set values to fields in adminhtml form template

Question

I'd created a template file for admin form tab as:

class Excellence_Designer_Block_Adminhtml_Designer_Edit_Tabs extends Mage_Adminhtml_Block_Widget_Tabs {
 protected function _beforeToHtml() {
 $this->addTab('images', array(
 'label' => Mage::helper('designer')->__('Images'),
 'title' => Mage::helper('designer')->__('Images'),
 'content' => $this->getLayout()->createBlock('designer/adminhtml_designer_edit_tab_images')->toHtml(),
 ));
 return parent::_beforeToHtml();
 }
}

---

class Excellence_Designer_Block_Adminhtml_Designer_Edit_Tab_Images extends
Mage_Adminhtml_Block_Template implements
Mage_Adminhtml_Block_Widget_Tab_Interface {
 public function _construct() {
 parent::_construct();
 $this->setTemplate('designer/edit/tab/images.phtml');
 }
 public function getTabLabel() {
 return $this->__('Images');
 }
 public function getTabTitle() {
 return $this->__('Images');
 }
 public function canShowTab() {
 return true;
 }
 public function isHidden() {
 return false;
 }
}

---

images.phtml

<div class="input-field">
 <label for="image">Custom Field</label>
 <input type="text" class="input-text" name="image" id="image" />
</div>

but there's no value in there if I do want to edit the form

screen shot even the value is saved in database. The other tab was created with Mage_Adminhtml_Block_Widget_Form and showing the values in fields but for this how could I get the value?

Answer 1

I'd come to a solution don't know is it the right approach but works in my case. If you have a better solution then let me know.

I'd made a change in images.phtml

<div class="input-field">
 <label for="image">Custom Field</label>
 <input type="text" value="<?php echo $this->getValue(); ?>" class="input-text" name="image" id="image" />
</div>

and added a method in the respective block file

public function getValue() {
 return Mage::registry('designer_data')->getImage();
}