Status bar: the Orin at a glance over every view, like a phone's

Link on the left (with the menu on the Dash), then hot temperature, CAN, OBD while
connected, GNSS fix and satellites, LTE, WiFi, UPS, and the dark/bright button. The
Dash's own top line is gone into it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/README.md

@@ -29,6 +29,7 @@ pirate-station-aide's (main views, then the rarely used ones grouped as Tools).
 | `AccelGraph` | `widgets/accel_graph.dart` | G-meter: a dot for lateral/longitudinal g, a trace and a peak marker over a window | smart-serow |
 | `GpsCompass` | `widgets/gps_compass.dart` | Heading arrow and bearing; "ACQ" while acquiring, "N/A" without | smart-serow, from gps-speedo |
 | `LinkChip`, `LinkDetails` | `widgets/link_status.dart` | The link's state in good / caution / alarm; address, last-message age, clock offset, USB link | Yukart |
+| `StatusBar` | `widgets/status_bar.dart` | The Orin like a phone's status bar, over every view: link, then hot temperature, CAN, OBD (while connected), GNSS fix and satellites, LTE, WiFi, UPS; and the dark/bright button | Yukart |
 | `MockBanner` | `widgets/mock_banner.dart` | "MOCK DATA — NOT FROM THE CAR" in caution, over every page while the gateway is mocking | Yukart |
 
 ## Conventions
@@ -41,7 +42,7 @@ pirate-station-aide's (main views, then the rarely used ones grouped as Tools).
   `onFill(colour)` (text on a fill). No widget names a colour. Themes are JSON in `assets/themes/`, `rei` by
   default; smart-serow's four-key files still load (their `highlight` is `alarm`).
 - **Dark or bright.** `Themes.mode` is `auto` (Android's dark theme, schedule included), `dark` or
-  `bright`, chosen in Settings and kept across restarts. The Dash's quick button holds the other variant;
+  `bright`, chosen in Settings and kept across restarts. The status bar's button holds the other variant;
   a long press there is auto again.
 - **Cosmetic fonts are opt-in.** A widget that wants the HUD face names `fontFamily: hudFont` in its own
   `TextStyle`; everything else keeps the basic font, which covers CJK where DIN 1451 does not.

lib/pages/dash.dart

@@ -6,7 +6,6 @@
 import 'package:flutter/material.dart';
 
 import '../link/boundary.dart';
-import '../shell_scope.dart';
 import '../link/reading.dart';
 import '../theme/palette.dart';
 import '../widgets/accel_graph.dart';
@@ -16,14 +15,13 @@ import '../widgets/telltale.dart';
 import '../widgets/whiskey_mark.dart';
 
 class DashPage extends StatelessWidget {
-  const DashPage({super.key, required this.boundary, required this.themes});
+  const DashPage({super.key, required this.boundary});
   final Boundary boundary;
-  final Themes themes;
 
   @override
   Widget build(BuildContext context) {
     return ListenableBuilder(
-      listenable: Listenable.merge([boundary, themes]),
+      listenable: boundary,
       builder: (context, _) {
         final p = AppTheme.of(context);
         final b = boundary;
@@ -50,7 +48,6 @@ class DashPage extends StatelessWidget {
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: [
-                _DashBar(boundary: b, themes: themes),
                 Expanded(
                   child: Padding(
                     padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
@@ -163,44 +160,3 @@ class DashPage extends StatelessWidget {
     );
   }
 }
-
-/// The dash's own thin top line: the menu, link state, and the dark/bright quick switch.
-class _DashBar extends StatelessWidget {
-  const _DashBar({required this.boundary, required this.themes});
-  final Boundary boundary;
-  final Themes themes;
-
-  @override
-  Widget build(BuildContext context) {
-    final p = AppTheme.of(context);
-    final (text, color) = switch (boundary.state) {
-      LinkState.up => ('LINK', p.subdued),
-      LinkState.connecting => ('CONNECTING', p.caution),
-      LinkState.down => ('NO LINK', p.alarm),
-    };
-    return SizedBox(
-      height: 40,
-      child: Row(
-        children: [
-          MenuButton(color: p.subdued),
-          Text(text, style: TextStyle(color: color, letterSpacing: 2)),
-          const Spacer(),
-          // Tap: hold the other variant. Long press: back to auto (Settings has both).
-          GestureDetector(
-            onLongPress: () => themes.mode = VariantMode.auto,
-            child: IconButton(
-              tooltip: themes.isDark ? 'Bright' : 'Dark',
-              onPressed: themes.toggle,
-              icon: Icon(
-                themes.mode == VariantMode.auto
-                    ? Icons.brightness_auto
-                    : (themes.isDark ? Icons.light_mode : Icons.dark_mode),
-                color: p.subdued,
-              ),
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}

lib/shell.dart

@@ -20,6 +20,7 @@ import 'shell_scope.dart';
 import 'theme/palette.dart';
 import 'widgets/link_status.dart';
 import 'widgets/mock_banner.dart';
+import 'widgets/status_bar.dart';
 
