Post navigation – background images

  • Resolved Argumentum

    (@argumentum0)


    10 years, 3 months ago

    Hi,

    I am having a little issue with the background images of the post navigation links.

    I use a Gazette child theme. In my child theme, I modified the file single.php in order to restrict the previous/next post links to posts within the same category only. To do that, I added 'in_same_term' => true, in the_post_navigation( array( ) );.

    It does work … but only for the links themselves. With 'in_same_term' => true, the navigation “banners” do show the links (and its respective titles) to the previous/next posts of the same category, but with wrong background images. The background images shown are not from the actual linked posts, but from the previous/next posts of the whole blog (irrespective of its category).

    Apparently the background image is set by the function gazette_post_nav_background in the file \inc\template-tags.php, but I have no idea what I have to do to make it work like the_post_navigation with 'in_same_term' => true,.

    Two questions, then:

    1. What modifications do I have to do to get the right background images (when using 'in_same_term' => true,)?

    2. In case I need to edit the file \inc\template-tags.php, would it be possible to do so in a child theme? Or will I have to edit the file in the parent theme and be careful with theme updates? (If it is impossible to edit such file in a child theme, simply adding something to the file functions.php would certainly be preferable?)

    Thanks in advance!

Viewing 5 replies - 1 through 5 (of 5 total)
  • Thread Starter Argumentum

    (@argumentum0)

    10 years, 3 months ago

    I’ve successfully edited the file \inc\template-tags.php to show the right background images in the post navigation — just had to change the first parameter of get_adjacent_post from false to true.

    Now I just need to know how I can use this in a child theme, since the file is in a subfolder. I have tried to simply copy the original directory hierarchy, but the file was not loaded. I suppose only the files in the root folder of the theme are automatically overrode by its respective child versions, then.

    I see \inc\template-tags.php is loaded in the parent functions.php with require get_template_directory() . '/inc/template-tags.php';, but I have no idea how to override this require in a child theme.

    Any help will be appreciated. Thanks again!

    Moderator Kathryn Presner

    (@zoonini)

    10 years, 3 months ago

    gazette_post_nav_background() is not a “pluggable” function (it’s not wrapped in a conditional) so it’s not possible to override it simply in a child theme.

    The technique you’d use is to unhook the function from the parent and then add your new function in a child theme, so there are no conflicts.

    Moderator Kathryn Presner

    (@zoonini)

    10 years, 3 months ago

    If you’re not familiar with this, here’s a tutorial that may help:

    http://code.tutsplus.com/tutorials/a-guide-to-overriding-parent-theme-functions-in-your-child-theme–cms-22623 – see the section “Removing Functions From Hooks.”

    Thread Starter Argumentum

    (@argumentum0)

    10 years, 3 months ago

    Great, I did what you suggested, and it worked!

    I was first looking for a way to override the require statement in the parent functions.php, but I couldn’t find a way to do it. That’s exactly what this guy wanted: http://stackoverflow.com/questions/32554393/how-to-override-a-parent-file-in-a-child-wordpress-theme-when-parent-file-is-bei.

    But simply unhooking the original function and including the new version with a different name worked. Thanks again!

    Moderator Kathryn Presner

    (@zoonini)

    10 years, 3 months ago

    Glad that did the trick!

Viewing 5 replies - 1 through 5 (of 5 total)

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