public AppLogic(IUserInterface ui, AppLogic oldLogic = null)
{
this.ui = ui;
if (oldLogic == null) {
this.formulaDatabase = ui.GetDatabase<Formula> (ui.DatabaseLocation + "formula_database.db3");
this.categoryDatabase = ui.GetDatabase<Category> (ui.DatabaseLocation + "category_database.db3");
} else {
this.formulaDatabase = oldLogic.formulaDatabase;
this.categoryDatabase = oldLogic.categoryDatabase;
}
}
