/// <summary>
/// Initializes the position of the slide based on location.
/// </summary>
/// <param name="slide">The slide instance.</param>
/// <param name="isFirst">A property indicating whether the slide is the
/// first to be managed.</param>
private void InitializePosition(Slide slide, bool isFirst)
{
SlidePosition c = slide.Position;
SlidePosition expected = isFirst ? SlidePosition.Normal : SlidePosition.Right;
if (c != expected)
{
slide.Position = expected;
}
// CONSIDER: Need to modify all others as well?
if (_slides.First != null && _slides.First.Value == slide)
{
_current = _slides.First;
}
}
/// <summary>
/// Moves to a specific slide, moving the others to the appropriate
/// direction on screen.
/// </summary>
/// <param name="slide">The slide to move to.</param>
public void MoveTo(Slide slide)
{
LinkedListNode<Slide> sn = _slides.Find(slide);
if (sn != null)
{
// Before
LinkedListNode<Slide> otherNode = sn.Previous;
while (otherNode != null)
{
otherNode.Value.Position = SlidePosition.Right;
otherNode = otherNode.Previous;
}
// The slide
slide.Position = SlidePosition.Normal;
_current = sn;
// After
otherNode = sn.Next;
while (otherNode != null)
{
otherNode.Value.Position = SlidePosition.Left;
otherNode = otherNode.Next;
}
}
}
/// <summary>
/// Remove a slide from management.
/// </summary>
/// <param name="slide">The slide instance.</param>
public void Remove(Slide slide)
{
_slides.Remove(slide);
}
/// <summary>
/// Inserts a slide as the first in the linked list.
/// </summary>
/// <param name="newSlide">The new slide instance.</param>
/// <returns>Returns the linked list node.</returns>
public LinkedListNode<Slide> InsertFirst(Slide newSlide)
{
LinkedListNode<Slide> node = _slides.AddFirst(newSlide);
InitializePosition(newSlide, true);
return node;
}
/// <summary>
/// Insert a slide after a provided linked list node.
/// </summary>
/// <param name="before">The node to insert after.</param>
/// <param name="newSlide">The new slide to insert.</param>
/// <returns>Returns the new linked list node.</returns>
public LinkedListNode<Slide> InsertAfter(LinkedListNode<Slide> before, Slide newSlide)
{
LinkedListNode<Slide> newNode;
if (before == null)
{
newNode = _slides.AddFirst(newSlide);
}
else
{
newNode = _slides.AddAfter(before, newSlide);
}
InitializePosition(newSlide, before == null);
return newNode;
}
/// <summary>
/// Manages a new slide, inserting it after an existing slide node.
/// </summary>
/// <param name="before">The node to insert after.</param>
/// <param name="newSlide">The new slide instance.</param>
/// <returns>Returns the linked list node that is inserted.</returns>
public LinkedListNode<Slide> InsertAfter(Slide before, Slide newSlide)
{
if (before == null)
{
return InsertFirst(newSlide);
}
LinkedListNode<Slide> node = _slides.Find(before);
return InsertAfter(node, newSlide);
}
/// <summary>
/// Creates a new slide and inserts it into the slide manager, plus
/// visual tree.
/// </summary>
/// <param name="header">The text header to use.</param>
/// <param name="content">The content to inside the slide.</param>
/// <returns>Returns the new Slide instance.</returns>
private Slide CreateAndInsertSlide(string header, object content)
{
Slide slide = new Slide();
slide.Content = content;
slide.Header = new ContentControl
{
Content = header,
Style = (Style)Resources["TextHeaderContent"],
};
Slides.Children.Add(slide);
_slides.InsertFirst(slide); // Front
return slide;
}
/// <summary>
/// Remove a slide from management.
/// </summary>
/// <param name="slide">The slide instance.</param>
public void Remove(Slide slide)
{
_slides.Remove(slide);
}
