/// <summary>
/// Removes a specified slide from this part (can be undone).
/// </summary>
/// <param name="slide"></param>
public void RemoveSlide(SongSlide slide)
{
if (slide == null)
{
throw new ArgumentNullException("slide");
}
if (Slides.Count <= 1)
{
throw new InvalidOperationException("Can't remove last slide in a part.");
}
int i = Slides.IndexOf(slide);
if (i < 0)
{
throw new InvalidOperationException("Slide is not in this part.");
}
Undo.ChangeFactory.OnChanging(this,
() => { slides.Insert(i, slide); },
() => { slides.Remove(slide); },
"RemoveSlide");
slides.Remove(slide);
}
/// <summary>
/// Duplicates the specified part and inserts the copy
/// directly after the original slide in the same part (can be undone).
/// </summary>
/// <param name="slide">The slide to duplicate.</param>
/// <returns>The created duplicate.</returns>
public SongSlide DuplicateSlide(SongSlide slide)
{
SongSlide s;
int i = Slides.IndexOf(slide);
using (Undo.ChangeFactory.Batch(this, "DuplicateSlide"))
{
s = slide.Copy();
Undo.ChangeFactory.OnChanging(this,
() => { slides.Remove(s); },
() => { slides.Insert(i + 1, s); },
"DuplicateSlide");
slides.Insert(i + 1, s);
}
return(s);
}
/// <summary>
/// Inserts a slide after a specified target slide in this part (can be undone).
/// </summary>
/// <param name="slide">The slide to insert.</param>
/// <param name="target">The target slide. Must be contained in this part.</param>
public void InsertSlideAfter(SongSlide slide, SongSlide target)
{
var index = Slides.IndexOf(target);
if (index < 0)
{
throw new InvalidOperationException("Slide is not in this part.");
}
if (index >= Slides.Count - 1)
{
AddSlide(slide);
}
else
{
Undo.ChangeFactory.OnChanging(this,
() => { slides.Remove(slide); },
() => { slides.Insert(index + 1, slide); },
"InsertSlideAfter");
slides.Insert(index + 1, slide);
}
}