Assistant.connectPrepare

gulong connectPrepare(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  void)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  gtk.widget.Widget)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  gtk.assistant.Assistant)))
   &&  Parameters!T.length <  3)

Connect to Prepare signal.

The ::prepare signal is emitted when a new page is set as the assistant's current page, before making the new page visible.

A handler for this signal can do any preparations which are necessary before showing page.

Parameters

`callback`	signal callback delegate or function to connect `void callback(gtk.widget.Widget page, gtk.assistant.Assistant assistant)` `page` the current page (optional) `assistant` the instance the signal is connected to (optional)
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID