+ if (fabs(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM;
+ else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP;
+ else if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;