locomotivemtl / charcoal-cms

     * @throws InvalidArgumentException If the parameter is not numeric or < 0.

     * @return self

     */

    public function setPage($page)

    {

        if (!is_numeric($page)) {

            throw new InvalidArgumentException(

                'Page number needs to be numeric.'

            );

        }

        $page = (int)$page;

        if ($page < 0) {

            throw new InvalidArgumentException(

                'Page number needs to be >= 0.'

            );

        }

        $this->page = $page;

        return $this;

    }

    /**

     * Retrieve the widget's title.

     * @throws InvalidArgumentException If the parameter is not numeric or < 0.

     * @return self

     */

    public function setNumPerPage($num)

    {

        if (!is_numeric($num)) {

            throw new InvalidArgumentException(

                'Num-per-page needs to be numeric.'

            );

        }

        $num = (int)$num;

        if ($num < 0) {

            throw new InvalidArgumentException(

                'Num-per-page needs to be >= 0.'

            );

        }

        $this->numPerPage = $num;

        return $this;

    }

    /**

     * Retrieve the current widget's options as a JSON object.