/// <summary>
/// Adds the RatingItem to the collection of selected items.
/// </summary>
/// <remarks>
/// This API supports the .NET Framework infrastructure and is not
/// intended to be used directly from your code.
/// </remarks>
void ISelectionItemProvider.AddToSelection()
{
RatingItem owner = OwnerRatingItem;
Rating parent = owner.ParentRating;
if (parent == null || parent.Value != null)
{
throw new InvalidOperationException("Operation cannot be performed.");
}
owner.SelectValue();
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (!Interaction.AllowKeyDown(e))
{
return;
}
base.OnKeyDown(e);
if (e.Handled)
{
return;
}
switch (e.Key)
{
case Key.Left:
{
#if SILVERLIGHT
RatingItem ratingItem = FocusManager.GetFocusedElement() as RatingItem;
#else
var ratingItem = FocusManager.GetFocusedElement(Application.Current.MainWindow) as RatingItem;
#endif
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, -1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
if (ratingItem.Focus())
{
e.Handled = true;
}
}
}
break;
case Key.Right:
{
#if SILVERLIGHT
RatingItem ratingItem = FocusManager.GetFocusedElement() as RatingItem;
#else
var ratingItem = FocusManager.GetFocusedElement(Application.Current.MainWindow) as RatingItem;
#endif
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, 1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
if (ratingItem.Focus())
{
e.Handled = true;
}
}
}
break;
case Key.Add:
{
if (!IsReadOnly)
{
RatingItem ratingItem = GetSelectedRatingItem();
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, 1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
ratingItem.SelectValue();
e.Handled = true;
}
}
}
break;
case Key.Subtract:
{
if (!IsReadOnly)
{
RatingItem ratingItem = GetSelectedRatingItem();
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, -1);
}
if (ratingItem != null)
{
ratingItem.SelectValue();
e.Handled = true;
}
}
}
break;
}
}
