+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+ close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL | Qt::Key_Q), this, SLOT(close()));
+ close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL | Qt::Key_W), this, SLOT(on_close_current_tab()));
+#else