[Flutter] 画面最前面にオーバーレイログを表示

overwrap_logger.dart

import 'package:flutter/widgets.dart';

final _loggerKey = GlobalKey(debugLabel: "OverWrapLogger");

class OverWrapLogger extends StatefulWidget {
  final Widget child;

  OverWrapLogger({
    required this.child,
  }) : super(key: _loggerKey);

  static void writeMethodCall(String name) {
    final state = _loggerKey.currentState;
    if (state is OverWrapLoggerState) {
      state._writeMethodCall(name);
    }
  }

  @override
  State<StatefulWidget> createState() => OverWrapLoggerState();
}

class OverWrapLoggerState extends State<OverWrapLogger> {
  final Map<String, int> _methodCall = {};

  String logText = "";
  void _writeMethodCall(String name) {
    final frames = StackTrace.current.toString().split("\n");
    setState(() {
      final name = frames[3]
          .split(" ")
          .where((element) => element.contains("."))
          .toList()[0];
      _methodCall[name] = (_methodCall[name] ?? 0) + 1;
      logText = _methodCall.entries.map((e) {
        final number = "${e.value}".padLeft(4, '0');
        return "[$number] ${e.key}";
      }).join("\n");
    });
  }

  Widget _build() {
    return IgnorePointer(
      ignoring: true,
      child: Container(
        width: double.infinity,
        height: double.infinity,
        padding: const EdgeInsets.only(
          top: 32,
          left: 8,
          right: 8,
          bottom: 6,
        ),
        color: const Color(0x60000000),
        child: SingleChildScrollView(
          scrollDirection: Axis.vertical,
          child: Text(
            logText,
            textDirection: TextDirection.ltr,
            style: const TextStyle(
              fontSize: 12,
            ),
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Stack(
      alignment: Alignment.center,
      fit: StackFit.expand,
      children: [
        widget.child,
        _build(),
      ],
    );
  }
}