gomix_flutter/lib/port_connection_card.dart

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),
                    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)),
          ],
        )
      ],
    );
  }
}