1 files changed, 4 insertions, 2 deletions
diff --git a/include/cru/ui/Base.hpp b/include/cru/ui/Base.hpp
index db360c07..e99c956f 100644
--- a/include/cru/ui/Base.hpp
+++ b/include/cru/ui/Base.hpp
@@ -62,12 +62,14 @@ namespace internal {
 constexpr int align_start = 0;
 constexpr int align_end = align_start + 1;
 constexpr int align_center = align_end + 1;
+constexpr int align_stretch = align_center + 1;
 }  // namespace internal
 
 enum class Alignment {
   Start = internal::align_start,
   End = internal::align_end,
   Center = internal::align_center,
+  Stretch = internal::align_stretch
 };
 
 struct CornerRadius {
@@ -144,7 +146,7 @@ struct FlexChildLayoutData {
 };
 
 struct StackChildLayoutData {
-  Alignment horizontal = Alignment::Start;
-  Alignment vertical = Alignment::Start;
+  std::optional<Alignment> horizontal;
+  std::optional<Alignment> vertical;
 };
 }  // namespace cru::ui