Thanks for your updated source text and your new questions.
You asked “Is it possible that instead of a permanent title, the name of the selected category would appear?” There is no way to do this with the current MLA version if you use the Photonic Gallery plugin to format the gallery display. However, I am working on a solution that should allow this and I will post an update here when I have progress to report.
You wrote “I tried to make the page so that it loads a certain category by default. You can do that by adding current_attachment_category="bw-reference-images" to your [mla_term_list] shortcode and changing the default term slug in your two [mla_gallery] shortcodes. I assume that bw-reference-images is the appropriate slug for your default term. Your shortcodes should look like:
<form id="mla-text-form" action="https://l.mladev/anton-test/" method="post" class="row">
<strong>Att. Categories</strong>
[mla_term_list]
taxonomy=attachment_category
mla_item_parameter=current_attachment_category
current_attachment_category="bw-reference-images"
mla_output=dropdown
mla_option_value="{+slug+}"
option_all_text='Выбрать категорию для просмотра' option_all_value=all
show_count=true pad_counts=false
hierarchical=true
[/mla_term_list]
<input id="text-form-submit" name="text_form_submit" type="submit" value="Показать фотографии" />
</form>
<h3>Gallery</h3>
[mla_gallery] style="random"
attachment_category="{+template:({+request:attachment_category+}|{+request:tax_input.attachment_category+}|bw-reference-images)+}"
posts_per_page=12 mla_caption="{+title+} : {+description+}"
mla_nolink_text="<br> <br>"
orderby="ID DESC"
[/mla_gallery]
[mla_gallery]
attachment_category="{+template:({+request:attachment_category+}|{+request:tax_input.attachment_category+}|bw-reference-images)+}"
posts_per_page=12 mla_output="paginate_links,prev_next"
mla_link_href='{+new_url+}?attachment_category="{+template:({+request:attachment_category+}|{+request:tax_input.attachment_category+}|bw-reference-images)+}"'
[/mla_gallery]
This works on my test system. The only shortcoming is that the dropdown box will always display the default value, even if you are paging through a gallery for some other value.
To fix that you can install and activate one of the MLA example plugins, which (among other things) makes the dropdown control value “sticky”.
To install the example plugin, navigate to the Settings/Media library Assistant Documentation tab and click the “Example Plugins” button. You will see a table that lists all the example plugins and gives you a “one-click” action for installing them. Type “ui” in the text box and click “Search Plugins” to filter the table. You are looking for the “MLA UI Elements Example” plugin. Find that plugin and hover over the title in the left-most column. Click the “Install” rollover action, then go to the WordPress Plugins/Installed Plugins submenu and activate it as you would any other plugin.
Once the plugin is active, go back to your source text and:
- Add
use_filters=true to your [mla_term_list] shortcode.
- Add
add_filters_to=any to your first [mla_gallery] shortcode (the one that formats the gallery display).
Those parameters will coordinate the current term between the dropdown control and the gallery display.
I hope that solves your default category needs. I will let you know if I can add the dynamic heading to your application.
