Setting default header image in child theme

Double the chance of resolving the problem by creating your own thread.

add this in your child theme’s function.php

remove_action( 'after_setup_theme', 'twentytwelve_custom_header_setup' );

go to here
http://core.trac.wordpress.org/browser/tags/3.5/wp-content/themes/twentytwelve/inc/custom-header.php

and copy from #L21 to #L47 (including line #21 and including line #47)

then in your child’s function.php paste the code into it right below that first line you just added.

then change the name of the function twentytwelve_custom_header_setup ( there are 2 instances ) to your own, like mytheme_custom_header_setup

then look inside that function you will notice the 'default-image' in $args is currently empty, just specify one you want.

Done.

It looks complicated but it’s not, and it could be easier if there were a filter hook to change the $args

Copy and paste this to your child theme’s function.php

/**
 * add this to TwentyTwelve's Child theme's function.php
 * to define default header image which TwentyTwelve doesn't have
 */

// remove default action from Twenty Twelve
remove_action( 'after_setup_theme', 'twentytwelve_custom_header_setup' );

// define new $args ,basically it's the same function copied over but with added default-image
function mytheme_custom_header_setup() {
	$args = array(
		// Text color and image (empty to use none).
		'default-text-color'     => '444',
		'default-image'          => get_stylesheet_directory_uri() . '/images/mythemeheader.jpg',

		// Set height and width, with a maximum value for the width.
		'height'                 => 250,
		'width'                  => 960,
		'max-width'              => 2000,

		// Support flexible height and width.
		'flex-height'            => true,
		'flex-width'             => true,

		// Random image rotation off by default.
		'random-default'         => false,

		// Callbacks for styling the header and the admin preview.
		'wp-head-callback'       => 'twentytwelve_header_style',
		'admin-head-callback'    => 'twentytwelve_admin_header_style',
		'admin-preview-callback' => 'twentytwelve_admin_header_image',
	);

	add_theme_support( 'custom-header', $args );
}

// add it the same way Twenty Twelve does
add_action( 'after_setup_theme', 'mytheme_custom_header_setup' );

This code is tested, it works.

If not, under Appearance > Header click ‘Restore Original Header Image’

and also, make sure in your child theme there is a folder images with mythemeheader.jpg in it, or whatever you name it just make sure it matches the file name in the code.

make sure in your child theme there is a folder images with mythemeheader.jpg

That can also be .png, correct?

We do have some more to do here, but you are “da man”, paulwp!

http://www.nonameyet.org/

Many thanks!

What I hope to eventually do there is to use that as a background and to place my other items already there and a smaller header image over it.

How are you coming along there, fernandopolania?

To anyone interested: I have made a plugin that does what paulwp has shared here and I will gladly pass it along to anyone who needs it.

@paulwp: As I had mentioned, I have made a plugin of the code you have posted here, and I did that because (and as a rookie) I had read something somewhere about a plugin occasionally being preferable over an accumulation of things in functions.php. Either way, however, someone had suggested I submit the new plugin to the repository…and it has been accepted. But since I would/will be showing your username as the contributor of its code, I have come here again to first ask your permission for that mention of you.

Many thanks.

edit: Also, a link to this thread will be the one (and only) listed or shown anywhere in relation to the new plugin.