From: Gavin McCord <gavind.mccord@gmail.com>
Subject: Re: On_Button_Press_Event in Text_View
Date: Wed, 14 Aug 2024 11:42:14 -0000 (UTC) [thread overview]
Message-ID: <v9i56l$edfn$1@dont-email.me> (raw)
In-Reply-To: v9gfo7$1rq4$1@dont-email.me
On Tue, 13 Aug 2024 22:29:59 +0200, Dmitry A. Kazakov wrote:
> On 2024-08-13 13:37, Gavin McCord wrote:
>
>> I have a custom handler used when I update the Text_Buffer:
>>
>> Button_Callback.Connect
>> (Update_Button, "clicked", Update_Clicked'Access,
>> Buffer_To_Pass);
>>
>> That works fine so I was imagining something similar might be possible,
>> but I've run through various permuations of records and access types
>> but not yet got a working callback.
>>
>> Any help gratefully received (I can post the full code if that's
>> useful).
>
> Something like this:
>
> package Event_Handlers is
> new Gtk.Handlers.User_Return_Callback
> ( GObject_Record,
> Boolean, User_Data_Type
> );
>
>
> function On_Button_Press
> ( Object : access GObject_Record'Class;
> Event : Gdk_Event; Data : User_Data_Type
> ) return Boolean;
>
>
> View.Set_Events (View.Get_Events or Button_Press_Mask);
> Event_Handlers.Connect ( View,
> "button-press-event",
> Event_Handlers.To_Marshaller (On_Button_Press'Access),
> Data
> );
Thank you. That allows me to pass a record of the buffer.
There's only one other thing.
If I try to check the Event I get another error, such as
function On_Button_Press
[skipped lines]
if Event.The_Type = Gdk_2button_Press then
Put_Line ("double-click");
end if;
Attempting to compile that gives me
error: cannot reference discriminant of unchecked union
Gavin McCord
next prev parent reply other threads:[~2024-08-14 11:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-13 11:37 On_Button_Press_Event in Text_View Gavin McCord
2024-08-13 20:29 ` Dmitry A. Kazakov
2024-08-14 11:42 ` Gavin McCord [this message]
2024-08-14 12:03 ` Dmitry A. Kazakov
2024-08-14 14:34 ` Gavin McCord
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