From e8e71847dccceee038338dab4e430957639f3d63 Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Wed, 10 Sep 2025 00:38:59 +0800
Subject: xcb window visibility event.

---
 include/cru/platform/gui/xcb/Window.h |  6 ++++--
 src/platform/gui/xcb/Window.cpp       | 22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/include/cru/platform/gui/xcb/Window.h b/include/cru/platform/gui/xcb/Window.h
index 4c9e3f4d..62351645 100644
--- a/include/cru/platform/gui/xcb/Window.h
+++ b/include/cru/platform/gui/xcb/Window.h
@@ -64,9 +64,9 @@ class XcbWindow : public XcbResource, public virtual INativeWindow {
 
   IEvent<std::nullptr_t>* CreateEvent() override;
   IEvent<std::nullptr_t>* DestroyEvent() override;
-  virtual IEvent<std::nullptr_t>* PaintEvent() = 0;
+  IEvent<std::nullptr_t>* PaintEvent() override;
 
-  virtual IEvent<WindowVisibilityType>* VisibilityChangeEvent() = 0;
+  IEvent<WindowVisibilityType>* VisibilityChangeEvent() override;
   IEvent<Size>* ResizeEvent() override;
   IEvent<FocusChangeType>* FocusEvent() override;
 
@@ -95,7 +95,9 @@ class XcbWindow : public XcbResource, public virtual INativeWindow {
 
   Event<std::nullptr_t> create_event_;
   Event<std::nullptr_t> destroy_event_;
+  Event<std::nullptr_t> paint_event_;
 
+  Event<WindowVisibilityType> visibility_change_event_;
   Event<Size> resize_event_;
   Event<FocusChangeType> focus_event_;
   Event<MouseEnterLeaveType> mouse_enter_leave_event_;
diff --git a/src/platform/gui/xcb/Window.cpp b/src/platform/gui/xcb/Window.cpp
index 67568dce..3f22e6b0 100644
--- a/src/platform/gui/xcb/Window.cpp
+++ b/src/platform/gui/xcb/Window.cpp
@@ -59,6 +59,12 @@ IEvent<std::nullptr_t> *XcbWindow::CreateEvent() { return &create_event_; }
 
 IEvent<std::nullptr_t> *XcbWindow::DestroyEvent() { return &destroy_event_; }
 
+IEvent<std::nullptr_t> *XcbWindow::PaintEvent() { return &paint_event_; }
+
+IEvent<WindowVisibilityType> *XcbWindow::VisibilityChangeEvent() {
+  return &visibility_change_event_;
+}
+
 IEvent<Size> *XcbWindow::ResizeEvent() { return &resize_event_; }
 
 IEvent<FocusChangeType> *XcbWindow::FocusEvent() { return &focus_event_; }
@@ -140,6 +146,14 @@ void XcbWindow::HandleEvent(xcb_generic_event_t *event) {
       }
       break;
     }
+    case XCB_MAP_NOTIFY: {
+      visibility_change_event_.Raise(WindowVisibilityType::Show);
+      break;
+    }
+    case XCB_UNMAP_NOTIFY: {
+      visibility_change_event_.Raise(WindowVisibilityType::Hide);
+      break;
+    }
     case XCB_FOCUS_IN: {
       focus_event_.Raise(FocusChangeType::Gain);
       break;
@@ -236,6 +250,14 @@ std::optional<xcb_window_t> XcbWindow::GetEventWindow(
           (xcb_configure_notify_event_t *)event;
       return configure->event;
     }
+    case XCB_MAP_NOTIFY: {
+      xcb_map_notify_event_t *map = (xcb_map_notify_event_t *)event;
+      return map->event;
+    }
+    case XCB_UNMAP_NOTIFY: {
+      xcb_unmap_notify_event_t *unmap = (xcb_unmap_notify_event_t *)event;
+      return unmap->event;
+    }
     case XCB_FOCUS_IN: {
       xcb_focus_in_event_t *fi = (xcb_focus_in_event_t *)event;
       return fi->event;
-- 
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