public void MouseDown(Position.VirtualMousePosition mouseMove)
{
m_startPt = (PointD) mouseMove.GetPhysicalPoint();
m_virtualDelta = new List<PointD>();
m_realDelta = new List<PointD>();
// initial movement is nothing
m_virtualDelta.Add(PointD.Empty);
m_realDelta.Add(PointD.Empty);
}
// called very frequently
public void MouseMoved(Position.VirtualMousePosition mouseMove)
{
m_virtualDelta.Add(mouseMove.GetVirtualPointD() - mouseMove.GetLastVirtualPointD());
m_realDelta.Add(new PointD (mouseMove.GetPhysicalPoint().X - mouseMove.GetLastPhysicalPoint().X,
mouseMove.GetPhysicalPoint().Y - mouseMove.GetLastPhysicalPoint().Y));
if (m_virtualDelta.Count > MouseLogger.TAIL_LENGTH)
{
// BUG: sometimes mouseMoved gets fired with no movement of the mouse,
// flooding the event queue with many points of data estimated to be
// > 40,000 points. Remove first half of the point data when such a
// condition may occur.
m_virtualDelta.RemoveRange(0, MouseLogger.TAIL_LENGTH / 2);
m_realDelta.RemoveRange(0, MouseLogger.TAIL_LENGTH / 2);
}
}