🐛 Fix balance value not being of type double

Implements:
- Viewing connections (routes)
- Creating and deleting connections
- Changing volume of connectons
- Muting / unmuting connections

LICENSE

@@ -0,0 +1,621 @@
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS

README.md

@@ -1,3 +1,15 @@
 # gomix_flutter
 
-A client application for the go-mix backend written in Flutter.
+Gomix_flutter is a client application for the [go-mix](https://gitlab.minie4.de/minie4/go-mix) audio mixer written in Flutter. It provides a graphical user interface to control the go-mix backend.
+
+## 📦 Building
+
+To buld `gomix_flutter`, make sure you have a working installation of Flutter installed on your machine which is configured to build for the the desired target.
+
+Then run the following command to build `gomix_flutter` for a specific target:
+
+```bash
+$ flutter build [target]
+```
+
+For more information about building a flutter application for a specific platform refer to the [Flutter Documentation](https://docs.flutter.dev/deployment).

lib/main.dart

@@ -9,6 +9,7 @@ import 'package:gomix_flutter/mixing_tab.dart';
 import 'package:gomix_flutter/ports_tab.dart';
 import 'package:gomix_flutter/settings_tab.dart';
 import 'package:gomix_flutter/error_page.dart';
+import 'package:gomix_flutter/utils.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:web_socket_channel/web_socket_channel.dart';
 
@@ -28,10 +29,15 @@ class GoMixClient extends StatelessWidget {
           showValueIndicator: ShowValueIndicator.always,
         ),
       ),
-      // darkTheme: ThemeData(
+      darkTheme: ThemeData(
-      //     useMaterial3: true,
+        useMaterial3: true,
-      //     colorScheme: ColorScheme.fromSeed(
+        colorScheme: ColorScheme.fromSeed(
-      //         seedColor: Colors.greenAccent, brightness: Brightness.dark)),
+            seedColor: Colors.greenAccent, brightness: Brightness.dark),
+        sliderTheme: const SliderThemeData(
+          showValueIndicator: ShowValueIndicator.always,
+        ),
+      ),
+      themeMode: ThemeMode.system,
       home: const GoMixHome(),
     );
   }
@@ -57,6 +63,10 @@ class _GoMixHomeState extends State<GoMixHome> {
   ValueNotifier<String> connectionError = ValueNotifier("");
 
   void initWs() {
+    if (wsConnected) {
+      ws?.sink.close(1000, "disconnect before initWs");
+    }
+
     setState(() {
       connectionError.value = "";
       wsConnected = false;
@@ -97,17 +107,15 @@ class _GoMixHomeState extends State<GoMixHome> {
       }
       // Update a single port
       if (data["type"] == "portChange") {
-        int index = mixerState.inputs.indexWhere(
-            (element) => element.uuid == data["responseData"]["UUID"]);
-        int index2 = mixerState.outputs.indexWhere(
-            (element) => element.uuid == data["responseData"]["UUID"]);
-
         mixer.Port newPort = mixer.Port.fromJson(data["responseData"]);
         setState(() {
-          if (index >= 0) {
+          mixer.Port? affectedPort =
-            mixerState.inputs[index] = newPort;
+              findPort(mixerState, data["responseData"]["UUID"]);
-          } else if (index2 >= 0) {
+          if (affectedPort != null) {
-            mixerState.outputs[index2] = newPort;
+            affectedPort.name = newPort.name;
+            affectedPort.state = newPort.state;
+            affectedPort.properties = newPort.properties;
+            affectedPort.route = newPort.route;
           }
         });
       }
@@ -138,6 +146,7 @@ class _GoMixHomeState extends State<GoMixHome> {
       wsConnected = false;
       if (connectionError.value != "") return;
       Future.delayed(const Duration(seconds: 2), () {
+        if (wsConnected) return;
         initWs();
       });
     }, onError: (err) {
@@ -217,7 +226,9 @@ class _GoMixHomeState extends State<GoMixHome> {
                       icon: const Icon(Icons.remove_circle_outline_outlined),
                       color: Colors.red,
                       tooltip: 'Not connected',
-                      onPressed: () {},
+                      onPressed: () {
+                        initWs();
+                      },
                     ),
               actions: <Widget>[
                 Padding(

lib/mixer_state.dart

@@ -83,7 +83,7 @@ class State {
   String? toUuid;
   bool mute;
   double volume;
-  int balance;
+  double balance;
 
