3 files changed, 21 insertions, 0 deletions
diff --git a/include/cru/platform/gui/Input.h b/include/cru/platform/gui/Input.h
index 1dbba850..d731cefa 100644
--- a/include/cru/platform/gui/Input.h
+++ b/include/cru/platform/gui/Input.h
@@ -16,6 +16,7 @@ struct MouseButtons {
   constexpr static MouseButton Left = MouseButton::FromOffset(1);
   constexpr static MouseButton Middle = MouseButton::FromOffset(2);
   constexpr static MouseButton Right = MouseButton::FromOffset(3);
+  constexpr static MouseButton Unknown = MouseButton::FromOffset(4);
 };
 
 // Because of the complexity of keyboard layout, I only add code in US keyboard
diff --git a/include/cru/platform/gui/sdl/Input.h b/include/cru/platform/gui/sdl/Input.h
new file mode 100644
index 00000000..c6b97727
--- /dev/null
+++ b/include/cru/platform/gui/sdl/Input.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <cru/platform/gui/Input.h>
+
+#include <SDL3/SDL_mouse.h>
+#include <SDL3/SDL_keyboard.h>
+
+namespace cru::platform::gui::sdl {
+MouseButton ConvertMouseButton(Uint8 button);
+KeyModifier ConvertKeyModifier(SDL_Keymod keymod);
+KeyModifier GetKeyModifier();
+}  // namespace cru::platform::gui::sdl
diff --git a/include/cru/platform/gui/sdl/Window.h b/include/cru/platform/gui/sdl/Window.h
index c9d6505b..9947a1b9 100644
--- a/include/cru/platform/gui/sdl/Window.h
+++ b/include/cru/platform/gui/sdl/Window.h
@@ -4,6 +4,7 @@
 #include <cru/platform/GraphicsBase.h>
 #include <cru/platform/gui/Window.h>
 
+#include <SDL3/SDL_events.h>
 #include <SDL3/SDL_video.h>
 #include <optional>
 
@@ -53,6 +54,11 @@ class SdlWindow : public SdlResource, public virtual INativeWindow {
    */
   void SetWindowRect(const Rect& rect) override;
 
+  /**
+   * Note: SDL3 doesn't have an API to solely set focus without raising the
+   * window. So this method actually calls SDL_RaiseWindow to raise and set
+   * focus to the window.
+   */
   bool RequestFocus() override;
 
   Point GetMousePosition() override;
@@ -85,6 +91,8 @@ class SdlWindow : public SdlResource, public virtual INativeWindow {
   void DoUpdateStyleFlag();
   void DoUpdateTitle();
 
+  bool HandleEvent(const SDL_Event* event);
+
  private:
   SdlUiApplication* application_;
   SDL_Window* sdl_window_;