Enhance getSystemDevice API on macOS with Broader Default Services Fi… (#121)

* Enhance getSystemDevice API on macOS with Broader Default Services Filter

* Update docs

* Update darwin/Classes/UniversalBlePlugin.swift

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

* Reorder fields

* Use ScanFilter ui for getting system devices

---------

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

example/lib/home/home.dart

@@ -71,6 +71,19 @@ class _MyAppState extends State<MyApp> {
     );
   }
 
+  Future<void> _getSystemDevices() async {
+    List<BleDevice> devices = await UniversalBle.getSystemDevices(
+      withServices: scanFilter?.withServices,
+    );
+    if (devices.isEmpty) {
+      showSnackbar("No Connected Devices Found");
+    }
+    setState(() {
+      _bleDevices.clear();
+      _bleDevices.addAll(devices);
+    });
+  }
+
   void _showScanFilterBottomSheet() {
     showModalBottomSheet(
       isScrollControlled: true,
@@ -179,17 +192,7 @@ class _MyAppState extends State<MyApp> {
                 if (BleCapabilities.supportsConnectedDevicesApi)
                   PlatformButton(
                     text: 'Connected Devices',
-                    onPressed: () async {
-                      List<BleDevice> devices =
-                          await UniversalBle.getSystemDevices();
-                      if (devices.isEmpty) {
-                        showSnackbar("No Connected Devices Found");
-                      }
-                      setState(() {
-                        _bleDevices.clear();
-                        _bleDevices.addAll(devices);
-                      });
-                    },
+                    onPressed: _getSystemDevices,
                   ),
                 PlatformButton(
                   text: 'Queue: ${_queueType.name}',

example/lib/home/widgets/scan_filter_widget.dart

@@ -115,19 +115,19 @@ class _ScanFilterWidgetState extends State<ScanFilterWidget> {
           const Divider(),
           const SizedBox(height: 10),
           TextFormField(
-            controller: widget.servicesFilterController,
+            controller: widget.namePrefixController,
             maxLines: 2,
             decoration: const InputDecoration(
-              labelText: "Services",
+              labelText: "Name Prefixes",
               border: OutlineInputBorder(),
             ),
           ),
           const SizedBox(height: 10),
           TextFormField(
-            controller: widget.namePrefixController,
+            controller: widget.servicesFilterController,
             maxLines: 2,
             decoration: const InputDecoration(
-              labelText: "Name Prefixes",
+              labelText: "Services",
               border: OutlineInputBorder(),
             ),
           ),