PHPExcel根據某行設置單元格寬度

關於PHPExcel設置單元格寬度的問題，原類中自帶 setAutoSize 方法可以設置 $_autoSize 屬性 , 選擇是否適應一列最大寬度 , 默認值fasle;

$objPHPExcel = new PHPExcel();
$objWriter = new PHPExcel_Writer_Excel2007($objPHPExcel);

...

$objPHPExcel -> getActiveSheet() -> getColumnDimension(PHPExcel_Cell::stringFromColumnIndex(0)) -> setAutoSize(true); 

原理是循環遍歷計算所有單元格寬度 , 比較得到最大值作為該列寬度;

實際應用發現這樣生成得Excel並不是特別美觀 , 比如說列最長內容比該列標題要長的多時 , 標題行就會產生大量空白。由此想出兩種解決方案：

1.   根據標題行 ( 某一行 ) 內容長設置寬度；
2.   自動適應基礎上添加規則，遍歷得到的最大寬度不能超過標題寬度得n倍；

 

  ------------------------------------------------------------------------- 直接貼代碼 -------------------------------------------------------------------------

 

 第一種方案需要擴展兩個文件

  文件一：PHPExcel \ Worksheet \ ColumnDimension.php

 

//添加私有屬性 $_relySize
 
/**
* Rely size?
*
* @var bool
*/

private $_relySize        = false;

//添加獲取 $_relySize 的方法

/**
* Get Auto Size
*
* @return bool
*/

public function getRelySize() {
    return $this->_relySize;
}

//添加設置 $_relySize 的方法

/**
* Get Auto Size
*
* @param bool $pValue
* @return PHPExcel_Worksheet_ColumnDimension
*/

public function setRelySize($pValue = false) {
    $this->_relySize = (int) $pValue;
    return $this;
}

 

 

  文件二：PHPExcel \ Worksheet.php  — 找到 calculateColumnWidths 方法修改如下

    /**
     * Calculate widths for auto-size columns
     *
     * @param  boolean  $calculateMergeCells  Calculate merge cell width
     * @param  number  $row  Calculate merge cell width
     * @return PHPExcel_Worksheet;
     */
    public function calculateColumnWidths($calculateMergeCells = false)
    {
        // initialize $autoSizes array 
        $autoSizes = array();
        $relySizes = array();

        //$this->getColumnDimensions() 
        //獲取所有列
        
        foreach ($this->getColumnDimensions() as $colDimension) {
            if ($colDimension->getAutoSize()) {
                $autoSizes[$colDimension->getColumnIndex()] = -1;
            }

            if ($colDimension->getRelySize()) {
                $relySizes[$colDimension->getColumnIndex()] = $colDimension->getRelySize();
            }
        }

        // There is only something to do if there are some auto-size columns
        if (!empty($autoSizes)) {
            // build list of cells references that participate in a merge
            $isMergeCell = array();
            foreach ($this->getMergeCells() as $cells) {
                foreach (PHPExcel_Cell::extractAllCellReferencesInRange($cells) as $cellReference) {
                    $isMergeCell[$cellReference] = true;
                }
            }
                // loop through all cells in the worksheet 
            foreach ($this->getCellCollection(false) as $cellID) {
                $cell = $this->getCell($cellID);
                    //$this->_cellCollection->getCurrentColumn()
                if (isset($autoSizes[$this->_cellCollection->getCurrentColumn()])) {
                        // Determine width if cell does not participate in a merge
                    if (!isset($isMergeCell[$this->_cellCollection->getCurrentAddress()])) {
                            // Calculated value
                            // To formatted string
                        $cellValue = PHPExcel_Style_NumberFormat::toFormattedString(
                         $cell->getCalculatedValue(),
                         $this->getParent()->getCellXfByIndex($cell->getXfIndex())->getNumberFormat()->getFormatCode()
                         );

                        $autoSizes[$this->_cellCollection->getCurrentColumn()] = max(
                          (float) $autoSizes[$this->_cellCollection->getCurrentColumn()],
                          (float)PHPExcel_Shared_Font::calculateColumnWidth(
                            $this->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont(),
                            $cellValue,
                            $this->getParent()->getCellXfByIndex($cell->getXfIndex())->getAlignment()->getTextRotation(),
                            $this->getDefaultStyle()->getFont()
                            )
                          );
                    }
                }
            }

            // adjust column widths
            foreach ($autoSizes as $columnIndex => $width) {
                if ($width == -1) $width = $this->getDefaultColumnDimension()->getWidth();
                $this->getColumnDimension($columnIndex)->setWidth($width);
            }
        }

        if (!empty($relySizes)) {
            $isMergeCell = array();

            foreach ($this->getMergeCells() as $cells) {
                foreach (PHPExcel_Cell::extractAllCellReferencesInRange($cells) as $cellReference) {
                    $isMergeCell[$cellReference] = true;
                }
            }

            foreach ($relySizes as $col => $value) {
                $cell = $this->getCell($col.$value);

                if (isset($relySizes[$this->_cellCollection->getCurrentColumn()])) {
                    if (!isset($isMergeCell[$this->_cellCollection->getCurrentAddress()])) {
                        $cellValue = PHPExcel_Style_NumberFormat::toFormattedString($cell->getCalculatedValue(), $this->getParent()->getCellXfByIndex($cell->getXfIndex())->getNumberFormat()->getFormatCode() ); 
                        $relySizes[$this->_cellCollection->getCurrentColumn()] = (float)PHPExcel_Shared_Font::calculateColumnWidth($this->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont(), $cellValue, $this->getParent()->getCellXfByIndex($cell->getXfIndex())->getAlignment()->getTextRotation(), $this->getDefaultStyle()->getFont()) * 2;
                    }
                }
            }
            
            foreach ($relySizes as $columnIndex => $width) {
                if ($width == -1) $width = $this->getDefaultColumnDimension()->getWidth();
                $this->getColumnDimension($columnIndex)->setWidth($width);
            }
        }

        return $this;
    }

 

  執行調用 

$objPHPExcel = new PHPExcel();
$objWriter = new PHPExcel_Writer_Excel2007($objPHPExcel);

...

//根據第一行內容設置單元格寬度

$objPHPExcel -> getActiveSheet() -> getColumnDimension(PHPExcel_Cell::stringFromColumnIndex(0)) -> setRelySize(1); 

 

 

第二種方案沒有用到 , 所以沒有嘗試更改 , 如果有需求者大家可以一起討論。

 

 

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