ToolItem.connectCreateMenuProxy

gulong connectCreateMenuProxy(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  bool)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  gtk.tool_item.ToolItem)))
   &&  Parameters!T.length <  2)

Connect to CreateMenuProxy signal.

This signal is emitted when the toolbar needs information from tool_item about whether the item should appear in the toolbar overflow menu. In response the tool item should either

call [gtk.tool_item.ToolItem.setProxyMenuItem] with a null

pointer and return true to indicate that the item should not appear in the overflow menu

call [gtk.tool_item.ToolItem.setProxyMenuItem] with a new menu

item and return true, or

return false to indicate that the signal was not handled by the item.

This means that the item will not appear in the overflow menu unless a later handler installs a menu item.

The toolbar may cache the result of this signal. When the tool item changes how it will respond to this signal it must call [gtk.tool_item.ToolItem.rebuildMenu] to invalidate the cache and ensure that the toolbar rebuilds its overflow menu.

Parameters

`callback`	signal callback delegate or function to connect `bool callback(gtk.tool_item.ToolItem toolItem)` `toolItem` the instance the signal is connected to (optional) `Returns` true if the signal was handled, false if not
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID