3 files changed, 43 insertions, 3 deletions
diff --git a/include/cru/ui/controls/flex_layout.hpp b/include/cru/ui/controls/flex_layout.hpp
index 46c4ea55..128a79b0 100644
--- a/include/cru/ui/controls/flex_layout.hpp
+++ b/include/cru/ui/controls/flex_layout.hpp
@@ -42,9 +42,22 @@ class FlexLayout : public LayoutControl {
   void SetContentMainAlign(FlexMainAlignment value) {
     if (value == GetContentMainAlign()) return;
     render_object_->SetContentMainAlign(value);
-    GetWindow()->InvalidateLayout();
+    if (const auto window = GetWindow()) window->InvalidateLayout();
   }
 
+  FlexDirection GetFlexDirection() const {
+    return render_object_->GetFlexDirection();
+  }
+
+  void SetFlexDirection(FlexDirection direction) {
+    if (direction == GetFlexDirection()) return;
+    render_object_->SetFlexDirection(direction);
+    if (const auto window = GetWindow()) window->InvalidateLayout();
+  }
+
+  FlexChildLayoutData GetChildLayoutData(Control* control);
+  void SetChildLayoutData(Control* control, const FlexChildLayoutData& data);
+
  protected:
   void OnAddChild(Control* child, int position) override;
   void OnRemoveChild(Control* child, int position) override;
diff --git a/include/cru/win/native/platform_id.hpp b/include/cru/win/native/platform_id.hpp
index 4b018d51..e1899ad4 100644
--- a/include/cru/win/native/platform_id.hpp
+++ b/include/cru/win/native/platform_id.hpp
@@ -13,7 +13,7 @@ inline bool IsWindowsResource(NativeResource* resource) {
 
 }  // namespace cru::platform::native::win
 
-#define CRU_PLATFORMID_IMPLEMENT_WIN                             \
-  std::wstring_view GetPlatformId() const override {             \
+#define CRU_PLATFORMID_IMPLEMENT_WIN                      \
+  std::wstring_view GetPlatformId() const override {      \
     return ::cru::platform::native::win::win_platform_id; \
   }
diff --git a/src/ui/controls/flex_layout.cpp b/src/ui/controls/flex_layout.cpp
index 340710cc..bb8e3c14 100644
--- a/src/ui/controls/flex_layout.cpp
+++ b/src/ui/controls/flex_layout.cpp
@@ -14,6 +14,33 @@ render::RenderObject* FlexLayout::GetRenderObject() const {
   return render_object_.get();
 }
 
+FlexChildLayoutData FlexLayout::GetChildLayoutData(Control* control) {
+  const auto& render_objects = render_object_->GetChildren();
+  const auto find_result =
+      std::find(render_objects.cbegin(), render_objects.cend(),
+                control->GetRenderObject());
+  if (find_result == render_objects.cend()) {
+    throw std::logic_error("Control is not a child of FlexLayout.");
+  }
+  int position = find_result - render_objects.cbegin();
+  return *(render_object_->GetChildLayoutData(position));
+}
+
+void FlexLayout::SetChildLayoutData(Control* control,
+                                    const FlexChildLayoutData& data) {
+  const auto& render_objects = render_object_->GetChildren();
+  const auto find_result =
+      std::find(render_objects.cbegin(), render_objects.cend(),
+                control->GetRenderObject());
+  if (find_result == render_objects.cend()) {
+    throw std::logic_error("Control is not a child of FlexLayout.");
+  }
+  int position = find_result - render_objects.cbegin();
+  const auto d = render_object_->GetChildLayoutData(position);
+  *d = data;
+  if (const auto window = GetWindow()) window->InvalidateLayout();
+}
+
 void FlexLayout::OnAddChild(Control* child, int position) {
   render_object_->AddChild(child->GetRenderObject(), position);
 }