diff --git a/src/controls/TopLevelMenu.qml b/src/controls/TopLevelMenu.qml
index 7fd202d..72ebc37 100644
--- a/src/controls/TopLevelMenu.qml
+++ b/src/controls/TopLevelMenu.qml
@@ -39,4 +39,8 @@ Meui.PopupWindow {
     function open() {
         control.show()
     }
+
+    function popup() {
+        control.show()
+    }
 }
diff --git a/src/popupwindow.cpp b/src/popupwindow.cpp
index d1aeba8..61ade50 100644
--- a/src/popupwindow.cpp
+++ b/src/popupwindow.cpp
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2021 CutefishOS Team.
+ *
+ * Author:     cutefish <cutefishos@foxmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "popupwindow.h"
 #include <QGuiApplication>
 #include <QQuickRenderControl>
diff --git a/src/popupwindow.h b/src/popupwindow.h
index 6f2cf54..e545f59 100644
--- a/src/popupwindow.h
+++ b/src/popupwindow.h
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2021 CutefishOS Team.
+ *
+ * Author:     cutefish <cutefishos@foxmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef TOPLEVELMENU_H
 #define TOPLEVELMENU_H