| 1 |
<?php
|
| 2 |
|
| 3 |
// $Id$
|
| 4 |
|
| 5 |
/**
|
| 6 |
* Implementation of hook_help().
|
| 7 |
*/
|
| 8 |
function multipage_form_example_help($section) {
|
| 9 |
switch ($section) {
|
| 10 |
case 'admin/modules#description':
|
| 11 |
return t('An example module showing how to handle multipage forms in FAPI.');
|
| 12 |
case 'node/add#multipage_form_example':
|
| 13 |
return t('This will show you an example multipage form submission.');
|
| 14 |
}
|
| 15 |
}
|
| 16 |
|
| 17 |
/**
|
| 18 |
* Implementation of hook_menu().
|
| 19 |
*/
|
| 20 |
function multipage_form_example_menu($may_cache) {
|
| 21 |
$items = array();
|
| 22 |
|
| 23 |
if (!$may_cache) {
|
| 24 |
|
| 25 |
$items[] = array('title' => t('multipage form example'),
|
| 26 |
'path' => 'node/add/multipage_form_example',
|
| 27 |
'access' => TRUE,
|
| 28 |
);
|
| 29 |
}
|
| 30 |
|
| 31 |
return $items;
|
| 32 |
}
|
| 33 |
|
| 34 |
/**
|
| 35 |
* Implementation of hook_access().
|
| 36 |
*/
|
| 37 |
function multipage_form_example_access($op, $node) {
|
| 38 |
return TRUE;
|
| 39 |
}
|
| 40 |
|
| 41 |
/**
|
| 42 |
* Implementation of hook_node_info().
|
| 43 |
*/
|
| 44 |
function multipage_form_example_node_info() {
|
| 45 |
return array('multipage_form_example' => array('name' => t('multipage form example'), 'base' => 'multipage_form_example'));
|
| 46 |
}
|
| 47 |
|
| 48 |
/**
|
| 49 |
* Implementation of hook_form() for multipage_form_example. We don't set ANY
|
| 50 |
* #required attributes here - we leave that up to multipage_form_example_pre_render().
|
| 51 |
*/
|
| 52 |
function multipage_form_example_form(&$node) {
|
| 53 |
|
| 54 |
$form = array();
|
| 55 |
|
| 56 |
// 'checkboxes' elements are just ridiculously hard--i recommend just
|
| 57 |
// using a bunch of individual checkbox elements instead.
|
| 58 |
// I suspect that multiselects would also be pretty difficult...
|
| 59 |
|
| 60 |
// Here's a new form element, which enables you to store hidden values
|
| 61 |
// in an array. Check out the element definition functions at the bottom
|
| 62 |
// if you want to use this in a module. Keys show up in the
|
| 63 |
// $_POST/$form_values like:
|
| 64 |
// $_POST['edit']['test_hidden_array']['n'] = 'north'
|
| 65 |
// $form_values['test_hidden_array']['n'] = 'north'
|
| 66 |
|
| 67 |
$form['test_hidden_array'] = array(
|
| 68 |
'#type' => 'hidden_array',
|
| 69 |
'#values' => array('n' => 'north', 'e' => 'east', 'w' => 'west', 's' => 'south', ),
|
| 70 |
);
|
| 71 |
|
| 72 |
|
| 73 |
|
| 74 |
// Helper for our multipage - does field switching, sets options
|
| 75 |
// based on validated $form_values instead of $_POST, and so forth.
|
| 76 |
$form['#pre_render'] = array('multipage_form_example_pre_render');
|
| 77 |
|
| 78 |
// Title and body, page 1
|
| 79 |
$form['title'] = array(
|
| 80 |
'#type' => 'textfield',
|
| 81 |
'#title' => t('Title'),
|
| 82 |
'#default_value' => isset($node->title) ? $node->title : NULL,
|
| 83 |
'#description' => t("Enter a title for your favorites section."),
|
| 84 |
'#size' => 60,
|
| 85 |
'#maxlength' => 128,
|
| 86 |
);
|
| 87 |
$form['body'] = array(
|
| 88 |
'#type' => 'textarea',
|
| 89 |
'#title' => t('Description'),
|
| 90 |
'#default_value' => isset($node->body) ? $node->body : NULL,
|
| 91 |
'#description' => t('Add any additional info about your favorites.'),
|
| 92 |
'#rows' => 20,
|
| 93 |
);
|
| 94 |
|
| 95 |
// Person, page 2
|
| 96 |
$form['person'] = array(
|
| 97 |
// This is a fieldset, but has to be set as such in #pre_render,
|
| 98 |
// otherwise we either have the choice of displaying the <fieldset>
|
| 99 |
// all the time, or not passing through the values of its children.
