public void ShiftWindowDown()
{
if (VisibleWindow.TryShiftDown())
{
if (_chain.Last.IsLowerHalf(_chain.Last))
{
_chain.LoadNextPage();
}
}
else
{
if (_chain.IsLowerLimit)
{
CarrierFactory.SetBumperCounterDirection(this);
}
else
{
CarrierFactory.Suspend();
}
}
}
public void ShiftWindowUp()
{
if (VisibleWindow.TryShiftUp())
{
if (_chain.First.IsUpperHalf(_chain.First))
{
_chain.LoadPreviousPage();
}
}
else
{
if (_chain.IsUpperLimit)
{
CarrierFactory.SetBumperCoDirection(this);
}
else
{
CarrierFactory.Suspend();
}
}
}