diff core/modules/settings_tray/settings_tray.api.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/settings_tray/settings_tray.api.php	Thu Jul 05 14:24:15 2018 +0000
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+<?php
+
+/**
+ * @file
+ * Documentation for Settings Tray API.
+ */
+
+/**
+ * @defgroup settings_tray Settings Tray API
+ * @{
+ * Settings Tray API
+ *
+ * @section sec_overview Overview and terminology
+ *
+ * The Settings Tray module allows blocks to be configured in a sidebar form
+ * without leaving the page. For example:
+ *
+ * - For every block, one can configure whether to display the block title or
+ *   not, and optionally override it (block configuration).
+ * - For menu blocks, one can configure which menu levels to display (block
+ *   configuration) but also the menu itself (menu configuration).
+ * - For the site branding block, one can change which branding elements to
+ *   display (block configuration), but also the site name and slogan (simple
+ *   configuration).
+ *
+ * Block visibility conditions are not included the sidebar form.
+ *
+ * @section sec_api The API: the form in the Settings Tray
+ *
+ * By default, the Settings Tray shows any block's built-in form in the
+ * off-canvas dialog.
+ *
+ * @see core/misc/dialog/off-canvas.es6.js
+ *
+ * However, many blocks would benefit from a tailored form which either:
+ * - limits the form items displayed in the Settings Tray to only items that
+ *   affect the content of the rendered block
+ * - adds additional form items to edit configuration that is rendered by the
+ *   block. See \Drupal\settings_tray\Form\SystemBrandingOffCanvasForm which
+ *   adds site name and slogan configuration.
+ *
+ * These can be used to provide a better experience, so that the Settings Tray
+ * only displays what the user will expect to change when editing the block.
+ *
+ * Each block plugin can specify which form to use in the Settings Tray dialog
+ * in its plugin annotation:
+ * @code
+ * forms = {
+ *   "settings_tray" = "\Drupal\some_module\Form\MyBlockOffCanvasForm",
+ * },
+ * @endcode
+ *
+ * In some cases, a block's content is not configurable (for example, the title,
+ * main content, and help blocks). Such blocks can opt out of providing a
+ * settings_tray form:
+ * @code
+ * forms = {
+ *   "settings_tray" = FALSE,
+ * },
+ * @endcode
+ *
+ * Finally, blocks that do not specify a settings_tray form using the annotation
+ * above will automatically have it set to their plugin class. For example, the
+ * "Powered by Drupal" block plugin
+ * (\Drupal\system\Plugin\Block\SystemPoweredByBlock) automatically gets this
+ * added to its annotation:
+ * @code
+ * forms = {
+ *   "settings_tray" = "\Drupal\system\Plugin\Block\SystemPoweredByBlock",
+ * },
+ * @endcode
+ *
+ * Therefore, the entire Settings Tray API is just this annotation: it controls
+ * what the Settings Tray does for a given block.
+ *
+ * @see settings_tray_block_alter()
+ * @see \Drupal\Tests\settings_tray\Functional\SettingsTrayBlockTest::testPossibleAnnotations()
+ *
+ * @}
+ */