|
| 100 |
'#title' => t('Your favorite person'),
|
| 101 |
);
|
| 102 |
$form['person']['fav_person'] = array(
|
| 103 |
'#type' => 'textfield',
|
| 104 |
'#title' => t('Name'),
|
| 105 |
'#default_value' => isset($node->fav_person) ? $node->fav_person : NULL,
|
| 106 |
'#description' => t('Enter their real name, or their code name if they like to fly stealth.'),
|
| 107 |
);
|
| 108 |
$form['person']['fav_person_desc'] = array(
|
| 109 |
'#type' => 'textarea',
|
| 110 |
'#title' => t('Description'),
|
| 111 |
'#default_value' => isset($node->fav_person_desc) ? $node->fav_person_desc : NULL,
|
| 112 |
'#description' => t('Juicy details go here...'),
|
| 113 |
);
|
| 114 |
$form['person']['fav_gummi'] = array(
|
| 115 |
'#type' => 'checkbox',
|
| 116 |
'#default_value' => isset($node->fav_gummi) ? $node->fav_gummi : 0,
|
| 117 |
'#title' => t('Do they like gummi bears?'),
|
| 118 |
);
|
| 119 |
|
| 120 |
// Color and number, page 3
|
| 121 |
$form['fav_color'] = array(
|
| 122 |
'#type' => 'select',
|
| 123 |
'#title' => t('Favorite color'),
|
| 124 |
'#default_value' => isset($node->fav_color) ? $node->fav_color : 'red',
|
| 125 |
'#options' => array('red' => t('Red'), 'green' => t('Green'), 'blue' => t('Blue'), 'yellow' => t('Yellow')),
|
| 126 |
);
|
| 127 |
$form['fav_number'] = array(
|
| 128 |
'#type' => 'textfield',
|
| 129 |
'#title' => t('Favorite number'),
|
| 130 |
'#default_value' => isset($node->fav_number) ? $node->fav_number : NULL,
|
| 131 |
);
|
| 132 |
|
| 133 |
// Movie and tv show, page 4
|
| 134 |
$form['fav_movie'] = array(
|
| 135 |
'#type' => 'textfield',
|
| 136 |
'#title' => t('Favorite movie'),
|
| 137 |
'#default_value' => isset($node->fav_movie) ? $node->fav_movie : NULL,
|
| 138 |
);
|
| 139 |
$form['fav_tv'] = array(
|
| 140 |
'#type' => 'radios',
|
| 141 |
'#title' => t('How often do you watch your favorite tv show?'),
|
| 142 |
'#default_value' => isset($node->fav_tv) ? $node->fav_tv : 'daily',
|
| 143 |
'#options' => array('daily' => t('Daily'), 'weekly' => t('Weekly'), 'monthly' => t('Monthly'),),
|
| 144 |
);
|
| 145 |
|
| 146 |
// Some markup elements to help the user see what they've already
|
| 147 |
// entered. Since the data won't be available until after the form
|
| 148 |
// is submitted, we'll only build the basic element here, and then
|
| 149 |
// we'll populate it in #pre_render
|
| 150 |
$form['person_display'] = array(
|
| 151 |
'#type' => 'markup',
|
| 152 |
);
|
| 153 |
$form['color_number_display'] = array(
|
| 154 |
'#type' => 'markup',
|
| 155 |
);
|
| 156 |
|
| 157 |
// Add a back button
|
| 158 |
$form['back'] = array(
|
| 159 |
'#type' => 'button',
|
| 160 |
'#value' => t('Back'),
|
| 161 |
'#weight' => 35,
|
| 162 |
);
|
| 163 |
|
| 164 |
|
| 165 |
return $form;
|
| 166 |
}
|
| 167 |
|
| 168 |
/**
|
| 169 |
* Implementation of hook_form_alter(). Here, we set up the 'page' field,
|
| 170 |
* which keeps track of what stage the form is in.
|
| 171 |
*/
|
| 172 |
function multipage_form_example_form_alter($form_id, &$form) {
|
| 173 |
|
| 174 |
// Make sure it's our multipage form.
|
| 175 |
if ($form_id == 'multipage_form_example_node_form') {
|
| 176 |
|
| 177 |
// Determine which page of the multipage form we're on. We don't do
|
| 178 |
// any incrementing here - that's something that our #pre_render'er
|
| 179 |
// will do when this page of the form has successfully validated.
