Refactor: Optimize code and improve safety checks

example/pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^3.0.1
 
 flutter:
-
-  uses-material-design: true
+  uses-material-design: true

lib/src/custom_border_paint.dart

@@ -39,5 +39,9 @@ class CustomBorderPaint extends CustomPainter {
   }
 
   @override
-  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
+  bool shouldRepaint(covariant CustomBorderPaint oldDelegate) {
+    return oldDelegate.thickness != thickness ||
+        oldDelegate.radius != radius ||
+        oldDelegate.gradient != gradient;
+  }
 }

lib/src/row_to_column.dart

@@ -22,22 +22,21 @@ class RowToColumn extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ((isColumnToRow ?? false) ? isVertical : !isVertical)
+    final bool isRow = (isColumnToRow ?? false) ? isVertical : !isVertical;
+    final Widget layout = isRow
         ? Row(
-            mainAxisAlignment:
-                mainAxisAlignment ?? const Row().mainAxisAlignment,
-            mainAxisSize: mainAxisSize ?? const Row().mainAxisSize,
-            crossAxisAlignment:
-                crossAxisAlignment ?? const Row().crossAxisAlignment,
+            mainAxisAlignment: mainAxisAlignment ?? MainAxisAlignment.start,
+            mainAxisSize: mainAxisSize ?? MainAxisSize.max,
+            crossAxisAlignment: crossAxisAlignment ?? CrossAxisAlignment.center,
             children: children,
           )
         : Column(
-            mainAxisAlignment:
-                mainAxisAlignment ?? const Column().mainAxisAlignment,
-            mainAxisSize: mainAxisSize ?? const Column().mainAxisSize,
-            crossAxisAlignment:
-                crossAxisAlignment ?? const Column().crossAxisAlignment,
+            mainAxisAlignment: mainAxisAlignment ?? MainAxisAlignment.start,
+            mainAxisSize: mainAxisSize ?? MainAxisSize.max,
+            crossAxisAlignment: crossAxisAlignment ?? CrossAxisAlignment.center,
             children: children,
           );
+
+    return layout;
   }
 }

lib/src/utils.dart

@@ -9,21 +9,26 @@ class Utils {
       required int totalSwitches,
       List<double>? customWidths,
       required double minWidth}) {
+    assert(index >= 0 && totalSwitches > 0);
+    assert(minWidth > 0);
+
+    if (customWidths != null && index < customWidths.length) {
+      return customWidths[index];
+    }
+
     /// Extra width to prevent overflow and add padding
     double extraWidth = 0.10 * totalSwitches;
 
     /// Max screen width
     double screenWidth = MediaQuery.of(context).size.width;
 
     /// Returns width per label
-    ///
+    ///s
     /// Returns passed minWidth per label if total requested width plus extra width is less than max screen width.
     /// Returns calculated width to fit within the max screen width if total requested width plus extra width is more than max screen width.
-    return customWidths != null
-        ? customWidths[index]
-        : ((totalSwitches + extraWidth) * minWidth < screenWidth
-            ? minWidth
-            : screenWidth / (totalSwitches + extraWidth));
+    return ((totalSwitches + extraWidth) * minWidth < screenWidth)
+        ? minWidth
+        : screenWidth / (totalSwitches + extraWidth);
   }
 
   /// Ignores customHeights if toggle switch is horizontal