Attaching media to post type without editor support - wordpress

Question

I'm trying to add attachments to a custom post type that hasn't editor support (only excerpt).
I've managed to show the Media Manager dialog box, but I can only see the "Insert into post" button (that does nothing anyway) and when uploading images, they don't get attached to the post.
To implement what I did so far, I've added a very simple meta box to the post type:
function add_gallery_post_media_meta_box()
{
add_meta_box(
'gallery_post_media',
'Gallery Media',
'gallery_post_media',
'gallery',
'side',
'high'
);
} // add_file_meta_box
add_action('add_meta_boxes', 'add_gallery_post_media_meta_box');
function gallery_post_media()
{
echo '' . __('Add media') .'';
} // end post_media
function register_admin_scripts() {
wp_enqueue_media();
wp_register_script( 'gallery_post_media_admin_script', get_template_directory_uri() . '/library/cpt/gallery.js' );
wp_enqueue_script( 'gallery_post_media_admin_script' );
} // end register_scripts
add_action( 'admin_enqueue_scripts', 'register_admin_scripts' );
And the script:
jQuery(document).ready(function ($) {
$('#gallery-add-media').click(function (e) {
var send_attachment_bkp = wp.media.editor.send.attachment;
var button = $(this);
var id = button.attr('id').replace('_button', '');
wp.media.editor.send.attachment = function (props, attachment) {
$("#" + id).val(attachment.url);
wp.media.editor.send.attachment = send_attachment_bkp;
}
wp.media.editor.open(button);
event.preventDefault();
return false;
});
});
If I would able to find some documentation about wp.media.editor.send.attachment, I'd probably manage to get what I want, but I can't find anything useful.
The only solutions I've found all relies on custom fields, instead I want to simply attach these images to the post, without inserting them in the post content, as I would do with normal posts.
As a side question: is it possible to tell the Media Manager to only accept images?

Answer 1

This is the JavaScript I use for media fields. Once you hit insert you can do whatever you want with the data from the image's selected
jQuery(document).ready(function() {
//uploading files variable
var custom_file_frame;
jQuery(document).on('click', '.meida-manager', function(event) {
event.preventDefault();
$this = jQuery(this);
//If the frame already exists, reopen it
if (typeof(custom_file_frame)!=="undefined") {
custom_file_frame.close();
}
//Create WP media frame.
custom_file_frame = wp.media.frames.customHeader = wp.media({
//Title of media manager frame
title: "Sample title of WP Media Uploader Frame",
library: {
type: 'image'
},
button: {
//Button text
text: "insert text"
},
//Do not allow multiple files, if you want multiple, set true
multiple: false
});
//callback for selected image
custom_file_frame.on('select', function() {
var attachment = custom_file_frame.state().get('selection').first().toJSON();
//do something with attachment variable, for example attachment.filename
//Object:
//attachment.alt - image alt
//attachment.author - author id
//attachment.caption
//attachment.dateFormatted - date of image uploaded
//attachment.description
//attachment.editLink - edit link of media
//attachment.filename
//attachment.height
//attachment.icon - don't know WTF?))
//attachment.id - id of attachment
//attachment.link - public link of attachment, for example ""http://site.com/?attachment_id=115""
//attachment.menuOrder
//attachment.mime - mime type, for example image/jpeg"
//attachment.name - name of attachment file, for example "my-image"
//attachment.status - usual is "inherit"
//attachment.subtype - "jpeg" if is "jpg"
//attachment.title
//attachment.type - "image"
//attachment.uploadedTo
//attachment.url - http url of image, for example "http://site.com/wp-content/uploads/2012/12/my-image.jpg"
//attachment.width
$this.val(attachment.url);
$this.siblings('img').attr('src',attachment.url);
});
//Open modal
custom_file_frame.open();
});
});