Re: problem with gtk_radio_tool_button_set_group function/

[Tadej Borovšak <tadeboro gmail com>]

Hi.

Sorry for the delay, but you left out the list from your reply and I
missed your mail.

> Thank you for answer, but the documentation states
>
> gtk_radio_tool_button_set_group ()
>
> void                gtk_radio_tool_button_set_group     (GtkRadioToolButton *button,
>                                                          GSList *group);
>
> Adds button to group, removing it from the group it belonged to before.
>
> button :
>
> a GtkRadioToolButton
>
> group :
>
> an existing radio button group
>
>
> but no where says that this group may be deleted, may be it's a documentation bug?))

Well, if you look on this subject from technical view, NULL pointer
represent empty GSList, so groups are never actually deleted. But in
real life, this really doesn't matter.

> in code below we add some buttons to group but the length of list of buttons belonging to that group equals 1!
> #include <gtk/gtk.h>
> int main (int argc, char **argv)
> {
> GtkWidget *radio_tool_btn_1 = NULL;
> GtkWidget *radio_tool_btn_2 = NULL;
> GtkWidget *radio_tool_btn_3 = NULL;
> GtkWidget *radio_tool_btn_4 = NULL;
> GSList *group1 = NULL;
> GSList *group2 = NULL;
> gint add_group_length_before = -1;
> gint add_group_length_after = -1;
> gtk_init (&argc, &argv);
> radio_tool_btn_1 = GTK_WIDGET(gtk_radio_tool_button_new(NULL));
> group1 = gtk_radio_tool_button_get_group(GTK_RADIO_TOOL_BUTTON(radio_tool_btn_1));
> radio_tool_btn_2 = GTK_WIDGET(gtk_radio_tool_button_new(NULL));
> group2 = gtk_radio_tool_button_get_group(GTK_RADIO_TOOL_BUTTON(radio_tool_btn_2));
> radio_tool_btn_3 = GTK_WIDGET(gtk_radio_tool_button_new(group2));
> radio_tool_btn_4 = GTK_WIDGET(gtk_radio_tool_button_new(group2));
> add_group_length_before = g_slist_length(group2);
> gtk_radio_tool_button_set_group(GTK_RADIO_TOOL_BUTTON(radio_tool_btn_3), group1);
> group2 = gtk_radio_tool_button_get_group(GTK_RADIO_TOOL_BUTTON(radio_tool_btn_2));
> add_group_length_after = g_slist_length(group2);
> printf("after:%d\nbefore:%d\n", add_group_length_after, add_group_length_before);
> return 0;
> }
> what you think about that??/  thanks)

add_group_length_before is 1 because adding button to groups prepends
elements to linked list. You haven't updated your pointer after the
last addition, which means that group2 points to last element in list
and g_slist_length() thus returns 1. Try adding this call just before
first g_slist_length() call and check the results then:

group2 = gtk_radio_tool_button_get_group(GTK_RADIO_TOOL_BUTTON(radio_tool_btn_2));

Tadej

--
Tadej Borovšak
tadeboro.blogspot.com
tadeboro gmail com
tadej borovsak gmail com