This article is about the default admin_page, admin_block and admin_block_content templates which serves as the base of the content display on some system configuration pages such as the one on this image:
The code
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<?php namespace Drupal\your_module\Controller; use Drupal; use Drupal\Core\Controller\ControllerBase; use Drupal\Core\Url; class YourModuleController extends ControllerBase { protected $database; function content() { // Render array to return $mainRenderArray = []; // admin_page style (half width) $mainRenderArray[] = [ ‘#theme’ => ‘admin_page’, ‘#blocks’ => [ // Array of admin_block [ ‘title’ => $this->t(‘A block, on the left’), ‘position’ => ‘left’, ‘content’ => [ ‘#theme’ => ‘admin_block_content’, ‘#content’ => [ [ ‘title’ => ‘Do something’, ‘url’ => Url::fromRoute(‘your_module.some.example.route’), ‘description’ => $this->t(‘This will link to a route.’) ], [ ‘title’ => ‘Navigate to a nice blog’, ‘url’ => Url::fromUri(‘https://blog.dakwamine.fr’), ‘description’ => $this->t(‘This will link to a URI, external in this case.’) ], [ ‘title’ => ‘Go to contents page’, ‘url’ => Url::fromUri(‘internal:/admin/content’), ‘description’ => $this->t(‘Also works for internal URI.’) ] ] ] ], [ ‘title’ => $this->t(‘Another block, on the right’), ‘position’ => ‘right’, ‘content’ => [ ‘#theme’ => ‘admin_block_content’, ‘#content’ => [ [ ‘title’ => ‘Another link to a route’, ‘url’ => Url::fromRoute(‘your_module.another.route’), ‘description’ => $this->t(‘Yup.’) ], [ ‘title’ => ‘Website example link’, ‘url’ => Url::fromUri(‘https://website.example’), ‘description’ => $this->t(‘Goes on website.example.’) ], ] ] ] ], ]; // admin_block style (full width) $mainRenderArray[] = [ ‘#theme’ => ‘admin_block’, ‘#block’ => [ ‘title’ => $this->t(‘Full width block’), ‘content’ => [ ‘#theme’ => ‘admin_block_content’, ‘#content’ => [ [ ‘title’ => ‘Another link’, ‘url’ => Url::fromUri(‘internal:/admin/people’), ‘description’ => $this->t(‘A link to the people page.’) ], [ ‘title’ => ‘Another link again’, ‘url’ => Url::fromUri(‘https://website.example’), ‘description’ => $this->t(‘Goes on website.example.’) ], ] ], ], ]; return $mainRenderArray; } } |
Explanation
If you use admin_page, you will be able to define the column in which the blocks dwell: left or right.
If you use directly admin_block, there is only a single block and it will span over the full width of the region.
So all in all, here is a pseudo hierarchy to better understand how it works:
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(render array base) │ ├── admin_page │ └── admin_block <== Half width │ └── admin_block_content │ └── admin_block <== Full width └── admin_block_content |
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