Multi-level wp_nav_menu return children

  • Resolved Paul Wright

    (@signyourbikeout)


    13 years, 7 months ago

    Hello,

    Wondering if someone could point me in the right direction. I’m using wp_nav_menu with subpages to make a second-tier menu. I have split the template code so that the main nav always stays 1 level, but on pages that have subpages, a second menu appears inside the page template.

    I’m using the following code and it works just fine, showing the child pages of the current page only if they exist. But when you go to the subpages, that subnav disappears. It reminds me of the old category highlighting on single.php problems of yore. Can anyone help me modify it so that the function not only returns child pages of the current page, but also returns them when viewing one of those children?

    function my_custom_nav($elements) {
	global $wp_query;
	$queried_id = $wp_query->queried_object_id;
	$child_items = array();
	$parents = array();
	foreach( $elements as $key => $element )
	{
		if( $element->object_id == $queried_id )
			$parents[] = $element->ID;
		if( in_array($element->menu_item_parent, $parents) )
			$child_items[] = $element;
  	}
	return $child_items;
}

    and then in the template I call wp_nav_menu again. The code come from Utkarsh Kukreti’s comment in this article https://wpquestions.com/question/show/id/882

    Paul

Viewing 5 replies - 1 through 5 (of 5 total)
  • Thread Starter Paul Wright

    (@signyourbikeout)

    I just can’t seem to add another if statement, testing for something like ‘ancestor’ in the $parents array. Anyone know what I should be testing for there?

    Thread Starter Paul Wright

    (@signyourbikeout)

    I’m working away at this, but am having trouble translating object ID and element ID. Not 100% what the object ID is.

    From what I see, the function above (in reverse):

    adds the element to the child item array only if the element’s parent exists in the parent array.

    To get items added to the parent array, the queried id must = the element’s object ID.

    I believe I need to add more items to the parent array. I can successfully add the current page’s ancestor’s IDs, but the function is looking for object ID’s and so doesn’t find anything.

    Thread Starter Paul Wright

    (@signyourbikeout)

    Well,

    While it is less than ideal, I have settled on a solution that uses the wp_nav_menu for the main nav and then wp_list_pages (with a call for children of current pages’ parent) for the subnav on pages that have one.

    Paul

    Paul,

    I came up with a css approach to the issue, as I wanted to have a sub-menu type navigation in the sidebar. I don’t know if it’s exactly what you’re searching for, but it’ll be a good start:

    1. First, I call the menu function in the sidebar, and wrap it in a

    <ul> with a new ID:
<ul id="sidebarSubMenu">
<?php wp_nav_menu(array( 'items_wrap' => '%3$s' )); ?>
</ul>

    2. Next, I do some CSS styling. I just started this code yesterday, so it’s not polished to say the least. I should note that I’m using a language plugin (WPML?) that wraps all the menus in a ‘div’ tag right below that first ‘ul’. Essentially, I check to see if the ‘li’ or ‘ul’ has a class, or its ancestor has a class, of either current-menu-item, current-menu-parent, or current-menu-ancestor. I’m only using two levels deep, so you may need to re-work the code for deeper navigation sets.

    ul#sidebarSubMenu {}
ul#sidebarSubMenu li {display: none; margin: 4px;}
ul#sidebarSubMenu a {text-decoration: none; font-size: 19px; letter-spacing: 1px; color: #333;}
ul#sidebarSubMenu a:hover {padding: 0 5px 0 10px; background-color: #d0d0d0; color: #000;}
ul#sidebarSubMenu .current-menu-item {font-weight: bold;}
ul#sidebarSubMenu .current-menu-item > ul {font-weight: normal;}
ul#sidebarSubMenu li.current-menu-parent, ul#sidebarSubMenu li.current-menu-ancestor {display: block;}
ul#sidebarSubMenu li.current-menu-ancestor *, ul#sidebarSubMenu li.current-menu-parent *, ul#sidebarSubMenu li.current-page-item * {display: block;}
ul#sidebarSubMenu > div > li > a {cursor: default; font-weight: bold; padding: 2px; font-size: 20px; text-transform: uppercase; width: 190px; border-bottom: 1px solid #ccc;}
ul#sidebarSubMenu > div > li > a:hover {padding: 2px; background-color: #fff; color: #333;}
ul#sidebarSubMenu ul.sub-menu ul.sub-menu {display: none;}
ul#sidebarSubMenu ul.sub-menu ul.sub-menu > li a {margin-right: 6px; font-size: 15px;}
ul#sidebarSubMenu li.current-page-ancestor > ul.sub-menu * {display: block;}
ul#sidebarSubMenu li.current-menu-item > ul.sub-menu {display: block;}
ul#sidebarSubMenu li.current-page-ancestor ul.sub-menu {display: block;}

    Let me know if this approach works for you. If you clean up the css, I’d like to take a look at it.

    -Eric

    Thread Starter Paul Wright

    (@signyourbikeout)

    Hello,

    Thank you for your time.

    I actually didn’t realize that we were now (https://core.trac.www.ads-software.com/ticket/13976) able to use the same menu twice on a page. Because of that fix, yes, a CSS only solution using display:none on the first tier is possible.

    Thanks for pointing me in that direction.

    Paul

Viewing 5 replies - 1 through 5 (of 5 total)
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