evt_app_pos = dx * (i * 2 + 1) as f32 * CANVAS_HEIGHT / 100.0;
             let delta = (laser_y - evt_app_pos).abs();
             if delta < LASER_EPS_MATCH {
-                return Some(i);
+                self.current_app_id = Some(i);
+                return;
+                //Some(&self.beo_apps.apps[i]);
             }
         }
-        None
+        self.current_app_id = None;
+    }
+
+    fn current_app(&self) -> Option<&Box<dyn App>> {
+        self.current_app_id.map(|id| &self.beo_apps.apps[id])
     }
 
     fn draw_main_menu<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts) {
@@ -107,13 +114,16 @@ impl BeoUi {
         let mut paint_selected = Paint::color(Color::hex("D7612E"));
         paint_selected.set_font(&[fonts.bold]);
         paint_selected.set_text_baseline(Baseline::Top);
-        for i in 0..apps.len() {
-            if self.lasered_application_id() == Some(i) {
-                let _ =
-                    canvas.fill_text(pts[i].x, pts[i].y, apps[i].base().name(), &paint_selected);
-            } else {
-                let _ = canvas.fill_text(pts[i].x, pts[i].y, apps[i].base().name(), &paint_normal);
-            }
+
+        let mut i = 0;
+        for app in apps {
+            //if self.current_app == Some(app) {
+            //    let _ =
+            //        canvas.fill_text(pts[i].x, pts[i].y, apps[i].base().name(), &paint_selected);
+            //} else {
+            let _ = canvas.fill_text(pts[i].x, pts[i].y, app.base().name(), &paint_normal);
+            // }
+            i += 1;
         }
 
         // draw the laser