Note: this list is generated by looking for the string for this theme hook, so it may include some references that are not actually using this theme hook.

backdrop_common_theme in includes/common.inc
Provides theme registration for themes across .inc files.
BackdropWebTestCase::handleForm in modules/simpletest/backdrop_web_test_case.php
Handle form input related to backdropPost(). Ensure that the specified fields exist and attempt to create POST data in the correct manner for the particular field type.
_book_add_form_elements in modules/book/book.module
Builds the common elements of the book form for the node and outline forms.
comment_form_node_type_form_alter in modules/comment/comment.module
Implements hook_form_FORM_ID_alter().
DatabaseTasks::getFormOptions in includes/install.inc
Return driver specific configuration options.
email_field_widget_settings_form in modules/email/email.module
Implements hook_field_widget_settings_form().
EntityLayoutContext::form in modules/layout/plugins/context/entity_layout_context_handler.inc
Settings form for configuring this context item.
FieldCrudTestCase::setUp in modules/field/tests/field.test
Sets up a Backdrop site for running functional and integration tests.
field_ui_field_edit_form in modules/field_ui/field_ui.admin.inc
Form constructor for the field instance settings form.
field_ui_field_edit_form_submit in modules/field_ui/field_ui.admin.inc
Form submission handler for field_ui_field_edit_form().
field_ui_field_edit_form_validate in modules/field_ui/field_ui.admin.inc
Form validation handler for field_ui_field_edit_form().
FieldUIManageFieldsTestCase::testCardinalitySettings in modules/field_ui/tests/field_ui.test
Tests the cardinality settings of a field.
filter_editor_image_upload_settings_form in modules/filter/filter.admin.inc
Subform constructor to configure the text editor's image upload settings.
filter_format_editor_image_form in modules/filter/filter.pages.inc
Form callback: Display a form for inserting/editing an image.
_filter_url_settings in modules/filter/filter.module
Implements callback_filter_settings().
FormElementTestCase::testPlaceHolderText in modules/simpletest/tests/form.test
Tests placeholder text for elements that support placeholders.
form_process_weight in includes/form.inc
Expands a weight element into a select element.
_form_test_disabled_elements in modules/simpletest/tests/form_test.module
Build a form to test disabled elements.
form_test_number in modules/simpletest/tests/form_test.module
Builds a form to test #type 'number' and 'range' validation.
form_test_placeholder_test in modules/simpletest/tests/form_test.module
Builds a form to test the placeholder attribute.
hook_field_formatter_settings_form in modules/field_ui/field_ui.api.php
Specify the form elements for a formatter's settings.
hook_field_settings_form in modules/field_ui/field_ui.api.php
Add settings to a field settings form.
hook_field_widget_settings_form in modules/field_ui/field_ui.api.php
Add settings to a widget settings form.
image_field_instance_settings_form in modules/image/image.field.inc
Implements hook_field_instance_settings_form().
image_gd_settings in modules/system/image.gd.inc
Retrieve settings for the GD2 toolkit.
image_resize_form in modules/image/image.admin.inc
Form structure for the image resize form.
image_rotate_form in modules/image/image.admin.inc
Form structure for the image rotate form.
layout_menu_item_form in modules/layout/layout.admin.inc
Form callback; Configure a layout menu item.
number_field_info in modules/field/modules/number/number.module
Implements hook_field_info().
NumberFieldTestCase::testNumberDecimalField in modules/field/modules/number/tests/number.test
Test number_decimal field.
NumberFieldTestCase::testNumberDecimalFieldStepValidation in modules/field/modules/number/tests/number.test
Test number_decimal field step validation.
NumberFieldTestCase::testNumberFieldEmpty in modules/field/modules/number/tests/number.test
Test empty value submission.
NumberFieldTestCase::testNumberFloatField in modules/field/modules/number/tests/number.test
Test number_float field.
NumberFieldTestCase::testNumberIntegerField in modules/field/modules/number/tests/number.test
Test number_integer field.
number_field_widget_form in modules/field/modules/number/number.module
Implements hook_field_widget_form().
number_field_widget_info in modules/field/modules/number/number.module
Implements hook_field_widget_info().
path_patterns_settings_form in modules/path/path.admin.inc
Form builder; Configure the URL alias pattern settings.
search_admin_settings in modules/search/search.admin.inc
Menu callback: displays the search module settings page.
system_element_info in modules/system/system.module
Implements hook_element_info().
taxonomy_form_term in modules/taxonomy/taxonomy.admin.inc
Form function for the term edit form.
text_field_formatter_settings_form in modules/field/modules/text/text.module
Implements hook_field_formatter_settings_form().
text_field_settings_form in modules/field/modules/text/text.module
Implements hook_field_settings_form().
text_field_widget_settings_form in modules/field/modules/text/text.module
Implements hook_field_widget_settings_form().
update_batch in includes/update.inc
Starts the database update batch process.
update_build_dependency_graph in includes/update.inc
Constructs a graph which encodes the dependencies between module updates.
update_resolve_dependencies in includes/update.inc
Resolves dependencies in a set of module updates, and orders them correctly.
update_script_selection_form in ./update.php
Form constructor for the list of available database module updates.
user_admin_settings in modules/user/user.admin.inc
Form builder; Configure user settings for this site.
ViewsBlock::form in modules/views/includes/views.block.inc
Build the settings form for editing this block.
views_plugin_display_page::options_form in modules/views/plugins/views_plugin_display_page.inc
Provide the default form for setting options.
views_plugin_pager_full::options_form in modules/views/plugins/views_plugin_pager_full.inc
Provide the default form for setting options.
views_plugin_pager_none::options_form in modules/views/plugins/views_plugin_pager_none.inc
Provide the default form for setting options.
views_plugin_pager_some::options_form in modules/views/plugins/views_plugin_pager_some.inc
Provide the default form for setting options.
views_plugin_style_grid::options_form in modules/views/plugins/views_plugin_style_grid.inc
Render the given style.
ViewsUiBaseViewsWizard::build_form in modules/views_ui/wizards/views_ui_base_views_wizard.php
For AJAX callbacks to build other elements in the "show" form.