This is probably not the most efficient way to do this, but maybe this will give some ideas. I did this in a custom Drupal 5 theme. This is slightly different to your requirement, in that there is no "Next" link shown if we are the last sibling. (And same for the "Previous" link.)
robin
======================================================================== ======= In node-<your_type>.tpl.php ======================================================================== ======= <?php print get_prev_link($node->path); ?>
or
<?php print get_next_link($node->path); ?>
======================================================================== ======= In template.php ======================================================================== ======= /** * Returns an array of the paths of all the nodes with the same parent menu item * as the current_path. */ function _get_sibling_paths($current_path) {
$paths = array();
// Find the Parent ID (pid) of this menu item. $sql = "select m.pid from {menu} m, {url_alias} u where m.path = u.src and u.dst = '" . $current_path . "'"; $menu_pid = db_result(db_query($sql));
// Use the pid to find all paths $sql = "select m.mid, m.pid, m.path, u.dst from {menu} m, {url_alias} u where m.path = u.src and m.pid = " . $menu_pid . " order by m.weight"; $result = db_query(db_rewrite_sql($sql)); while ($data = db_fetch_object($result)) { $paths[] = $data->dst; }
return $paths; }
function get_next_link($current_path) {
$next_path; $paths = _get_sibling_paths($current_path); foreach ($paths as $path) { if ($found) { $next_path = $path; break; } if (strcmp($path,$current_path) == 0) { $found = true; } } if (isset($next_path)) { return l('<img alt="Next" title="Next" src="/files/right.png" height="36" width="36" />', $next_path, null, null, null, null, true); } return ""; }
function get_prev_link($current_path) {
$prev_path; $paths = _get_sibling_paths($current_path); foreach ($paths as $path) { if (strcmp($path,$current_path) == 0) { break; } $prev_path = $path; } if (isset($prev_path)) { return l('<img alt="Previous" title="Previous" src="/files/left.png" height="36" width="36" />', $prev_path, null, null, null, null, true); } return '<img alt="Previous" title="Previous" src="/files/left.png" height="36" width="36" style="visibility: hidden;" />'; } ======================================================================== =======
-----Original Message----- From: support-bounces@drupal.org [mailto:support-bounces@drupal.org] On Behalf Of John Fletcher Sent: 20 March 2009 08:26 To: support@drupal.org Subject: [support] Next and last menu item
I've got a standard navigation-type menu with my pages in it, and a requirement to show a kind of "back and forward arrow" on each page in Drupal 6. The back arrow takes you to the previous page in the menu and the forward arrow takes you to the next page in the menu, and the title of the relevant page is printed next to the arrows. Like: Home <- | -> About us
The "previous page" means the previous sibling menu item or if none, parent item. The "next page" mean the child menu item or, if none, next sibling item, or if none, next sibling of parent item.
I had a look around the menu API but can't put my finger on the most efficient way to do this. Anyone know?
Regards, Fletch
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