public void MoveDownALevel(Messenger Parent)
{
ParentMessenger = Parent;
PageNumberStack.Add(CurrentPageNumber);
CurrentPageNumber = 1;
CurrentPageLevel++;
NewDataScope(Parent.Children);
}
public void MoveUpALevel()
{
if (!IsMoveUpButtonEnabled || CurrentPageLevel == 0)
{
return;
}
//Set the current page number and remove it from the stack.
CurrentPageNumber = PageNumberStack.Last();
PageNumberStack.RemoveAt(PageNumberStack.Count - 1);
ObservableCollection <Messenger> newDataScope = new ObservableCollection <Messenger>();
if (ParentMessenger.Parent != null)
{
newDataScope = ParentMessenger.Parent.Children;
if (newDataScope.Any())
{
NewDataScope(newDataScope);
ParentMessenger = ParentMessenger.Parent;
CurrentPageLevel--;
}
else
{
//Parent got deleted
CurrentPageLevel = 0;
CurrentPageNumber = 1;
PageNumberStack.Clear();
NewDataScope(LoadRootGeneralMessengers());
}
}
else
{
//Parent is a root
ParentMessenger = new Messenger();
CurrentPageLevel = 0;
NewDataScope(LoadRootGeneralMessengers());
}
}