|
| 180 |
$form['page'] = array('#type' => 'hidden', '#value' =>
|
| 181 |
isset($_POST['edit']['page']) ? $_POST['edit']['page'] : 1);
|
| 182 |
|
| 183 |
// If back button is pressed, back up the form stage, Also, if preview
|
| 184 |
// is hit we need to decrement the counter here to keep us on the same page.
|
| 185 |
if ($_POST['op'] == t('Back') || $_POST['op'] == t('Preview')) {$form['page']['#value']--;}
|
| 186 |
|
| 187 |
// This modifies the form for validation purposes. once validation is
|
| 188 |
// completed, it'll be called one more time (through Drupal's Form API)
|
| 189 |
// at which point it'll advance the form to the next page.
|
| 190 |
multipage_form_example_pre_render($form_id, $form, FALSE);
|
| 191 |
|
| 192 |
// Here we're augmenting the regular node form validation/submission with
|
| 193 |
// some of our own. Note that these are inside the conditional check for
|
| 194 |
// this particular form.
|
| 195 |
$form['#validate'] = array_merge($form['#validate'], array('multipage_form_example_validate' => array()));
|
| 196 |
$form['#submit'] = array_merge($form['#submit'], array('multipage_form_example_submit' => array()));
|
| 197 |
}
|
| 198 |
|
| 199 |
return $form;
|
| 200 |
}
|
| 201 |
|
| 202 |
/**
|
| 203 |
* Validate our form.
|
| 204 |
*/
|
| 205 |
function multipage_form_example_validate() {
|
| 206 |
global $form_values;
|
| 207 |
// validate our number, but don't bother if the back button was hit
|
| 208 |
if (($form_values['page'] == 3 ) && !is_numeric($form_values['fav_number']) && ($_POST['op'] != t('Back'))) {
|
| 209 |
form_set_error('fav_number', t('Favorite number is a <em>number</em>, dummy!'));
|
| 210 |
}
|
| 211 |
}
|
| 212 |
|
| 213 |
/**
|
| 214 |
* The #pre_render of a form allows us to make changes AFTER validation (unlike
|
| 215 |
* hook_form_alter()), but BEFORE the form has actually been displayed. We use
|
| 216 |
* it to control which form elements are shown, which are hidden, and which values
|
| 217 |
* to set based on validate elements, not $_POST. This is a necessity for our
|
| 218 |
* complicated multipage example form.
|
| 219 |
*/
|
| 220 |
function multipage_form_example_pre_render($form_id, &$form, $next_page = TRUE) {
|
| 221 |
|
| 222 |
global $form_values;
|
| 223 |
|
| 224 |
// Make sure it's our multipage form.
|
| 225 |
if ($form_id == 'multipage_form_example_node_form') {
|
| 226 |
|
| 227 |
// Are we ready for the next page in our form?
|
| 228 |
if ($next_page && isset($_POST['edit']['page']) && ($_POST['op'] != t('Back'))) {
|
| 229 |
$form['page']['#value'] = $form['page']['#value'] + 1;
|
| 230 |
}
|
| 231 |
|
| 232 |
// Validation errors? Show previous page for correcting.
|
| 233 |
if (form_get_errors()) { $form['page']['#value']--; }
|
| 234 |
|
| 235 |
// Modify the #required/#type values depending on our current page.
|
| 236 |
// The arrays tell us the pages the changes should take place in.