   State({
     this.toUuid,
@@ -96,7 +96,7 @@ class State {
         toUuid: json["toUUID"],
         mute: json["mute"],
         volume: json["volume"]?.toDouble(),
-        balance: json["balance"],
+        balance: json["balance"]?.toDouble(),
       );
 
   Map<String, dynamic> toJson() => {

lib/mixing_card.dart

@@ -1,13 +1,17 @@
 import 'package:flutter/material.dart';
 import 'package:gomix_flutter/mixer_state.dart' as mixer;
+import 'package:gomix_flutter/port_connection_dialog.dart';
+import 'package:gomix_flutter/utils.dart';
 
 class MixingCard extends StatefulWidget {
   final mixer.Port port;
-  final Function sendAction;
+  final mixer.MixerState mixerState;
+  final Function(Map<String, Object> data) sendAction;
   final bool isOutput;
   const MixingCard(
       {super.key,
       required this.port,
+      required this.mixerState,
       required this.sendAction,
       this.isOutput = false});
 
@@ -15,20 +19,55 @@ class MixingCard extends StatefulWidget {
   State<MixingCard> createState() => _MixingCardState();
 }
 
+class DialogDataModel extends ChangeNotifier {
+  String? portUUID;
+
+  late mixer.MixerState mixerState;
+  late mixer.Port port;
+
+  void updatePort(bool force) {
+    if (portUUID == null) {
+      return;
+    }
+    // Only update port reference if it is actually outdated
+    if (force ||
+        (!mixerState.inputs.contains(port) &&
+            !mixerState.outputs.contains(port))) {
+      mixer.Port? newPort = findPort(mixerState, portUUID!);
+      if (newPort != null) port = newPort;
+    }
+  }
+
+  void setPortUUID(String uuid) {
+    portUUID = uuid;
+    updatePort(true);
+  }
+
+  void setMixerState(mixer.MixerState state) {
+    mixerState = state;
+    updatePort(false);
+    notifyListeners();
+  }
+}
+
 class _MixingCardState extends State<MixingCard> {
   double _sliderValue = 0;
   int _debounceTimer = 0;
   bool _sliderActive = false;
 
+  DialogDataModel dataModel = DialogDataModel();
+
   @override
   void initState() {
     super.initState();
+    dataModel.setMixerState(widget.mixerState);
     _sliderValue = widget.port.state.volume;
   }
 
   @override
   void didUpdateWidget(MixingCard oldWidget) {
     if (_sliderActive) return;
+    dataModel.setMixerState(widget.mixerState);
     _sliderValue = widget.port.state.volume;
     super.didUpdateWidget(oldWidget);
   }
@@ -78,7 +117,16 @@ class _MixingCardState extends State<MixingCard> {
                     child: IconButton.outlined(
                         iconSize: 20,
                         isSelected: false,
-                        onPressed: () {},
+                        onPressed: () {
+                          dataModel.setPortUUID(widget.port.uuid);
+                          PortConnectionDialog(
+                                  sendAction: widget.sendAction,
+                                  port: widget.port,
+                                  isOutput: widget.isOutput,
+                                  dataModel: dataModel,
+                                  mixerState: widget.mixerState)
+                              .show(context);
+                        },
                         icon: const Icon(Icons.unfold_more)))
               ],
             ),
@@ -90,6 +138,7 @@ class _MixingCardState extends State<MixingCard> {
               min: 0,
               max: 4,
               label: _sliderValue.toStringAsFixed(2),
+              allowedInteraction: SliderInteraction.slideThumb,
               onChangeStart: ((val) {
                 _sliderActive = true;
               }),

lib/mixing_tab.dart

@@ -27,6 +27,7 @@ class _MixingTabState extends State<MixingTab> {
                 port: p,
                 sendAction: widget.sendAction,
                 isOutput: isOutput,
+                mixerState: widget.mixerState,
               ))
           .toList(),
     );

