SamJakob · October 4, 2023 04:42 · Oct 4, 2023
diff --git a/PreferredSizedBox.dart b/PreferredSizedBox.dart
@@ -0,0 +1,19 @@
+/// This class extends [SizedBox] whilst implementing [PreferredSizeWidget]
+/// based on the defined size. This allows the use of [SizedBox] in places
+/// where [PreferredSizeWidget] is required, such as in [AppBar.preferredSize].
+class PreferredSizedBox extends SizedBox implements PreferredSizeWidget {
+  const PreferredSizedBox({super.key});
+
+  const PreferredSizedBox.shrink({super.key, super.child}) : super.shrink();
+  const PreferredSizedBox.expand({super.key, super.child}) : super.expand();
+  PreferredSizedBox.fromSize({super.key, super.child, super.size})
+      : super.fromSize();
+  const PreferredSizedBox.square({super.key, super.child, super.dimension})
+      : super.square();
+
+  @override
+  Size get preferredSize => Size(
+        width ?? double.infinity,
+        height ?? double.infinity,
+      );
+}