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Subject: Re: GtkAda callback and event
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From: DrPi <314@drpi.fr>
Date: Sun, 5 Sep 2021 17:20:27 +0200
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Le 05/09/2021 à 17:12, Dmitry A. Kazakov a écrit :
> On 2021-09-05 17:04, DrPi wrote:
>> Le 05/09/2021 à 16:58, DrPi a écrit :
>>> Le 05/09/2021 à 16:48, Dmitry A. Kazakov a écrit :
>>>> On 2021-09-05 15:50, DrPi wrote:
>>>>> Le 05/09/2021 à 00:29, Dmitry A. Kazakov a écrit :
>>>>
>>>>> With "Gtk.Arguments.Unchecked_To_Gdk_Event_Motion (Params, 1);" , I 
>>>>> get an error :
>>>>> expected private type "C_GValues" defined at glib-values.ads:53
>>>>> found private type "GValues" defined at glib-values.ads:48
>>>>
>>>> I see, then you must to implement it yourself. It could be something 
>>>> like this (not tested):
>>>>
>>>>     package Conversions is
>>>>        new System.Address_To_Access_Conversions (Gdk_Event_Motion);
>>>>
>>>>     Event : Gdk_Event_Motion renames
>>>>             Conversions.To_Pointer (Get_Address (Nth (Params, 1))).all;
>>>>
>>>
>>> So, Gtk.Arguments.Unchecked_To_Gdk_Event_Motion is useless ?
>> Like all subprograms accepting C_GValues as a parameter ?
> 
> It is a part of GValues object. But you could create a child package 
> that would have access to the internals of GValue and get access to 
> C_GValues in GValue.
> 
I didn't know I can create a  child Package of a GtkAda Package myself.

Thanks for all these explanations Dmitry.

Regards,
Nicolas