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main.dart
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main.dart
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import 'package:flutter/material.dart';
import 'package:signalr_socket/signalr_socket.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
SignalrSocketConnectionStatus connectionStatus = SignalrSocketConnectionStatus.disconnected;
late SignalrSocket signalrSocket;
List<String> outputs = [];
ScrollController outputScrollController = ScrollController();
@override
void initState() {
signalrSocket = SignalrSocket(
url: "http://localhost:8080/signalr",
hubName: "SignalrSocketHub",
eventName: "SignalrSocketEvent",
queryString: {'key': 'value'},
updateConnectionStatus: (connectionStatus) {
debugPrint("signalr socket update connection status ${connectionStatus.name}");
setState(() {
this.connectionStatus = connectionStatus;
});
},
newMessage: newMessage,
);
super.initState();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('SignalR Socket Example'),
),
body: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Center(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Text(connectionStatus.name, style: const TextStyle(fontWeight: FontWeight.bold)),
),
),
Center(
child: ElevatedButton(
onPressed: () {
signalrSocket.connect();
},
style: ElevatedButton.styleFrom(backgroundColor: Colors.green, foregroundColor: Colors.white),
child: const Text("Connect"),
),
),
const SizedBox(height: 16),
Center(
child: ElevatedButton(
onPressed: () {
signalrSocket.disconnect();
},
style: ElevatedButton.styleFrom(backgroundColor: Colors.red, foregroundColor: Colors.white),
child: const Text("Disconnect"),
),
),
const Padding(
padding: EdgeInsets.only(left: 16, top: 16),
child: Text("Output:"),
),
Expanded(
child: Scrollbar(
controller: outputScrollController,
thumbVisibility: true,
child: ListView.builder(
controller: outputScrollController,
itemCount: outputs.length,
itemBuilder: (context, index) {
final output = outputs[index];
return Padding(
padding: const EdgeInsets.only(left: 8, right: 8),
child: Card(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text(output),
),
),
);
},
),
),
),
Padding(
padding: const EdgeInsets.only(left: 16, right: 16),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
IconButton(
onPressed: () {
outputScrollController.animateTo(
outputScrollController.position.minScrollExtent,
duration: const Duration(milliseconds: 100),
curve: Curves.easeOut,
);
},
icon: const Icon(Icons.arrow_circle_up),
),
IconButton(
onPressed: () {
setState(() {
outputs = [];
});
},
icon: const Icon(Icons.clear_all),
),
IconButton(
onPressed: () {
outputScrollController.animateTo(
outputScrollController.position.maxScrollExtent,
duration: const Duration(milliseconds: 100),
curve: Curves.easeOut,
);
},
icon: const Icon(Icons.arrow_circle_down),
)
],
),
)
],
),
),
);
}
newMessage(dynamic message) {
setState(() {
outputs.add(message.toString());
});
}
}