 class AppShell extends StatefulWidget {
   const AppShell({
@@ -53,7 +54,7 @@ class _AppShellState extends State<AppShell> {
   Widget _page(ShellView v) {
     final b = widget.boundary;
     return switch (v) {
-      ShellView.dash => DashPage(boundary: b, themes: widget.themes),
+      ShellView.dash => DashPage(boundary: b),
       ShellView.signals => SignalsPage(boundary: b, usb: widget.usb),
       ShellView.captures => Navigator(
         key: _captures,
@@ -113,14 +114,30 @@ class _AppShellState extends State<AppShell> {
                 },
               ),
               body: ListenableBuilder(
-                listenable: widget.boundary,
+                listenable: Listenable.merge([widget.boundary, widget.themes]),
                 builder: (context, child) => Column(
                   crossAxisAlignment: CrossAxisAlignment.stretch,
                   children: [
-                    if (widget.boundary.mock)
-                      const SafeArea(bottom: false, child: MockBanner()),
-                    // Pages draw their own top (app bars); keep every bottom clear of the system bar.
-                    Expanded(child: SafeArea(top: false, child: child!)),
+                    // The Orin's status over every view; the Dash, with no app bar, gets the menu in it.
+                    SafeArea(
+                      bottom: false,
+                      child: StatusBar(
+                        boundary: widget.boundary,
+                        themes: widget.themes,
+                        leading: current == ShellView.dash
+                            ? MenuButton(color: AppTheme.of(context).subdued)
+                            : null,
+                      ),
+                    ),
+                    if (widget.boundary.mock) const MockBanner(),
+                    // The status bar took the top inset; keep every bottom clear of the system bar.
+                    Expanded(
+                      child: MediaQuery.removePadding(
+                        context: context,
+                        removeTop: true,
+                        child: SafeArea(top: false, child: child!),
+                      ),
+                    ),
                   ],
                 ),
                 child: IndexedStack(

