connect(nowTreeView, SIGNAL(requestForWarning(const QModelIndex &)), SLOT(displayWarning(const QModelIndex &)));
// event search button clicked
connect(searchButton, SIGNAL(clicked()), SLOT(searchClicked()));
connect(nowTreeView, SIGNAL(requestForWarning(const QModelIndex &)), SLOT(displayWarning(const QModelIndex &)));
// event search button clicked
connect(searchButton, SIGNAL(clicked()), SLOT(searchClicked()));