Re: nameless instances of objects

[Azrael <azrael azrael-uk f2s com>]

I am positive my question wasn't phrased all that well but thanks for
your helpful answer.. and while I don't have a full grip on signals and
such as yet.. I know vaguely how they work.. and I know they don't work
like in java where you specifically attach them to something.

So I have a toolbar, and I will create buttons on it dynamically during
program operation. I have 1 signal they all use (what it does depends on
the data the signal passes.)

But when I do:
widget = gtk_button_new(...);
I won't know the widget name.. are you telling me that I don't need to
give it a unique name? That I can reuse the same name for each button I
create and add?

So I end up with something like:

button = gtk_button_new(); 
g_signal_connect (G_OBJECT (button), "button_press_event",
                  G_CALLBACK (button_pressed), "UniqueInfo");

In between those 2 lines (for an explicit button) I have about 13 lines
more code, involving alignment objects, images, etc.. can that stuff
also be used generically without names?

Hope this also makes sense.. and better asks what I want to ask :)

On Wed, 2002-12-11 at 21:01, Tristan Van Berkom wrote:
> > I was wondering if it was possible to namelessly generate instances of
> > 'objects' in Gtk.
>
>       I think that widget names are only for
> theeming purposes (or at least thats
> all I've used them for).
>
> > If I can create un-named objects/widgets/buttons how do I go about
> > attaching signals to them? As obviously each new button would need to
> > have a signal attached to it relating to the purpose it was created for.
>
>       You dont attach signals to widgets;
> widgets come with signals. if you want to connect a handler
> to a signal emitted by that widget; all you need is the
> address (returned by g_object_new(G_TYPE...)).
>
>       if you add the widgets to a container implementation
> (i.e. A window) than you dont really need to worry about
> freeing them. (they become the property of the container
> unless you hold an explicit reference on them).
>
> so basicly you want to:
>
> widget = gtk_???_new(...);
> g_signal_connect(... widget ... handler ...);
> gtk_container_add(GTK_CONTAINER(container), widget);
>
> if you want to remove that widget from the 
> container before the container is destroyed you'll
> need to hold on to its address.
>
>
> Cheers,
>                       -Tristan
-- 
                Azrael

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