update_widget(math_view, event->area.x, event->area.y, event->area.width, event->area.height); #if 0
gtk_math_view_expose_event(GtkWidget* widget,			   GdkEventExpose* event,			   GtkMathView* math_view){  g_return_val_if_fail(widget != NULL, FALSE);  g_return_val_if_fail(event != NULL, FALSE);  g_return_val_if_fail(math_view != NULL, FALSE);  //printf("widget expose %f %f %f %f\n", (double) event->area.x, (double) event->area.y, (double) event->area.width, (double) event->area.height);  gdk_draw_pixmap(widget->window,		  widget->style->fg_gc[GTK_WIDGET_STATE(widget)],		  math_view->pixmap,		  event->area.x, event->area.y,		  event->area.x, event->area.y,		  event->area.width, event->area.height);  return FALSE;}