public CtrlPresentacio() {
ctrlCat = new ctrlCategories();
ctrlLlib = new crtlLlibres();
ctrlDist = new ctrlDistribucions();
// ctrlMats = new ctrlMatrius();
vistaMenu = new vistaMenuPrincipal(this);
ctrlCat.inicialitzarCategories();
hash = new HashSet<String>();
}
