wp-customize-image-reloaded.php

<?php 
	/**
	* Customize Image Reloaded Class
	*
	* Extend WP_Customize_Image_Control allowing access to uploads made within
	* the same context
	* 
	*/
	class My_Customize_Image_Reloaded_Control extends WP_Customize_Image_Control {
		/**
		* Constructor.
		*
		* @since 3.4.0
		* @uses WP_Customize_Image_Control::__construct()
		*
		* @param WP_Customize_Manager $manager
		*/
		public function __construct( $manager, $id, $args = array() ) {
		
		parent::__construct( $manager, $id, $args );
		       
		}
		
		/**
		* Search for images within the defined context
		* If there's no context, it'll bring all images from the library
		* 
		*/
		public function tab_uploaded() {
		$my_context_uploads = get_posts( array(
		    'post_type'  => 'attachment',
		    'meta_key'   => '_wp_attachment_context',
		    'meta_value' => $this->context,
		    'orderby'    => 'post_date',
		    'nopaging'   => true,
		) );
		
		?>
		
		<div class="uploaded-target"></div>
		
		<?php
		if ( empty( $my_context_uploads ) )
		    return;
		
		foreach ( (array) $my_context_uploads as $my_context_upload )
		    $this->print_tab_image( esc_url_raw( $my_context_upload->guid ) );
		}
		
	}
?>