Separate floor and ceiling into widgets with painters

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/main.dart

@@ -557,27 +557,33 @@ class Background extends StatelessWidget {
     super.key,
   });
 
+  @override
+  Widget build(BuildContext context) {
+    return const Stack(
+      textDirection: TextDirection.ltr,
+      children: [
+        Ceiling(),
+        Floor(),
+      ],
+    );
+  }
+}
+
+class Ceiling extends StatelessWidget {
+  const new({super.key});
+
   @override
   Widget build(BuildContext context) {
     return LayoutBuilder(
-      builder: (context, constraints) => Stack(
+      builder: (context, constraints) => CustomPaint(
-        textDirection: TextDirection.ltr,
+        size: constraints.biggest,
-        children: [
+        painter: CeilingPainter(),
-          CustomPaint(
-            size: constraints.biggest,
-            painter: Ceiling(),
-          ),
-          CustomPaint(
-            size: constraints.biggest,
-            painter: Floor(),
-          ),
-        ],
       ),
     );
   }
 }
 
-class Ceiling extends CustomPainter {
+class CeilingPainter extends CustomPainter {
   @override
   void paint(Canvas canvas, Size size) {
     final Rect rect = Offset.zero & size;
@@ -610,7 +616,21 @@ class Ceiling extends CustomPainter {
   bool shouldRebuildSemantics(covariant oldDelegate) => false;
 }
 
-class Floor extends CustomPainter {
+class Floor extends StatelessWidget {
+  const new({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) => CustomPaint(
+        size: constraints.biggest,
+        painter: FloorPainter(),
+      ),
+    );
+  }
+}
+
+class FloorPainter extends CustomPainter {
   @override
   void paint(Canvas canvas, Size size) {
     final Rect rect = Offset.zero & size;