private void ShowDisplayNumber(MovieSeriesEntryViewModel vm)
{
vm.DisplayNumber = (this.Entries
.Where(entry => entry.SequenceNumber < vm.SequenceNumber && entry.DisplayNumber.HasValue)
.Select(entry => entry.DisplayNumber)
.Max() ?? (this.GetFirstDisplayNumber() - 1)) + 1;
this.IncrementNumbers(vm.SequenceNumber);
}
private void SwapEntryNumbers(MovieSeriesEntryViewModel first, MovieSeriesEntryViewModel second)
{
first.SequenceNumber++;
second.SequenceNumber--;
if (first.DisplayNumber.HasValue)
{
first.DisplayNumber++;
}
if (second.DisplayNumber.HasValue)
{
second.DisplayNumber--;
}
}
private MovieSeriesEntryViewModel CreateEntryViewModel(MovieSeriesEntry entry)
{
var viewModel = new MovieSeriesEntryViewModel(entry, this, this.ResourceManager, this.Scheduler);
var subsciptions = new CompositeDisposable();
viewModel.Select
.Select(_ => viewModel)
.InvokeCommand(this.SelectEntry)
.DisposeWith(subsciptions);
viewModel.MoveUp
.Select(_ => viewModel)
.Subscribe(this.MoveEntryUp)
.DisposeWith(subsciptions);
viewModel.MoveDown
.Select(_ => viewModel)
.Subscribe(this.MoveEntryDown)
.DisposeWith(subsciptions);
viewModel.HideDisplayNumber
.Select(_ => viewModel)
.Subscribe(this.HideDisplayNumber)
.DisposeWith(subsciptions);
viewModel.ShowDisplayNumber
.Select(_ => viewModel)
.Subscribe(this.ShowDisplayNumber)
.DisposeWith(subsciptions);
viewModel.Delete
.WhereNotNull()
.InvokeCommand(this.DetachEntry)
.DisposeWith(subsciptions);
viewModel.Delete
.WhereNotNull()
.Discard()
.Subscribe(subsciptions.Dispose)
.DisposeWith(subsciptions);
return(viewModel);
}
private void HideDisplayNumber(MovieSeriesEntryViewModel vm)
{
vm.DisplayNumber = null;
this.DecrementNumbers(vm.SequenceNumber);
}
private void MoveEntryDown(MovieSeriesEntryViewModel vm) => this.SwapEntryNumbers(vm, this.Entries.First(e => e.SequenceNumber == vm.SequenceNumber + 1));
private void MoveEntryUp(MovieSeriesEntryViewModel vm) => this.SwapEntryNumbers(this.Entries.First(e => e.SequenceNumber == vm.SequenceNumber - 1), vm);
