Add connecting and disconnecting states to BleConnectionState (#54)

* Add connecting and disconnecting state

* Replace BleConnectionState with boolean in onConnectionChanged callback

* Improve Docs and Changelog

* Implement GetConnectionState in Windows

* Update CHANGELOG.md

Co-authored-by: Foti Dim <foti@navideck.com>

* Add  code level doc of connectionState getter

---------

Co-authored-by: Foti Dim <foti@navideck.com>

example/lib/data/mock_universal_ble.dart

@@ -31,12 +31,12 @@ class MockUniversalBle extends UniversalBlePlatform {
 
   @override
   Future<void> connect(String deviceId, {Duration? connectionTimeout}) async {
-    onConnectionChange?.call(deviceId, BleConnectionState.connected);
+    onConnectionChange?.call(deviceId, true);
   }
 
   @override
   Future<void> disconnect(String deviceId) async {
-    onConnectionChange?.call(deviceId, BleConnectionState.disconnected);
+    onConnectionChange?.call(deviceId, false);
   }
 
   @override
@@ -105,7 +105,7 @@ class MockUniversalBle extends UniversalBlePlatform {
   }
 
   @override
-  Future<bool> isConnected(String deviceId) {
+  Future<BleConnectionState> getConnectionState(String deviceId) {
     throw UnimplementedError();
   }
 }

example/lib/peripheral_details/peripheral_detail_page.dart

@@ -62,16 +62,16 @@ class _PeripheralDetailPageState extends State<PeripheralDetailPage> {
     });
   }
 
-  void _handleConnectionChange(String deviceId, BleConnectionState state) {
-    print('_handleConnectionChange $deviceId, ${state.name}');
+  void _handleConnectionChange(String deviceId, bool isConnected) {
+    print('_handleConnectionChange $deviceId, $isConnected');
     setState(() {
       if (deviceId == widget.deviceId) {
-        isConnected = (state == BleConnectionState.connected);
+        this.isConnected = isConnected;
       }
     });
-    _addLog('Connection', state.name.toUpperCase());
+    _addLog('Connection', isConnected ? "Connected" : "Disconnected");
     // Auto Discover Services
-    if (isConnected) {
+    if (this.isConnected) {
       _discoverServices();
     }
   }
@@ -347,13 +347,13 @@ class _PeripheralDetailPageState extends State<PeripheralDetailPage> {
                             PlatformButton(
                               onPressed: () async {
                                 _addLog(
-                                  'IsConnected',
-                                  await UniversalBle.isConnected(
+                                  'ConnectionState',
+                                  await UniversalBle.getConnectionState(
                                     widget.deviceId,
                                   ),
                                 );
                               },
-                              text: 'IsConnected',
+                              text: 'Connection State',
                             ),
                             if (Capabilities.supportsRequestMtuApi)
                               PlatformButton(

example/pubspec.lock

@@ -410,7 +410,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.9.12"
+    version: "0.10.0"
   vector_math:
     dependency: transitive
     description: