private void button_Click(object sender, RoutedEventArgs e)
        {
            if (calendar.SelectedDate == null)
            {
                System.Windows.MessageBox.Show("Unesite datum renoviranja.");
                return;
            }

            DateTime renovationDateTime = (DateTime)calendar.SelectedDate;
            //RoomPage.SetRenovation((uint)idLabel.Content, (DateTime)calendar.SelectedDate);
            int roomLabel = Int32.Parse(idLabel.Content.ToString());

            if (renovationDateTime < DateTime.Now)
            {
                System.Windows.MessageBox.Show("Unesite dobar datum renoviranja.");
                return;
            }

            if (renovationTypeComboBox.SelectedItem.Equals("mergeRooms"))
            {
                if (roomComboBox.SelectedItem == null)
                {
                    System.Windows.MessageBox.Show("Unesite sobu sa kojom spajate.");
                    return;
                }

                RoomView roomToDelete = (RoomView)roomComboBox.SelectedItem;


                if (_roomController.CanRenovate(roomLabel, renovationDateTime) && _roomController.CanRenovate((int)roomToDelete.Id, renovationDateTime))
                {
                    var mergedRoom = _roomController.Merge(roomLabel, (int)roomToDelete.Id);

                    if (mergedRoom == null)
                    {
                        System.Windows.MessageBox.Show("Spajanje nije moguce");
                        return;
                    }

                    RoomPage.DeleteRoom(roomToDelete.Id);
                }
                else
                {
                    System.Windows.MessageBox.Show("Renoviranje nije dozvoljeno");
                    return;
                }
            }
            else
            {
                if (_roomController.CanRenovate(roomLabel, renovationDateTime))
                {
                    if (renovationTypeComboBox.SelectedItem.Equals("splitRoom"))
                    {
                        Room oldRoom = _roomController.Get(roomLabel);
                        Room newRoom = new Room();
                        newRoom.RoomType = oldRoom.RoomType;
                        _roomController.Add(newRoom);

                        RoomPage.RoomList.Add(new RoomView(newRoom, _roomController));
                    }
                }
                else
                {
                    System.Windows.MessageBox.Show("Renoviranje nije dozvoljeno");
                    return;
                }
            }


            Renovation renovation = new Renovation();

            renovation.Date           = renovationDateTime;
            renovation.RenovationType = (RenovationType)renovationTypeComboBox.SelectedIndex;
            _roomController.AddRenovation(renovation);

            Room room = _roomController.Get(roomLabel);

            room.Renovation.Add(renovation.Id);
            _roomController.Update(room);
            RoomPage.SetRenovation((uint)idLabel.Content, (DateTime)calendar.SelectedDate);

            System.Windows.MessageBox.Show("Uspešno ste sačuvali informacije.");
            NavigationService.Navigate(new Page());
        }