Plugin admin list pages as submenu

Question

I am creating a plugin for a custom admin menu based in the admin area.

My wordpress template is consisted of 5 pages with different templates and some custom variables that the end user would be allowed to edit with a custom role I have assigned to him, eg. grunt. The reason I am doing this is so that the user could have the minimum knowledge of interacting with the page admin. For example, I have a page with 6 custom fields that define how the template should be shown, while in another page these field variables change to alter the display effect.

So in my admin menu I would have:

Site Management
- Page 1 Admin -> This makes a carousel with 2 items max
- Page 2 Admin -> This is a plain text page
- Page 3 Admin
- Page 4 Admin -> This is a carousel with 4 items max
- Page 5 Admin

And so on.

Since my menu is the same as the pages shown + Homepage link, I have used wp_get_nav_menu_items() function to get those menus. But now I am in a dilemma, trying to access every page's post to edit.

Here is how I list the pages on my admin menu:

$options = get_nav_menu_locations();
$menu_items = wp_get_nav_menu_items($options['main_nav']);
$i = 0;
foreach ((array) $menu_items as $key => $v):
    $post = get_post($v->object_id);
    setup_postdata($post);
    add_submenu_page('theme_admin2', 'Administration', $v->title, 'edit_posts', 'theme_admin_'.$v->object_id, array(&$this, 'display_page_test'));
endforeach;

Each menu item is a submenu page at the moment. How can I pass the $v->object_id variable to the display_page_test function of my plugin class so that I would differentiate my output as well?

UPDATE
I am referring to creating an admin menu using the public menu items as subitems (to the admin). Once a user clicks the subitem it will be an edit screen for the page: title, body and image. This is the only view that the customer will see + profile. I've created that page, but I cannot send the object id of each menu to the callback function that creates the submenu pages.

Answer 1

You do not post how you add the top level menu page, however I think when you click on a submenu item you have an url like:

http://www.example.com/wp-admin/admin.php?page=theme_admin_{$pageid}

So the id of page is in the $_GET['page'] variable with a fixed string prepended to it.

So why don't use something like:

function display_page_test() {
  $id = (int)str_replace('theme_admin_', '', $_GET['page']);
  $page = get_post($id);
  $action = isset($_GET['action']) ? $_GET['action'] : '';
  // just for test
  switch ( $action ) {
      case 'edit' :
        echo 'Do you want to edit ' . $page->post_title. '?';
        return;
      case 'delete' :
        echo 'Do you want to remove' . $page->post_title . '?';
        return;
      default :
        echo 'Ok, now we only show ' . $page->post_title;
        echo '<pre>';
        print_r($page);
        echo '</pre>';
        return;
   }
}

Edit

If you do not like the str_replace stuff, just use the clean post id in the variable:

add_submenu_page('theme_admin2', 'Administration', $v->title, 'edit_posts', 'theme_admin_' . $v->object_id.  '&post_id=' . $v->object_id, array(&$this, 'display_page_test'));

Then rely on $_GET['post_id']