1 files changed, 87 insertions, 3 deletions
diff --git a/include/cru/ui/base.hpp b/include/cru/ui/base.hpp
index 703d61fc..fe53edd4 100644
--- a/include/cru/ui/base.hpp
+++ b/include/cru/ui/base.hpp
@@ -1,10 +1,15 @@
 #pragma once
 #include "cru/common/base.hpp"
-#include "cru/platform/graph_base.hpp"
-#include "cru/platform/matrix.hpp"
-#include "cru/platform/native/basic_types.hpp"
+#include "cru/platform/graph/base.hpp"
+#include "cru/platform/native/base.hpp"
+
+#include <functional>
+#include <memory>
+#include <optional>
+#include <vector>
 
 namespace cru::ui {
+//-------------------- region: import --------------------
 using cru::platform::Color;
 using cru::platform::Ellipse;
 using cru::platform::Matrix;
@@ -28,6 +33,12 @@ using cru::platform::colors::skyblue;
 using cru::platform::colors::white;
 }  // namespace colors
 
+//-------------------- region: forward declaration --------------------
+class Window;
+class Control;
+class ClickDetector;
+
+//-------------------- region: basic types --------------------
 namespace internal {
 constexpr int align_start = 0;
 constexpr int align_end = align_start + 1;
@@ -41,4 +52,77 @@ enum class Alignment {
   Center = internal::align_center,
   Stretch = internal::align_stretch
 };
+
+struct CornerRadius {
+  constexpr CornerRadius()
+      : left_top(), right_top(), left_bottom(), right_bottom() {}
+  constexpr CornerRadius(const Point& value)
+      : left_top(value),
+        right_top(value),
+        left_bottom(value),
+        right_bottom(value) {}
+  constexpr CornerRadius(Point left_top, Point right_top, Point left_bottom,
+                         Point right_bottom)
+      : left_top(left_top),
+        right_top(right_top),
+        left_bottom(left_bottom),
+        right_bottom(right_bottom) {}
+
+  Point left_top;
+  Point right_top;
+  Point left_bottom;
+  Point right_bottom;
+};
+
+inline bool operator==(const CornerRadius& left, const CornerRadius& right) {
+  return left.left_top == right.left_top &&
+         left.left_bottom == right.left_bottom &&
+         left.right_top == right.right_top &&
+         left.right_bottom == right.right_bottom;
+}
+
+inline bool operator!=(const CornerRadius& left, const CornerRadius& right) {
+  return !(left == right);
+}
+
+class CanvasPaintEventArgs {
+ public:
+  CanvasPaintEventArgs(platform::graph::IPainter* painter,
+                       const Rect& paint_rect)
+      : painter_(painter), paint_rect_(paint_rect) {}
+  CRU_DEFAULT_COPY(CanvasPaintEventArgs)
+  CRU_DEFAULT_MOVE(CanvasPaintEventArgs)
+  ~CanvasPaintEventArgs() = default;
+
+  platform::graph::IPainter* GetPainter() const { return painter_; }
+  Rect GetPaintRect() const { return paint_rect_; }
+
+ private:
+  platform::graph::IPainter* painter_;
+  Rect paint_rect_;
+};
+
+enum class FlexDirection {
+  Horizontal,
+  HorizontalReverse,
+  Vertical,
+  VertivalReverse
+};
+
+using FlexMainAlignment = Alignment;
+using FlexCrossAlignment = Alignment;
+
+struct FlexChildLayoutData {
+  // nullopt stands for looking at my content
+  std::optional<float> flex_basis = std::nullopt;
+  float flex_grow = 0;
+  float flex_shrink = 0;
+  // nullopt stands for looking at parent's setting
+  std::optional<FlexCrossAlignment> cross_alignment = std::nullopt;
+};
+
+struct StackChildLayoutData {
+  Alignment horizontal = Alignment::Start;
+  Alignment vertical = Alignment::Start;
+};
 }  // namespace cru::ui