Magento Backend Product list grid - magento

Question

Does anyone know how to add a field containing an input type text element or a dropdown element to a magento backend product list grid?
I managed to add a new column to my custom module backend product listing grid like this:
$this->addColumn('blabla', array(
'header' => Mage::helper('customer')->__('On Hold?'),
'width' => '120',
'index' => 'bla',
'type' => 'options',
'options' => array('1' => 'Yes', '0' => 'No')
));
but this command only adds the dropdown to my grid header, while i need the dropdown to appear in the left side of every product listed on that grid (just like the checkbox appears when you go for instance in backend on a product edit page and you select related products, or upsell products)

Answer 1

Simple and fast solution as tip for next research - rewrite Mage_Adminhtml_Block_Catalog_Product_Grid, function _prepareColumns. Example you will create your block Module_Name_Block_Sample:
class Module_Name_Block_Sample extends Mage_Adminhtml_Block_Catalog_Product_Grid
{
protected function _prepareColumns()
{
$this->addColumn('blabla', array(
'header' => Mage::helper('customer')->__('On Hold?'),
'width' => '120',
'index' => 'bla',
'type' => 'options',
'options' => array('1' => 'Yes', '0' => 'No')
));
return parent::_prepareColumns();
}
}
You will get it as first field. And it may need rewrite _prepareCollection.
But it may be not better solution, I know.

Answer 2

What you need is a custom renderer, where you can display any HTML you want. Something like this:
$this->addColumn('blabla', array(
'header' => Mage::helper('customer')->__('On Hold?'),
'width' => '120',
'index' => 'bla',
'renderer' => 'module/sample_grid_renderer'
));
And then you create your renderer class, where you create HTML you need:
class Module_Name_Block_Sample_Grid_Renderer
extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
{
public function render(Varien_Object $row)
{
$html = '<select name="row'.$row->getId().'"></select>';
return $html;
}
}

Answer 3

$country = $fieldset->addField('country', 'select', array(
'name' => 'country',
'label' => 'Country',
'values' => Mage::getModel('adminhtml/system_config_source_country') ->toOptionArray()
));
Try it! Have a nice day. Thank you.