have sliding submenus

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

src/apps.rs

@@ -2,15 +2,9 @@ pub struct BeoApps {
     pub apps: Vec<Box<dyn App>>,
 }
 
-pub struct MainMenu {
-    // Can either be the default, or the current
-    pub selected_id: usize,
-    pub names: Vec<String>,
-}
-
 pub struct AppBase {
     name: String,
-    pub main_menu: MainMenu,
+    pub main_menu: Menu,
 }
 
 impl AppBase {
@@ -19,6 +13,37 @@ impl AppBase {
     }
 }
 
+#[derive(Debug, Clone)]
+pub struct Menu {
+    pub submenus: Vec<Box<Menu>>,
+    current_submenu_id: usize,
+    pub selected_submenu: Option<Box<Menu>>,
+    pub name: String,
+    //pub image: Option<Image>,
+}
+
+impl Menu {
+    pub fn go_left(&mut self) {
+        if self.current_submenu_id > 0 {
+            self.current_submenu_id -= 1;
+        }
+    }
+    pub fn go_right(&mut self) {
+        if self.current_submenu_id < self.submenus.len() - 1 {
+            self.current_submenu_id += 1;
+        }
+    }
+    fn select_submenu(&mut self) {
+        self.selected_submenu = Some(self.submenus[self.current_submenu_id].clone());
+    }
+
+    pub fn get_deepest_selected_submenu(&self) -> &Menu {
+        match &self.selected_submenu {
+            Some(selected_submenu) => selected_submenu.get_deepest_selected_submenu(),
+            None => self,
+        }
+    }
+}
 pub trait App {
     fn base(&self) -> &AppBase;
     fn base_mut(&mut self) -> &mut AppBase;
@@ -31,20 +56,58 @@ struct Spotify {
 
 impl Spotify {
     fn new() -> Self {
+        let spotify_menus = vec![
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Playlists".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Artists".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Albums".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Songs".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Genres".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "New Releases".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Charts".to_string(),
+            }),
+        ];
         Spotify {
             base: AppBase {
                 name: "Spotify".to_string(),
-                main_menu: MainMenu {
-                    selected_id: 0,
-                    names: vec![
-                        "Playlists".to_string(),
-                        "Artists".to_string(),
-                        "Albums".to_string(),
-                        "Songs".to_string(),
-                        "Genres".to_string(),
-                        "New Releases".to_string(),
-                        "Charts".to_string(),
-                    ],
+                main_menu: Menu {
+                    submenus: spotify_menus,
+                    current_submenu_id: 0,
+                    selected_submenu: None,
+                    name: "XXX first one unused".to_string(),
                 },
             },
         }
@@ -67,16 +130,34 @@ struct Radio {
 
 impl Radio {
     fn new() -> Self {
+        let radio_menus = vec![
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Favorites".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Local".to_string(),
+            }),
+            Box::new(Menu {
+                submenus: vec![],
+                current_submenu_id: 0,
+                selected_submenu: None,
+                name: "Global".to_string(),
+            }),
+        ];
         Radio {
             base: AppBase {
                 name: "Radio".to_string(),
-                main_menu: MainMenu {
-                    selected_id: 0,
-                    names: vec![
-                        "Favorites".to_string(),
-                        "Local".to_string(),
-                        "Global".to_string(),
-                    ],
+                main_menu: Menu {
+                    submenus: radio_menus,
+                    current_submenu_id: 0,
+                    selected_submenu: None,
+                    name: "XXX first one unused".to_string(),
                 },
             },
         }
@@ -92,42 +173,7 @@ impl App for Radio {
     }
 }
 
-struct Settings {
-    base: AppBase,
-}
-
-impl Settings {
-    fn new() -> Self {
-        Settings {
-            base: AppBase {
-                name: "Settings".to_string(),
-                main_menu: MainMenu {
-                    selected_id: 0,
-                    names: vec![
-                        "Display".to_string(),
-                        "Sound".to_string(),
-                        "Network".to_string(),
-                    ],
-                },
-            },
-        }
-    }
-}
-
-impl App for Settings {
-    fn base(&self) -> &AppBase {
-        &self.base
-    }
-    fn base_mut(&mut self) -> &mut AppBase {
-        &mut self.base
-    }
-}
-
 pub fn get_beo_apps() -> BeoApps {
-    let apps: Vec<Box<dyn App>> = vec![
-        Box::new(Spotify::new()),
-        Box::new(Radio::new()),
-        Box::new(Settings::new()),
-    ];
+    let apps: Vec<Box<dyn App>> = vec![Box::new(Spotify::new()), Box::new(Radio::new())];
     BeoApps { apps }
 }