|
| 237 |
|
| 238 |
// Title/body, stage 1
|
| 239 |
$form['title']['#type'] = in_array($form['page']['#value'], array(1)) ? 'textfield' : 'hidden';
|
| 240 |
$form['title']['#required'] = in_array($form['page']['#value'], array(1)) ? 1 : 0;
|
| 241 |
$form['body']['#type'] = in_array($form['page']['#value'], array(1)) ? 'textarea' : 'hidden';
|
| 242 |
|
| 243 |
// Person, stage 2
|
| 244 |
$form['person']['#type'] = in_array($form['page']['#value'], array(2)) ? 'fieldset' : NULL;
|
| 245 |
$form['person']['fav_person']['#type'] = in_array($form['page']['#value'], array(2)) ? 'textfield' : 'hidden';
|
| 246 |
$form['person']['fav_person']['#required'] = in_array($form['page']['#value'], array(2)) ? 1 : 0;
|
| 247 |
$form['person']['fav_person_desc']['#type'] = in_array($form['page']['#value'], array(2)) ? 'textarea' : 'hidden';
|
| 248 |
$form['person']['fav_person_desc']['#required'] = in_array($form['page']['#value'], array(2)) ? 1 : 0;
|
| 249 |
$form['person']['fav_gummi']['#type'] = in_array($form['page']['#value'], array(2)) ? 'checkbox' : 'hidden';
|
| 250 |
|
| 251 |
// Color and number, page 3
|
| 252 |
$form['fav_color']['#type'] = in_array($form['page']['#value'], array(3)) ? 'select' : 'hidden';
|
| 253 |
$form['fav_color']['#required'] = in_array($form['page']['#value'], array(3)) ? 1 : 0;
|
| 254 |
$form['fav_number']['#type'] = in_array($form['page']['#value'], array(3)) ? 'textfield' : 'hidden';
|
| 255 |
$form['fav_number']['#required'] = in_array($form['page']['#value'], array(3)) ? 1 : 0;
|
| 256 |
|
| 257 |
// Movie and tv show, page 4
|
| 258 |
$form['fav_movie']['#type'] = in_array($form['page']['#value'], array(4)) ? 'textfield' : 'hidden';
|
| 259 |
$form['fav_movie']['#required'] = in_array($form['page']['#value'], array(4)) ? 1 : 0;
|
| 260 |
// this bit of trickery is because radios is a bit of a special case -- it's an 'expanding' form element,
|
| 261 |
// which means that the multiple buttons get built by form_builder. Because the building for display actually
|
| 262 |
// happens when the form is still set to stage 3, we have to build it as a radios type in stage 3, or nothing will
|
| 263 |
// display on stage 4! form_hide_elements is a little helper function that recurses through and hides
|
| 264 |
// all of the buttons we built if we don't actually happen to be displaying stage 4. whew!
|
| 265 |
$form['fav_tv']['#type'] = in_array($form['page']['#value'], array(4)) ? 'radios' : ($next_page ? hide_form_elements($form['fav_tv']) : 'radios');
|
| 266 |
$form['fav_tv']['#required'] = in_array($form['page']['#value'], array(4)) ? 1 : 0;
|
| 267 |
|
| 268 |
// The progress display for stuff we've already entered
|
| 269 |
$person_display = t('Your favorite person is %person, and they %like gummi bears.<br \>', array('%person' => check_plain($form_values['fav_person']), '%like' => ($form_values['fav_gummi'] ? t('like') : t('don\'t like'))));
|
| 270 |
$color_number_display = t('Your favorite color is %color, and your favorite number is %number.', array('%color' => check_plain($form_values['fav_color']), '%number' => check_plain($form_values['fav_number'])));
|
| 271 |
|
| 272 |
$form['person_display']['#value'] = in_array($form['page']['#value'], array(3,4)) ? $person_display : '';
|
| 273 |
$form['color_number_display']['#value'] = in_array($form['page']['#value'], array(4)) ? $color_number_display : '';
|
| 274 |
|
| 275 |
// Buttons -- like radios, they need to be properly built in the previous stage, so here we also do the switches at
|
| 276 |
// the last chance we have. Notice that the type gets set to 'value' and not 'hidden', b/c hidden will screw w/
|
| 277 |
// $_POST['op']
|
| 278 |
if ($next_page) {
|
| 279 |
$form['back']['#type'] = in_array($form['page']['#value'], array(2,3,4)) ? 'button' : 'value';
|
| 280 |
$form['preview']['#type'] = in_array($form['page']['#value'], array(4)) ? 'button' : 'value';
|
| 281 |
$form['submit']['#type'] = in_array($form['page']['#value'], array(4)) ? 'submit' : 'button';
|
| 282 |
$submit_text = array(NULL, t('Next (person)'), t('Next (color/number)'), t('Next (tv/movie)'), t('Submit'));
|
| 283 |
$form['submit']['#value'] = $submit_text[$form['page']['#value']];
|
| 284 |
}
|
| 285 |
}
|
| 286 |
}
|
| 287 |
|
| 288 |
// Handles form submission. We're just throwing our data into the variable
|
| 289 |
// table to keep things simple
|
| 290 |
function multipage_form_example_submit() {
|
| 291 |
global $form_values;
|
| 292 |
foreach ($form_values as $key => $value) {
|
| 293 |
if (in_array($key, array('fav_person', 'fav_person_desc', 'fav_gummi', 'fav_color', 'fav_number', 'fav_movie', 'fav_tv',))) {
|
| 294 |
$array[$key] = $value;
|
| 295 |
}
|
| 296 |
}
|
| 297 |
variable_set('multipage_form_example_'. $form_values['nid'], $array);
|
| 298 |
}
|
| 299 |
|
| 300 |
/**
|
| 301 |
* Implementation of hook_load().
|
| 302 |
*
|
| 303 |
* Now that we've defined how to manage the node data in the database, We
|
| 304 |
* need to tell Drupal how to get the node back out. This hook is called
|
| 305 |
* every time a node is loaded, and allows us to do some loading of our own.
