6 files changed, 47 insertions, 4 deletions
diff --git a/include/cru/ui/controls/Button.hpp b/include/cru/ui/controls/Button.hpp
index 0d2f4898..7299c146 100644
--- a/include/cru/ui/controls/Button.hpp
+++ b/include/cru/ui/controls/Button.hpp
@@ -2,11 +2,15 @@
 #include "ContentControl.hpp"
 
 #include "../helper/ClickDetector.hpp"
+#include "IBorderControl.hpp"
 #include "IClickableControl.hpp"
 #include "cru/common/Event.hpp"
+#include "cru/ui/style/ApplyBorderStyleInfo.hpp"
 
 namespace cru::ui::controls {
-class Button : public ContentControl, public virtual IClickableControl {
+class Button : public ContentControl,
+               public virtual IClickableControl,
+               public virtual IBorderControl {
  public:
   static constexpr std::u16string_view control_type = u"Button";
 
@@ -35,6 +39,8 @@ class Button : public ContentControl, public virtual IClickableControl {
     return click_detector_.StateChangeEvent();
   }
 
+  void ApplyBorderStyle(const style::ApplyBorderStyleInfo& style) override;
+
   const ButtonStyle& GetStyle() const { return style_; }
   void SetStyle(ButtonStyle style);
 
diff --git a/include/cru/ui/controls/IBorderControl.hpp b/include/cru/ui/controls/IBorderControl.hpp
new file mode 100644
index 00000000..817305ef
--- /dev/null
+++ b/include/cru/ui/controls/IBorderControl.hpp
@@ -0,0 +1,10 @@
+#pragma once
+#include "../style/ApplyBorderStyleInfo.hpp"
+#include "Base.hpp"
+#include "cru/common/Base.hpp"
+
+namespace cru::ui::controls {
+struct IBorderControl : virtual Interface {
+  virtual void ApplyBorderStyle(const style::ApplyBorderStyleInfo& style) = 0;
+};
+}  // namespace cru::ui::controls
diff --git a/include/cru/ui/render/BorderRenderObject.hpp b/include/cru/ui/render/BorderRenderObject.hpp
index f1b957cf..ec0bd52b 100644
--- a/include/cru/ui/render/BorderRenderObject.hpp
+++ b/include/cru/ui/render/BorderRenderObject.hpp
@@ -1,5 +1,7 @@
 #pragma once
+#include "../style/ApplyBorderStyleInfo.hpp"
 #include "RenderObject.hpp"
+#include "cru/ui/Base.hpp"
 
 namespace cru::ui::render {
 class BorderRenderObject : public RenderObject {
@@ -64,6 +66,8 @@ class BorderRenderObject : public RenderObject {
 
   void SetBorderStyle(const BorderStyle& style);
 
+  void ApplyBorderStyle(const style::ApplyBorderStyleInfo& style);
+
   RenderObject* HitTest(const Point& point) override;
 
  protected:
diff --git a/include/cru/ui/style/ApplyBorderStyleInfo.hpp b/include/cru/ui/style/ApplyBorderStyleInfo.hpp
new file mode 100644
index 00000000..e9c4ca44
--- /dev/null
+++ b/include/cru/ui/style/ApplyBorderStyleInfo.hpp
@@ -0,0 +1,12 @@
+#pragma once
+#include "../Base.hpp"
+
+namespace cru::ui::style {
+struct ApplyBorderStyleInfo {
+  std::shared_ptr<platform::graphics::IBrush> border_brush;
+  std::optional<Thickness> border_thickness;
+  std::optional<CornerRadius> border_radius;
+  std::shared_ptr<platform::graphics::IBrush> foreground_brush;
+  std::shared_ptr<platform::graphics::IBrush> background_brush;
+};
+}  // namespace cru::ui::style
diff --git a/include/cru/ui/style/Condition.hpp b/include/cru/ui/style/Condition.hpp
index b88a338f..97d29287 100644
--- a/include/cru/ui/style/Condition.hpp
+++ b/include/cru/ui/style/Condition.hpp
@@ -10,10 +10,8 @@
 #include <vector>
 
 namespace cru::ui::style {
-class Condition {
+class Condition : public Object {
  public:
-  virtual ~Condition() = default;
-
   virtual std::vector<IBaseEvent*> ChangeOn(
       controls::Control* control) const = 0;
   virtual bool Judge(controls::Control* control) const = 0;
diff --git a/include/cru/ui/style/Styler.hpp b/include/cru/ui/style/Styler.hpp
index e69de29b..0b48f1ce 100644
--- a/include/cru/ui/style/Styler.hpp
+++ b/include/cru/ui/style/Styler.hpp
@@ -0,0 +1,13 @@
+#pragma once
+#include "../Base.hpp"
+#include "cru/common/Base.hpp"
+
+#include <optional>
+
+namespace cru::ui::style {
+class Styler : public Object {
+ public:
+  virtual void Apply(controls::Control* control) const;
+};
+
+}  // namespace cru::ui::style