Gtk.ActionGroup::connect-proxy

function callback(action_group, action:Gtk.Action, proxy:Gtk.Widget, ):void;

The ::connect-proxy signal is emitted after connecting a proxy to an action in the group. Note that the proxy may have been connected to a different action before.

This is intended for simple customizations for which a custom action class would be too clumsy, e.g. showing tooltips for menuitems in the statusbar.

Gtk.UIManager proxies the signal and provides global notification just before any action is connected to a proxy, which is probably more convenient to use.

Since 2.4