/*******************************************
* admin-page.php
*******************************************/

function test_settings_menu() {

    global $my_test_page;

    // add settings page
    add_menu_page( __( 'My Options Page', 'test' ), __( 'My Options Page', 'test' ), 'manage_options', 'test-page', 'test_my_page';
    $my_test_page = add_submenu_page( 'test-page', __( 'ASDF', 'test' ), __( 'ASDF', 'test' ), 'manage_options', 'test-page', 'test_my_page' );

    add_action("load-$test_my_page", "test_screen_options");
}
add_action('admin_menu', 'test_settings_menu');


/*******************************************
* list-page.php
*******************************************/

function test_my_page()
{
    global $test_options, $wpdb;
    $current_page = get_bloginfo('wpurl') . '/wp-admin/admin.php?page=test-page';
    ?>
    <div class="wrap">


            <h2><?php _e('Main Page', 'test'); ?></h2>
            <?php

            // pagination variables
            if (isset($_GET['p'])) $page = $_GET['p']; else $page = 1;

            $user = get_current_user_id();

            $screen = get_current_screen();

            $screen_option = $screen->get_option('per_page', 'option');

            $per_page = get_user_meta($user, $screen_option, true);

            if ( empty ( $per_page) || $per_page < 1 ) {
                $per_page = $screen->get_option( 'per_page', 'default' );
            }

            $total_pages = 1;

            $offset = $per_page * ($page-1);

            $total_pages = ceil($current_count/$per_page);

            ?>

            <p>Content will eventually go here.</p>


    </div><!--end wrap-->

    <?php
}


/*******************************************
* Screen-options.php
*******************************************/

function test_screen_options() {

    global $my_test_page;

    $screen = get_current_screen();

    if(!is_object($screen))
        return;
    switch($screen->id) :
        case $my_test_page :
            $args = array(
                'label' => __('Items per page', 'mus'),
                'default' => 10,
                'option' => 'test_items_per_page'
            );
            add_screen_option( 'per_page', $args );
            break
    endswitch;
}

function test_set_screen_option($status, $option, $value) {
    if ( 'test_items_per_page' == $option ) return $value;
}
add_filter('set-screen-option', 'test_set_screen_option', 10, 3);