public ColumnPickerViewModel(string identifier, IColumnsService columnsService, ISchedulerService schedulerService)
{
_identifier = identifier;
_columnsService = columnsService;
_schedulerService = schedulerService;
_left = new RangeObservableCollection <ColumnPickerItemViewModel>();
_right = new RangeObservableCollection <ColumnPickerItemViewModel>();
_columnsService.Initialised
.ObserveOn(schedulerService.TaskPool)
.StartWith(new [] { identifier })
.Where(x => x == identifier)
.Select(x =>
{
var visible = columnsService.VisibleColumns(identifier)
.Select(y => new ColumnPickerItemViewModel(y, ColumnHelper.DisplayName(y)))
.ToArray();
var hidden = columnsService.HiddenColumns(identifier)
.Select(y => new ColumnPickerItemViewModel(y, ColumnHelper.DisplayName(y)))
.ToArray();
return(new VisibleColumns(visible, hidden));
})
.ObserveOn(schedulerService.Dispatcher)
.Subscribe(x =>
{
_left.Clear();
_right.Clear();
_left.AddRange(x.Hidden);
_right.AddRange(x.Visible);
})
.DisposeWith(this);
AddCommand = ReactiveCommand.Create(CanAddObservable())
.DisposeWith(this);
RemoveCommand = ReactiveCommand.Create(CanRemoveObservable())
.DisposeWith(this);
MoveupCommand = ReactiveCommand.Create(CanMoveupObservable())
.DisposeWith(this);
MovedownCommand = ReactiveCommand.Create(CanMovedownObservable())
.DisposeWith(this);
AddCommand.ActivateGestures()
.Subscribe(x => Add())
.DisposeWith(this);
RemoveCommand.ActivateGestures()
.Subscribe(x => Remove())
.DisposeWith(this);
MoveupCommand.ActivateGestures()
.Subscribe(x => Moveup())
.DisposeWith(this);
MovedownCommand.ActivateGestures()
.Subscribe(x => Movedown())
.DisposeWith(this);
}