spanInZoomedModeIfTheCursorIsOut();
  public void prevCorner() {    int boardSize = board.getBoardSize();    byte other = (byte) (boardSize - CORNER_DEF-1);    switch (currentQuadrant()) {    case Graphics.TOP | Graphics.LEFT:      cursor.x = CORNER_DEF;      cursor.y = other;      break;    case Graphics.TOP | Graphics.RIGHT:      cursor.x = CORNER_DEF;      cursor.y = CORNER_DEF;      break;    case Graphics.BOTTOM | Graphics.RIGHT:      cursor.x = other;      cursor.y = CORNER_DEF;      break;    case Graphics.BOTTOM | Graphics.LEFT:      cursor.x = other;      cursor.y = other;      break;    }    canvas.refresh(canvas.getBoardPainter().getDrawArea());  }