[wp-hackers] Adding new Menu Modules to Wordpress

[Dobri]

Hi,

Just speaking from experience, I tried to do something like that a couple of months ago and reached pretty much nowhere using multiple approaches. Menu items seem to be semi-hardcoded. What I ended up doing in the end is I used custom links and used their title/link/alt fields as parameters that are parsed by a custom walker. Here's some code if you'd like to look into the idea:

//you need a custom walker class. you can override start_el and a bunch of other methods, look into the definition of Walker_Nav_Menu
        class Custom_Walker extends Walker_Nav_Menu
	{	
		function start_el(&$output, $item, $depth=0, $args=array())
		{  
			//If it's a subitem, ignore and revert to regular Walker
			if( 0 != $depth )
			{
				parent::start_el($output, $item, $depth, $args);
			}
			else
			{
				//If the title of the thing begins with the word Divider
				if(preg_match('/^Divider/',$item->title) == 1)
				{
					global $wp_query;
					//assure proper indentation
					$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
					
					//open the divider li
					$output .= $indent . '<li class="noLink">';
					
					//generate the inside code
					$item_output = $args->before;
					$item_output .= $args->link_before . apply_filters( 'the_title', $item->attr_title, $item->ID ) . $args->link_after;
					$item_output .= $args->after;
					
					//finish it up
					$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
				}
				else
				{
					parent::start_el($output, $item, $depth, $args);
				}
			}
		}
	}

and wherever you render the menu:

$walker = new Custom_Walker();
wp_nav_menu(array('theme_location' => 'rail_menu', …, 'walker' => $walker));

Not very extensible as you might imagine though. The code above adds a little divider element if the title of the custom link begins with Divider. I'd be happy to see someone else offer a better solution, I'd implement it myself right away.

~Dobri

On Wed, 29 Jan 2014, at 4:21 PM, BenderisGreat wrote:

> I have searched around, and have not been able to find the solution myself. 
> I would like to add a new module of items to the Appearance->Menus page in
> the backend. 
> 
> This is the page: 
> http://codex.wordpress.org/images/c/ca/appearance-menus.png
> <http://codex.wordpress.org/images/c/ca/appearance-menus.png>  
> 
> Where it says Pages, Links, Categories.  Is it possible to add an additional
> section there with unique menu items specific to a plugin.  The links I
> would like to add in a custom module are dynamic, created using rewrite
> rules.  
> 
> 
> 
> --
> View this message in context: http://wordpress-hackers.1065353.n5.nabble.com/Adding-new-Menu-Modules-to-Wordpress-tp43267.html
> Sent from the Wordpress Hackers mailing list archive at Nabble.com.
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