Widget.php

<?php
/**
 * Adds compatibility methods between WP_Widget and scbForms.
 */
abstract class scbWidget extends WP_Widget {

	/**
	 * Widget defaults.
	 * @var array
	 */
	protected $defaults = array();

	/**
	 * Widgets to register.
	 * @var array
	 */
	private static $scb_widgets = array();

	/**
	 * Initializes widget.
	 *
	 * @param string $class
	 * @param string $file (optional)
	 * @param string $base (optional)
	 *
	 * @return void
	 */
	public static function init( $class, $file = '', $base = '' ) {
		self::$scb_widgets[] = $class;

		add_action( 'widgets_init', array( __CLASS__, '_scb_register' ) );

		// for auto-uninstall
		if ( $file && $base && class_exists( 'scbOptions' ) ) {
			new scbOptions( "widget_$base", $file );
		}
	}

	/**
	 * Registers widgets.
	 *
	 * @return void
	 */
	public static function _scb_register() {
		foreach ( self::$scb_widgets as $widget ) {
			register_widget( $widget );
		}
	}

	/**
	 * Displays widget content.
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The settings for the particular instance of the widget.
	 *
	 * @return void
	 */
	public function widget( $args, $instance ) {
		$instance = wp_parse_args( $instance, $this->defaults );

		extract( $args );

		echo $before_widget;

		$title = apply_filters( 'widget_title', isset( $instance['title'] ) ? $instance['title'] : '', $instance, $this->id_base );

		if ( ! empty( $title ) ) {
			echo $before_title . $title . $after_title;
		}

		$this->content( $instance );

		echo $after_widget;
	}

	/**
	 * This is where the actual widget content goes.
	 *
	 * @param array $instance The settings for the particular instance of the widget.
	 *
	 * @return void
	 */
	protected function content( $instance ) { }


//_____HELPER METHODS_____


	/**
	 * Generates a input form field.
	 *
	 * @param array $args
	 * @param array $formdata (optional)
	 *
	 * @return string
	 */
	protected function input( $args, $formdata = array() ) {
		$prefix = array( 'widget-' . $this->id_base, $this->number );

		$form = new scbForm( $formdata, $prefix );

		// Add default class
		if ( ! isset( $args['extra'] ) && 'text' == $args['type'] ) {
			$args['extra'] = array( 'class' => 'widefat' );
		}

		// Add default label position
		if ( ! in_array( $args['type'], array( 'checkbox', 'radio' ) ) && empty( $args['desc_pos'] ) ) {
			$args['desc_pos'] = 'before';
		}

		$name = $args['name'];

		if ( ! is_array( $name ) && '[]' == substr( $name, -2 ) ) {
			$name = array( substr( $name, 0, -2 ), '' );
		}

		$args['name'] = $name;

		return $form->input( $args );
	}

}