Update main.cpp

src/citra_qt/main.cpp

@@ -824,6 +824,12 @@ void GMainWindow::dragMoveEvent(QDragMoveEvent* event) {
     event->acceptProposedAction();
 }
 
+void GMainWindow::keyPressEvent(QKeyEvent* event) {
+if (event->key() == Qt::Key_F4 && emulation_running) {
+         OnPauseGame();
+     }
+}
+ 
 bool GMainWindow::ConfirmChangeGame() {
     if (emu_thread == nullptr)
         return true;