Initial public commit

lib/ui/common/app_backdrop.dart

@@ -0,0 +1,35 @@
+import 'dart:ui';
+
+import 'package:flutter/foundation.dart';
+import 'package:wonders/common_libs.dart';
+
+class AppBackdrop extends StatelessWidget {
+  const AppBackdrop({
+    Key? key,
+    this.strength = 1,
+    this.child,
+  }) : super(key: key);
+
+  final double strength;
+  final Widget? child;
+
+  @override
+  Widget build(BuildContext context) {
+    final double normalStrength = clampDouble(strength, 0, 1);
+    if (settingsLogic.useBlurs) {
+      return BackdropFilter(
+        filter: ImageFilter.blur(sigmaX: normalStrength * 5.0, sigmaY: normalStrength * 5.0),
+        child: child ?? SizedBox.expand(),
+      );
+    }
+    final fill = Container(color: $styles.colors.black.withOpacity(.8 * strength));
+    return child == null
+        ? fill
+        : Stack(
+            children: [
+              child!,
+              Positioned.fill(child: fill),
+            ],
+          );
+  }
+}