function ajax_example_form_node_form_alter
Implements hook_form_FORM_ID_alter().
Adds two fields to the node form, second only appears after first is enabled.
File
-
ajax_example/
ajax_example_node_form_alter.inc, line 16
Code
function ajax_example_form_node_form_alter(&$form, &$form_state, $form_id) {
$node = $form['#node'];
$form['ajax_example_1'] = array(
'#type' => 'checkbox',
'#title' => t('AJAX Example 1'),
'#description' => t('Enable to show second field.'),
'#default_value' => $node->ajax_example['example_1'],
'#ajax' => array(
'callback' => 'ajax_example_form_node_callback',
'wrapper' => 'ajax-example-form-node',
'effect' => 'fade',
),
);
$form['container'] = array(
'#prefix' => '<div id="ajax-example-form-node">',
'#suffix' => '</div>',
);
// If the state values exist and 'ajax_example_1' state value is 1 or
// if the state values don't exist and 'example1' variable is 1 then
// display the ajax_example_2 field.
if (!empty($form_state['values']['ajax_example_1']) && $form_state['values']['ajax_example_1'] == 1 || empty($form_state['values']) && $node->ajax_example['example_1']) {
$form['container']['ajax_example_2'] = array(
'#type' => 'textfield',
'#title' => t('AJAX Example 2'),
'#description' => t('AJAX Example 2'),
'#default_value' => empty($form_state['values']['ajax_example_2']) ? $node->ajax_example['example_2'] : $form_state['values']['ajax_example_2'],
);
}
}