app/code/local/Untitled/Swatchrequest/Block/Adminhtml/Swatchrequest/Grid.php

gistfile1.php

<?php
/**
 * Un.titled
 *
 * @package Untitled_Swatchrequest
 * @copyright Un.titled Copyright (c) 2013 (http://un.titled.co.uk)
 */

class Untitled_Swatchrequest_Block_Adminhtml_Swatchrequest_Grid
  extends Mage_Adminhtml_Block_Widget_Grid
{
	/**
	 * Class Group path for Resource Collection
	 */
	const RESOURCE_COLLECTION = 'untitled_swatchrequest/swatchrequest_collection';

	/**
	 * Prepare base grid
	 */
	protected function _construct()
	{
		parent::_construct();

		$this->setId('untitled_swatchrequest_swatchrequest');
		$this->setDefaultSort('created_at');

		/**
		 * @TODO: Why??
		 */
		$this->setSaveParametersInSession(true);

		$this->setUseAjax(true);
	}

	/**
	 * Grid URL for AJAX request
	 *
	 * @return string
	 */
	public function getGridUrl()
	{
		return $this->getUrl('*/*/grid', array('_current' => true));
	}

	/**
	 * Assign Swatchrequest collection to grid block
	 *
	 * @return this
	 */
	protected function _prepareCollection()
	{
		/**
		 * @var Untitled_Swatchrequest_Model_Resource_Swatchrequest_Collection
		 */
		$collection = Mage::getResourceModel(self::RESOURCE_COLLECTION);
		$this->setCollection($collection);

		return parent::_prepareCollection();
	}

	/**
	 * Required to filter collection
	 *
	 * @TODO: really?
	 * @param $column
	 * @return $this
	 */
	protected function _addColumnFilterToCollection($column)
	{
		return parent::_addColumnFilterToCollection($column);
	}

	/**
	 * From Collection define columns and Export types
	 *
	 * @return $this
	 */
	protected function _prepareColumns()
	{
		$this->addColumn('id', array(
			'header' => $this->__('ID'),
			'index' => 'entity_id',
			'sortable' => true,
			'width' => '60px'
		));

		$this->addColumn('email', array(
			'header' => $this->__('Customer Email'),
			'index' => 'email',
		));

		$this->addColumn('created_at', array(
			'header' => $this->__('Created'),
			'type' =>'datetime',
			'index' => 'created_at'
		));

		$this->addColumn('name', array(
			'header' => $this->__('Customer Name'),
			'index' => 'name',
		));

		$this->addColumn('product_name', array(
			'header' => $this->__('Product Name'),
			'index' => 'product_name',
		));

		$this->addColumn('address', array(
			'header' => $this->__('Address Name'),
			'index' => 'address',
		));

		$this->addColumn('status', array(
			'header' => $this->__('Status'),
			'width' => '120',
			'align' => 'left',
			'index' => 'delivered_status',
			'type' => 'options',
			'options'   => array(
				0 => $this->__('Not Delivered'),
				1 => $this->__('Delivered')
			),
			'frame_callback' => array(
				$this, 'decorateStatus'
			)
		));

		$this->addExportType('*/*/exportCsv', $this->__('CSV'));
		$this->addExportType('*/*/exportXml', $this->__('XML'));

		return parent::_prepareColumns();
	}

	/**
	 * @return Mage_Adminhtml_Block_Widget_Grid
	 */
	protected function _prepareMassaction()
	{
		$this->setMassactionIdField('id');
		$this->getMassactionBlock()->setFormFieldName('swatchrequests');

		// delete en mass
		$this->getMassactionBlock()->addItem('delete', array(
			'label' => $this->__('Delete'),
			'url' => $this->getUrl('*/*/deleteMass'),
			'confirm' => $this->__('Are you sure?')
		));

		// update delivered status en mass
		$this->getMassactionBlock()->addItem('status', array(
			'label' => $this->__('Delivery Status'),
			'url' => $this->getUrl('*/*/updateMass'),
			'additional' => array(
				'visibility' => array(
					'name' => 'delivered_status',
					'type' => 'select',
					'class' => 'required-entry',
					'label' => $this->__('Status'),
					'values' => array(
						array(
							'label' => 'Not Delivered',
							'value' => 0
						),
						array(
							'label' => 'Delivered',
							'value' => 1
						)
					)
				)
			)
		));

		return parent::_prepareMassaction();
	}

	/**
	 * Get editable URL
	 *
	 * @param $row		Row in collection
	 * @return string
	 */
	public function getRowUrl($row)
	{
		return $this->getUrl('*/*/edit', array(
			'id' => $row->getId()
		));
	}

	/**
	 * Decorate Delivery Status column with a Badge
	 *
	 * @param $value	Value for $row
	 * @param $row		Row in collection
	 * @param $column
	 * @param $isExport
	 * @return string
	 */
	public function decorateStatus($value, $row, $column, $isExport)
	{
		$cell = '<span class="grid-severity-critical"><span>' . $value . '</span></span>';

		if($row->getDeliveredStatus() == 1) {
			$cell = '<span class="grid-severity-notice"><span>' . $value . '</span></span>';
		}

		return $cell;
	}
}