Re: modifiable dialog button labels?

[Roger Davis <rbd soest hawaii edu>]

Thanks, Lance! That looks promising, I'll try those (preferentially your 
second method, I think, as you suggested.

Roger

On Thu, 8 Mar 2012, Lance Dillon wrote:

> ______________________________________________________________________________
>       From: Roger Davis <rbd soest hawaii edu>
>       To: Lance Dillon <riffraff169 yahoo com>
>       Cc: "gtk-app-devel-list gnome org" <gtk-app-devel-list gnome org>
>       Sent: Thursday, March 8, 2012 2:07 AM
>       Subject: Re: modifiable dialog button labels?
>
>
>
> On Wed, 7 Mar 2012, Lance Dillon wrote:
>
> > you can use gtk_get_action_area() to get the GtkBox that that is the
> action
> > area, that itself contains the buttons.  I believe you can then get
> all the
> > child widgets, which would be the GtkButtons.
> >
> > The  docs for GtkDialog describes it some, but doesn't talk about
> getting the
> > buttons.  I think you would have to go to the page for GtkBox for how
> to get
> > the children.
>
> Hi Lance,
>
> The GtkDialog documentation tells only how to access the action area,
> not its children. Searching around I see a gtk_container_get_children()
> which presumably returns a list of GtkWidget pointers. Is there a way I
> can look at a widget pointer and detrmine the widget's type, i.e.,
> figure out whether or not it's a button? I see references to a
> gtk_widget_get_type() on the web, but no good examples of how it's used,
> and it appears to be not present at all in my own GTK release's
> GtkWidget documentation. There also seem to be some related type
> discovery functions in the gobject library such as g_type(), etc., but
> so far I have not found any useful examples of how I might use them to
> figure out if any particular widget pointer is a button or not.
>
> Thanks,
>
> Roger
>
> You would then use g_type_is_a() (possibly), perhaps with G_TYPE_FROM_INSTANCE
> and g_type_from_name():
>
> GList *g,*g1;
> g1=g=gtk_container_get_children(GTK_CONTAINER(gtk_dialog_get_action_area(dial
> ogbox)));
> while(g1);
> if (g_type_is_a(G_TYPE_FROM_INSTANCE(g1->data),g_type_from_name("GtkButton")))
> {
>   /* do something with button */
>   g1=g_list_next(g1);
> }
> g_list_free(g);
>
>
> You can of course create the dialog without buttons with gtk_dialog_new(),
> then add buttons manually with gtk_dialog_add_button(), and save the return
> value which is the widget, then change the labels on the buttons  when you
> need to.  That may be easier than the above:
>
> GtkWidget *d;
> d=gtk_dialog_new();
> GtkButton *b1,*b2;
> b1=gtk_dialog_add_button(GTK_DIALOG(d),"Wine",1);
> b2=gtk_dialog_add_button(GTK_DIALOG(d),"Beer",2);
>
> Then do your gtk_dialog_run() later.  Then when you need to change the values,
> you can just do gtk_button_set_label(b1,"Dog");
> gtk_button_set_label(b2,"Cat"), then reshow your dialog and gtk_dialog_run()
> again.