GtkPopoverMenu is a subclass of #GtkPopover that treats its children like menus and allows switching between them. It is meant to be used primarily together with #GtkModelButton, but any widget can be used, such as #GtkSpinButton or #GtkScale. In this respect, GtkPopoverMenu is more flexible than popovers that are created from a #GMenuModel with gtk.popover.Popover.newFromModel.

To add a child as a submenu, set the #GtkPopoverMenu:submenu child property to the name of the submenu. To let the user open this submenu, add a #GtkModelButton whose #GtkModelButton:menu-name property is set to the name you've given to the submenu.

By convention, the first child of a submenu should be a #GtkModelButton to switch back to the parent menu. Such a button should use the #GtkModelButton:inverted and #GtkModelButton:centered properties to achieve a title-like appearance and place the submenu indicator at the opposite side. To switch back to the main menu, use "main" as the menu name.

Example

<object class="GtkPopoverMenu">
  <child>
    <object class="GtkBox">
      <property name="visible">True</property>
      <property name="margin">10</property>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">win.frob</property>
          <property name="text" translatable="yes">Frob</property>
        </object>
      </child>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="menu-name">more</property>
          <property name="text" translatable="yes">More</property>
        </object>
      </child>
    </object>
  </child>
  <child>
    <object class="GtkBox">
      <property name="visible">True</property>
      <property name="margin">10</property>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">win.foo</property>
          <property name="text" translatable="yes">Foo</property>
        </object>
      </child>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">win.bar</property>
          <property name="text" translatable="yes">Bar</property>
        </object>
      </child>
    </object>
    <packing>
      <property name="submenu">more</property>
    </packing>
  </child>
</object>

Just like normal popovers created using gtk_popover_new_from_model, #GtkPopoverMenu instances have a single css node called "popover" and get the .menu style class.