SheetView.php

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<?php
class PHPExcel_Worksheet_SheetView
{
        private $_zoomScale                     = 100;

        private $_zoomScaleNormal       = 100;

    public function __construct()
    {
    }

        public function getZoomScale() {
                return $this->_zoomScale;
        }

        public function setZoomScale($pValue = 100) {
                // Microsoft Office Excel 2007 only allows setting a scale between 10 and 400 via the user interface,
                // but it is apparently still able to handle any scale >= 1
                if (($pValue >= 1) || is_null($pValue)) {
                        $this->_zoomScale = $pValue;
                } else {
                        throw new Exception("Scale must be greater than or equal to 1.");
                }
                return $this;
        }

        public function getZoomScaleNormal() {
                return $this->_zoomScaleNormal;
        }

        public function setZoomScaleNormal($pValue = 100) {
                if (($pValue >= 1) || is_null($pValue)) {
                        $this->_zoomScaleNormal = $pValue;
                } else {
                        throw new Exception("Scale must be greater than or equal to 1.");
                }
                return $this;
        }

        public function __clone() {
                $vars = get_object_vars($this);
                foreach ($vars as $key => $value) {
                        if (is_object($value)) {
                                $this->$key = clone $value;
                        } else {
                                $this->$key = $value;
                        }
                }
        }
}