OOP Style Widgets for Wordpress

Widget_Setup.php

class Widget_Setup
{
    public $widget_class  = '';
    public $admin_styles  = array();
    public $admin_scripts = array();
    public $front_styles  = array();
    public $front_scripts = array();

    public $script_defaults = array(
        'handle'    => '',
        'src'       => '',
        'deps'      => array(),
        'version'   => false,
        'in_footer' => false
    );

    public $style_defaults = array(
        'handle'   => '',
        'src'      => '',
        'deps'     => array(),
        'version'  => false,
        'media'    => 'all'
    );

    public function __construct( $widget_class = '', $admin_styles = array(), $admin_scripts = array(), $front_styles = array(), $front_scripts = array() ) {

        $this->widget_class  = $widget_class;
        $this->admin_styles  = $admin_styles;
        $this->admin_scripts = $admin_scripts;
        $this->front_styles  = $front_styles;
        $this->front_scripts = $front_scripts;

        add_action( 'admin_print_styles',    array( $this, 'add_styles' ) );
        add_action( 'admin_enqueue_scripts', array( $this, 'add_scripts' ) );
        add_action( 'wp_enqueue_scripts',    array( $this, 'add_styles' ) );
        add_action( 'wp_enqueue_scripts',    array( $this, 'add_scripts' ) );

        if( ! empty( $this->widget_class ) )
            add_action( 'widgets_init', array( $this, 'register_widget' ) );

    }

    public function register_widget() {

        register_widget( $this->widget_class );

        return true;

    }

    public function add_styles() {

        $styles = ( is_admin() ) ?
            $this->admin_styles : $this->front_styles;

        if( empty( $styles ) )
            return false;

        foreach( $styles as $style ) {

            $style = wp_parse_args( $style, $this->style_defaults );

            wp_enqueue_style(
                $style['handle'],
                $style['src'],
                $style['deps'],
                $style['version'],
                $style['media']
            );

        }

        return true;
    }

    public function add_scripts() {

        $scripts = ( is_admin() ) ?
            $this->admin_scripts : $this->front_scripts;

        if( empty( $scripts ) )
            return false;

        foreach( $scripts as $script ) {

            $script = wp_parse_args( $script, $this->script_defaults );

            wp_enqueue_script(
                $script['handle'],
                $script['src'],
                $script['deps'],
                $script['version'],
                $script['media']
            );

        }

        return true;
    }

}

your-widget.php

class MyAwesomeWidget extends WP_Widget {

    const TEXTDOMAIN = 'widget_textdomain';

    public function __construct() {

        parent::__construct(

            'widget-name-id',
            __( 'Widget Name', self::TEXTDOMAIN ),
            array(
                'classname'   =>    __CLASS__,
                'description' =>    __( 'Short description.', self::TEXTDOMAIN )
            )
        );

        $admin_style = array(
            array( 'handle' => 'somehandle', 'src' => 'path/to/source' ),
            array( 'handle' => 'someotherhandle', 'src' => 'path/to/source' ),
        );

        $admin_scripts = array(
            array( 'handle' => 'scrpthandle', 'src' => 'path/to/source', 'deps' => array( 'jquery') ),
        );

        $front_styles = array(
            array( 'handle' => 'frontstyle', 'src' => 'path/to/src' ),
        );

        new Widget_Setup( __CLASS__, $admin_style, $admin_scripts, $front_styles );
    }

    public function widget( $instance, $args ) {}

    public function update( $new_instance, $old_instance ) {}

    public function form( $instance ) {}

}

Great work—this script is incredibly useful for converting raster to vector polygons with GDAL. It’s interesting how similar geospatial processing and data validation workflows are to systems we use in other fields. For example, in digital ID card status checking, we also rely on precise boundary logic and attribute extraction—just like polygonizing raster data, but applied to structured personal data. Whether it's spatial boundaries or identity verification, clarity and accuracy in data handling are critical.