src/hid.rs

@@ -78,7 +78,6 @@ impl Beo5Device {
 
         match evts {
             Ok(evts) => {
-                println!("Will iterate!");
                 for ev in evts {
                     match ev.kind() {
                         evdev::InputEventKind::Synchronization(_) => {}

src/main.rs

@@ -20,6 +20,7 @@ struct Fonts {
     app_title: Paint,
     app_menu: Paint,
     app_menu_selected: Paint,
+    menu_wheel: Paint,
 }
 
 fn main() {
@@ -69,12 +70,19 @@ fn run(
     app_menu_selected.set_text_align(Align::Center);
     app_menu_selected.set_font_size(14.);
 
+    let mut menu_wheel = Paint::color(Color::hex("F0F0FF"));
+    menu_wheel.set_font(&[font_bold]);
+    menu_wheel.set_text_baseline(Baseline::Top);
+    menu_wheel.set_text_align(Align::Right);
+    menu_wheel.set_font_size(14.);
+
     let fonts = Fonts {
         sans: font_sans,
         bold: font_bold,
         app_title,
         app_menu,
         app_menu_selected,
+        menu_wheel,
     };
 
     let apps = get_beo_apps();
@@ -106,7 +114,6 @@ fn run(
         let hw_event = beo_device.get_event_nonblocking();
         match hw_event {
             Some(ev) => {
-                println!("HW Event: {:?}", ev);
                 beo.accept_event(ev);
             }
             None => {}
@@ -177,6 +184,8 @@ fn run(
                 }
             },
             Event::RedrawRequested(_) => {
+                beo.dt_update(1.0 / 60.0);
+
                 let dpi_factor = window.scale_factor();
                 let size = window.inner_size();
                 canvas.set_size(size.width, size.height, dpi_factor as f32);

src/roundy_math.rs

@@ -58,4 +58,14 @@ impl VirtualCircle {
 
         self.center.x - (self.radius.powf(2.) - (y - self.center.y).powf(2.)).sqrt()
     }
+
+    pub fn get_point_from_angle_bcircle(&self, angle_deg: f32) -> Point {
+        // The beocircle has 0 at middle left, -90 at the top, 90 at the bottom
+        let angle_deg = angle_deg - 90.;
+        let angle_rad = angle_deg.to_radians();
+
+        let x = angle_rad.sin() * self.radius + self.center.x;
+        let y = -angle_rad.cos() * self.radius + self.center.y;
+        Point { x, y }
+    }
 }

src/ui.rs

@@ -14,12 +14,21 @@ pub struct BeoUi {
     // XXX for items in menu
     //displayed_menu_item_id: Option<f32>,
     laser_pct: f32, // XXX this could be removed as only used when laser moved, could be given to fn directly
+
+    // Stores the "angle shift" as defined by the infinite wheel.
+    // The quadrant is an "inverted" unit circle: 0 at the left, -90 at the top, 90 at the bottom
+    angle_shift: f32,
+    time_without_wheel_spin: f32,
 }
 
 const CANVAS_HEIGHT: f32 = 768.;
 const CANVAS_WIDTH: f32 = 1024.;
 const LASER_EPS_MATCH: f32 = 15.0;
-const MAIN_MENU_CIRCLE_RADIUS: f32 = CANVAS_WIDTH - 30.;
+const LASER_MENU_CIRCLE_RADIUS: f32 = CANVAS_WIDTH - 30.;
+const MENU_CIRCLE_RADIUS: f32 = 200.;
+const ANGLE_DEG_BETWEEN_MENU_ITEMS: f32 = 40.;
+const K: f32 = 0.04;
+const DO_MAGNET_AFTER_SECS: f32 = 0.2;
 
