/// <summary>
/// Initialize with the page that we should track.
/// </summary>
/// <param name="page">The PDF page to be rendered</param>
/// <remarks>We will call PeparePageAsync on the page</remarks>
public SlideThumbViewModel(IObservable <Tuple <string, IObservable <PdfPage> > > pageInfo, Lazy <FullTalkAsStripViewModel> fullVM, int pageNumber)
{
PDFPageVM = new PDFPageViewModel(pageInfo);
_fullVM = fullVM;
// And the command to open up a full view of the talk, at max size.
OpenFullView = ReactiveCommand.Create();
OpenFullView
.Subscribe(_ => fullVM.Value.LoadPage(pageNumber));
}
/// <summary>
/// Create the VM. We generate a first page hero slide.
/// </summary>
/// <param name="file">The PDF File to generate. If null, we will make this VM as invalid</param>
public FirstSlideHeroViewModel(PDFFile file, Lazy <FullTalkAsStripViewModel> fullVM)
{
// If we are actually connected to a file, then
// - setup the hero slide
// - a button to show all slides
_heroPageUC = null;
HaveHeroSlide = false;
if (file != null)
{
// Hero slide. Tricky because we can't display until
// a fetch has been done on the PDF data.
var pdf = new PDFPageViewModel(file.GetPageStreamAndCacheInfo(0));
_heroPageUC = pdf.LoadSize()
.Select(_ => pdf)
.ToProperty(this, m => m.HeroPageUC, scheduler: RxApp.MainThreadScheduler);
HaveHeroSlide = true;
// Allow a full view
OpenFullView = ReactiveCommand.Create();
OpenFullView
.Subscribe(_ => fullVM.Value.LoadPage(0));
}
}
