}
+void Canvas::clear(int flush)
+{
+ if( refresh_frame )
+ refresh_frame->clear_frame();
+ BC_WindowBase *wdw = get_canvas();
+ if( !wdw ) return;
+ wdw->set_bg_color(BLACK);
+ wdw->clear_box(0,0, wdw->get_w(), wdw->get_h());
+ wdw->flash(flush);
+}