 fn laser_pct_to_y_pos(pct: f32) -> f32 {
     // This is only y pos in the main menu circle, which we suppose is a const
@@ -30,8 +39,81 @@ impl BeoUi {
     pub fn new(apps: BeoApps) -> BeoUi {
         BeoUi {
             beo_apps: apps,
-            current_app_id: None,
+            current_app_id: Some(0),
             laser_pct: 0.0,
+            angle_shift: 0.0,
+            time_without_wheel_spin: 0.0,
+        }
+    }
+
+    pub fn dt_update(&mut self, dt: f32) {
+        // We do things that are time dependent here
+
+        self.time_without_wheel_spin += dt;
+        //For example, round the angle to the nearest ANGLE_DEG
+
+        self.adjust_wheel_angle();
+    }
+
+    fn adjust_wheel_angle(&mut self) {
+        // This function is called when the wheel is not spinning
+        // It will adjust the angle to the nearest multiple of ANGLE_DEG_BETWEEN_MENU_ITEMS
+        let angle_reminder = self.angle_shift % ANGLE_DEG_BETWEEN_MENU_ITEMS;
+
+        let sign = if angle_reminder > 0. { 1. } else { -1. };
+        let angle_abs = angle_reminder.abs();
+        if self.time_without_wheel_spin > DO_MAGNET_AFTER_SECS {
+            if angle_abs > 0.1 {
+                // XXX TODO :angle abs: make it symmetrical
+                if angle_abs < ANGLE_DEG_BETWEEN_MENU_ITEMS / 2. {
+                    //println!("1. Adjusting angle: {} * {}", sign, angle_abs * K);
+                    self.angle_shift -= sign * angle_abs * K;
+                } else {
+                    //println!("2. Adjusting angle: {} * {}", sign, angle_abs * K);
+                    self.angle_shift += sign * angle_abs * K;
+                }
+            } else {
+                self.angle_shift -= angle_abs * sign;
+            }
+        }
+
+        if self.angle_shift < -10. {
+            // Let the magnet bring it back to 0
+            self.angle_shift = -10.;
+        }
+
+        if let Some(selected_app) = self.current_app() {
+            let selected_menu = selected_app.base().main_menu.get_deepest_selected_submenu();
+            let menu_count = selected_menu.submenus.len();
+            let max_angle = (menu_count - 1) as f32 * ANGLE_DEG_BETWEEN_MENU_ITEMS + 10.;
+
+            if self.angle_shift > max_angle {
+                self.angle_shift = max_angle;
+            }
+        }
+
+        self.choose_app_wheel_angle();
+    }
+
+    fn choose_app_wheel_angle(&mut self) {
+        if let Some(selected_app) = self.current_app() {
+            let selected_menu = selected_app.base().main_menu.get_deepest_selected_submenu();
+            let menu_count = selected_menu.submenus.len();
+            let max_angle = (menu_count - 1) as f32 * -ANGLE_DEG_BETWEEN_MENU_ITEMS - 10.;
+
+            let angle = self.angle_shift;
+            println!("Angle before: {}", angle);
+            let angle = angle.max(max_angle);
+            let angle = angle.min(0.);
+
+            println!("Angle: {}", angle);
+            let menu_id_unrounded = (angle - max_angle) / ANGLE_DEG_BETWEEN_MENU_ITEMS;
+            println!("Menu id unrounded: {}", menu_id_unrounded);
+            let menu_id_unrounded = angle / ANGLE_DEG_BETWEEN_MENU_ITEMS;
+            println!("Menu id unrounded bis : {}", menu_id_unrounded);
+            let menu_id = (angle / ANGLE_DEG_BETWEEN_MENU_ITEMS).round() as usize;
+            println!("Menu id: {}", menu_id);
+            //selected_app.base_mut().main_menu.selected_id = menu_id;
         }
     }
 
@@ -44,15 +126,20 @@ impl BeoUi {
             Beo5Event::LeftButtonPressed => {
                 println!("Left button pressed");
                 if let Some(selected_app) = self.current_app_mut() {
-                    selected_app.base_mut().main_menu.selected_id += 1;
+                    selected_app.base_mut().main_menu.go_left();
                 }
             }
             Beo5Event::RightButtonPressed => {
                 println!("Right button pressed");
                 if let Some(selected_app) = self.current_app_mut() {
-                    selected_app.base_mut().main_menu.selected_id -= 1;
+                    selected_app.base_mut().main_menu.go_right();
                 }
             }
+            Beo5Event::SelectionWheelRel(rel_angle_eps) => {
+                self.time_without_wheel_spin = 0.0;
+                self.angle_shift += rel_angle_eps as f32;
+                self.adjust_wheel_angle();
+            }
             _ => {
                 // TODO: pass event to current app
             }
@@ -60,7 +147,7 @@ impl BeoUi {
     }
 
     pub fn draw<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts) {
-        self.draw_main_menu(canvas, fonts);
+        self.draw_laser_menu(canvas, fonts);
 
         if let Some(selected_app) = self.current_app() {
             self.draw_app(canvas, fonts, selected_app);
@@ -95,17 +182,17 @@ impl BeoUi {
         self.current_app_id.map(|id| &mut self.beo_apps.apps[id])
     }
 
