From 4b78e0b74f70bca2e24dc89b4fdca4dc9222c8b9 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 28 Feb 2021 00:22:34 +0800
Subject: ...

---
 include/cru/ui/render/ScrollRenderObject.hpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'include/cru/ui/render/ScrollRenderObject.hpp')

diff --git a/include/cru/ui/render/ScrollRenderObject.hpp b/include/cru/ui/render/ScrollRenderObject.hpp
index 6a6ef198..aed25f8e 100644
--- a/include/cru/ui/render/ScrollRenderObject.hpp
+++ b/include/cru/ui/render/ScrollRenderObject.hpp
@@ -2,6 +2,7 @@
 #include "RenderObject.hpp"
 
 #include "cru/platform/graphics/util/Painter.hpp"
+#include "cru/ui/Base.hpp"
 #include "cru/ui/render/ScrollBar.hpp"
 
 #include <memory>
@@ -29,8 +30,22 @@ class ScrollRenderObject : public RenderObject {
 
   // Return the coerced scroll offset.
   Point GetScrollOffset();
+  float GetScrollOffset(Direction direction) {
+    return direction == Direction::Horizontal ? GetScrollOffset().x
+                                              : GetScrollOffset().y;
+  }
   void SetScrollOffset(const Point& offset);
   void SetScrollOffset(std::optional<float> x, std::optional<float> y);
+  void SetScrollOffset(Direction direction, std::optional<float> value) {
+    if (direction == Direction::Horizontal) {
+      SetScrollOffset(value, std::nullopt);
+    } else {
+      SetScrollOffset(std::nullopt, value);
+    }
+  }
+
+  void Scroll(const Scroll& scroll);
+
   Point GetRawScrollOffset() const { return scroll_offset_; }
 
   // Return the viewable area rect.
-- 
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