// This method creates and initializes the slide at the specified index and returns it.
// The new slide is cached in the _slides array.
private Slide GetSlide(int slideIndex, bool loadIfNeeded)
{
if (slideIndex < 0 || slideIndex >= SlideSettings.Slides.Count())
{
return(null);
}
// Look into the cache first
if (SlideCache.ContainsKey(slideIndex.ToString()))
{
return(SlideCache [slideIndex.ToString()]);
}
if (!loadIfNeeded)
{
return(null);
}
// Create the new slide
Type slideClass = ClassOfSlide(slideIndex);
var slide = (Slide)Activator.CreateInstance(slideClass);
// Update its parameters
var slideSettings = SlideSettings.Slides [slideIndex].Slide;
if (slideSettings != null)
{
slide.Fetch(slideSettings);
}
SlideCache [slideIndex.ToString()] = slide;
if (slide == null)
{
return(null);
}
// Setup the slide
slide.SetupSlide(this);
return(slide);
}
