Re: [gtk-list] question about resizing & combos

[Gustavo Joćo Alves Marques Carneiro <ee96090 fe up pt>]

On Tue, 26 Oct 1999, Giaslas Georgios wrote:

> Hi all,
> i have the following two problems
> i've sent this mail again but none replied to me =:-(   
> 
> 1) if i have a menubar and a clist (or anything else)
>    inside a container and i resize the window (make it bigger)
>    both of the above widgets are resized too, but i want
> only the clist to be resized.
>    how can i do that?
> only the clist to be resized.
>    how can i do that?

	Assuming you're using a vertical box to contain these widgets, you
should pack the the menu bar with
gtk_box_pack_start(GTK_BOX(vbox),menubar,FALSE,FALSE,padding), that is
'expand' and 'fill' arguments set to FALSE.

	When packing the clist, do
gtk_box_pack_start(GTK_BOX(vbox),clist,TRUE,TRUE,padding);

> 
> 2) i have a combo box and when the user selects
>    a string i want all the strings before this to be removed.
>    i've done it and when i change the comboentry using
>    arrow keys it's ok. but when it's changed using the
>    mouse i get a segmentation fault.
>    Is it a bug or it's my fault?
>    please try the following little program to see what
>    i mean exactly.
> 
> (I use gtk+ version 1.2.6)
> 
> Please reply this time...
> 
> Thank you all
> 
> -----------------------------
> #include <gtk/gtk.h>
> 
> GList *glist=NULL;
>    gint active=0;
>    GtkWidget *combo;
>    GtkWidget *window;
> 
>    static gint delete_callback(GtkWidget *widget, gpointer data)
>    {
>        gtk_main_quit();
>        return(FALSE);
>    }
> 
>    void callback(GtkEntry *comboentry, gpointer data)
>    {
>        GList *l;
>        gint cnt=0;
>        if (active)
>        {
>            l=g_list_first(glist);
>            while (g_strcasecmp(l->data, gtk_entry_get_text(comboentry)))
>            {
>                g_print("data %s deleted\n", (gchar *) l->data);
>             	 glist=g_list_remove(glist, l->data);
>                g_free(l->data);

	g_free(l->data) should come before g_list_remove because it is
not guaranteed that the location pointed by 'l' is valid after you remove
it from the list.

>                cnt++;
>                l=g_list_first(glist);
>            }
	Also, you should take care that this previous 'while' doesn't ever
result in an endless loop.

>            gtk_combo_set_popdown_strings(GTK_COMBO(combo), glist);
>        }
>    }
> 
>    int main (int argc, char *argv[])
>    {
>        gtk_init(&argc, &argv);
>        window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
>        gtk_signal_connect(GTK_OBJECT(window), "delete_event",
>                            GTK_SIGNAL_FUNC(delete_callback), NULL);
>        combo=gtk_combo_new();
>        glist = g_list_append(glist, "String 1");
>        glist = g_list_append(glist, "String 2");
>        glist = g_list_append(glist, "String 3");
>        glist = g_list_append(glist, "String 4");
>        gtk_signal_connect(GTK_OBJECT(GTK_COMBO(combo)->entry), "changed",
>  GTK_SIGNAL_FUNC(callback), NULL);
> 
>        gtk_combo_set_popdown_strings( GTK_COMBO(combo), glist);
>        gtk_container_add(GTK_CONTAINER(window), combo);
>        gtk_widget_show_all(window);
>        active=1;
>        gtk_main();
>        return 0;
>    }
> --------------------------
> 
> 

-- 
Gustavo J.A.M. Carneiro
World::Portugal::FEUP::DEEC::LEEC::TEC
[reinolinux.fe.up.pt/~ee96090]