1 files changed, 66 insertions, 0 deletions
diff --git a/include/cru/ui/render/TreeRenderObject.h b/include/cru/ui/render/TreeRenderObject.h
new file mode 100644
index 00000000..203474db
--- /dev/null
+++ b/include/cru/ui/render/TreeRenderObject.h
@@ -0,0 +1,66 @@
+#pragma once
+#include "RenderObject.h"
+
+namespace cru::ui::render {
+class TreeRenderObject;
+
+class CRU_UI_API TreeRenderObjectItem : public Object {
+  friend TreeRenderObject;
+
+ private:
+  explicit TreeRenderObjectItem(TreeRenderObject* tree_render_object,
+                                TreeRenderObjectItem* parent);
+
+ public:
+  CRU_DELETE_COPY(TreeRenderObjectItem)
+  CRU_DELETE_MOVE(TreeRenderObjectItem)
+  ~TreeRenderObjectItem() override;
+
+  RenderObject* GetRenderObject() { return render_object_; }
+  void SetRenderObject(RenderObject* render_object);
+
+  const std::vector<TreeRenderObjectItem*>& GetChildren() const {
+    return children_;
+  }
+
+  Index GetChildCount() const { return children_.size(); }
+
+  TreeRenderObjectItem* GetChild(Index index) {
+    Expects(index >= 0 && index < children_.size());
+    return children_[index];
+  }
+
+  TreeRenderObjectItem* AddItem(Index position);
+  void RemoveItem(Index position);
+
+ private:
+  TreeRenderObject* tree_render_object_;
+
+  TreeRenderObjectItem* parent_;
+  std::vector<TreeRenderObjectItem*> children_;
+
+  RenderObject* render_object_;
+};
+
+class CRU_UI_API TreeRenderObject : public RenderObject {
+  CRU_DEFINE_CLASS_LOG_TAG(u"cru::ui::render:TreeRenderObject")
+
+ public:
+  TreeRenderObject();
+  CRU_DELETE_COPY(TreeRenderObject)
+  CRU_DELETE_MOVE(TreeRenderObject)
+  ~TreeRenderObject() override;
+
+  std::u16string_view GetName() const override { return u"TreeRenderObject"; }
+
+  TreeRenderObjectItem* GetRootItem() { return root_item_; }
+
+ protected:
+  Size OnMeasureContent(const MeasureRequirement& requirement,
+                        const MeasureSize& preferred_size) override;
+  void OnLayoutContent(const Rect& content_rect) override;
+
+ private:
+  TreeRenderObjectItem* root_item_;
+};
+}  // namespace cru::ui::render