Re: [Gtk2hs-users] Implementation a custom object derived from GtkSourceView

[Michael S. <msh...@in...>]

On 07/07/12 04:08, Axel Simon wrote:
> Hi Michael,
>
> On 06.07.2012, at 18:03, Michael Sharman wrote:
>
>> Hi,
>>
>> I'm new to Gtk2hs but relatively familiar with Haskell and have a
>> question related to implementation of custom widgets derived from other
>> GTK widgets.
>>
>> What I would like to is to derive an object from
>> Graphics.UI.Gtk.SourceView.SourceBuffer that would add functionality in
>> a similar way to how GtkSourceBuffer derives from GtkTextView.
>>
>> As far as I can tell Gtk2Hs doesn't have that level of interoperability
>> from Haskell to GObject ?
>>
>> Is that correct?
> Yes, there is no real way to create all the proper stuff so that a Haskell GObject looks like a C GObject. But that may not be necessary. You can attach additional attributes to any GObject. Signals that are being emitted can be connected to and their standard C handler can be disabled which allows for some sort of inheritance. So, maybe you can implement what you want by adding some additional features to an existing object?
>
> Cheers,
> Axel
>
Thanks, I'll try connecting to events and see what is possible.

Michael