Re: Moving a GtkEntry to a char*

["Miguel Pignatelli" <pignatelli noraybio com>]

Hi Daniel,

Have you tried with strdup() ?
http://www.mkssoftware.com/docs/man3/strdup.3.asp

M


----- Original Message -----
From: "Daniel Miralles García" <namarie oasi upc es>
To: <gtk-app-devel-list gnome org>
Sent: Friday, February 06, 2004 1:27 PM
Subject: Moving a GtkEntry to a char*


> Hi everyone!
>
> I've tried to get the text from a GtkEntry and then putting it into a
> variable defined as a char* with strncpy because i want it to stay :)
>
> I'll explain myself.
>
> I've defined a gtkEntry called txt_nom_canal:
>   GtkWidget *txt_nom_canal;
>
> and on the other side, a struct like this:
>
>   typedef struct tipCanal {
>     char *nom;   // here is where i want the string to be put in
>     ...
>   } tipCanal;
>
> All right. I've tried on initializing,
>   [...]
>   tipCanal canal
>   canal.nom = " ";
>   [...]
>
> That's displayed ok.
>
> Now, I've got the window definition:
>
>   [...]
>   txt_nom_canal = gtk_entry_new ();
>   gtk_entry_set_max_length(GTK_ENTRY(txt_nom_canal), 20);
>   gtk_widget_show (txt_nom_canal);
>   [...]
>
> Let's have a little fun:
> (canal_vist is a tipCanal)
>
>   gdk_threads_enter(); // I'm multithreading ;)
>   printf("1\n");
>   strncpy(canal_vist.nom, gtk_entry_get_text(GTK_ENTRY(txt_nom_canal)),
> 20);
>   printf("2\n");
>
> It just displays "1" and segfaults. Don't know why. Also tried with
> strcpy(nom,entry).
>
>
>
> Well, I then tried the following:
>
>   gdk_threads_enter();
>   printf("1\n");
>   canal_vist.nom = gtk_entry_get_text(GTK_ENTRY(txt_nom_canal));
>   printf("2\n);
>
> This works fine (really?) NO! canal_vist, after some seconds, disappears.
> I think it's because gtk_entry_get_text returns a pointer that is reused
> by GTK, so I *must* copy the string somewhere (but i cannot). (At least
> the tutorial tells "The value returned by this function is used
> internally"). It must be with strcpy.
>
> This must be very easy to do and I'm getting crazy! Isn't somewhere over
> there a gtk_entry_put_text_into( the_widget, something_defined_as_char*) ?
>
> Lots of thanks in advance...
>
> .-:Namarie:-.
>
> p.d. Everything, using gtk1.2, so g_strcpy (does it exist?) maybe won't
> work...
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