From f761d4ef25ab0e695c79ae5c2ede1f850f1607af Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Tue, 9 Sep 2025 19:10:14 +0800
Subject: Develop some xcb window.

---
 include/cru/platform/gui/xcb/UiApplication.h |  8 +++++++-
 include/cru/platform/gui/xcb/Window.h        | 20 +++++++++++++++++---
 2 files changed, 24 insertions(+), 4 deletions(-)

(limited to 'include/cru/platform')

diff --git a/include/cru/platform/gui/xcb/UiApplication.h b/include/cru/platform/gui/xcb/UiApplication.h
index 42d63609..3fce8efa 100644
--- a/include/cru/platform/gui/xcb/UiApplication.h
+++ b/include/cru/platform/gui/xcb/UiApplication.h
@@ -17,8 +17,14 @@ class XcbUiApplication : public XcbResource, public virtual IUiApplication {
   XcbUiApplication();
   ~XcbUiApplication();
 
+ public:
   void CheckXcbConnectionError();
+  xcb_connection_t* GetXcbConnection();
+
+  // This API is weird, but before we have correct screen API, we still use it.
+  xcb_screen_t* GetFirstXcbScreen();
 
+ public:
   int Run() override;
 
   void RequestQuit(int quit_code) override;
@@ -66,7 +72,7 @@ class XcbUiApplication : public XcbResource, public virtual IUiApplication {
   void UnregisterWindow(XcbWindow* window);
 
  private:
-  xcb_connection_t* xcb_;
+  xcb_connection_t* xcb_connection_;
   xcb_screen_t* screen_;
 
   cru::platform::unix::UnixEventLoop event_loop_;
diff --git a/include/cru/platform/gui/xcb/Window.h b/include/cru/platform/gui/xcb/Window.h
index 2d5651e7..1676dced 100644
--- a/include/cru/platform/gui/xcb/Window.h
+++ b/include/cru/platform/gui/xcb/Window.h
@@ -4,11 +4,14 @@
 #include "Base.h"
 
 #include <xcb/xcb.h>
+#include <optional>
 
 namespace cru::platform::gui::xcb {
 class XcbUiApplication;
 
 class XcbWindow : public XcbResource, public virtual INativeWindow {
+  friend XcbUiApplication;
+
  public:
   explicit XcbWindow(XcbUiApplication* application);
   ~XcbWindow() override;
@@ -66,8 +69,8 @@ class XcbWindow : public XcbResource, public virtual INativeWindow {
   virtual IEvent<Size>* ResizeEvent() = 0;
   virtual IEvent<FocusChangeType>* FocusEvent() = 0;
 
-  virtual IEvent<MouseEnterLeaveType>* MouseEnterLeaveEvent() = 0;
-  virtual IEvent<Point>* MouseMoveEvent() = 0;
+  IEvent<MouseEnterLeaveType>* MouseEnterLeaveEvent() override;
+  IEvent<Point>* MouseMoveEvent() override;
   virtual IEvent<NativeMouseButtonEventArgs>* MouseDownEvent() = 0;
   virtual IEvent<NativeMouseButtonEventArgs>* MouseUpEvent() = 0;
   virtual IEvent<NativeMouseWheelEventArgs>* MouseWheelEvent() = 0;
@@ -76,8 +79,19 @@ class XcbWindow : public XcbResource, public virtual INativeWindow {
 
   virtual IInputMethodContext* GetInputMethodContext() = 0;
 
+ public:
+  std::optional<xcb_window_t> GetXcbWindow();
+
+ private:
+  xcb_window_t DoCreateWindow();
+  void HandleEvent(xcb_generic_event_t* event);
+  static std::optional<xcb_window_t> GetEventWindow(xcb_generic_event_t* event);
+
  private:
   XcbUiApplication* application_;
-  xcb_window_t xcb_window_;
+  std::optional<xcb_window_t> xcb_window_;
+
+  Event<MouseEnterLeaveType> mouse_enter_leave_event_;
+  Event<Point> mouse_move_event_;
 };
 }  // namespace cru::platform::gui::xcb
-- 
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