feat(settings): версия приложения, секретное меню разработчика и перетаскиваемый FPS-оверлей

2026-04-05 21:36:21 +03:00
parent 279bb87e6a
commit cd5fdcf2c5
3 changed files with 258 additions and 2 deletions
@@ -0,0 +1,145 @@
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
+
+class FpsOverlayLayer extends StatefulWidget {
+  const FpsOverlayLayer({super.key});
+
+  @override
+  State<FpsOverlayLayer> createState() => _FpsOverlayLayerState();
+}
+
+class _FpsOverlayLayerState extends State<FpsOverlayLayer> {
+  static const int _maxSamples = 90;
+  static const int _minUiRefreshMs = 160;
+  static const double _initialWidthGuess = 96;
+  static const double _initialHeightGuess = 36;
+
+  final List<int> _frameMicros = <int>[];
+  final GlobalKey _badgeKey = GlobalKey();
+  double _fps = 0;
+  DateTime _lastUiUpdate = DateTime.fromMillisecondsSinceEpoch(0);
+  double? _left;
+  double? _top;
+
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addTimingsCallback(_onTimings);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeTimingsCallback(_onTimings);
+    super.dispose();
+  }
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    if (_left != null && _top != null) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (mounted) {
+          setState(_clampPositionToScreen);
+        }
+      });
+    }
+  }
+
+  void _ensureInitialPosition() {
+    if (_left != null) return;
+    final mq = MediaQuery.of(context);
+    final w = mq.size.width;
+    _left = w - _initialWidthGuess - 8;
+    _top = mq.padding.top + 8;
+  }
+
+  void _clampPositionToScreen() {
+    if (_left == null || _top == null) return;
+    final mq = MediaQuery.of(context);
+    final screen = mq.size;
+    final topMin = mq.padding.top;
+    final bottomMax = screen.height - mq.padding.bottom;
+
+    final box = _badgeKey.currentContext?.findRenderObject() as RenderBox?;
+    final bw = box?.hasSize == true
+        ? box!.size.width
+        : _initialWidthGuess;
+    final bh = box?.hasSize == true
+        ? box!.size.height
+        : _initialHeightGuess;
+
+    _left = _left!.clamp(0.0, math.max(0.0, screen.width - bw));
+    _top = _top!.clamp(topMin, math.max(topMin, bottomMax - bh));
+  }
+
+  void _onTimings(List<FrameTiming> timings) {
+    for (final t in timings) {
+      final us = t.totalSpan.inMicroseconds;
+      if (us <= 0) continue;
+      _frameMicros.add(us);
+      while (_frameMicros.length > _maxSamples) {
+        _frameMicros.removeAt(0);
+      }
+    }
+    final now = DateTime.now();
+    if (now.difference(_lastUiUpdate).inMilliseconds < _minUiRefreshMs) {
+      return;
+    }
+    _lastUiUpdate = now;
+    if (!mounted || _frameMicros.isEmpty) return;
+    final sum = _frameMicros.fold<int>(0, (a, b) => a + b);
+    final avg = sum / _frameMicros.length;
+    final fps = avg > 0 ? (1000000.0 / avg).clamp(0.0, 999.0) : 0.0;
+    setState(() => _fps = fps);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    _ensureInitialPosition();
+    _clampPositionToScreen();
+
+    return Positioned(
+      left: _left,
+      top: _top,
+      child: MouseRegion(
+        cursor: SystemMouseCursors.move,
+        child: GestureDetector(
+          behavior: HitTestBehavior.opaque,
+          onPanUpdate: (details) {
+            setState(() {
+              _left = _left! + details.delta.dx;
+              _top = _top! + details.delta.dy;
+              _clampPositionToScreen();
+            });
+          },
+          child: Material(
+            key: _badgeKey,
+            color: Colors.transparent,
+            child: Container(
+              padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+              decoration: BoxDecoration(
+                color: const Color(0xCC000000),
+                borderRadius: BorderRadius.circular(8),
+              ),
+              child: Text(
+                '${_fps.round()} FPS',
+                style: TextStyle(
+                  color: _fps >= 55
+                      ? const Color(0xFFB8F5C6)
+                      : _fps >= 30
+                      ? const Color(0xFFFFE082)
+                      : const Color(0xFFFFAB91),
+                  fontSize: 13,
+                  fontWeight: FontWeight.w600,
+                  fontFeatures: const [FontFeature.tabularFigures()],
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}