1 files changed, 48 insertions, 0 deletions
diff --git a/src/ui/render/window_render_object.cpp b/src/ui/render/window_render_object.cpp
new file mode 100644
index 00000000..52452bd4
--- /dev/null
+++ b/src/ui/render/window_render_object.cpp
@@ -0,0 +1,48 @@
+#include "window_render_object.hpp"
+
+#include <cassert>
+
+#include "graph/graph.hpp"
+#include "ui/window.hpp"
+
+namespace cru::ui::render {
+void WindowRenderObject::MeasureAndLayout() {
+  const auto client_size = window_->GetClientSize();
+  Measure(client_size);
+  Layout(Rect{Point::Zero(), client_size});
+}
+
+void WindowRenderObject::Draw(ID2D1RenderTarget* render_target) {
+  if (const auto child = GetChild()) {
+    auto offset = child->GetOffset();
+    graph::WithTransform(render_target,
+                         D2D1::Matrix3x2F::Translation(offset.x, offset.y),
+                         [child](auto rt) { child->Draw(rt); });
+  }
+}
+
+RenderObject* WindowRenderObject::HitTest(const Point& point) {
+  if (const auto child = GetChild()) {
+    auto offset = child->GetOffset();
+    Point p{point.x - offset.x, point.y - offset.y};
+    const auto result = child->HitTest(point);
+    if (result != nullptr) {
+      return result;
+    }
+  }
+  return Rect{Point::Zero(), GetSize()}.IsPointInside(point) ? this : nullptr;
+}
+
+void WindowRenderObject::OnAddChild(RenderObject* new_child, int position) {
+  assert(GetChildren().size() == 1);
+}
+
+Size WindowRenderObject::OnMeasureContent(const Size& available_size) {
+  if (const auto child = GetChild()) child->Measure(available_size);
+  return available_size;
+}
+
+void WindowRenderObject::OnLayoutContent(const Rect& content_rect) {
+  if (const auto child = GetChild()) child->Layout(content_rect);
+}
+}  // namespace cru::ui::render