/** * Renders header of the column * * @return string */ public function renderHeader() { if ($this->getColumn()->getHeader()) { return parent::renderHeader(); } $checked = ''; if ($filter = $this->getColumn()->getFilter()) { $checked = $filter->getValue() ? ' checked="checked"' : ''; } $disabled = ''; if ($this->getColumn()->getDisabled()) { $disabled = ' disabled="disabled"'; } $html = '<input type="checkbox" '; $html .= 'name="' . $this->getColumn()->getFieldName() . '" '; $html .= 'onclick="' . $this->getColumn()->getGrid()->getJsObjectName() . '.checkCheckboxes(this)" '; $html .= 'class="checkbox"' . $checked . $disabled . ' '; $html .= 'title="' . Mage::helper('Mage_Backend_Helper_Data')->__('Select All') . '"/>'; return $html; }