Dropdown
Properties
Size of the up-down arrow rendered by DropdownArrowEndAction (native box of COUI coui_pop_up_next_normal.xml, a 14x24dp vector).
Size of the trailing check icon shown on the selected option (COUI coui_popup_list_window_checkbox_width).
Padding between the title/summary block and the trailing check icon (COUI popup_list_window_item_title_end_gap, an 8dp Space in coui_popup_list_window_item.xml).
Size of the trailing chevron shown on rows that own a submenu (native box of COUI coui_btn_next_normal.xml, a 12x24dp vector).
Horizontal padding of each row in dialog mode.
Top/bottom padding applied to the first/last row in popup mode: COUI coui_popup_list_window_item_padding_top_and_bottom (8dp) plus the list inset coui_popup_list_padding_vertical (2dp) that COUI DefaultAdapter folds into the edge rows.
Group header line limit (COUI coui_popup_list_window_header_item.xml maxLines).
Padding between the trailing hint slot and the selection indicator (COUI popup_list_window_item_hint_end_gap, a 4dp Space in coui_popup_list_window_item.xml).
Maximum width of the trailing hint slot (COUI popup_list_window_item_hint_layout couiMaxWidth in coui_popup_list_window_item.xml).
Padding between the leading icon cell and the title text (COUI coui_popup_list_window_item_icon_margin_right).
Minimum size of the leading icon cell (COUI coui_popup_list_window_item.xml icon, a 24dp ImageView).
Horizontal padding of each row in popup mode (COUI coui_popup_list_window_item_icon_margin_left, used as both paddingStart and paddingEnd in coui_popup_list_window_item.xml).
Maximum width of the inner text/icon row when the dropdown is shown in popup mode (COUI coui_popup_list_window_item_max_width; applied as maxWidth on the title/description text views in coui_popup_list_window_item.xml).
Top/bottom padding applied to middle rows in popup mode and to all rows in dialog mode (COUI coui_popup_list_window_item_padding_top_and_bottom).
Color of the 4dp group divider band between dropdown groups in popup mode (COUI coui_popup_list_group_divider_color #14000000). The resource has no values-night override, so COUI renders the same translucent black band in both light and dark themes.
Thickness of the group divider band (COUI coui_popup_list_group_divider_height).
Minimum height of a DropdownHeaderItem group header row, vertical padding included (COUI coui_popup_list_window_header_item_min_height).
Minimum height of each option row in popup mode, vertical padding included (COUI coui_popup_list_window_item_min_height). Matching COUI DefaultAdapter.configItemVerticalPadding, the first/last rows additionally grow by the folded-in list inset (coui_popup_list_padding_vertical), i.e. by FirstLastVerticalPadding - MiddleVerticalPadding per affected edge.
Summary line limit (COUI DefaultAdapter.setDescription).
Title line limit on a row without a summary (COUI DefaultAdapter.setTitle).
Title line limit on a row that also shows a summary (COUI DefaultAdapter.setTitle).
Functions
Default popup row colors, matching COUI coui_popup_list_window_item_tint_selector (default couiColorLabelPrimary, selected couiColorLabelTheme, disabled couiColorLabelTertiary). Summaries always use couiColorLabelSecondary, and row containers stay transparent — the popup surface provides the fill.