/// <summary>
/// PositionProperty property changed handler.
/// </summary>
/// <param name="d">Slide that changed its Position.</param>
/// <param name="e">Event arguments.</param>
private static void OnPositionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Slide source = d as Slide;
SlidePosition value = (SlidePosition)e.NewValue;
if (value != SlidePosition.Left &&
value != SlidePosition.Normal &&
value != SlidePosition.Right)
{
d.SetValue(e.Property, e.OldValue);
return;
}
source.UpdateVisualState(true, value);
}
/// <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;
}
}
void SetSlidePosition(int slideIndex)
{
if (slideIndex != tutorialContents.Count - 1 && slideIndex != 0)
{
slidePosition = SlidePosition.Default;
}
else if (slideIndex == 0)
{
slidePosition = SlidePosition.First;
}
else if (slideIndex == tutorialContents.Count - 1)
{
slidePosition = SlidePosition.Last;
}
}
/// <summary>
/// Move in a direction.
/// </summary>
/// <param name="forward">A value indicating whether the direction to
/// move is forward or not.</param>
private void Move(bool forward)
{
LinkedListNode <Slide> oldNode = _current;
Slide old = oldNode.Value;
SlidePosition sp = SlidePosition.Normal;
if (forward && oldNode.Next != null)
{
_current = oldNode.Next;
sp = SlidePosition.Left;
}
else if (!forward && oldNode.Previous != null)
{
_current = oldNode.Previous;
sp = SlidePosition.Right;
}
if (oldNode != _current)
{
_current.Value.Position = SlidePosition.Normal;
old.Position = sp;
}
}
/// <summary>
/// Updates the visual state.
/// </summary>
/// <param name="useTransitions">A value indicating whether to use
/// visual transitions for the state change.</param>
/// <param name="sp">The slide position to use.</param>
private void UpdateVisualState(bool useTransitions, SlidePosition sp)
{
string state;
switch (Position)
{
case SlidePosition.Left:
state = StatePositionLeft;
break;
case SlidePosition.Right:
state = StatePositionRight;
break;
default:
state = StatePositionNormal;
break;
}
// Always expand the visual for a state change
Visibility = Visibility.Visible;
VisualStateManager.GoToState(this, state, false); // useTransitions);
}
/// <summary>
/// Updates the visual state.
/// </summary>
/// <param name="useTransitions">A value indicating whether to use
/// visual transitions for the state change.</param>
/// <param name="sp">The slide position to use.</param>
private void UpdateVisualState(bool useTransitions, SlidePosition sp)
{
string state;
switch (Position)
{
case SlidePosition.Left:
state = StatePositionLeft;
break;
case SlidePosition.Right:
state = StatePositionRight;
break;
default:
state = StatePositionNormal;
break;
}
// Always expand the visual for a state change
Visibility = Visibility.Visible;
VisualStateManager.GoToState(this, state, false); // useTransitions);
}