|
| 306 |
*/
|
| 307 |
function multipage_form_example_load($node) {
|
| 308 |
$additions = variable_get('multipage_form_example_'. $node->nid, NULL);
|
| 309 |
$additions = (object) $additions;
|
| 310 |
return $additions;
|
| 311 |
}
|
| 312 |
|
| 313 |
/**
|
| 314 |
* Implementation of hook_delete().
|
| 315 |
*
|
| 316 |
* Clean up our data in variable table.
|
| 317 |
*/
|
| 318 |
function multipage_form_example_delete($node) {
|
| 319 |
// Notice that we're matching all revision, by using the node's nid.
|
| 320 |
variable_del('multipage_form_example_'. $node->nid);
|
| 321 |
}
|
| 322 |
|
| 323 |
/**
|
| 324 |
* Implementation of hook_view().
|
| 325 |
*
|
| 326 |
* This is a typical implementation that simply runs the node text through
|
| 327 |
* the output filters.
|
| 328 |
*/
|
| 329 |
function multipage_form_example_view(&$node, $teaser = FALSE, $page = FALSE) {
|
| 330 |
$node = node_prepare($node, $teaser);
|
| 331 |
$favorites = theme('multipage_form_example', $node);
|
| 332 |
$node->body .= $favorites;
|
| 333 |
$node->teaser .= $favorites;
|
| 334 |
}
|
| 335 |
|
| 336 |
/**
|
| 337 |
* A custom theme function.
|
| 338 |
*
|
| 339 |
* By using this function to format our node-specific information, themes
|
| 340 |
* can override this presentation if they wish. We also wrap the default
|
| 341 |
* presentation in a CSS class that is prefixed by the module name. This
|
| 342 |
* way, style sheets can modify the output without requiring theme code.
|
| 343 |
*/
|
| 344 |
function theme_multipage_form_example($node) {
|
| 345 |
|
| 346 |
$person_display = t('Your favorite person is %person, and they %like gummi bears. <br \>', array('%person' => check_plain($node->fav_person), '%like' => ($node->fav_gummi ? t('like') : t('don\'t like'))));
|
| 347 |
$color_number_display = t('Your favorite color is %color, and your favorite number is %number. <br \>', array('%color' => check_plain($node->fav_color), '%number' => check_plain($node->fav_number)));
|
| 348 |
$tv_movie_display = t('Your favorite movie is %movie, and you watch your favorite tv show %watch.', array('%movie' => check_plain($node->fav_movie), '%watch' => check_plain($node->fav_tv)));
|
| 349 |
|
| 350 |
$output = '<div class="multipage_form_example">';
|
| 351 |
$output .= $person_display . $color_number_display . $tv_movie_display;
|
| 352 |
$output .= '</div>';
|
| 353 |
return $output;
|
| 354 |
}
|
| 355 |
|
| 356 |
/**
|
| 357 |
* A little helper function to hide the child elements of 'radios'.
|
| 358 |
*/
|
| 359 |
function hide_form_elements(&$element) {
|
| 360 |
foreach (element_children($element) as $key) {
|
| 361 |
$element[$key]['#type'] = 'hidden';
|
| 362 |
}
|
| 363 |
return 'hidden';
|
| 364 |
}
|
| 365 |
|
| 366 |
/**
|
| 367 |
* Playing around here with a new form element to enable storing hidden values in an array fashion.
|
| 368 |
* Seems to work fine. Check out $form['test_hidden_array'] above for how to structure the form
|
| 369 |
* element
|
| 370 |
*/
|
| 371 |
function multipage_form_example_elements() {
|
| 372 |
$type['hidden_array'] = array('#input' => TRUE, '#process' => array('expand_hidden_array' => array()), '#tree' => TRUE);
|
| 373 |
return $type;
|
| 374 |
}
|
| 375 |
|
| 376 |
function expand_hidden_array($element) {
|
| 377 |
$values = is_array($element['#values']) ? $element['#values'] : array();
|
| 378 |
$element['#tree'] = TRUE;
|
| 379 |
foreach ($values as $key => $value) {
|
| 380 |
$element[$key] = array('#type' => 'hidden', '#processed' => TRUE, '#value' => $value);
|
| 381 |
}
|
| 382 |
return $element;
|
| 383 |
}
|
| 384 |
|
| 385 |
function theme_hidden_array ($element) {
|
| 386 |
return $element['#children'];
|
| 387 |
}
|
Parent Directory
| 
Revision Log
| 
Revision Graph