Made build portable

dependencies/fluent_ui-3.12.0/lib/src/styles/mica.dart

@@ -0,0 +1,74 @@
+import 'package:fluent_ui/fluent_ui.dart';
+
+/// Mica is an opaque, dynamic material that incorporates theme
+/// and desktop wallpaper to paint the background of long-lived
+/// windows such as apps and settings. You can apply Mica to your
+/// application backdrop to delight users and create visual hierarchy,
+/// aiding productivity, by increasing clarity about which window
+/// is in focus.
+///
+/// See also:
+///
+///  * [Acrylic], a type of Brush that creates a translucent texture
+///  * <https://docs.microsoft.com/en-us/windows/apps/design/style/mica>
+class Mica extends StatelessWidget {
+  /// Creates the Mica material.
+  ///
+  /// [elevation] must be non-negative.
+  const Mica({
+    Key? key,
+    required this.child,
+    this.elevation = 0,
+    this.backgroundColor,
+    this.borderRadius,
+    this.shape = BoxShape.rectangle,
+  })  : assert(elevation >= 0.0),
+        super(key: key);
+
+  /// The widget below this widget in the tree.
+  ///
+  /// {@macro flutter.widgets.ProxyWidget.child}
+  final Widget child;
+
+  /// The z-coordinate relative to the parent at which to place this physical
+  /// object.
+  ///
+  /// The value is non-negative.
+  final double elevation;
+
+  /// The color to paint the background area with. If null,
+  /// [ThemeData.micaBackgroundColor] is used.
+  final Color? backgroundColor;
+
+  /// The border radius applied to the area.
+  final BorderRadius? borderRadius;
+
+  /// The box shape applied to the area.
+  /// By default, the value of shape is [BoxShape.rectangle]
+  final BoxShape shape;
+
+  @override
+  Widget build(BuildContext context) {
+    assert(debugCheckHasFluentTheme(context));
+    final ThemeData theme = FluentTheme.of(context);
+    final Color boxColor = backgroundColor ?? theme.micaBackgroundColor;
+    final Widget result = DecoratedBox(
+      decoration: BoxDecoration(
+        color: boxColor,
+        borderRadius: borderRadius,
+        shape: shape,
+      ),
+      child: child,
+    );
+    if (elevation > 0.0) {
+      return PhysicalModel(
+        color: boxColor,
+        elevation: elevation,
+        borderRadius: borderRadius,
+        shape: shape,
+        child: result,
+      );
+    }
+    return result;
+  }
+}