Connection status updates and tested connection

lib/main.dart

@@ -8,8 +8,8 @@ void main() {
 }
 
 class MyApp extends StatelessWidget {
-  MyApp({super.key}){
-    NTUtils().connect("10.5.78.2");
+  MyApp({super.key}) {
+    NTUtils().connect("localhost");
   }
 
   // This widget is the root of your application.
@@ -33,7 +33,10 @@ class MyApp extends StatelessWidget {
         //
         // This works for code too, not just values: Most code changes can be
         // tested with just a hot reload.
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue, brightness: Brightness.dark),
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: Colors.blue,
+          brightness: Brightness.dark,
+        ),
       ),
       home: const Dashboard(),
     );

lib/ntutils.dart

@@ -1,7 +1,8 @@
+import "dart:ui";
+
 import "package:nt4/nt4.dart";
 
-class NTUtils{
-
+class NTUtils {
   static final NTUtils _instance = NTUtils._internal();
 
   factory NTUtils() {
@@ -16,27 +17,57 @@ class NTUtils{
 
   final Map<String, NT4Subscription> _nt4Subscriptions = {};
 
-  void connect(String serverAddress){
-    _serverAddress = serverAddress;
-    _isAttemptingToConnect = true;
-    ntClient = NT4Client(serverBaseAddress: serverAddress, onConnect: () { isConnected = true; _isAttemptingToConnect = false; }, onDisconnect: () { isConnected = false; });
+  final List<VoidCallback> connectCallbacks = [];
+  final List<VoidCallback> disconnectCallbacks = [];
+
+  void addConnectCallback(VoidCallback cb) {
+    connectCallbacks.add(cb);
   }
 
-  String connectionStatus(){
-    if(_isAttemptingToConnect){
+  void addDisconnectCallback(VoidCallback cb) {
+    disconnectCallbacks.add(cb);
+  }
+
+  void connect(String serverAddress) {
+    _serverAddress = serverAddress;
+    _isAttemptingToConnect = true;
+    ntClient = NT4Client(
+      serverBaseAddress: serverAddress,
+      onConnect: () {
+        isConnected = true;
+        _isAttemptingToConnect = false;
+
+        for (VoidCallback cb in connectCallbacks) {
+          cb();
+        }
+      },
+      onDisconnect: () {
+        isConnected = false;
+
+        for (VoidCallback cb in disconnectCallbacks) {
+          cb();
+        }
+      },
+    );
+  }
+
+  String connectionStatus() {
+    if (_isAttemptingToConnect) {
       return "Attempting to connect to $_serverAddress";
     }
-    if(isConnected){
+    if (isConnected) {
       return "Connected";
-    }else{
+    } else {
       return "Not Connected";
     }
   }
 
-  NT4Subscription subscribe(String topic){
-    if (!_nt4Subscriptions.containsKey(topic))
-    {
-      NT4Subscription subscrip = ntClient!.subscribe(topic, NT4SubscriptionOptions());
+  NT4Subscription subscribe(String topic) {
+    if (!_nt4Subscriptions.containsKey(topic)) {
+      NT4Subscription subscrip = ntClient!.subscribe(
+        topic,
+        NT4SubscriptionOptions(),
+      );
       _nt4Subscriptions[topic] = subscrip;
     }
 
@@ -45,8 +76,8 @@ class NTUtils{
 
   final Map<String, NT4Topic> _nt4Topics = {};
 
-  NT4Topic getPublicTopic(String topic, String type){
-    if(!_nt4Topics.containsKey(topic)){
+  NT4Topic getPublicTopic(String topic, String type) {
+    if (!_nt4Topics.containsKey(topic)) {
       NT4Topic top = ntClient!.publishNewTopic(topic, type);
       _nt4Topics[topic] = top;
     }
@@ -56,4 +87,3 @@ class NTUtils{
 
   NTUtils._internal();
 }
-

lib/pages/dashboard.dart

@@ -1,12 +1,31 @@
 import 'package:flutter/material.dart';
 import 'package:helm/ntutils.dart';
 import 'package:helm/widgets/base_card.dart';
+import 'package:helm/widgets/posty_results_card.dart';
 import 'package:responsive_grid/responsive_grid.dart';
 import '../widgets/text_card.dart';
 
-class Dashboard extends StatelessWidget {
+class Dashboard extends StatefulWidget {
   const Dashboard({super.key});
 
+  @override
+  State<Dashboard> createState() => _DashboardState();
+}
+
+class _DashboardState extends State<Dashboard> {
+  String connectionState = NTUtils().connectionStatus();
+
+  _DashboardState() {
+    NTUtils().addConnectCallback(updateConnectionState);
+    NTUtils().addDisconnectCallback(updateConnectionState);
+  }
+
+  void updateConnectionState() {
+    setState(() {
+      connectionState = NTUtils().connectionStatus();
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     // This method is rerun every time setState is called, for instance as done
@@ -23,7 +42,7 @@ class Dashboard extends StatelessWidget {
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
         // Here we take the value from the MyHomePage object that was created by
         // the App.build method, and use it to set our appbar title.
-        title: Text("Helm - ${NTUtils().connectionStatus()}"),
+        title: Text("Helm - $connectionState"),
       ),
       body: ResponsiveGridRow(
         children: [
@@ -41,7 +60,10 @@ class Dashboard extends StatelessWidget {
                     children: [
                       ResponsiveGridCol(
                         md: 6,
-                        child: TextCard(cardTitle: "Match State"),
+                        child: TextCard(
+                          cardTitle: "Match State",
+                          ntTopic: "/FMSInfo/StationNumber",
+                        ),
                       ),
                       ResponsiveGridCol(
                         md: 6,
@@ -49,7 +71,7 @@ class Dashboard extends StatelessWidget {
                       ),
                       ResponsiveGridCol(
                         md: 6,
-                        child: TextCard(cardTitle: "Blah Blah"),
+                        child: TextCard(cardTitle: "Robot State"),
                       ),
                     ],
                   ),

lib/widgets/text_card.dart

@@ -24,25 +24,22 @@ class TextCard extends StatefulWidget {
 class _TextCardState extends State<TextCard> {
   String _val = "";
 
-  void setVal( String newVal )
-  {
+  void setVal(String newVal) {
+    setState(() {
       _val = newVal;
+    });
   }
 
   @override
   Widget build(BuildContext context) {
-    if(NTUtils().isConnected){
     NT4Subscription sub = NTUtils().subscribe(widget.ntTopic!);
-      sub.listen( (data) => setVal(data.toString()) );
-    }
+    sub.listen((data) => setVal(data.toString()));
 
     return BaseCard(
       cardTitle: widget.cardTitle,
       width: widget.width,
       height: widget.height,
-      children: [
-        Text(_val)
-      ],
+      children: [Text(_val)],
     );
   }
 }