private void onNewHotPointY(boolean briefIntroduction) {
final int count = model.getRowCount();
hotPointX = hotPointY < count ? initialHotPointX : 0;
cellShift = 0;
environment.onAreaNewHotPoint(this);
if (hotPointY < count)
appearance.introduceRow(model, hotPointY, briefIntroduction ? INTRODUCTION_BRIEF : 0);
else environment.hint(Hints.EMPTY_LINE);
}
