fabs(drag_dy = cursor_y-y1) < r ) dragging = 8;
else if( fabs(drag_dx = cursor_x-x1) < r && // x1,y1
fabs(drag_dy = cursor_y-y1) < r ) dragging = 9;
fabs(drag_dy = cursor_y-y1) < r ) dragging = 8;
else if( fabs(drag_dx = cursor_x-x1) < r && // x1,y1
fabs(drag_dy = cursor_y-y1) < r ) dragging = 9;