android13/external/chromium-trace/catapult/third_party/polymer/components/paper-menu

Demo and API docs

##<paper-menu>

Material design: Menus

<paper-menu> implements an accessible menu control with Material Design styling. The focused item is highlighted, and the selected item has bolded text.

<paper-menu>
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-menu>

An initial selection can be specified with the selected attribute.

<paper-menu selected="0">
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-menu>

Make a multi-select menu with the multi attribute. Items in a multi-select menu can be deselected, and multiple items can be selected.

<paper-menu multi>
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-menu>

Styling

The following custom properties and mixins are available for styling:

Custom property	Description	Default
--paper-menu-background-color	Menu background color	--primary-background-color
--paper-menu-color	Menu foreground color	--primary-text-color
--paper-menu-disabled-color	Foreground color for a disabled item	--disabled-text-color
--paper-menu	Mixin applied to the menu	{}
--paper-menu-selected-item	Mixin applied to the selected item	{}
--paper-menu-focused-item	Mixin applied to the focused item	{}
--paper-menu-focused-item-after	Mixin applied to the ::after pseudo-element for the focused item	{}

Accessibility

<paper-menu> has role="menu" by default. A multi-select menu will also have aria-multiselectable set. It implements key bindings to navigate through the menu with the up and down arrow keys, esc to exit the menu, and enter to activate a menu item. Typing the first letter of a menu item will also focus it.

##<paper-submenu>

<paper-submenu> is a nested menu inside of a parent <paper-menu>. It consists of a trigger that expands or collapses another <paper-menu>:

<paper-menu>
  <paper-submenu>
    <paper-item class="menu-trigger">Topics</paper-item>
    <paper-menu class="menu-content">
      <paper-item>Topic 1</paper-item>
      <paper-item>Topic 2</paper-item>
      <paper-item>Topic 3</paper-item>
    </paper-menu>
  </paper-submenu>
  <paper-submenu>
    <paper-item class="menu-trigger">Faves</paper-item>
    <paper-menu class="menu-content">
      <paper-item>Fave 1</paper-item>
      <paper-item>Fave 2</paper-item>
    </paper-menu>
  </paper-submenu>
  <paper-submenu disabled>
    <paper-item class="menu-trigger">Unavailable</paper-item>
    <paper-menu class="menu-content">
      <paper-item>Disabled 1</paper-item>
      <paper-item>Disabled 2</paper-item>
    </paper-menu>
  </paper-submenu>
</paper-menu>

Just like in <paper-menu>, the focused item is highlighted, and the selected item has bolded text. Please see the <paper-menu> docs for which attributes (such as multi and selected), and styling options are available for the menu-content menu.