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2026-02-07 13:01:32 +01:00
parent 9df3da17ae
commit fc6ae39a53
7 changed files with 448 additions and 103 deletions
@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+
+/// Wraps [child] and briefly highlights it when [trigger] changes.
+/// Uses a semi-opaque overlay that fades to transparent over ~300ms.
+class FlashOnUpdateWidget extends StatelessWidget {
+  const FlashOnUpdateWidget({
+    super.key,
+    required this.trigger,
+    required this.child,
+    this.highlightColor,
+  });
+
+  /// When this value changes, the flash animation runs once.
+  final Object trigger;
+
+  final Widget child;
+
+  /// If null, [Theme.colorScheme.primaryContainer] is used with opacity.
+  final Color? highlightColor;
+
+  @override
+  Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+    final color = highlightColor ??
+        colorScheme.primaryContainer.withValues(alpha: 0.6);
+
+    return TweenAnimationBuilder<double>(
+      key: ValueKey(trigger),
+      tween: Tween<double>(begin: 1, end: 0),
+      duration: const Duration(milliseconds: 300),
+      builder: (context, value, childWidget) {
+        return Stack(
+          children: [
+            childWidget!,
+            if (value > 0)
+              Positioned.fill(
+                child: IgnorePointer(
+                  child: Container(
+                    color: color.withValues(alpha: value * 0.6),
+                  ),
+                ),
+              ),
+          ],
+        );
+      },
+      child: child,
+    );
+  }
+}