if ( (m_lastMouseEvent == wxEVT_RIGHT_DOWN ||
m_lastMouseEvent == wxEVT_LEFT_DOWN ||
m_lastMouseEvent == wxEVT_MIDDLE_DOWN) &&
- (m_lastMouseX == event.m_x && m_lastMouseY == event.m_y) )
+ (m_lastMouseX == x && m_lastMouseY == y) )
{
m_lastMouseEvent = wxEVT_MOTION;