Re: [Vala] How to call base constructors

În data de Jo, 07-05-2009 la 20:18 +0000, Jan Hudec a scris:
Adi Roiban <adi    > writes:
În data de Mi, 06-05-2009 la 17:48 +0000, Jan Hudec a scris:
For example in the case of MenuItem, we have the "activated" signal and
there is not way to pass userdata when connecting the signal.
The method called for the "activate" signal will only receive a pointer
to the MenuItem... and I can not pass userdata.

You can always specify a user data for g_signal_connect(). Vala uses
that pointer to pass in the *invocant* of the handler. So all you have to do
is create an object describing the action to take and connect it's instance
method (*not* static) to the activated signal of the menu item.
Thank you very much for you explanations!

I don't know how to connect userdata. Can you point me to some

Reading the Vala wiki pages I know I can use this syntax:

menuItem.activated += (sender) => {doSomething(sender)};

Where should I fit the userdata?

Alternatively, you can simply attach data to the MenuItem using the
Glib::Object method set_data (and corresponding get_data to read them).

I didn't knew about this nice feature of GObject. Thanks!

Maybe this is a problem with GTK bindings for Vala.

I see the only problem in that it might not be immediately obvious
where the data argument of g_signal_connect has gone and how to use it.
You are right, in this case the problem is between the chair and
keyboard :D

Adi Roiban

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