-    fn draw_main_menu<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts) {
+    fn draw_laser_menu<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts) {
         let canvas_width = canvas.width();
         let canvas_height = canvas.height();
 
         // circle is centered on the right side of the screen
-        let main_menu_circle = roundy_math::VirtualCircle {
+        let laser_menu_circle = roundy_math::VirtualCircle {
             center: roundy_math::Point {
                 x: canvas_width as f32,
                 y: canvas_height as f32 / 2.0,
             },
-            radius: MAIN_MENU_CIRCLE_RADIUS,
+            radius: LASER_MENU_CIRCLE_RADIUS,
         };
 
         let canvas_size = roundy_math::Point {
@@ -115,7 +202,7 @@ impl BeoUi {
 
         // draw the main apps in the circle
         let apps = &self.beo_apps.apps;
-        let pts = main_menu_circle.get_equidistant_points(apps.len(), canvas_size);
+        let pts = laser_menu_circle.get_equidistant_points(apps.len(), canvas_size);
 
         // XXX To be taken from global struct
         let mut paint_normal = Paint::color(Color::hex("B7410E"));
@@ -142,77 +229,148 @@ impl BeoUi {
         let ellipse_color = Paint::color(Color::hex("5C89D188"));
         let mut path = Path::new();
         let ey = laser_pct_to_y_pos(self.laser_pct);
-        let ex = main_menu_circle.get_x_on_circle(ey);
+        let ex = laser_menu_circle.get_x_on_circle(ey);
 
         path.ellipse(ex + 15., ey, 30., 10.);
         canvas.fill_path(&path, &ellipse_color);
     }
 
     fn draw_app<T: Renderer>(&self, canvas: &mut Canvas<T>, fonts: &Fonts, app: &Box<dyn App>) {
+        let current_app_deepest_menu = &app.base().main_menu.get_deepest_selected_submenu();
+
+        let menu_circle = roundy_math::VirtualCircle {
+            center: roundy_math::Point {
+                x: canvas.width() as f32,
+                y: canvas.height() as f32 / 2.0,
+            },
+            radius: MENU_CIRCLE_RADIUS,
+        };
+
+        for i in 0..current_app_deepest_menu.submenus.len() {
+            let angle = i as f32 * -ANGLE_DEG_BETWEEN_MENU_ITEMS + self.angle_shift;
+            if angle > -90. && angle < 90. {
+                let pos = menu_circle.get_point_from_angle_bcircle(angle);
+                let n = format!(
+                    "{}: {} ({}°)",
+                    i, current_app_deepest_menu.submenus[i].name, angle
+                );
+                let _ = canvas.fill_text(
+                    pos.x,
+                    pos.y,
+                    &n, //current_app_deepest_menu.submenus[i].name,
+                    &fonts.menu_wheel,
+                );
+                continue;
+            }
+        }
+
         /*
-        let biggest_menu_name = app
-            .base()
-            .main_menu
-            .names
-            .iter()
-            .max_by_key(|x| x.len())
-            .unwrap();
+        let menus_count = current_app_deepest_menu.submenus.len();
 
-        let menu_separated_px = biggest_menu_name.len() as f32 * 8.;
+        let menu_circle = roundy_math::VirtualCircle {
+            center: roundy_math::Point {
+                x: canvas_width as f32,
+                y: canvas_height as f32 / 2.0,
+            },
+            radius: MENU_CIRCLE_RADIUS,
+        };
+
+        let canvas_size = roundy_math::Point {
+            x: canvas_width as f32,
+            y: canvas_height as f32,
+        };
+
+        // draw the main apps in the circle
+        let apps = &self.beo_apps.apps;
+        let pts = laser_menu_circle.get_equidistant_points(apps.len(), canvas_size);
+
+        // XXX To be taken from global struct
+        let mut paint_normal = Paint::color(Color::hex("B7410E"));
+        paint_normal.set_font(&[fonts.sans]);
+        paint_normal.set_text_baseline(Baseline::Top);
+
+        let mut paint_selected = Paint::color(Color::hex("D7612E"));
+        paint_selected.set_font(&[fonts.bold]);
+        paint_selected.set_text_baseline(Baseline::Top);
+
+        for appid in 0..apps.len() {
+            let paint;
+            if self.current_app_id == Some(appid) {
+                paint = &paint_selected;
+            } else {
+                paint = &paint_normal;
+            }
+
+            let app = &apps[appid];
+            let _ = canvas.fill_text(pts[appid].x, pts[appid].y, app.base().name(), paint);
+        }
+
+        // draw the laser
+        let ellipse_color = Paint::color(Color::hex("5C89D188"));
+        let mut path = Path::new();
+        let ey = laser_pct_to_y_pos(self.laser_pct);
+        let ex = laser_menu_circle.get_x_on_circle(ey);
+
+        path.ellipse(ex + 15., ey, 30., 10.);
+        canvas.fill_path(&path, &ellipse_color);
         */
+    }
+    /*
 
