Init repo

lib/widgets/shared/pinch_poster_zoom.dart

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+import 'package:fladder/providers/settings/client_settings_provider.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class PinchPosterZoom extends ConsumerStatefulWidget {
+  final Widget child;
+  final Function(double difference)? scaleDifference;
+  const PinchPosterZoom({required this.child, this.scaleDifference, super.key});
+
+  @override
+  ConsumerState<ConsumerStatefulWidget> createState() => _PinchPosterZoomState();
+}
+
+class _PinchPosterZoomState extends ConsumerState<PinchPosterZoom> {
+  double lastScale = 1.0;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onScaleStart: (details) {
+        lastScale = 1;
+      },
+      onScaleUpdate: (details) {
+        final difference = details.scale - lastScale;
+        if (ref.watch(clientSettingsProvider.select((value) => value.pinchPosterZoom))) {
+          widget.scaleDifference?.call(difference);
+        }
+        lastScale = details.scale;
+      },
+      child: widget.child,
+    );
+  }
+}