lib/port_connection_card.dart

@@ -0,0 +1,136 @@
+import 'package:flutter/material.dart';
+import 'package:gomix_flutter/mixer_state.dart' as mixer;
+
+class PortConnectionCard extends StatefulWidget {
+  final mixer.Port sourcePort;
+  final mixer.State connection;
+  final mixer.MixerState mixerState;
+  final Function(Map<String, Object> data) sendAction;
+  final bool isOutput;
+  const PortConnectionCard(
+      {super.key,
+      required this.sourcePort,
+      required this.connection,
+      required this.mixerState,
+      required this.sendAction,
+      required this.isOutput});
+
+  @override
+  State<PortConnectionCard> createState() => _PortConnectionCardState();
+}
+
+class _PortConnectionCardState extends State<PortConnectionCard> {
+  double _sliderValue = 0;
+  int _debounceTimer = 0;
+  bool _sliderActive = false;
+
+  String toUUID = "";
+  String portName = "";
+  void updatePortData() {
+    toUUID = widget.connection.toUuid ?? "";
+    mixer.Port toPort = widget.mixerState.outputs.firstWhere(
+        (el) => el.uuid == toUUID,
+        orElse: () => mixer.Port(
+            name: "Invalid Port",
+            properties: mixer.Properties(backend: "N/A", channels: 0),
+            state: mixer.State(balance: 1, mute: true, volume: 0),
+            uuid: toUUID,
+            route: []));
+    portName = widget.isOutput ? widget.sourcePort.name : toPort.name;
+  }
+
+  @override
+  void initState() {
+    _sliderValue = widget.connection.volume;
+    updatePortData();
+    super.initState();
+  }
+
+  @override
+  void didUpdateWidget(PortConnectionCard oldWidget) {
+    if (_sliderActive) return;
+    _sliderValue = widget.connection.volume;
+    super.didUpdateWidget(oldWidget);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Text(portName),
+        Row(
+          children: [
+            Expanded(
+                child: Slider(
+                    min: 0,
+                    max: 4,
+                    value: _sliderValue,
+                    label: _sliderValue.toStringAsFixed(2),
+                    allowedInteraction: SliderInteraction.slideThumb,
+                    onChangeStart: ((val) {
+                      _sliderActive = true;
+                    }),
+                    onChangeEnd: ((val) {
+                      // Send the current state to make sure we
+                      // don't miss the last value due to the debounce
+                      widget.sendAction({
+                        "method": "setRouteState",
+                        "UUID": widget.sourcePort.uuid,
+                        "toUUID": widget.connection.toUuid ?? "",
+                        "routeStateData": {"volume": val}
+                      });
+                      // Make sure the slider value is still correct
+                      // after suppressing updates
+                      _sliderActive = false;
+                      setState(() {
+                        _sliderValue = widget.connection.volume;
+                      });
+                    }),
+                    onChanged: (val) {
+                      setState(() {
+                        _sliderValue = val;
+                      });
+                      if (DateTime.now().millisecondsSinceEpoch -
+                              _debounceTimer <
+                          30) {
+                        return;
+                      }
+                      _debounceTimer = DateTime.now().millisecondsSinceEpoch;
+                      widget.sendAction({
+                        "method": "setRouteState",
+                        "UUID": widget.sourcePort.uuid,
+                        "toUUID": widget.connection.toUuid ?? "",
+                        "routeStateData": {"volume": val}
+                      });
+                    })),
+            IconButton.filledTonal(
+                onPressed: () {
+                  widget.sendAction({
+                    "method": "setRouteState",
+                    "UUID": widget.sourcePort.uuid,
+                    "toUUID": widget.connection.toUuid ?? "",
+                    "routeStateData": {"mute": !widget.connection.mute}
+                  });
+                },
+                iconSize: 20,
+                icon: widget.connection.mute
+                    ? const Icon(Icons.volume_off_outlined)
+                    : const Icon(Icons.volume_up_outlined)),
+            const SizedBox(width: 5),
+            IconButton.filled(
+                onPressed: () {
+                  widget.sendAction({
+                    "method": "deleteRoute",
+                    "UUID": widget.sourcePort.uuid,
+                    "toUUID": widget.connection.toUuid ?? ""
+                  });
+                },
+                iconSize: 20,
+                icon: const Icon(Icons.delete)),
+          ],
+        )
+      ],
+    );
+  }
+}