-        let num_menu_elements_before = 1;
-        let num_menu_elements_after = 2;
-        // That means max 1 + >1< + 2 = 4 elements in total
-        // Minimum aronud 3: 0 + >1< + 2
 
-        let current_menu_id = app.base().main_menu.selected_id;
-        let menu_elements = &app.base().main_menu.names;
 
-        // Calculate indices for slices
-        let start_before =
-            (current_menu_id as isize - num_menu_elements_before as isize).max(0) as usize;
-        let end_before = current_menu_id;
-        let start_after = current_menu_id + 1;
-        let end_after =
-            ((current_menu_id + 1 + num_menu_elements_after).min(menu_elements.len())) as usize;
+    let num_menu_elements_before = 1;
+    let num_menu_elements_after = 2;
+    // That means max 1 + >1< + 2 = 4 elements in total
+    // Minimum aronud 3: 0 + >1< + 2
 
-        // Safely getting slices using clamping
-        let menu_elems_before = &menu_elements[start_before..end_before];
-        let menu_elem_selected = &menu_elements[current_menu_id];
-        let menu_elems_after = &menu_elements[start_after..end_after];
+    let current_menu_id = app.base().main_menu.selected_id;
+    let menu_elements = &app.base().main_menu.names;
 
-        //println!("menu_elems_before: {:?}", menu_elems_before);
-        //println!("current_menu: {:?}", menu_elem_selected);
-        //println!("menu_elems_after: {:?}", menu_elems_after);
+    // Calculate indices for slices
+    let start_before =
+        (current_menu_id as isize - num_menu_elements_before as isize).max(0) as usize;
+    let end_before = current_menu_id;
+    let start_after = current_menu_id + 1;
+    let end_after =
+        ((current_menu_id + 1 + num_menu_elements_after).min(menu_elements.len())) as usize;
 
-        let mut toti = 0.;
-        for i in 0..menu_elems_before.len() {
+    // Safely getting slices using clamping
+    let menu_elems_before = &menu_elements[start_before..end_before];
+    let menu_elem_selected = &menu_elements[current_menu_id];
+    let menu_elems_after = &menu_elements[start_after..end_after];
+
+    let mut toti = 0.;
+    for i in 0..num_menu_elements_before {
+        // This is a special case: we reserve some space
+        //so that the current menu is always at the same place
+        if i < menu_elems_before.len() {
             let _ = canvas.fill_text(
                 toti * 100. + 50.,
                 CANVAS_HEIGHT - 80.,
                 &menu_elems_before[i],
                 &fonts.app_menu,
             );
-            toti += 1.;
         }
+        toti += 1.;
+    }
 
+    let _ = canvas.fill_text(
+        toti * 100. + 50.,
+        CANVAS_HEIGHT - 80.,
+        &menu_elem_selected,
+        &fonts.app_menu_selected,
+    );
+    toti += 1.;
+
+    for i in 0..menu_elems_after.len() {
         let _ = canvas.fill_text(
             toti * 100. + 50.,
             CANVAS_HEIGHT - 80.,
-            &menu_elem_selected,
-            &fonts.app_menu_selected,
+            &menu_elems_after[i],
+            &fonts.app_menu,
         );
         toti += 1.;
-
-        for i in 0..menu_elems_after.len() {
-            let _ = canvas.fill_text(
-                toti * 100. + 50.,
-                CANVAS_HEIGHT - 80.,
-                &menu_elems_after[i],
-                &fonts.app_menu,
-            );
-            toti += 1.;
-        }
     }
+    */
 }