老葛的Drupal培训班 Think in Drupal
下面是一个表单的简单示例，它允许使用AHAH来动态替换一些文本。按钮使用throbber来指示用户应该继续等待，如图10-18所示。这里是sites/all/modules/custom/poof/poof.info：
; $Id$
name = Poof
description = Demonstrates AHAH forms.
package = Pro Drupal Development
core = 6.x
而下面则是sites/all/modules/custom/poof/poof.module：
<?php
/**
* Implementation of hook_menu().
*/
function poof_menu() {
$items['poof'] = array(
'title' => 'Ahah!',
'page callback' => 'drupal_get_form',
'page arguments' => array('poof_form'),
'access arguments' => array('access content'),
);
$items['poof/message_js'] = array(
'page callback' => 'poof_message_js',
'type' => MENU_CALLBACK,
'access arguments' => array('access content'),
);
return $items;
}
/**
* Form definition.
*/
function poof_form() {
$form['target'] = array(
'#type' => 'markup',
'#prefix' => '<div id="target">',
'#value' => t('Click the button below. I dare you.'),
'#suffix' => '</div>',
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Click Me'),
'#ahah' => array(
'event' => 'click',
'path' => 'poof/message_js',
'wrapper' => 'target',
'effect' => 'fade',
)
);
return $form;
}
/**
* Menu callback for AHAH additions.
*/
function poof_message_js() {
$output = t('POOF!');
drupal_json(array('status' => TRUE, 'data' => $output));
}
图 10-18.点击按钮后，将会显示一个圆形的转动的throbber图标，之后将会进行基于AHAH的文本替换。
