/*-------------------------------------------------------------- POPOLARE CONTENUTI --------------------------------------------------------------*/

        private void PopulateSelectedProject(ListBoxItem listBoxProject)
        {
            DbSet <TimeTrack>  timeTracksDBSet  = intimeDb.TimeTracks;
            DbSet <Assignment> AssignmentsDBSet = intimeDb.Assignments;

            selectedProject = (Project)listBoxProject.Tag;


            // POPOLA LA DATAGRID

            // seleziona tutti gli assignment per un progetto
            List <Assignment> assignmentList = (from Assignment in AssignmentsDBSet
                                                where Assignment.ProjectId == selectedProject.Id
                                                select Assignment).ToList();

            List <AssignmentForDataGrid> dataGridAssignments = new List <AssignmentForDataGrid>();

            long projectTotalTicks = 0; // serve per il tempo totale del progetto

            foreach (Assignment assignment in assignmentList)
            {
                int personId = assignment.PersonId;

                List <TimeTrack> timetracksList = (from TimeTrack in timeTracksDBSet // seleziona tutti i timetrack di UNA persona per IL progetto selezionato
                                                   where TimeTrack.ProjectId == selectedProject.Id
                                                   where TimeTrack.PersonId == personId
                                                   select TimeTrack).ToList();

                long personTotalTicks = 0;
                foreach (TimeTrack track in timetracksList) // calcola il tempo totale della persona
                {
                    personTotalTicks += (long)track.WorkTime;
                }
                projectTotalTicks += personTotalTicks;

                // LISTA ASSIGNMENTS
                AssignmentForDataGrid assignmentForDataGrid = new AssignmentForDataGrid(); // creazione Assignment per DataGrid

                assignmentForDataGrid.name     = assignment.Person.PersonName;
                assignmentForDataGrid.time     = TimeTracker.ToString(TimeSpan.FromTicks(personTotalTicks));
                assignmentForDataGrid.active   = assignment.Active;
                assignmentForDataGrid.personId = assignment.PersonId;
                dataGridAssignments.Add(assignmentForDataGrid);
            }

            // COMBOBOX: FILTRO LISTA PERSONE
            GetPeopleListInComboBox(assignmentList);

            // PROPRIETà DEL PROGETTO (GROUPBOX)

            TotalWorkTime.Text = TimeTracker.ToString(TimeSpan.FromTicks(projectTotalTicks));

            ProjectName.Text = selectedProject.ProjectName; // not null
            Customer.Text    = selectedProject.Customer;    // null
            Description.Text = selectedProject.Description; // null

            if (selectedProject.ProjectAssignedTime != null)
            {
                TimeSpan timespan = TimeSpan.FromTicks((long)selectedProject.ProjectAssignedTime);
                EstimatedTime.Text = TimeTracker.ToString(timespan);
            } // null
            else
            {
                EstimatedTime.Text = "";
            }

            if (selectedProject.DueDate != null)
            {
                DueDate.Text = ((DateTime)selectedProject.DueDate).ToShortDateString();
            } // null
            else
            {
                DueDate.Text = "";
            }

            if (selectedProject.DateCreation != null)
            {
                CreationDate.Text = ((DateTime)selectedProject.DateCreation).ToShortDateString();
            } // null
            else
            {
                CreationDate.Text = "";
            }

            if (selectedProject.Active)    // not null
            {
                Active.Text = "Sì";
            } // not null
            else
            {
                Active.Text = "No";
            }

            // BINDING
            CollectionViewSource itemCollectionViewSource;

            itemCollectionViewSource        = (CollectionViewSource)(FindResource("ItemCollectionViewSource"));
            itemCollectionViewSource.Source = dataGridAssignments;
        }
        /*-------------------------------------------------------------- DETTAGLIO ASSIGNMENT --------------------------------------------------------------*/

        private void AssignmentGrid_RowDoubleClick(object sender, MouseButtonEventArgs e)
        {
            AssignmentForDataGrid  ass        = AssignmentGrid.SelectedItem as AssignmentForDataGrid;
            AssignmentDetailWindow assignment = new AssignmentDetailWindow(ass.personId, selectedProject.Id);
        }