2 files changed, 22 insertions, 0 deletions
diff --git a/include/cru/ui/render/CanvasRenderObject.h b/include/cru/ui/render/CanvasRenderObject.h
index 8343a5f5..2488dc91 100644
--- a/include/cru/ui/render/CanvasRenderObject.h
+++ b/include/cru/ui/render/CanvasRenderObject.h
@@ -4,6 +4,23 @@
 #include "cru/common/Event.h"
 
 namespace cru::ui::render {
+class CanvasPaintEventArgs {
+ public:
+  CanvasPaintEventArgs(platform::graphics::IPainter* painter,
+                       const Size& paint_size)
+      : painter_(painter), paint_size_(paint_size) {}
+  CRU_DEFAULT_COPY(CanvasPaintEventArgs)
+  CRU_DEFAULT_MOVE(CanvasPaintEventArgs)
+  ~CanvasPaintEventArgs() = default;
+
+  platform::graphics::IPainter* GetPainter() const { return painter_; }
+  Size GetPaintSize() const { return paint_size_; }
+
+ private:
+  platform::graphics::IPainter* painter_;
+  Size paint_size_;
+};
+
 // Layout logic:
 // If no preferred size is set. Then (100, 100) is used and then coerced to
 // required range.
diff --git a/include/cru/ui/render/StackLayoutRenderObject.h b/include/cru/ui/render/StackLayoutRenderObject.h
index 65b81b3d..b522ecbb 100644
--- a/include/cru/ui/render/StackLayoutRenderObject.h
+++ b/include/cru/ui/render/StackLayoutRenderObject.h
@@ -2,6 +2,11 @@
 #include "LayoutRenderObject.h"
 
 namespace cru::ui::render {
+struct StackChildLayoutData {
+  std::optional<Alignment> horizontal;
+  std::optional<Alignment> vertical;
+};
+
 // Measure Logic:
 // Following rules are applied both horizontally and vertically.
 //