- add_btn.clicked.connect (slot (*this, &LibraryTree::add_btn_clicked));
- folder_btn.clicked.connect (slot(*this, &LibraryTree::folder_btn_clicked));
- remove_btn.clicked.connect (slot(*this, &LibraryTree::remove_btn_clicked));
- find_btn.clicked.connect (slot (*this, &LibraryTree::find_btn_clicked));
+ add_btn.signal_clicked().connect (slot (*this, &LibraryTree::add_btn_clicked));
+ folder_btn.signal_clicked().connect (slot(*this, &LibraryTree::folder_btn_clicked));
+ remove_btn.signal_clicked().connect (slot(*this, &LibraryTree::remove_btn_clicked));
+ find_btn.signal_clicked().connect (slot (*this, &LibraryTree::find_btn_clicked));