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<?php
/**
* CCheckBoxColumn class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
Yii::import('zii.widgets.grid.CGridColumn');
/**
* CCheckBoxColumn represents a grid view column of checkboxes.
*
* CCheckBoxColumn supports no selection (read-only), single selection and multiple selection.
* The mode is determined according to {@link selectableRows}. When in multiple selection mode, the header cell will display
* an additional checkbox, clicking on which will check or uncheck all of the checkboxes in the data cells.
*
* Additionally selecting a checkbox can select a grid view row (depending on {@link CGridView::selectableRows} value) if
* {@link selectableRows} is null (default).
*
* By default, the checkboxes rendered in data cells will have the values that are the same as
* the key values of the data model. One may change this by setting either {@link name} or
* {@link value}.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package zii.widgets.grid
* @since 1.1
*/
class CCheckBoxColumn extends CGridColumn
{
/**
* @var string the attribute name of the data model. The corresponding attribute value will be rendered
* in each data cell as the checkbox value. Note that if {@link value} is specified, this property will be ignored.
* @see value
*/
public $name;
/**
* @var string a PHP expression that will be evaluated for every data cell and whose result will be rendered
* in each data cell as the checkbox value. In this expression, the variable
* <code>$row</code> the row number (zero-based); <code>$data</code> the data model for the row;
* and <code>$this</code> the column object.
*/
public $value;
/**
* @var string a PHP expression that will be evaluated for every data cell and whose result will
* determine if checkbox for each data cell is checked. In this expression, the variable
* <code>$row</code> the row number (zero-based); <code>$data</code> the data model for the row;
* and <code>$this</code> the column object.
* @since 1.1.4
*/
public $checked;
/**
* @var array the HTML options for the data cell tags.
*/
public $htmlOptions=array('class'=>'checkbox-column');
/**
* @var array the HTML options for the header cell tag.
*/
public $headerHtmlOptions=array('class'=>'checkbox-column');
/**
* @var array the HTML options for the footer cell tag.
*/
public $footerHtmlOptions=array('class'=>'checkbox-column');
/**
* @var array the HTML options for the checkboxes.
*/
public $checkBoxHtmlOptions=array();
/**
* @var integer the number of rows that can be checked.
* Possible values:
* <ul>
* <li>0 - the state of the checkbox cannot be changed (read-only mode)</li>
* <li>1 - only one row can be checked. Checking a checkbox has nothing to do with selecting the row</li>
* <li>2 or more - multiple checkboxes can be checked. Checking a checkbox has nothing to do with selecting the row</li>
* <li>null - {@link CGridView::selectableRows} is used to control how many checkboxes can be checked.
* Cheking a checkbox will also select the row.</li>
* </ul>
* You may also call the JavaScript function <code>$.fn.yiiGridView.getChecked(containerID,columnID)</code>
* to retrieve the key values of the checked rows.
* @since 1.1.6
*/
public $selectableRows=null;
/**
* Initializes the column.
* This method registers necessary client script for the checkbox column.
*/
public function init()
{
if(isset($this->checkBoxHtmlOptions['name']))
$name=$this->checkBoxHtmlOptions['name'];
else
{
$name=$this->id;
if(substr($name,-2)!=='[]')
$name.='[]';
$this->checkBoxHtmlOptions['name']=$name;
}
$name=strtr($name,array('['=>"\\[",']'=>"\\]"));
if($this->selectableRows===null)
{
if(isset($this->checkBoxHtmlOptions['class']))
$this->checkBoxHtmlOptions['class'].=' select-on-check';
else
$this->checkBoxHtmlOptions['class']='select-on-check';
return;
}
$cball=$cbcode='';
if($this->selectableRows==0)
{
//.. read only
$cbcode="return false;";
}
elseif($this->selectableRows==1)
{
//.. only one can be checked, uncheck all other
$cbcode="$(\"input:not(#\"+this.id+\")[name='$name']\").prop('checked',false);";
}
else
{
//.. process check/uncheck all
$cball=<<<CBALL
$('#{$this->id}_all').live('click',function() {
var checked=this.checked;
$("input[name='$name']").each(function() {this.checked=checked;});
});
CBALL;
$cbcode="$('#{$this->id}_all').prop('checked', $(\"input[name='$name']\").length==$(\"input[name='$name']:checked\").length);";
}
$js=$cball;
$js.=<<<EOD
$("input[name='$name']").live('click', function() {
$cbcode
});
EOD;
Yii::app()->getClientScript()->registerScript(__CLASS__.'#'.$this->id,$js);
}
/**
* Renders the header cell content.
* This method will render a checkbox in the header when {@link selectableRows} is greater than 1
* or in case {@link selectableRows} is null when {@link CGridView::selectableRows} is greater than 1.
*/
protected function renderHeaderCellContent()
{
if($this->selectableRows===null && $this->grid->selectableRows>1)
echo CHtml::checkBox($this->id.'_all',false,array('class'=>'select-on-check-all'));
else if($this->selectableRows>1)
echo CHtml::checkBox($this->id.'_all',false);
else
parent::renderHeaderCellContent();
}
/**
* Renders the data cell content.
* This method renders a checkbox in the data cell.
* @param integer $row the row number (zero-based)
* @param mixed $data the data associated with the row
*/
protected function renderDataCellContent($row,$data)
{
if($this->value!==null)
$value=$this->evaluateExpression($this->value,array('data'=>$data,'row'=>$row));
else if($this->name!==null)
$value=CHtml::value($data,$this->name);
else
$value=$this->grid->dataProvider->keys[$row];
$checked = false;
if($this->checked!==null)
$checked=$this->evaluateExpression($this->checked,array('data'=>$data,'row'=>$row));
$options=$this->checkBoxHtmlOptions;
$name=$options['name'];
unset($options['name']);
$options['value']=$value;
$options['id']=$this->id.'_'.$row;
echo CHtml::checkBox($name,$checked,$options);
}
}
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