lib/port_connection_dialog.dart

@@ -0,0 +1,134 @@
+import 'dart:math';
+import 'package:flutter/material.dart';
+import 'package:gomix_flutter/mixer_state.dart' as mixer;
+import 'package:gomix_flutter/mixing_card.dart';
+import 'package:gomix_flutter/port_connection_card.dart';
+import 'package:gomix_flutter/ports_tab.dart';
+
+class PortConnectionDialog extends StatefulWidget {
+  final Function(Map<String, Object> data) sendAction;
+  final mixer.Port port;
+  final bool isOutput;
+  final DialogDataModel dataModel;
+  final mixer.MixerState mixerState;
+
+  const PortConnectionDialog(
+      {super.key,
+      required this.sendAction,
+      required this.port,
+      required this.dataModel,
+      this.isOutput = false,
+      required this.mixerState});
+
+  void show(BuildContext context) {
+    showDialog<String>(
+      context: context,
+      builder: (BuildContext context) => AlertDialog(
+        title: isOutput
+            ? Text("Inputs > ${port.name}")
+            : Text("${port.name} > Outputs"),
+        content: this,
+      ),
+    );
+  }
+
+  void showNewConnectionDialog(BuildContext context) {
+    showDialog<String>(
+      context: context,
+      builder: (BuildContext context) => AlertDialog(
+        title: const Text("New connection"),
+        content: PortsTab(
+          mixerState: mixerState,
+          sendAction: sendAction,
+          // Can only select outputs if source port is an input and nice versa
+          filter: (_, isOutput) => this.isOutput != isOutput,
+          selectionCallback: (destination) {
+            Navigator.pop(context);
+            sendAction({
+              "method": "createRoute",
+              "UUID": isOutput ? destination.uuid : port.uuid,
+              "routeData": {"to": isOutput ? port.uuid : destination.uuid}
+            });
+          },
+        ),
+      ),
+    );
+  }
+
+  @override
+  State<PortConnectionDialog> createState() => _PortConnectionState();
+}
+
+class _PortConnectionState extends State<PortConnectionDialog> {
+  List<(mixer.Port, mixer.State)> connections = [];
+
+  List<(mixer.Port, mixer.State)> getConnections() {
+    List<(mixer.Port, mixer.State)> connections = [];
+    if (widget.isOutput) {
+      for (mixer.Port input in widget.dataModel.mixerState.inputs) {
+        for (mixer.State connection in input.route) {
+          String toUUID = connection.toUuid ?? "";
+          if (toUUID == widget.port.uuid) connections.add((input, connection));
+        }
+      }
+    } else {
+      connections = widget.dataModel.port.route
+          .map((route) => (widget.port, route))
+          .toList();
+    }
+    return connections;
+  }
+
+  var dataModelListener = () {};
+
+  @override
+  void initState() {
+    super.initState();
+    connections = getConnections();
+
+    dataModelListener = () {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        setState(() {
+          connections = getConnections();
+        });
+      });
+    };
+    widget.dataModel.addListener(dataModelListener);
+  }
+
+  @override
+  void dispose() {
+    widget.dataModel.removeListener(dataModelListener);
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: min(MediaQuery.of(context).size.width, 400),
+      child: SingleChildScrollView(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: (connections
+                  .map((elem) => PortConnectionCard(
+                      sourcePort: elem.$1,
+                      connection: elem.$2,
+                      isOutput: widget.isOutput,
+                      mixerState: widget.mixerState,
+                      sendAction: widget.sendAction) as Widget)
+                  .toList()) +
+              <Widget>[
+                const SizedBox(height: 10),
+                TextButton.icon(
+                    onPressed: () {
+                      widget.showNewConnectionDialog(context);
+                    },
+                    icon: const Icon(Icons.add),
+                    label: const Text("New connection"))
+              ],
+        ),
+      ),
+    );
+  }
+}

lib/ports_tab.dart

@@ -7,8 +7,14 @@ enum MenuAction { edit, delete }
 class PortsTab extends StatefulWidget {
   final mixer.MixerState mixerState;
   final void Function(Map<String, Object> data) sendAction;
+  final bool Function(mixer.Port port, bool isOutput)? filter;
+  final void Function(mixer.Port port)? selectionCallback;
   const PortsTab(
-      {super.key, required this.mixerState, required this.sendAction});
+      {super.key,
+      required this.mixerState,
+      required this.sendAction,
+      this.filter,
+      this.selectionCallback});
 
