add_subwindow(reset = new TracerReset(this, plugin, x1, y1));
y1 += reset->get_h() + margin;
add_subwindow(invert = new TracerInvert(this, plugin, x1, y1));
add_subwindow(reset = new TracerReset(this, plugin, x1, y1));
y1 += reset->get_h() + margin;
add_subwindow(invert = new TracerInvert(this, plugin, x1, y1));