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void Snake::turnSnake(const int key)
{
    QPoint pos = components_of_snake.last().topLeft();
    QPoint temp = pos;
    bool wasTurned = false;
    if((key == Qt::Key_Right) && (side_turn != LEFT))
    {
        side_turn = RIGHT;
        pos.rx() += SIZE_OF_COMPONENT;
        wasTurned = true;
    }
    else if((key == Qt::Key_Left) && (side_turn != RIGHT))
    {
        side_turn = LEFT;
        pos.rx() -= SIZE_OF_COMPONENT;
        wasTurned = true;
    }
    else if((key == Qt::Key_Up) && (side_turn != DOWN))
    {
        side_turn = UP;
        pos.ry() -= SIZE_OF_COMPONENT;
        wasTurned = true;
    }
    else if((key == Qt::Key_Down) && (side_turn != UP))
    {
        side_turn = DOWN;
        pos.ry() += SIZE_OF_COMPONENT;
        wasTurned = true;
    }
    if(wasTurned)
    {
        components_of_snake.last().moveTo(pos);
        _cathUpHead(temp);
    }
}
                                 
        
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