Merge pull request #39986 from reduz/app-inout-notification

Add a separate application focus/in notification

2 files changed, 20 insertions, 0 deletions

diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index f47afcc4e5..61dc156fbc 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -1790,6 +1790,12 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 			// Restore mouse mode
 			_set_mouse_mode_impl(mouse_mode);
 
+			if (!app_focused) {
+				if (OS::get_singleton()->get_main_loop()) {
+					OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_APPLICATION_FOCUS_IN);
+				}
+				app_focused = true;
+			}
 			break;
 		}
 		case WM_KILLFOCUS: {
@@ -1805,6 +1811,19 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 			}
 			touch_state.clear();
 
+			bool self_steal = false;
+			HWND new_hwnd = (HWND)wParam;
+			if (IsWindow(new_hwnd)) {
+				self_steal = true;
+			}
+
+			if (!self_steal) {
+				if (OS::get_singleton()->get_main_loop()) {
+					OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_APPLICATION_FOCUS_OUT);
+				}
+				app_focused = false;
+			}
+
 			break;
 		}
 		case WM_ACTIVATE: // Watch For Window Activate Message
diff --git a/platform/windows/display_server_windows.h b/platform/windows/display_server_windows.h
index 995ced0809..8433bb449b 100644
--- a/platform/windows/display_server_windows.h
+++ b/platform/windows/display_server_windows.h
@@ -317,6 +317,7 @@ private:
 	int pressrc;
 	HINSTANCE hInstance; // Holds The Instance Of The Application
 	String rendering_driver;
+	bool app_focused = false;
 
 	struct WindowData {
 		HWND hWnd;