connect(_player_form, SIGNAL(library()), this, SLOT(library()));
connect(_library_form, SIGNAL(player()), this, SLOT(player()));
connect(add_directory, SIGNAL(triggered()), this, SLOT(_add_directory()));
connect(save_playlist, SIGNAL(triggered()), this, SLOT(_save_playlist()));
connect(clear_playlist, SIGNAL(triggered()), this, SLOT(_clear_current_playlist()));
connect(_player_form, SIGNAL(library()), this, SLOT(library()));
connect(_library_form, SIGNAL(player()), this, SLOT(player()));
connect(add_directory, SIGNAL(triggered()), this, SLOT(_add_directory()));
connect(save_playlist, SIGNAL(triggered()), this, SLOT(_save_playlist()));
connect(clear_playlist, SIGNAL(triggered()), this, SLOT(_clear_current_playlist()));