private void Button_Click(object sender, RoutedEventArgs e)
{
Int32 ordinal = Int32.Parse(((Button)sender).Tag.ToString());
var current = Persons.First(p => p.Ordinal == ordinal);
var below = Persons.First(p => p.Ordinal == ordinal + 1);
_undoRedoHistory.BeginCompoundDo(0); // Passing in zero to get the first memento pointer back
PropertyChangedMemento <PersonList, Person, int> MoveDownPropertyChangedMemento = new PropertyChangedMemento <PersonList, Person, int>(current, Person.PropertyOrdinal, current.Ordinal);
PropertyChangedMemento <PersonList, Person, int> MoveUpPropertyChangedMemento = new PropertyChangedMemento <PersonList, Person, int>(below, Person.PropertyOrdinal, below.Ordinal);
MoveItemDownMemento <PersonList, Person> moveItemDownMemento = new MoveItemDownMemento <PersonList, Person>(current, ordinal + 1);
_undoRedoHistory.CheckPoint(MoveDownPropertyChangedMemento);
_undoRedoHistory.CheckPoint(MoveUpPropertyChangedMemento);
_undoRedoHistory.CheckPoint(moveItemDownMemento);
_undoRedoHistory.EndCompoundDo();
current.Ordinal = ordinal + 1;
below.Ordinal = ordinal;
Persons.Move(ordinal, ordinal + 1);
DataGrid1.ScrollIntoView(current);
}
public IListTOfVMemento <T, U> Restore(T target)
{
var returnMemento = new MoveItemDownMemento <T, U>(_child, _index + 1);
target.Move(_index, _index + 1);
return(returnMemento);
}