   @override
   State<PortsTab> createState() => _PortsTabState();
@@ -76,49 +82,55 @@ class _PortsTabState extends State<PortsTab> {
             const SizedBox(height: 10),
             ...[...widget.mixerState.inputs, ...widget.mixerState.outputs]
                 .indexed
-                .where((elem) {
+                .where((elem) => widget.filter != null
-              return elem.$2.name
+                    ? widget.filter!(
-                  .toLowerCase()
+                        elem.$2, (elem.$1 >= widget.mixerState.inputs.length))
-                  .contains(searchText.toLowerCase());
+                    : true)
-            }).map(
+                .where((elem) => elem.$2.name
-              (elem) => Card(
+                    .toLowerCase()
-                child: ListTile(
+                    .contains(searchText.toLowerCase()))
-                  leading: (elem.$1 >= widget.mixerState.inputs.length)
+                .map(
-                      ? const Icon(Icons.speaker_outlined)
+                  (elem) => Card(
-                      : const Icon(Icons.mic_none_outlined),
+                    child: ListTile(
-                  title: Text(elem.$2.name),
+                      leading: (elem.$1 >= widget.mixerState.inputs.length)
-                  subtitle: Text('Backend: ${elem.$2.properties.backend}'),
+                          ? const Icon(Icons.speaker_outlined)
-                  trailing: PopupMenuButton<MenuAction>(
+                          : const Icon(Icons.mic_none_outlined),
-                    tooltip: "More Options",
+                      title: Text(elem.$2.name),
-                    onSelected: (MenuAction item) {
+                      subtitle: Text('Backend: ${elem.$2.properties.backend}'),
-                      switch (item) {
+                      onTap: widget.selectionCallback != null
-                        case MenuAction.edit:
+                          ? () => widget.selectionCallback!(elem.$2)
-                          onEditPort(elem.$2);
+                          : null,
-                        case MenuAction.delete:
+                      trailing: PopupMenuButton<MenuAction>(
-                          onDeletePort(elem.$2);
+                        tooltip: "More Options",
-                      }
+                        onSelected: (MenuAction item) {
-                    },
+                          switch (item) {
-                    itemBuilder: (BuildContext context) =>
+                            case MenuAction.edit:
-                        <PopupMenuEntry<MenuAction>>[
+                              onEditPort(elem.$2);
-                      const PopupMenuItem<MenuAction>(
+                            case MenuAction.delete:
-                        value: MenuAction.edit,
+                              onDeletePort(elem.$2);
-                        child: ListTile(
+                          }
-                          leading: Icon(Icons.mode_edit),
+                        },
-                          title: Text('Edit'),
+                        itemBuilder: (BuildContext context) =>
-                        ),
+                            <PopupMenuEntry<MenuAction>>[
+                          const PopupMenuItem<MenuAction>(
+                            value: MenuAction.edit,
+                            child: ListTile(
+                              leading: Icon(Icons.mode_edit),
+                              title: Text('Edit'),
+                            ),
+                          ),
+                          const PopupMenuItem<MenuAction>(
+                            value: MenuAction.delete,
+                            child: ListTile(
+                              leading: Icon(Icons.delete),
+                              title: Text('Delete'),
+                            ),
+                          ),
+                        ],
                       ),
-                      const PopupMenuItem<MenuAction>(
+                    ),
-                        value: MenuAction.delete,
-                        child: ListTile(
-                          leading: Icon(Icons.delete),
-                          title: Text('Delete'),
-                        ),
-                      ),
-                    ],
                   ),
-                ),
+                )
-              ),
-            )
           ],
         ),
       ),

lib/utils.dart

@@ -0,0 +1,14 @@
+import 'package:gomix_flutter/mixer_state.dart' as mixer;
+
+mixer.Port? findPort(mixer.MixerState mixerState, String uuid) {
+  int index = mixerState.inputs.indexWhere((element) => element.uuid == uuid);
+  if (index >= 0) {
+    return mixerState.inputs[index];
+  }
+  index = mixerState.outputs.indexWhere((element) => element.uuid == uuid);
+  if (index >= 0) {
+    return mixerState.outputs[index];
+  }
+
+  return null;
+}