/// <summary>
/// Get everything setup to show the PDF document
/// </summary>
/// <param name="docSequence"></param>
/// <param name="initialPage">The page that should be shown when we start up. Zero indexed</param>
/// <param name="screen">The screen that hosts everything (routing!)</param>
public FullTalkAsStripViewModel(IScreen screen, PDFFile file)
{
Debug.Assert(file != null);
Debug.Assert(screen != null);
HostScreen = screen;
// We basically re-set each time a new file comes down from the top.
Pages = new ReactiveList <PDFPageViewModel>();
var pageSizeChanged = file.WhenAny(x => x.NumberOfPages, x => x.Value)
.DistinctUntilChanged()
.ObserveOn(RxApp.MainThreadScheduler);
var b = from newPageLength in pageSizeChanged
let np = Pages.Count
from allpages in CreateNPages(newPageLength - np, np, file)
select new {
numPages = newPageLength,
freshPages = allpages
};
b
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(info => SetNPages(info.numPages, info.freshPages));
// Page navigation. Make sure things are clean and we don't over-burden the UI before
// we pass the info back to the UI!
_moveToPage = new ReplaySubject <int>(1);
_loaded = new ReplaySubject <Unit>(1);
MoveToPage = _moveToPage
.CombineLatest(_loaded, (p, _) => p)
.Select(scrubPageIndex)
.DistinctUntilChanged();
PageForward = ReactiveCommand.Create();
PageForward
.Cast <int>()
.Select(pn => pn + 1)
.Subscribe(_moveToPage);
PageBack = ReactiveCommand.Create();
PageBack
.Cast <int>()
.Select(pn => pn - 1)
.Subscribe(_moveToPage);
PageMove = ReactiveCommand.Create();
PageMove
.Cast <int>()
.Subscribe(_moveToPage);
}
public async Task <int> Handle(CreatePageForwardCommand request, CancellationToken cancellationToken)
{
var entity = new PageForward
{
Mask = request.Mask,
ProjectId = request.ProjectId,
SourceId = request.SourceId,
Type = request.Type,
DestinationUrl = request.DestinationUrl
};
_context.PageForwards.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
return(entity.Id);
}