lib/widgets/status_bar.dart

@@ -0,0 +1,232 @@
+// The Orin at a glance, the way a phone's status bar shows the phone: the link on the
+// left, then its links out and its power on the right, and the dark/bright switch.
+// Drawn by the shell above every view (DASH-NEXT.md item 1).
+//
+// An indicator shows its state in palette roles: foreground when fine, caution when
+// degraded or on battery, alarm when down, subdued when stale or unknown. Things
+// that are only news when wrong (temperature) appear only then; ones that are only
+// news when present (the ELM, a modem) appear only then.
+
+import 'package:flutter/material.dart';
+
+import '../link/boundary.dart';
+import '../link/reading.dart';
+import '../theme/palette.dart';
+
+class StatusBar extends StatelessWidget {
+  const StatusBar({
+    super.key,
+    required this.boundary,
+    required this.themes,
+    this.leading,
+  });
+  final Boundary boundary;
+  final Themes themes;
+
+  /// Before the link state: the menu button, on a view with no app bar of its own.
+  final Widget? leading;
+
+  static const height = 32.0;
+
+  @override
+  Widget build(BuildContext context) {
+    final p = AppTheme.of(context);
+    final b = boundary;
+    Reading r(String n) => Reading.of(b, n);
+    final up = b.state == LinkState.up;
+    final (text, color) = switch (b.state) {
+      LinkState.up => ('LINK', p.subdued),
+      LinkState.connecting => ('CONNECTING', p.caution),
+      LinkState.down => ('NO LINK', p.alarm),
+    };
+    return SizedBox(
+      height: height,
+      child: IconTheme(
+        data: IconThemeData(size: 18, color: p.foreground),
+        child: DefaultTextStyle(
+          style: TextStyle(
+            fontSize: 14,
+            color: p.foreground,
+            fontFeatures: const [FontFeature.tabularFigures()],
+          ),
+          child: Row(
+            children: [
+              if (leading != null) leading! else const SizedBox(width: 16),
+              Text(text, style: TextStyle(color: color, letterSpacing: 2)),
+              const Spacer(),
+              // Without the link, every Orin value is old news.
+              if (up) ...[
+                ..._temperature(p, r('orin_tj_temp_c')),
+                ..._can(p, r('can_up'), r('can_bus_state')),
+                ..._elm(p, r('elm_connected')),
+                ..._gnss(p, r('gnss_fix'), r('gnss_satellites')),
+                ..._lte(
+                  p,
+                  r('net_lte_state'),
+                  r('net_lte_tech'),
+                  r('net_lte_signal_pct'),
+                ),
+                ..._wifi(p, r('net_wifi_up'), r('net_wifi_signal_dbm')),
+                ..._ups(p, r('ups_state'), r('ups_battery_pct')),
+              ],
+              _VariantButton(themes: themes),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  /// One indicator: an icon, maybe a short text, and the gap after it.
+  static List<Widget> _item(Color c, {IconData? icon, String? text}) => [
+    if (icon != null) Icon(icon, color: c),
+    if (icon != null && text != null) const SizedBox(width: 2),
+    if (text != null) Text(text, style: TextStyle(color: c)),
+    const SizedBox(width: 14),
+  ];
+
+  /// Only when hot: caution from 80 °C, alarm from 90 (the Orin throttles near 99).
+  static List<Widget> _temperature(Palette p, Reading t) {
+    final c = t.number;
+    if (t.dim || c == null || c < 80) return [];
+    return _item(
+      c >= 90 ? p.alarm : p.caution,
+      icon: Icons.thermostat,
+      text: '${c.round()}°',
+    );
+  }
+
+  static List<Widget> _can(Palette p, Reading up, Reading state) {
+    if (up.value == null) return _item(p.subdued, text: 'CAN');
+    final color = switch ((up.on, state.value)) {
+      (false, _) || (_, 'BUS-OFF') || (_, 'STOPPED') => p.alarm,
+      (_, 'ERROR-WARNING') || (_, 'ERROR-PASSIVE') => p.caution,
+      _ => p.foreground,
+    };
+    return _item(up.dim ? p.subdued : color, text: 'CAN');
+  }
+
+  /// The OBD-II adapter, only while connected (it is for calibration, not always on).
+  static List<Widget> _elm(Palette p, Reading c) => c.on
+      ? _item(
+          c.dim ? p.subdued : p.foreground,
+          icon: Icons.bluetooth_connected,
+          text: 'OBD',
+        )
+      : [];
+
+  static List<Widget> _gnss(Palette p, Reading fix, Reading sats) {
+    final n = sats.number?.round();
+    final (icon, color) = switch (fix.value) {
+      '3d' => (Icons.gps_fixed, p.foreground),
+      '2d' => (Icons.gps_fixed, p.caution),
+      'none' => (Icons.gps_not_fixed, p.caution),
+      _ => (Icons.gps_off, p.subdued),
+    };
+    return _item(
+      fix.dim ? p.subdued : color,
+      icon: icon,
+      text: n == null ? null : '$n',
+    );
+  }
+
+  /// The modem, when there is one: bars from its signal, and the technology.
+  static List<Widget> _lte(
+    Palette p,
+    Reading state,
+    Reading tech,
+    Reading pct,
+  ) {
+    final s = state.value as String?;
+    if (s == null) return [];
+    final q = pct.number ?? 0;
+    final t = (tech.value as String? ?? '').toUpperCase();
+    final (icon, color) = switch (s) {
+      'connected' => (
+        q >= 60
+            ? Icons.signal_cellular_alt
+            : q >= 30
+            ? Icons.signal_cellular_alt_2_bar
+            : Icons.signal_cellular_alt_1_bar,
+        p.foreground,
+      ),
+      'registered' ||
+      'searching' ||
+      'connecting' ||
+      'enabling' => (Icons.signal_cellular_alt_1_bar, p.caution),
+      _ => (Icons.signal_cellular_off, p.subdued),
+    };
+    return _item(
+      state.dim ? p.subdued : color,
+      icon: icon,
+      text: t.isEmpty ? null : t,
+    );
+  }
+
+  static List<Widget> _wifi(Palette p, Reading up, Reading dbm) {
+    if (!up.on) return _item(p.subdued, icon: Icons.wifi_off);
+    final d = dbm.number ?? -100;
+    final icon = d >= -60
+        ? Icons.wifi
+        : d >= -70
+        ? Icons.wifi_2_bar
+        : Icons.wifi_1_bar;
+    return _item(up.dim ? p.subdued : p.foreground, icon: icon);
+  }
+
+  /// The UPS: caution on battery (the car is off), alarm under 20 %.
+  static List<Widget> _ups(Palette p, Reading state, Reading pct) {
+    final n = pct.number;
+    if (n == null) return _item(p.subdued, icon: Icons.battery_unknown);
+    const bars = [
+      Icons.battery_0_bar,
+      Icons.battery_1_bar,
+      Icons.battery_2_bar,
+      Icons.battery_3_bar,
+      Icons.battery_4_bar,
+      Icons.battery_5_bar,
+      Icons.battery_6_bar,
+      Icons.battery_full,
+    ];
+    final charging = state.value == 'charging';
+    final icon = charging
+        ? Icons.battery_charging_full
+        : bars[(n / 100 * 7).round().clamp(0, 7)];
+    final color = n < 20
+        ? p.alarm
+        : state.value == 'discharging'
+        ? p.caution
+        : p.foreground;
+    return _item(
+      pct.dim ? p.subdued : color,
+      icon: icon,
+      text: '${n.round()}%',
+    );
+  }
+}
+
+/// Tap: hold the other variant. Long press: back to auto (Settings has all three).
+class _VariantButton extends StatelessWidget {
+  const _VariantButton({required this.themes});
+  final Themes themes;
+
+  @override
+  Widget build(BuildContext context) {
+    final p = AppTheme.of(context);
+    return GestureDetector(
+      onLongPress: () => themes.mode = VariantMode.auto,
+      child: IconButton(
+        tooltip: themes.isDark ? 'Bright' : 'Dark',
+        onPressed: themes.toggle,
+        iconSize: 20,
+        visualDensity: VisualDensity.compact,
+        icon: Icon(
+          themes.mode == VariantMode.auto
+              ? Icons.brightness_auto
+              : (themes.isDark ? Icons.light_mode : Icons.dark_mode),
+          color: p.subdued,
+        ),
+      ),
+    );
+  }
+}