public int FindOverlay(SlideOverlay slideOverlay)
{
lock (this) {
if (overlaysRev.ContainsKey(slideOverlay))
{
return(overlaysRev[slideOverlay]);
}
return(-1);
}
}
private void SetOverlay(int index, SlideOverlay overlay)
{
if (overlays.ContainsKey(index))
{
if (overlaysRev.ContainsKey(overlays[index]))
{
overlaysRev.Remove(overlays[index]);
}
overlays.Remove(index);
}
overlays.Add(index, overlay);
overlaysRev.Add(overlays[index], index);
if (!slides.ContainsKey(index))
{
slides.Add(index, slidesByAccess.AddFirst(new Slide()));
slidesRev.Add(slides[index].Value, index);
}
}