Re: radio_button behavior with toggle_button style ?

[Olexiy Avramchenko <olexiy irtech cn ua>]

Alain D'EURVEILHER wrote:

> Hi,
>
> Is it possible to make a group of toggle button, but behavioring as the 
> radiobuttons ??
>
> Here it is... : have for example 3 toggle_button and, pressing one down 
> release (up) the other ones...
>  
Hello, here's one of the possible solutions:

static void button_toggled(GtkToggleButton *toggle, GSlist **list)
{
GSlist *node;

   g_return_if_fail(*list != NULL);    /* this is for debugging only */

   if (!toggle->active)    /* skip the code below if button is depressed */
       return;

   for (node=*list; node!=NULL; node=node->next)
       if (node->data != toggle)    /* iterate through the list and 
deactivate all buttons other than pressed */
           
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON((*list)->data), FALSE);
}

/* helper function, saves some lines of code */
static GtkWidget *toggle_new(GSList **list, const gchar *label)
{
GtkWidget *button;

   button = gtk_toggle_button_new_with_label(label);
   g_signal_connect(button, "toggle", G_CALLBACK(button_toggled), list);
   *list = g_slist_prepend(*list, button);    /* adding button to the 
list (prepend is faster than append) */
}

void setup()
{
GtkWidget *button1, *button2, *button3;
static GSList *list;    /* this var SHOULD be static */

   /* creating 3 widgets */
   button1 = toggle_new(&list, "toggle 1");
   button2 = toggle_new(&list, "toggle 2");
   button3 = toggle_new(&list, "toggle 3");
}

PS: I just typed some C lines here, so some typos/bugs can be found

   Olexiy