/// <summary>
/// Inserts a new element behind the CurrentElement and moves the CurrentElement to the
/// new element.
/// This method removes all elements which came after CurrentElement and leaves
/// the inserted element as the new end of the list.
/// </summary>
/// <param name="element">Element to insert.</param>
public void AddAtCurrentElementDeleteBehind(T element)
{
if (CurrentElement == null)
{
CurrentElement = new HistoryListElement <T>(null, null, element);
}
else
{
CurrentElement.Next = new HistoryListElement <T>(null, CurrentElement, element);
this.Forward();
}
}
/// <summary>
/// Hides the CllickedRect of the previous element if it was set and shows it on the
/// CurrentElement of the HistoryList.
/// If the button is set as the PreviousElement in the HistoryList the animation
/// is not played by omitting to set the ClickedRect to hidden.
/// </summary>
private void UpdateClickRect()
{
if (!viewModel.NavigationHistory.IsRepeatedElement())
{
HistoryListElement <PageItem> previousElement = viewModel.NavigationHistory.PreviousElement;
if (previousElement != null && previousElement.Element.MenuButton != null)
{
previousElement.Element.MenuButton.ClickedRectVisibility = Visibility.Hidden;
}
}
HistoryListElement <PageItem> currentElement = viewModel.NavigationHistory.CurrentElement;
if (currentElement != null && currentElement.Element.MenuButton != null)
{
currentElement.Element.MenuButton.ClickedRectVisibility = Visibility.Visible;
}
}
/// <summary>
/// Creates an empty HistoryList with CurrentElement and PreviousElement set
/// to null.
/// </summary>
public HistoryList()
{
CurrentElement = null;
PreviousElement = null;
}
