WP Tidy Settings test plugin

class-settings-test.php

<?php
namespace TDS;

if ( ! defined( 'ABSPATH' ) ) exit;

class Settings_Test extends Settings_Page {

  public function __construct() {

    $this->id            = 'test';
    $this->label         = 'Test page';
    $this->plugin_prefix = 'test';
    $this->init();

  }

  public function init() {

    add_filter( $this->plugin_prefix . '_settings_tabs_array', array( $this, 'add_settings_page' ), 20 );
    add_action( $this->plugin_prefix . '_settings_sections_' . $this->id, array( $this, 'output_sections' ) );
    add_action( $this->plugin_prefix . '_settings_' . $this->id, array( $this, 'output' ) );
    add_action( $this->plugin_prefix . '_settings_save_' . $this->id, array( $this, 'save' ) );

  }

  public function get_sections() {
		$sections = array(
			''         => __( 'Section 1' ),
			'test'     => __( 'Section 2' ),
		);
		return $sections;
	}

  public function get_settings() {

    $section = $this->get_current_section();

    if( $section == 'test' ) {

      $settings = array(

        array(
          'label' => 'Text Field',
          'name' => 'test_field_new',
          'desc' => 'this is the description of this field',
          'type'  => 'text',
        ),

      );

    } else {

      $settings = array(

        array(
          'label' => 'General Options',
          'type'  => 'title',
        ),

        array(
          'label' => 'Text Field',
          'name' => 'test_field',
          'desc' => 'this is the description of this field',
          'type'  => 'text',
        ),

        array(
          'label' => 'Text Field',
          'name' => 'test_field_select2',
          'desc' => 'this is the description of this field',
          'type'  => 'select',
          'options' => array( 'test' => 't', 'test2' => 't2' )
        ),

        array(
          'label' => 'Text Field',
          'name' => 'test_field_radio2',
          'desc' => 'this is the description of this field',
          'type'  => 'radio',
          'options' => array( 'test' => 't', 'test2' => 't2' )
        ),

        array(
          'label' => 'Textarea Field',
          'name' => 'test_field2',
          'desc' => 'this is the description of this field',
          'type'  => 'textarea',
          'attributes' => array( 'rows' => 10, 'cols' => 50 )
        ),

        array(
          'label' => 'Text Field',
          'name' => 'test_field33',
          'desc' => 'this is the description of this field',
          'type'  => 'number',
        ),

        array(
          'label' => 'Text Field',
          'name' => 'test_field_check',
          'desc' => 'this is the description of this field',
          'type'  => 'checkbox',
        ),

      );

    }

    return $settings;

  }

  public function save() {

    $settings = $this->get_settings();

    call_user_func( array( __NAMESPACE__ .'\\Settings_Manager', 'save_fields' ), $settings );

  }

}

return new Settings_Test();

example.php

<?php

require_once( plugin_dir_path( __FILE__ ) .'wp-tidy-settings.php' );

class WP_Tidy_Settings_Test {

  public $settings_api;

  function __construct() {

    $this->settings_api = new TDS\Settings_Manager( array(
      'option_name'    => 'tds_test',
      'plugin_prefix'  => 'test',
      'plugin_version' => '1.0.0',
      'first_page_id'  => 'test',
      'panel_title'    => 'Options Panel Test'
    ) );

    $this->settings_api->set_panel_url( 'options-general.php?page=settings_api_test' );
    $this->settings_api->add_settings_pages( $this->get_settings_pages() );

    add_action( 'admin_menu', array($this, 'admin_menu') );

    add_action( 'admin_enqueue_scripts', array( $this, 'styles') );

  }

  function admin_menu() {
    add_options_page( 'Settings API', 'Settings API', 'manage_options', 'settings_api_test', array( $this, 'plugin_page' ) );
  }

  function get_settings_pages() {

    $pages = array();

    $pages[] = include( 'class-settings-test.php' );

    return $pages;

  }

  function styles() {
    $this->settings_api->enqueue_styles();
  }

  function plugin_page() {
    $this->settings_api->output();
  }

}

new WP_Tidy_Settings_Test();