Add volume control to bottom panel

Changes:
- Import a reworked version of the KUKSA.val client code from the
  Flutter dashboard app, with the aggregated signal Riverpod provider
  replaced with per-signal providers for the signal the homescreen
  needs and a couple of temperature ones it might use.  Using separate
  providers is more in-line with recommended Riverpod best practices.
- Various tweaks to enable using Riverpod.
- Split the bottom panel out into its own widget, and add a stack in
  it to layer the default logo panel with the volume control slider,
  which has been added as a new widget definition to provide the hook
  to drive timer based lowering behavior like the Qt homescreen does.
- The KUKSA.val connection widget has been added to the bottom panel
  rather than overriding the top-level widget as in the dashboard and
  HVAC apps.  This seems preferable with respect to still providing
  some functionality in the event KUKSA.val is unavailable.
- Remove the old demo dashboard and HVAC pages that are now unused,
  along with the image assets they needed, to allow cleaning up
  pubspec.yaml and ease maintenance.

Bug-AGL: SPEC-4659

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I5d9180a3461948a58321564e71134c4961ce0ef7

1 files changed, 65 insertions, 0 deletions

diff --git a/lib/vehicle-signals/viss_connected_widget.dart b/lib/vehicle-signals/viss_connected_widget.dart
new file mode 100644
index 0000000..dd3e4aa
--- /dev/null
+++ b/lib/vehicle-signals/viss_connected_widget.dart
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: Apache-2.0
+import 'dart:async';
+import 'dart:io';
+
+import 'package:flutter_homescreen/vehicle-signals/viss_config.dart';
+import 'package:flutter_homescreen/vehicle-signals/viss_methods.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_homescreen/vehicle-signals/vss_providers.dart';
+
+class VISServerConnectedWidget extends ConsumerStatefulWidget {
+  const VISServerConnectedWidget(
+      {Key? key, required this.client, required this.socket})
+      : super(key: key);
+  final WebSocket socket;
+  final HttpClient client;
+
+  @override
+  ConsumerState<VISServerConnectedWidget> createState() =>
+      _VISServerConnectedWidgetState();
+}
+
+class _VISServerConnectedWidgetState
+    extends ConsumerState<VISServerConnectedWidget> {
+  late Timer _timer;
+
+  void _updateSocket() {
+    ref.read(VISServerSocketProvider.notifier).update(widget.socket);
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    VISS.init(widget.socket, ref);
+    Future.delayed(Duration.zero, () => _updateSocket());
+    _timer = Timer.periodic(const Duration(seconds: 2), (timer) {
+      if (widget.socket.readyState == 3) {
+        ref.refresh(sockConnectprovider(widget.client));
+      }
+    });
+    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+      widget.socket.listen(
+        (data) {
+          VISS.parseData(ref, data);
+        },
+        onError: (e, stk) {
+          print(e.toString());
+          ref.refresh(sockConnectprovider(widget.client));
+        },
+      );
+    });
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    _timer.cancel();
+    widget.socket.close(786887, "Connection lost with server!");
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container();
+  }
+}