Re: [Vala] connecting/disconnecting a signal to a static member function?

[pancake <pancake youterm com>]

The signal connecting has become more strict. You should fix all  
function signatures to match the type of the first argument.

I did not tried to do this from static methods.

On Oct 9, 2010, at 6:50 AM, Yu Feng <rainwoodman gmail com> wrote:

> Dear List,
>
> Now that += and -= are deprecated syntax for signal handlers, I am  
> trying to update some signal code into the connect/disconnect syntax  
> on Vala 0.11.0.
>
> Here is the problem I couldn't get myself out from:
>
> 1. the signal connecting / disconnecting is performed in a static  
> member function.
> 2. the signal handlers are also static member function with no  
> 'instance' pointers.
>
> If I blindly replace the '-=' syntax with disconnect I get an error  
> message like this:
> gtk-widget.vala:110.29-110.45: error: Argument 1: Cannot convert  
> from `Widget.recursive_changed' to `GLib.Object.notify'
>            widget.notify.disconnect(recursive_changed);
>
> The signature of widget.recursive_changed is:
>        private static void recursive_changed(Gtk.Widget widget,  
> ParamSpec pspec);
> I remember there is a way of declaring the handler with has_instance  
> = 0 in the CCode annotations, but it wont work in this case as I am  
> calling disconnect from a static member function and can't access an  
> instance member.
> How shall I achieve this? The warning messages about -= and += are  
> getting very annoying(too many of them).
>
> Regards,
>
> Yu
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