Rectangle rect = new Rectangle(
offsetX + d * ROOM_CELL_WIDTH,
offsetY + t * ROOM_CELL_HEIGHT,
ROOM_CELL_WIDTH,
ROOM_CELL_HEIGHT * c.GetDuration());
g.setColor(Color.BLACK);
g.drawRect(rect.x, rect.y, rect.width, rect.height);
str = String.format("%s\n%s\n/", c.GetCourse().GetName(), c.GetLecturer().GetName());